CN112866143B - A device and chip that implements the 802.1CB protocol - Google Patents

Abstract

The invention provides a device and a chip for implementing the 802.1CB protocol. The device includes: a message forwarding subsystem for determining the stream ID and 802.1CB frame mark of the received first 802.1 frame; The 802.1CB frame marking enables the elimination of redundant frames; the queue management subsystem is used to perform flow control on the first 802.1 frame based on the flow ID; and is also used to copy to multiple forwarding ports based on the flow ID The first 802.1 frame; is also used to enable and control the generation of a mark of the 802.1CB protocol of the first 802.1 frame based on the 802.1CB frame mark; a message editing subsystem, used to mark based on the 802.1CB frame Enable and control the addition or deletion of the mark of the 802.1CB protocol to the first 802.1 frame; and also be used to adapt the first 802.1 frame based on the forwarding port to send it out. The device and chip of the present invention can flexibly realize the flow identification, flow copy and frame elimination functions of the 802.1CB protocol, so as to reduce the complexity of implementation, flexibly cope with various application scenarios, and reduce the complexity of maintenance.

Description

A device and chip that implements the 802.1CB protocol

Technical field

The present invention relates to the field of digital communications, and in particular to the field of devices and chips that implement the 802.1CB protocol.

Background technique

In current digital communications, when using switches to implement the 802.1CB protocol, it is generally implemented centrally by specialized modules. That is, the functions of flow identification, flow duplication, and flow elimination specified by 802.1CB are integrated and implemented. Although this method has high code concentration, it will greatly increase the complexity of the implementation, and because the code coupling is too strong, it is not flexible enough to deal with various application scenarios. In addition, this module must interact with each module of the entire switch. Due to the integration of functions, the number of interface signals of this module is huge and the maintenance complexity is high.

Therefore, how to more flexibly implement the functions of flow identification, flow duplication, and frame elimination specified by 802.1CB, so as to reduce the complexity of implementation, flexibly respond to various application scenarios, and reduce maintenance complexity, is a technical problem that needs to be solved.

Contents of the invention

In view of this, embodiments of the present invention provide a device and a chip for implementing the 802.1CB protocol, which are based on a flexible configuration of multi-module methods to reduce implementation complexity, flexibly respond to diverse application scenarios, and reduce maintenance complexity.

In a first aspect, an embodiment of the present invention provides a device for implementing the 802.1CB protocol, which is characterized by including:

The message forwarding subsystem is used to determine the flow ID and 802.1CB frame mark of the received first 802.1 frame; it is also used to enable the elimination of redundant frames based on the 802.1CB frame mark; the queue management subsystem is used to Perform flow control on the first 802.1 frame based on the flow ID; also be configured to copy the first 802.1 frame to multiple forwarding ports based on the flow ID; and be further configured to enable and Control the generation of the mark of the 802.1CB protocol of the first 802.1 frame; the message editing subsystem is used to enable and control the addition or deletion of the mark of the 802.1CB protocol to the first 802.1 frame based on the mark of the 802.1CB frame; It is also used to adapt the first 802.1 frame based on the forwarding port to send it out.

From the above, the above device realizes 802.1CB seamless redundant transmission and flow control in a single device. The two share the flow ID, and the interface between the two functions is simple and easy to implement.

In a possible implementation of the device for implementing the 802.1CB protocol in the first aspect, the device further includes an entry configuration subsystem for determining the location of the device based on the location of the device in the 802.1CB network. The forwarding control table is configured with an entry indexed by the Key of the first 802.1 frame. The entry includes the flow ID and the 802.1CB frame tag. The 802.1CB frame tag includes one of the following tags. or more: a start tag, an end tag, a frame elimination enable tag and a protocol tag start tag; the Key of the first 802.1 frame at least includes a combination of the VLANID of the first 802.1 frame and the source MAC or destination MAC.

From the above, the above device is used to control the operation of each subsystem of the device through each tag set based on the position of the device in the 802.1CB network, thereby flexibly adapting to multiple scenarios. Compared with a device with one configuration mode , reducing the complexity of implementation and maintenance of the device.

In a possible implementation of a device for implementing the 802.1CB protocol in the first aspect, the message forwarding subsystem includes: a flow identification module configured to determine the first 802.1 frame based on the Key of the first 802.1 frame. The flow ID frame mark determination module of the 802.1 frame is configured to query the entry corresponding to the flow ID from the forwarding control table based on the Key of the first 802.1 frame, and determine it to be the 802.1CB frame of the first 802.1 frame. a relevant tag in the tag; a frame elimination module, configured to delete the second 802.1 frame in the first 802.1 frame when the frame elimination enable tag in the 802.1CB frame tag is valid; the second 802.1 frame is A frame that is not the first to arrive among the first 802.1 frames with the same flow ID and the same 802.1CB frame sequence number.

From the above, the above device is used to control the work of each module of the message forwarding subsystem of the device through each tag set based on the position of the device in the 802.1CB network, thereby flexibly adapting to various scenarios, relatively The device is configured in one configuration, which reduces the complexity of implementation and maintenance of the device.

In a possible implementation of the device for implementing the 802.1CB protocol of the first aspect, the queue management subsystem includes: a flow control module configured to determine its flow control information based on the flow ID of the first 802.1 frame. , and implement flow control accordingly; a flow copy module, configured to determine its forwarding port and the control information of the forwarding port based on the flow ID of the first 802.1 frame, and copy the first 802.1 frame to each of the forwarding ports, Send the port control information to the message editing system; a generating module configured to generate the first 802.1 frame based on the protocol mark start mark when the starting point mark in the 802.1CB frame mark is valid. The mark of the 802.1CB protocol; the mark of the 802.1CB frame includes the 802.1CB frame sequence number.

From the above, the above device is used to control the work of each module of the queue management subsystem of the device through each tag set based on the position of the device in the 802.1CB network, thereby flexibly adapting to various scenarios. A configuration mode device reduces the complexity of implementation and maintenance of the device.

In a possible implementation of the device for implementing the 802.1CB protocol in the first aspect, the message editing subsystem includes: a frame editing module, configured to when the starting point mark in the 802.1CB frame mark is valid, Insert the mark of the 802.1CB protocol into the first 802.1 frame; or be used to delete the mark of the 802.1CB protocol from the first 802.1 frame when the end point mark is valid; a port adaptation module, used Transmission adaptation is performed on the first 802.1 frame based on its forwarding port for sending out.

From the above, the above device is used to control the work of each module of the message editing subsystem of the device through each mark set based on the position of the device in the 802.1CB network, thereby flexibly adapting to various scenarios, relatively The device is configured in one configuration, which reduces the complexity of implementation and maintenance of the device.

In a possible implementation of the device for implementing the 802.1CB protocol of the first aspect, the message forwarding subsystem further includes a frame marking first encapsulation module for converting the stream ID of the first 802.1 frame and The start tag, end tag and frame sequence number start tag in the 802.1CB frame tag are encapsulated in the first control block of the frame tag to be sent to the queue management subsystem.

From the above, the frame mark is encapsulated in the first control block of the frame mark, which facilitates transmission using the same control block in multiple scenarios and has a simple interface.

In a possible implementation of the device for implementing the 802.1CB protocol in the first aspect, the queue management subsystem further includes a frame mark second encapsulation module, which is used when the start mark in the 802.1CB frame mark is valid. When the mark of the 802.1CB protocol of the first 802.1 frame, the flow ID and the start mark and the end mark in the 802.1CB frame mark are encapsulated in the second control block of the frame mark, so as to forward the message to the message. Edit subsystem sends.

From the above, when the starting point mark in the 802.1CB frame mark is valid, the 802.1CB frame protocol mark is added to the second control block of the frame mark to facilitate transmission between modules and to simplify the interface.

In a possible implementation of a device for implementing the 802.1CB protocol in the first aspect, the end node of the 802.1CB network where the device is located is an 802.1CB protocol proxy node of an external second destination node, and the end node When the MAC replacement function is not provided, the entry configuration subsystem is also configured to configure a MAC replacement enable flag in the entry of the forwarding control table of the device; the frame mark determination module is also configured to configure the MAC replacement enable flag based on the first The Key of the 802.1 frame queries the MAC replacement enable flag in the entry corresponding to the flow ID from the forwarding control table and determines it to be the MAC replacement enable flag of the first 802.1 frame; the queue management subsystem also A DMAC information determination module is included, configured to determine the DMAC information of the second destination node based on the flow ID of the first 802.1 frame when the MAC replacement enable flag is valid; the DMAC information at least includes the second The MAC address of the destination node, the flow priority of the transmitted message and the VLAN arriving at the second destination node; the message editing subsystem also includes a DMAC information replacement module, used when the MAC replacement enable flag is valid , replacing the corresponding information in the first 802.1 frame with the DMAC information.

From the above, using the above device, the MAC replacement tag is set based on the position of the device in the 802.1CB network, thereby flexibly adapting to various scenarios of the 802.1CB protocol proxy. Compared with a device with one configuration mode, all costs are reduced. The complexity of implementation and maintenance of the described device.

In a possible implementation of the device for implementing the 802.1CB protocol of the first aspect, the queue management subsystem further includes a third frame mark encapsulation module, configured to encapsulate the frame when the MAC replacement enable mark is valid. The DMAC information of the second destination node, the flow ID, and the start tag and end tag in the 802.1CB frame mark are encapsulated in the second control block of the frame mark to be sent to the message editing subsystem.

From the above, when the MAC replacement enable flag is valid, the DMAC information of the second destination node is added to the second control block of the frame mark, which facilitates transmission between modules and has a simple interface.

In the second aspect, an embodiment of the present invention is a chip that implements the 802.1CB protocol, having any module including the device described in the first aspect.

From the above, the chip realizes the flow identification, frame elimination, flow replication and flow control of 802.1CB as well as the 802.1CB function agent on the chip, supports flexible configuration based on the actual node location of the device, and reduces the complexity of chip implementation and maintenance. Spend.

Description of the drawings

Figure 1 is a schematic structural diagram of Embodiment 1 of a device for implementing the 802.1CB protocol of the present invention;

Figure 2A is a schematic diagram of the network structure used in the second embodiment of a device for implementing the 802.1CB protocol of the present invention;

Figure 2B is a schematic structural diagram of Embodiment 2 of a device for implementing the 802.1CB protocol of the present invention;

Figure 3 is a schematic structural diagram of a specific implementation mode of Embodiment 2 of a device for implementing the 802.1CB protocol of the present invention.

Detailed ways

In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or a different subset of all possible embodiments, and Can be combined with each other without conflict.

In the following description, the terms "first\second\third, etc." or module A, module B, module C, etc. are only used to distinguish similar objects or to distinguish different embodiments. Representing a specific ordering of objects, it will be understood that the specific order or sequence may be interchanged where permitted so that the embodiments of the invention described herein can be practiced in other than as illustrated or described herein.

In the following description, the labels indicating steps involved, such as S110, S120, etc., do not necessarily mean that this step will be executed. If permitted, the order of the preceding and following steps can be interchanged, or executed at the same time.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terminology used herein is for the purpose of describing embodiments of the present invention only and is not intended to limit the present invention.

The embodiment of the present invention is mainly used in time-sensitive network TSN, and related terms are briefly introduced.

TSN (Time Sensitive Networking) refers to a set of "sub-standards" developed based on specific application requirements under the IEEE802.1 standard framework, aiming to establish a "universal" time-sensitive mechanism for the Ethernet protocol. , to ensure the time determinism of network data transmission. Since TSN is a protocol standard under IEEE802.1, TSN is a protocol standard for the second layer in the Ethernet communication protocol model, which is the data link layer (more specifically, the MAC layer). The main technical contents involved in the TSN standard include:

802.1CB is a standard for reliable flow replication and frame elimination. It is used to improve network reliability for flow replication and frame elimination. This standard ensures that copies of critical flows can be transmitted in disjoint sets of paths in the network, and only the packets that arrive at the destination first are retained, thereby achieving seamless redundancy.

802.1QCI is a standard for flow filtering and monitoring, also called a flow control standard. It is used to avoid traffic overload (which may be caused by software errors on endpoints or switches) affecting the receiving node. Flow control can also be used Block malicious cyber attacks.

ACL, ACL (Access Control Lists, Access Control List) is an access control technology based on packet filtering. It can filter data packets on the interface according to set conditions, allowing them to pass or discard them. Access control lists are widely used in routers and Layer 3 switches. With the help of access control lists, users' access to the network can be effectively controlled, thus ensuring network security to the greatest extent.

For 802.1 flows and 802.1 frames, 802.1 frames with the same source MAC and destination MAC belong to the same 802.1 flow and have a common flow ID.

The 802.1CB frame is an 802.1 frame with an 802.1CB protocol mark. The 802.1CB protocol mark is the 802.1CB frame sequence number. The 802.1CB frame with the same 802.1CB frame sequence number but not the first to arrive is a redundant 802.1CB frame.

The following is an introduction to each device embodiment of the present invention for implementing the 802.1CB protocol with reference to Figures 1 to 3.

[Embodiment 1 of a device for implementing the 802.1CB protocol]

Figure 1 shows the structure of Embodiment 1 of a device for implementing the 802.1CB protocol, which includes a message forwarding subsystem 100, a queue management subsystem 200, a message editing subsystem 300 and an entry configuration subsystem 400.

Among them, the message forwarding subsystem 100, the queue management subsystem 200 and the message editing subsystem 300 are specific subsystems for the device to implement the 802.1CB protocol. The table configuration subsystem 400 is based on the device's respective configuration in the 802.1CB network. The table entry of the 802.1 frame is used to control the work of the message forwarding subsystem 100, the queue management subsystem 200, or the message editing subsystem 300 to implement the functions of the 802.1CB protocol.

Next, we will continue to introduce each subsystem separately in conjunction with Figure 1.

The entry configuration subsystem 400 is configured to configure an entry indexed by the Key of the 802.1 frame in the forwarding control table of the device based on the location of the device in the 802.1CB network. The entry includes the Key of the 802.1 frame. Flow ID and 802.1CB frame mark, the 802.1CB frame mark includes one or more of the following marks: start mark, end mark, frame elimination enable mark and protocol mark start mark; the Key includes at least the first A combination of the VLAN ID and the source MAC or destination MAC of an 802.1 frame.

Wherein, when the device is the start node of the 802.1CB network, the start tag and end tag of the entry are set to 1 and 0 respectively.

When the device is an intermediate node of the 802.1CB network, both the start tag and the end tag of the entry are set to 0.

When the device is the end node of the 802.1CB network, the start tag and end tag of the entry are set to 0 and 1 respectively.

When the device has multiple adjacent nodes in the 802.1CB network, and the device receives the first 802.1 frames of multiple nodes from the 802.1CB network, the entry of the entry The frame elimination enable flag is set to 1, otherwise it is set to 0.

When the device is started, the protocol flag start flag of the entry is set to 1, and is set to 0 in other cases.

For example, in this embodiment, each flag is set to 1, indicating that the flag is valid; set to 0, indicating that the flag is invalid.

The message forwarding subsystem 100 includes a flow identification module 110, a frame mark determination module 120, a frame elimination module 130, and a forwarding module 140.

The flow identification module 110 is configured to determine the flow ID of the first 802.1 frame based on the Key of the first 802.1 frame.

Wherein, when the device is an intermediate node or an end node of the 802.1CB network, each of the first 802.1 frames already contains the 802.1CB frame sequence number, which can be expressed as an 802.1CB frame; when the device When it is the starting node of the 802.1CB network, each first 802.1 frame does not include the 802.1CB frame sequence number and is a standard 802.1 frame. Regardless of whether a standard 802.1 frame or an 802.1CB frame is received, it is collectively referred to as the first 802.1 frame here.

Optionally, the Key includes at least a combination of the VLAN ID of the first 802.1 frame and a source MAC or a combination of the destination MAC, and may also include one or more of the following: source IP, destination IP, source Port, and destination Port.

For example, the flow identification module 110 queries the preconfigured forwarding control table based on the Key of the first 802.1 frame to obtain its flow ID.

From the above, the flow ID determined based on the above module can not only be used by processes related to the 802.1CB protocol, but also can be used by processes related to the 802.1QCI protocol, so that the device can not only handle the operations of the 802.1CB protocol, but also Perform 802.1QCI flow control operations.

The frame mark determination module 120 is configured to query the relevant mark in the entry corresponding to the Key of the first 802.1 frame from the forwarding control table based on the Key of the first 802.1 frame, and determine it to be the 802.1 of the first 802.1 frame. Related tags in CB frame tags. The frame mark determination module 120 is also configured to set the protocol mark start flag in the 802.1CB frame mark.

Wherein, the start tag, end tag, frame elimination enable tag and protocol tag start tag of the relevant tags in the entry are respectively determined to be corresponding tags among the 802.1CB frame tags of the first 802.1 frame. The protocol mark startup flag is also represented as a sequence number startup flag. In this embodiment, the protocol mark startup flag and the sequence number startup flag have the same meaning. To facilitate understanding, the sequence number startup flag is used in the following.

Wherein, the start tag, end tag and frame elimination enable tag in the entry corresponding to the flow ID are configured differently based on the location of the device in the 802.1CB network. Therefore, the 802.1CB of the first 802.1 frame The start mark, end mark, sequence number start mark and frame elimination enable mark of the frame mark are also determined based on the location of the device in the 802.1CB network.

Wherein, when the device is the starting node of the 802.1CB network, the starting point mark of the first 802.1CB frame is 1 and the end point mark is 0; the serial number startup mark when the device is started is 1, and in other cases The serial number startup flag is 0.

Wherein, when the device is the end node of the 802.1CB network, the starting point of the first 802.1CB frame is marked as 0 and the end point is marked as 1.

Wherein, when the device is an intermediate node of the 802.1CB network, the starting point of the first 802.1CB frame is marked as 0 and the end point is marked as 0.

Wherein, when the device has multiple adjacent nodes in the 802.1CB network, and the device receives the first 802.1 frames of multiple nodes from the 802.1CB network, the first The frame erasure enable flag of an 802.1CB frame is set to 1 and set to 0 otherwise.

When the device is started, the protocol flag start flag of the first 802.1CB frame is set to 1, and is set to 0 in other cases.

The frame elimination module 130 is configured to delete the second 802.1 frame in the first 802.1 frame when the frame elimination enable flag is 1. The second 802.1 frame is all the frames with the same flow ID and the same frame sequence number. The first 802.1 frame is not the first to arrive.

Wherein, when the device is the starting node of the 802.1CB network or the device only receives the first 802.1 frame from one node, the frame erasure enable flag is invalid. When the device receives the first 802.1 frames from multiple nodes in the 802.1CB network, the frame elimination enable flag is valid. At this time, the first 802.1 frame is an 802.1CB frame.

Among them, the frame elimination module 130 retains the first arriving frame among the first 802.1 frames with the same flow ID and the same 802.1CB frame sequence number, and deletes the first arriving frame with the same flow ID and the same 802.1CB frame number. 802.1CB frame sequence number of the first 802.1 frame.

The forwarding module 140 is configured to determine its forwarding port and port control information based on the destination MAC address of the first 802.1 frame, and exchange the first 802.1 frame and port control information to the forwarding port.

Among them, the forwarding module 140 determines the forwarding port of the first 802.1 frame based on the relationship table between the forwarding port and the destination MAC address of the switch, switches the first 802.1 frame to the forwarding port, and reports it to the message editing subsystem. 300 sends the port control information of the forwarding port. Because the forwarding port is selected in this module based on the relationship table between the forwarding port of the switch and the destination MAC address, which is the forwarding port determination method of ordinary L2 switches, only one forwarding port can be queried. When the device has only one preceding neighbor node, this module can replace the subsequent stream copy module 220.

A special application example of this module is to forward the first 802.1 frame from one device to another device when multiple devices are stacked.

Among them, the forwarding module 140 can work on both 802.1 standard frames and 802.1CB frames.

The queue management subsystem 200 includes a QCI flow control module 210, a flow replication module 220, and a frame sequence number generation module 230.

The QCI flow control module 210 is configured to determine the flow control information of the first 802.1 frame based on its ID, and implement flow control on it.

Among them, the flow index table configured in advance is queried based on the ID of the first 802.1 frame, and the QCI flow control information of the first 802.1 frame is determined, including whether queuing is allowed in the case of overload, whether resources of other flows are allowed to be preempted, and whether Allow other streams to preempt its own resources, etc. The flow index table records the flow ID and its corresponding QCI flow control information and forwarding port.

Among them, the QCI flow control module 210 can work on both 802.1 standard frames and 802.1CB frames.

From the above, the QCI flow control module 210 realizes flow control synchronously in the device of the 802.1CB protocol.

The flow copy module 220 is configured to determine each forwarding port and the port control information of each forwarding port based on the flow ID of the first 802.1 frame, copy the first 802.1 frame to each forwarding port, and send the first 802.1 frame to the message editor. System 300 sends the port control information.

Wherein, when the device has multiple pre-order neighboring nodes, this module queries the flow index table configured in advance based on the ID of the first 802.1CB frame to obtain the forwarding port and the port control information. If there are multiple forwarding ports, a corresponding number of copies will be made.

Wherein, when the end point mark is 1 or there is only one preceding adjacent node, the stream copy module 220 is not enabled.

Among them, the stream copy module 220 can work on both 802.1 standard frames and 802.1CB frames.

The frame sequence number generation module 230 is configured to generate a mark of the 802.1CB protocol of the first 802.1 frame based on the 802.1CB frame mark. The mark of the 802.1CB protocol includes an 802.1CB frame sequence number. In this embodiment, the mark of the 802.1CB protocol Only the 802.1CB frame sequence number is included, and the two have the same meaning. To facilitate understanding, this embodiment uses the 802.1CB frame sequence number instead of the mark of the 802.1CB protocol.

The frame sequence number generation module 230 generates an 802.1CB frame sequence number for the 802.1 standard frame. At this time, the first 802.B frame is an 802.1CB frame.

Wherein, when the starting point mark of the first 802.B frame is 1, that is, the device is a starting point node, and the frame sequence number generation module starts the first 802.1 with a mark of 1 for the sequence number. For a CB frame, its frame sequence number is set to 0; for the first 802.1CB frame whose sequence number start flag is 0, its frame sequence number is incremented by adding 1.

The message editing subsystem 300 includes a first frame editing module 310 , a second frame editing module 320 and a port adaptation module 330 .

The first frame editing module 310 is used to insert an 802.1CB frame sequence number into the first 802.1 frame, so that the first 802.1CB frame is suitable for sending to other nodes of the 802.1CB protocol.

Wherein, when the starting point mark of the first 802.1 frame is 1, the first 802.1 frame is an 802.1 standard frame, and the first frame editing module 310 inserts an 802.1CB frame sequence number into the frame as a support Mark of the 802.1CB protocol. At this time, the first 802.1 frame is an 802.1CB frame.

The second frame editing module 320 is used to delete the 802.1CB frame sequence number from the first 802.1CB frame, so that the first 802.1CB frame is suitable for sending to other non-802.1CB protocol nodes.

Wherein, when the end point mark is 1, the first 802.1 frame is an 802.1CB frame at this time, and the second frame editing module 320 deletes the 802.1CB protocol mark of the first 802.1 frame. At this time, the first 802.1 The frame is an 802.1CB standard frame, which facilitates subsequent transmission to other non-802.1CB protocol nodes in the format of the 802.1 standard frame.

Among them, in an actual network, the first frame editing module 310 and the second frame editing module 320 have an alternative relationship, and the two can be combined to form a frame editing module.

The port adaptation module 330 is configured to adapt the first 802.1 frame, and after adaptation, the forwarded port sends it out.

Wherein, the port adaptation at least includes VLAN ID, transmission priority and other adaptations.

The table entry configuration corresponding to the first embodiment of the device and the working conditions of each module are introduced based on actual usage scenarios.

When the device is the start node of the 802.1CB network and there is more than one pre-order neighboring node, the entry of the flow ID of the first 802.1 frame is configured as: the start mark is 1 and the end mark is 0 , the frame elimination enable flag is 0. Because the serial number startup flag is only set to 1 when the device is started, and is set to 0 in other cases, it is also set in the same manner in subsequent descriptions. For the sake of simplicity, the description of the setting of the serial number startup flag will be omitted in the following.

The relevant 802.1CB frame tag of the first 802.1 frame is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110 and the frame mark determination module 120 of the message forwarding subsystem 100 work.

·The QCI flow control module 210, flow copy module 220 and frame sequence number generation module 230 of the queue management subsystem 200 work.

·The first frame editing module 310 and the port adaptation module 330 of the message editing subsystem 300 work.

The working sequence of the above modules is:

Flow identification module 110 → frame mark determination module 120 → QCI flow control module 210 → flow copy module 220 → frame sequence number generation module 230 → frame editing first module 310 → port adaptation module 330.

When the device is the start node of the 802.1CB network and there is only one pre-order neighboring node, the entry of the flow ID of the first 802.1 frame is configured as follows: the start mark is 1, the end mark is 0, Frame erasure enable flag is 0.

The relevant frame mark of the first 802.1 frame is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110, the frame mark determination module 120 and the forwarding module 140 of the message forwarding subsystem 100 work.

·QCI flow control module 210 and frame sequence number generation module 230 of the queue management subsystem 200;

·The first frame editing module 310 and the port adaptation module 330 of the message editing subsystem 300 work.

The working sequence of the above modules is:

Flow identification module 110→frame mark determination module 120→forwarding module 140→QCI flow control module 210→frame sequence number generation module 230→frame editing first module 310→port adaptation module 330.

When the device is an intermediate node of the 802.1CB network and has one subsequent neighboring node and multiple preceding neighboring nodes, the entry of the flow ID of the first 802.1 frame is configured as: starting point mark is 0, the end mark is 0, and the frame elimination enable mark is 0.

The relevant 802.1CB frame tag of the first 802.1 frame is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110 and the frame mark determination module 120 of the message forwarding subsystem 100 work;

·QCI flow control module 210 and flow replication module 220 of the queue management subsystem 200;

·The port adaptation module 330 of the message editing subsystem 300 works.

The working sequence of the above modules is:

Flow identification module 110 → frame mark determination module 120 → QCI flow control module 210 → flow copy module 220 → port adaptation module 330.

When the device is the intermediate starting point of the 802.1CB network and there are multiple adjacent post-sequence nodes and multiple adjacent pre-sequence nodes, the entry of the flow ID of the first 802.1 frame is configured as: starting point The mark is 0, the end mark is 0, and the frame elimination enable mark is 1.

The relevant 802.1CB frame tag of the first 802.1 frame is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110, the frame mark determination module 120 and the frame elimination module 130 of the message forwarding subsystem 100 work

·The QCI flow control module 210 and flow replication module 220 of the queue management subsystem 200 work;

·The port adaptation module 330 of the message editing subsystem 300 works.

The working sequence of the above modules is:

Flow identification module 110 → frame mark determination module 120 → frame elimination module 130 → QCI flow control module 210 → flow copy module 220 → port adaptation module 330.

When the device is an intermediate node of the 802.1CB network and there are multiple adjacent post-sequence nodes and one adjacent pre-sequence node, the entry of the flow ID of the first 802.1 frame is configured as: starting point mark is 0, the end mark is 0, and the frame elimination enable mark is 1.

The relevant 802.1CB frame tag of the first 802.1 frame is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110, frame mark determination module 120, frame elimination module 130 and forwarding module 140 of the message forwarding subsystem 100 work;

·The QCI flow control module 210 of the queue management subsystem 200 works;

·The port adaptation module 330 of the message editing subsystem 300 works.

The working sequence of the above modules is:

Flow identification module 110 → frame mark determination module 120 → frame elimination module 130 → forwarding module 140 → QCI flow control module 210 → port adaptation module 330.

When the device is the end node of the 802.1CB network and there are multiple adjacent subsequent nodes, the entry of the flow ID of the first 802.1 frame is configured as follows: the starting point is marked as 0 and the end point is marked as 1 , the frame elimination enable flag is 1.

The relevant 802.1CB frame tag of the first 802.1 frame is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110, frame mark determination module 120, frame elimination module 130 and forwarding module 140 of the message forwarding subsystem 100 work;

·The QCI flow control module 210 of the queue management subsystem 200 works;

·The second frame editing module 320 and the port adaptation module 330 of the message editing subsystem 300 work.

The working sequence of the above modules is:

Flow identification module 110→frame mark determination module 120→frame elimination module 130→forwarding module 140→QCI flow control module 210→frame editing second module 320→port adaptation module 330.

When the device is the end node of the 802.1CB network and there is an adjacent subsequent node, the entry of the flow ID of the first 802.1 frame is configured as follows: the start mark is 0, the end mark is 1, Frame erasure enable flag is 0.

The relevant 802.1CB frame tag of the first 802.1 frame is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110, frame mark determination module 120 and forwarding module 140 of the message forwarding subsystem 100 work

·The QCI flow control module 210 of the queue management subsystem 200 works;

·The second frame editing module 320 and the port adaptation module 330 of the message editing subsystem 300 work.

The working sequence of the above modules is:

Flow identification module 110→frame mark determination module 120→forwarding module 140→QCI flow control module 210→frame editing second module 320→port adaptation module 330.

From the above, based on the actual device, the entry of the flow ID of the first 802.1 frame is flexibly configured to control and enable the work of each module of the device, thereby reducing the complexity of implementation and maintenance of the device.

In summary, Embodiment 1 of a device that implements the 802.1CB protocol is based on modular functional settings and takes into account the flow identification, frame elimination and flow replication of 802.1CB and the 802.1QCI flow control in one device; supports the flow control based on the device Flexible configuration of table entries of node locations, thereby controlling the work of each module, reduces the complexity of implementation and maintenance of the device compared to the way in which all modules work together in a device.

[Embodiment 2 of a device for implementing the 802.1CB protocol]

The second embodiment of a device that implements the 802.1CB protocol inherits all the structures of the first device embodiment and adds proxy function-related modules.

Figure 2A shows a network structure applied in Embodiment 2 of a device that implements the 802.1CB protocol. Its nodes include System B, Relay System C, and Relay System D. , Relay System E (Relay System E), Relay System F (Relay System F) and System G (System G), among which System B consists of System B1 (End System B1) and Relay System B2 (System B2) , System G consists of relay system G2 (Relay SystemG2) and system G1 (End System G1).

Among them, relay system B2, relay system C, relay system D, relay system E, relay system F and relay system G2 are devices supporting the 802.1CB protocol in this embodiment. System B1 and system G1 do not support the 802.1CB protocol. To achieve seamless and redundant data transmission from system B1 to system G21, an agent must be set up. Relay system B2 is the agent of system B1, and relay G2 is the agent of system G1.

Figure 2B shows the structure of Embodiment 2 of a device for implementing the 802.1CB protocol. Compared with the first embodiment of the device, there are the following changes:

In some practical scenarios, the entry configuration subsystem 400 is enhanced, and a MAC replacement enable flag is added to the entries configured in the configuration module 410.

In some actual scenarios, the message forwarding subsystem 100 adds a DMAC replacement module 150 and enhances the frame mark determination module 120.

In some practical scenarios, the queue management subsystem 200 adds a DMAC information determination module 240.

In some actual scenarios, the message editing subsystem 300 adds a DMAC information replacement module 340.

The functions and advantages of other modules are the same as those in the device embodiment 1. Here, the new modules and enhanced modules are focused on.

As shown in Figure 2A, when G2 serves as a proxy for the 802.1CB protocol of G1, G2 usually has a MAC address replacement function, and the device is enhanced as follows.

The message forwarding subsystem 100 adds a DMAC replacement module 150, which is used to replace the first 802.1 frame when the device is the end node of the 802.1CB network and serves as the proxy node of the 802.1CB protocol of the external second destination node. Replace the destination MAC address with the MAC address of the second destination node.

For example, relay system G 2 in Figure 2A is the agent node of system G1, and G1 is the second destination node. When the relay system G 2 has the MAC replacement function, the relay system G 2 performs MAC address replacement and replaces the destination MAC address of the first 802.1 frame with the MAC address of the system G1 to continue data forwarding.

As shown in Figure 2A, when G2 serves as the agent of G1's 802.1CB protocol, G2 does not have the MAC address replacement function. The subsequent nodes of G2, such as E and F, are usually selected for MAC address replacement. The device is enhanced as follows.

The configuration module 410 adds a configuration MAC replacement enable flag when the device is an intermediate node of the 802.1CB network, and the 802.1CB network is the proxy node of the 802.1CB protocol of the external second destination node and does not have the MAC replacement function. , add a configuration MAC replacement enable flag to the entry corresponding to the flow ID of the first 802.1 frame.

For example, relay system G 2 in Figure 2A is the agent node of system G1, and G1 is the second destination node. However, relay system G 2 does not have the MAC replacement function. If MAC replacement is completed in relay systems E and F, then Add a configuration MAC replacement enable flag to the entry corresponding to the flow ID of the first 802.1 frame in relay systems E and F.

The frame mark determination module 120 is further configured to query the forwarding control table for the MAC replacement enable mark in the entry corresponding to the Key of the first 802.1 frame based on the Key of the first 802.1 frame, and determine it to be the first 802.1 frame. A MAC replacement enable flag for an 802.1 frame.

For example, relay system G 2 in Figure 2A is the agent node of system G1, and G1 is the second destination node. However, relay system G 2 does not have the MAC replacement function. If MAC replacement is completed in relay systems E and F, then The frame mark determination module 120 of the relay system E queries the forwarding control table of the relay system E based on the flow ID of the first 802.1 frame for the MAC replacement enable flag in the entry corresponding to the flow ID, and determines as The MAC replacement enable flag of the first 802.1 frame. The relay system F also performs the same operation.

The DMAC information determination module 240 is configured to determine the DMAC information arriving at the second destination MAC based on the flow ID of the first 802.1 frame when the MAC replacement enable flag is 1; the DMAC information at least includes the first The second destination MAC address, the priority of the transmission packet and the VLAN to reach the second destination MAC.

For example, relay system G 2 in Figure 2A is the agent node of system G1, and G1 is the second destination node. However, relay system G 2 does not have the MAC replacement function. If MAC replacement is completed in relay systems E and F, then When the MAC replacement enable flag of relay node E is 1, the DMAC information determination module 240 of relay system E queries the DMAC table based on the flow ID of the first 802.1 frame to determine the DMAC information to system G1. . The relay system F also performs the same operation.

The DMAC information replacement module 340 is configured to replace the corresponding information in the first 802.1CB frame with the DMAC information when the MAC replacement enable flag is 1.

For example, the relay system G2 in Figure 2A is the agent node of the system G1, and G1 is the second destination node. However, the relay system G2 does not have the MAC replacement function. If the MAC replacement is completed in the relay systems E and F, then in When the MAC replacement enable flag of node E is 1, the DMAC information replacement module 320 replaces the DMAC information of the first 802.1 frame.

Taking FIG. 2A as an example, the following describes the work enabling status of each module of the second embodiment of the device based on actual usage scenarios. Because relay system B2, relay system C, relay system D, relay system E, relay system F and relay system G2 are modules related to the 802.1CB protocol, that is, nodes of the 802.1CB network. These nodes will be introduced below. module configuration.

Relay system B2 is the start node of the 802.1CB network, and has two adjacent pre-sequence nodes, namely relay systems C and D. The entry of the flow ID of the first 802.1 frame is configured as: start mark is 1, the end mark is 0, and the frame elimination enable mark is 0.

The relevant 802.1CB frame tag of the first 802.1 frame is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110 and the frame mark determination module 120 of the message forwarding subsystem 100 work;

·The QCI flow control module 210, flow copy module 220 and frame sequence number generation module 230 of the queue management subsystem 200 work;

·The first frame editing module 310 and the port adaptation module 330 of the message editing subsystem 300 work.

The working sequence of the above modules is:

Flow identification module 110 → frame mark determination module 120 → QCI flow control module 210 → flow copy module 220 → frame sequence number generation module 230 → frame editing first module 310 → port adaptation module 330.

Relay system C is an intermediate node of the 802.1CB network, with one adjacent post-sequence node and 2 adjacent pre-sequence nodes. The entry of the flow ID of the first 802.1 frame is configured as: the starting point is marked as 0, the end mark is 0, and the frame elimination enable mark is 0.

The relevant 802.1CB frame mark of the first 802.1 frame of relay system C is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110 and the frame mark determination module 120 of the message forwarding subsystem 100 work;

·The QCI flow control module 210 and flow replication module 220 of the queue management subsystem 200 work;

·The port adaptation module 330 of the message editing subsystem 300 works.

The working sequence of the above modules is:

Flow identification module 110 → frame mark determination module 120 → QCI flow control module 210 → flow copy module 220 → port adaptation module 330.

Relay system D is an intermediate node of the 802.1CB network, with one adjacent post-sequence node and 1 adjacent pre-sequence node. The entry of the flow ID of the first 802.1 frame is configured as: the starting point is marked as 0, the end mark is 0, and the frame elimination enable mark is 0.

The relevant 802.1CB frame mark of the first 802.1 frame of relay system D is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110 and the frame mark determination module 120 of the message forwarding subsystem 100 and the forwarding module 140 work;

·The QCI flow control module 210 of the queue management subsystem 200 works;

·The port adaptation module 330 of the message editing subsystem 300 works.

The working sequence of the above modules is:

Flow identification module 110 → frame mark determination module 120 → forwarding module 140 → QCI flow control module 210 → port adaptation module 330.

Relay system E, relay system F and relay system G2 are configured in two situations, that is, G2 has the MAC replacement function and does not have the MAC replacement function.

Relay system E is an intermediate node of the 802.1CB network. It has an adjacent post-sequence node and an adjacent pre-sequence node, and the pre-sequence node relay system G2 has a MAC replacement function. The relay system E is the above-mentioned The intermediate node of the 802.1CB network has an adjacent post-sequence node and an adjacent pre-sequence node. The entry of the flow ID of the first 802.1 frame is configured as follows: the starting point is marked as 0, the end point is marked as 0, Frame erasure enable flag is 0.

The relevant 802.1CB frame mark of the first 802.1 frame of relay system E is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110 and the frame mark determination module 120 of the message forwarding subsystem 100 and the forwarding module 140 work;

·The QCI flow control module 210 of the queue management subsystem 200 works;

·The port adaptation module 330 of the message editing subsystem 300 works.

The working sequence of the above modules is:

Flow identification module 110 → frame mark determination module 120 → forwarding module 140 → QCI flow control module 210 → port adaptation module 330.

Relay system E is the intermediate node of the 802.1CB network, with one adjacent post-sequence node and 1 adjacent pre-sequence node, and the pre-sequence node relay system G2 does not have the MAC replacement function because G2 does not have MAC replacement. function, the relay system E needs to configure the MAC replacement function. The entry of the flow ID of the first 802.1 frame is configured as follows: the starting point is marked as 0, the end point is marked as 0, the frame elimination enable mark is 0, and the MAC replacement is enabled. can be marked as 1.

The relevant 802.1CB frame mark of the first 802.1 frame of relay system E is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

Its module configuration is as follows:

·The flow identification module 110, frame mark determination module 120 and forwarding module 140 of the message forwarding subsystem 100 work;

·The QCI flow control module 210 and the DMAC information determination module 240 of the queue management subsystem 200 work;

·The port adaptation module 330 and the DMAC information replacement module 340 of the message editing subsystem 300 work.

The working sequence of the above modules is:

Flow identification module 110 → frame mark determination module 120 → forwarding module 140 → QCI flow control module 210 → DMAC information determination module 240 → port adaptation module 330 → DMAC information replacement module 340.

Relay system F is an intermediate node of TSN's 802.1CB network and has two adjacent post-sequence nodes and one adjacent pre-sequence node, and the pre-sequence node relay system G2 has a MAC replacement function. The first 802.1 frame The entry of the flow ID is configured as follows: the start point is marked as 0, the end point is marked as 0, and the frame elimination enable mark is 1.

The relevant 802.1CB frame tag of the first 802.1 frame of relay system F is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110, frame mark determination module 120, frame elimination module 130 and forwarding module 140 of the message forwarding subsystem 100 work;

·The QCI flow control module 210 of the queue management subsystem 200 works;

·The port adaptation module 330 of the message editing subsystem 300 works.

The working sequence of the above modules is:

Flow identification module 110 → frame mark determination module 120 → frame elimination module 130 → forwarding module 140 → QCI flow control module 210 → port adaptation module 330.

Relay system F is the intermediate node of TSN's 802.1CB network and has two adjacent post-sequence nodes and one adjacent pre-sequence node, and the pre-sequence node relay system G2 does not have the MAC replacement function because G2 does not have MAC replacement. function, relay system E needs to configure the MAC replacement function. The entry of the flow ID of the first 802.1 frame is configured as follows: the starting point is marked as 0, the end point is marked as 0, the frame elimination enable mark is 1, and the MAC replacement enable can be marked as 1.

The relevant 802.1CB frame tag of the first 802.1 frame of relay system F is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110, frame mark determination module 120, frame elimination module 130 and forwarding module 140 of the message forwarding subsystem 100 work;

·The QCI flow control module 210 and the DMAC information determination module 240 of the queue management subsystem 200 work;

·The port adaptation module 330 and the DMAC information replacement module 340 of the message editing subsystem 300 work.

The working sequence of the above modules is:

Flow identification module 110→frame mark determination module 120→frame elimination module 130→forwarding module 140→QCI flow control module 210→DMAC information determination module 240→port adaptation module 330→DMAC information replacement module 340.

When the relay system G2 is the end node of TSN's 802.1CB network, has two adjacent subsequent nodes, and has the MAC replacement function, the entry of the flow ID of the first 802.1 frame is configured as: the starting point is marked as 0, the end mark is 1, and the frame elimination enable mark is 1.

The relevant 802.1CB frame mark of the first 802.1 frame of the relay system G2 is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows:

·The flow identification module 110, frame mark determination module 120, frame elimination module 130, forwarding module 140 and DMAC replacement module 150 of the message forwarding subsystem 100 work;

·The QCI flow control module 210 of the queue management subsystem 200 works;

·The second frame editing module 320 and the port adaptation module 330 of the message editing subsystem 300 work.

The working sequence of the above modules is:

Flow identification module 110→frame mark determination module 120→frame elimination module 130→DMAC replacement module 150→forwarding module 140→QCI flow control module 210→frame editing second module 320→port adaptation module 330.

Relay system G2 is the terminal node of TSN's 802.1CB network. It has two adjacent subsequent nodes and does not have the MAC replacement function. The MAC replacement function is completed in relay systems E and F. All of the first 802.1 frames are The entry configuration of the flow ID is as follows: the start mark is 0, the end mark is 1, the frame elimination enable mark is 1, and the MAC replacement enable mark is 1.

The relevant 802.1CB frame mark of the first 802.1 frame of the relay system G2 is determined based on the entry of the flow ID, thereby enabling the working conditions of each module to be as follows. Its module configuration is as follows:

·The flow identification module 110, frame mark determination module 120, frame elimination module 130 and forwarding module 140 of the message forwarding subsystem 100 work;

·The QCI flow control module 210 and the DMAC information determination module 240 of the queue management subsystem 200 work;

·The second frame editing module 320, port adaptation module 330 and DMAC information replacement module 340 of the message editing subsystem 300 work.

The working sequence of the above modules is: flow identification module 110 → frame mark determination module 120 → frame elimination module 130 → forwarding module 140 → QCI flow control module 210 → DMAC information determination module 240 → frame editing second module 320 → port adaptation Module 330→DMAC information replacement module 340.

The devices in this embodiment can also be stacked to expand the switching capabilities of the 802.1CB protocol. Each front-end device in each stack is configured with a forwarding module 140, and each module of the back-end device is configured based on the scenario according to the above scenario module.

In summary, Embodiment 2 of a device that implements the 802.1CB protocol is based on modular functional settings and takes into account the flow identification, frame elimination, flow replication, 802.1QCI flow control and 802.1CB proxy functions of 802.1CB on one device; Supports flexible configuration entries based on the node locations of the device, thereby controlling the work of each module. Compared with the way in which all modules work together in a device, the complexity of implementation and maintenance of the device is reduced.

[Detailed implementation of the second embodiment of a device for implementing the 802.1CB protocol]

Figure 3 shows the structure of a specific implementation device of Embodiment 2 of a device that implements the 802.1CB protocol.

The specific implementation also includes the table configuration system 400, because in the specific implementation, the control signals between each subsystem are introduced in detail, and the configuration system 400 is not shown in Figure 3.

The specific implementation is based on the exchange of control signals. The message forwarding subsystem 100 is divided into an ACL module 100A, a forwarding module 100B and a control encapsulation module 100C. The queue management subsystem 200 is divided into a queue management module 200A and a queue management module. Module 200B.

The ACL module 100A includes a flow identification module 110, a frame mark determination module 120, a frame elimination module 130, and a DMAC replacement module 150. The forwarding module 100B includes a forwarding module 140. The control encapsulation module 100C includes a newly added frame mark first encapsulation module 160. Except for the new frame mark first encapsulation module 160, for descriptions of other modules, refer to the first device embodiment or the second device embodiment.

The first frame mark encapsulation module 160 is used to encapsulate stream_hdl, frm_repl_ori, frm_elim_term, seq_strt, and alt_en in the first frame mark control block, and pass it to the queue management subsystem 200.

Among them, the first control block of the frame mark corresponds to the first 802.1 frame mentioned above, stream_hdl is the stream ID, frm_repl_ori is the starting point mark, frm_elim_term is the end mark, and seq_strt is the sequence number start mark. , alt_en is the MAC replacement enable tag as alt_en.

Among them, the frame marking first encapsulation module 160 is a must-select module in any actual scenario, working after other modules listed in the message forwarding subsystem 100 in the device embodiment of the present invention.

The enqueue management module 200A includes a QCI flow control module 210, a flow copy module 220, and a first frame mark decapsulation module 250. The dequeue management module 200B includes a frame sequence number generation module 230, a DMAC information determination module 240, and a second frame mark encapsulation module. 260 and frame marking third encapsulation module 270.

The first frame mark decapsulation module 250 is used to decapsulate stream_hdl, frm_repl_ori and seq_strt from the frame mark first control block, and pass them to the queue management module 200B for use in the frame sequence number generation module 230 and the DMAC information determination module 240.

Among them, the frame mark first decapsulation module 250 is a must-select module in any actual scenario, working before other modules listed in the queue management subsystem module 200 of the device embodiment of the present invention.

The frame mark second encapsulation module 260 is used to encapsulate the 802.1CB frame sequence number of the first 802.1 frame with stream_hdl and the frm_repl_ori and frm_elim_term in the 802.1CB frame mark in the frame when the frm_repl_ori of the first 802.1 frame is 1. Mark the second control block to pass to the message editing subsystem 300.

The third frame mark encapsulation module 270 is used to encapsulate the DMAC information, stream_hdl and frm_repl_ori and frm_elim_term in the 802.1CB frame mark in the second control block of the frame mark when alt_en of the first 802.1 frame is 1, to pass it to the message editing subsystem 300.

Among them, in actual scenarios, frm_repl_ori and alt_en are not set to 1 at the same time, and the frame mark second encapsulation module 260 and the frame mark third encapsulation module 270 are two modules to choose from.

Among them, the second frame mark encapsulation module 260 or the third frame mark encapsulation module 270 works after other modules listed in the queue management subsystem module 200 of the device embodiment of the present invention. The second frame mark encapsulation module 260 is enabled to work together with the frame sequence number generation module 230, and the third frame mark encapsulation module 270 is enabled to work together with the DMAC information determination module 240.

The message editing subsystem 300 adds a second decapsulation module 350 for frame marking.

The second frame mark decapsulation module 350 is used to parse out the stream_hdl, frm_repl_ori, frm_elim_term and alt_en of the first 802.1 frame from the received frame mark second control block; and is also used to extract the stream_hdl, frm_repl_ori, frm_elim_term and alt_en from the frame mark when frm_repl_ori is 1. The second control block parses out the 802.1CB frame sequence number, and sends the 802.1CB frame sequence number, frm_repl_ori and stream_hdl to the first frame editing module 310; it is also used to send frm_elim_term and stream_hdl to the second frame editing module when frm_elim_term is 1. 320; Also used to parse the DMAC information from the second control block of the frame mark when alt_en is 1, and send the DMAC information and alt_en to the DMAC information replacement module 340.

Among them, the frame mark second decapsulation module 350 is a necessary module in any actual scenario, and works before other modules listed in the message editing subsystem module 300 of the device embodiment of the present invention.

The working scenarios of each module in this specific implementation mode refer to the second embodiment of the device, and will not be described in detail here.

In addition, Figure 3 only shows the processing part of the 802.1CB protocol function, flow control and proxy function of the device. In actual usage scenarios, the device in this embodiment also includes a frame receiving interface and a frame sending interface.

The frame receiving interface is used to receive the first 802.1 frame from an adjacent subsequent node. When the subsequent node is a node of the 802.1CB network, the first 802.1 frame received is an 802.1CB frame. When the subsequent node is an external node of the 802.1CB network, the first 802.1 frame received is an 802.1 standard frame.

The frame sending interface is used to send the first 802.1 frame to an adjacent pre-sequence node. When the pre-sequence node is a node of the 802.1CB network, what is sent is an 802.1CB frame. When the pre-sequence node When the sequence node is an external node of the 802.1CB network, what is sent is an 802.1 standard frame.

In summary, the specific implementation method of the second embodiment of a device for implementing the 802.1CB protocol is based on modular function settings and a unified control block to transmit various control information, taking into account the flow identification, frame elimination, flow replication, etc. of 802.1CB. With the functions of QCI flow control and 802.1CB proxy, the interfaces between subsystems are simpler, further reducing the complexity of implementation and maintenance of the device.

[A chip implementation implementing the 802.1CB protocol]

The present invention also provides a chip embodiment for implementing the 802.1CB protocol, which has the modules described in the second embodiment of a device for implementing the 802.1CB protocol. It implements the functions of 802.1CB flow identification, frame elimination, flow replication, QCI flow control and 802.1CB proxy on one chip, supports flexible configuration of entries based on the actual node location of the device, and adapts to various actual uses. scenarios to reduce the complexity of chip implementation and maintenance.

Note that the above are only the preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, it can also include more other equivalent embodiments, all of which belong to the present invention. Scope of invention protection.

Claims (10)

1. An apparatus for implementing an 802.1CB protocol, comprising:

A message forwarding subsystem for determining a stream ID and an 802.1CB frame flag of the received first 802.1 frame; and further for enabling elimination of redundant frames based on the 802.1CB frame flag; the 802.1CB frame flag is obtained from a forwarding control table of the device from the flow ID, the forwarding control table being configured based on a location of the device in an 802.1CB network, comprising one or more of the following flags: a start point mark, an end point mark, a frame elimination enabling mark and a protocol mark starting mark, wherein each table entry of the forwarding control table comprises a corresponding stream ID and an 802.1CB frame mark;

a queue management subsystem for performing flow control of 802.1QCI protocol on the first 802.1 frame based on the flow ID; further for the apparatus enabling replication of the first 802.1 frame to a plurality of forwarding ports based on the flow ID when there are a plurality of preamble neighbors in an 802.1CB network and the end point flag is not valid; further for enabling and controlling the generation of a flag of an 802.1CB protocol of the first 802.1 frame based on the 802.1CB frame flag for changing the first 802.1 frame to an 802.1CB frame;

a message editing subsystem, configured to enable and control adding a flag of an 802.1CB protocol to the first 802.1 frame based on the 802.1CB frame flag, so that the first 802.1 frame after the adding is identified as an 802.1CB frame, or configured to enable and control deleting a flag of an 802.1CB protocol from the first 802.1 frame based on the 802.1CB frame flag, so that the first 802.1 frame is changed from an 802.1CB frame to a standard frame of a first 802.1 after the deleting; and the first 802.1 frame is further used for adapting based on a forwarding port so as to be sent outwards.

2. The apparatus of claim 1, further comprising an entry configuration subsystem to configure an entry in a forwarding control table of the apparatus indexed by a Key of the first 802.1 frame based on a location of the apparatus in an 802.1CB network; the Key of the first 802.1 frame at least comprises a combination of the VLAN ID of the first 802.1 frame and a source MAC or a destination MAC.

3. The apparatus of claim 2, wherein the message forwarding subsystem comprises:

a flow identification module for determining a flow ID of the first 802.1 frame based on a Key of the first 802.1 frame;

a frame mark determining module, configured to query an entry corresponding to the flow ID from the forwarding control table based on the Key of the first 802.1 frame, and determine the Key as a relevant mark in an 802.1CB frame mark of the first 802.1 frame;

a frame elimination module, configured to delete a second 802.1 frame in the first 802.1 frame when a frame elimination enable flag in the 802.1CB frame flag is valid; the second 802.1 frame is a non-first arriving frame of the first 802.1 frames having the same stream ID and the same 802.1CB frame number.

4. The apparatus of claim 3, wherein the queue management subsystem comprises:

The flow control module is used for determining flow control information of the first 802.1 frame based on the flow ID of the first 802.1 frame and implementing flow control according to the flow control information;

the stream copying module is used for determining a forwarding port and control information of the forwarding port based on the stream ID of the first 802.1 frame, copying the first 802.1 frame to each forwarding port and sending the port control information to the message editing system;

a generating module, configured to generate a flag of the 802.1CB protocol of the first 802.1 frame based on the protocol flag start flag when a start flag in the 802.1CB frame flag is valid; the flag of the 802.1CB frame includes an 802.1CB frame number.

5. The apparatus of claim 4, wherein the message editing subsystem comprises:

a frame editing module, configured to insert a flag of the 802.1CB protocol for the first 802.1 frame when a start flag in the 802.1CB frame flag is valid; or a flag for deleting the 802.1CB protocol from the first 802.1 frame when the end point flag is valid;

and the port adaptation module is used for carrying out transmission adaptation on the first 802.1 frame based on the forwarding port thereof so as to send the first 802.1 frame outwards.

6. The apparatus of claim 3 wherein said message forwarding subsystem further comprises a frame tag first encapsulation module for encapsulating a flow ID of said first 802.1 frame and a start tag, an end tag, and a frame sequence number start tag in said 802.1CB frame tag in a frame tag first control block for transmission to said queue management subsystem.

7. The apparatus of claim 4, wherein the queue management subsystem further comprises a frame tag second encapsulation module for encapsulating the tag of the 802.1CB protocol of the first 802.1 frame, the stream ID, and the start and end tags of the 802.1CB frame tag in a frame tag second control block for transmission to the message editing subsystem when the start tag of the 802.1CB frame tag is valid.

8. The apparatus of any one of claims 3 to 5, wherein when the end node of the 802.1CB network in which the apparatus is located is an 802.1CB protocol proxy node of an external second destination node and the end node does not have a MAC replacement function,

the table item configuration subsystem is further used for configuring MAC replacement enabling marks in the table items of the forwarding control table of the device;

the frame mark determining module is further configured to query a MAC replacement enabling mark in a corresponding entry from the forwarding control table based on the Key of the first 802.1 frame, and determine the MAC replacement enabling mark as the MAC replacement enabling mark of the first 802.1 frame;

the queue management subsystem further includes a DMAC information determination module for determining DMAC information for the second destination node based on a stream ID of the first 802.1 frame when the MAC replacement enable flag is valid; the DMAC information at least comprises the MAC address of the second destination node, the flow priority of the transmission message and the VLAN reaching the second destination node;

The message editing subsystem further comprises a DMAC information replacing module, which is used for replacing corresponding information in the first 802.1 frame with the DMAC information when the MAC replacement enabling mark is valid.

9. The apparatus of claim 8, wherein the queue management subsystem further comprises a frame tag third encapsulation module for encapsulating DMAC information of the second destination node, the stream ID, and start and end tags in the 802.1CB frame tag in a frame tag second control block for transmission to the message editing subsystem when the MAC replacement enable flag is active.

10. A chip implementing the 802.1CB protocol, comprising the apparatus of any of claims 1 to 9.