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CN100466590C - A method for V_Switch to transparently transmit data to realize load sharing - Google Patents

A method for V_Switch to transparently transmit data to realize load sharing Download PDF

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Publication number
CN100466590C
CN100466590C CNB2007100866150A CN200710086615A CN100466590C CN 100466590 C CN100466590 C CN 100466590C CN B2007100866150 A CNB2007100866150 A CN B2007100866150A CN 200710086615 A CN200710086615 A CN 200710086615A CN 100466590 C CN100466590 C CN 100466590C
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CN
China
Prior art keywords
switch
interface
message
vlan label
load sharing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB2007100866150A
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Chinese (zh)
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CN101030915A (en
Inventor
杨扬
曲原
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ZTE Corp
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ZTE Corp
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Publication of CN101030915A publication Critical patent/CN101030915A/en
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Publication of CN100466590C publication Critical patent/CN100466590C/en
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Abstract

本发明提出了一种V_Switch透传数据实现负荷分担的方法，V_Switch设备对其入接口收到的报文进行处理，从其出接口转发出带有VLAN标签的报文和不带有VLAN标签的报文；实接口对所述不带有VLAN标签的报文进行处理，终结接口对所述带有VLAN标签的报文进行终结处理，去除VLAN标签；对已经终结的报文进行三层的路由查找，判断是否需要进行负荷分担处理，如果需要，则进行负荷分担处理。本发明实现了V_Switch模块和负载均衡模块之间的交互。

The present invention proposes a method for V_Switch to transparently transmit data to realize load sharing. The V_Switch device processes the messages received by its ingress interface, and forwards the messages with VLAN tags and messages without VLAN tags from its output interface. message; the real interface processes the message without the VLAN tag, and the termination interface terminates the message with the VLAN tag to remove the VLAN tag; performs three-layer routing on the terminated message Search to determine whether load sharing processing is required, and if necessary, load sharing processing is performed. The invention realizes the interaction between the V_Switch module and the load balancing module.

Description

A kind of V_Switch transparent data is realized the method for load sharing
Technical field
The present invention relates to virtual switch in the network service (V_Switch) technical field, relate in particular to the method that a kind of V_Switch transparent data is realized load sharing.
Background technology
Network has become necessary tool in people's routine work and the life, has much in the method for the enterprising line data of network transmission, and is the most widely used exactly based on the hop-by-hop message forward mode of route, just the IP pass-through mode.
In OSI (inventionthe open systems) model, the processing of transmitting for IP is defined within the 3rd layer, IP stashes physical address, the Internet begins to show as unified address format from the IP layer, each above layer of IP layer all uses the IP address, and original separately physical address is still used in physical network inside.Specifically, for an Ethernet, the equipment among the LAN is by L2 address, and promptly MAC Address is set up communication, when different LAN wishes to connect each other, just need finish by IP.What specifically bear this task in network is exactly router.
In most cases, what router was born is three layers of forwarding task, but exception is also arranged in some cases.Such as in " router+BAS Broadband Access Server (BAS) " this networking mode, router has dual identity.First kind of identity is to finish convergence, and other business such as access (VPN), QoS, NAT, multicast of big customer are provided, and at this moment the router task of bearing still is three layers a data forwarding.Second kind of identity is that peer-peer protocol (PPPoE) packet based on Ethernet link is transmitted to BAS equipment, because the PPPoE packet itself is a two layer message, can't search three layers of IP during forwarding, so this moment, router must serve as two layers of transparent transmission equipment, for this reason, this mode of V_Switch is applied on the router.
The essence of V_Switch technology is that the message that interface is received is carried out the replacement of VLAN ID, is two layers of forwarding in essence, any change is not done in the IP address.After having set up V_Switch and transmitting, all enter the packet of V_Switch interface and all transmit processing according to V_Switch, and this mode is very effective to the processing of PPPoE packet.The packaged type of PPPoE data, be with peer-peer protocol (PPP) data encapsulation in the expense (payload) of Ethernet head, the reason of Chu Liing like this is in order to solve the problem of transmission PPP information bag under ethernet environment.For the such equipment of router, do not go to discern the expense in the Ethernet frame, just simply message is forwarded on the BAS, at this moment, the message that arrives BAS has been the packet of a PPPoE, perhaps also can V_Switch be replaced later VLAN ID and Ethernet by BAS equipment and peel off, processing then authenticates, charges or the like.
The equipment that the function of V_Switch also can make the router downlink and uplink interfaces connect is simultaneously realized the intercommunication of different vlan domains, but because two interfaces of router are two layers of transparent transmission interfaces at this moment, so can not realize being in the communication of the equipment of the different IP network segment, also, can not realize three layer functions that load balancing is such by the V_Switch transparent data just because of not transmitting according to three layers of IP.
Summary of the invention
The present invention proposes the method that a kind of V_Switch transparent data is realized load sharing, can solve the problem that can not realize such three layer functions of load balancing in the V_Switch repeating process.
For this reason, the present invention takes following technical scheme:
A kind of V_Switch transparent data is realized the method for load sharing, may further comprise the steps:
The message that A, V_Switch equipment are received its incoming interface is handled, and transfers message that has the VLAN label and the message that does not have the VLAN label from its outgoing interface;
B, termination interface carry out finalization process to the message of the described VLAN of having label, remove the VLAN label;
C, message that does not have the VLAN label and the message of having removed the VLAN label are carried out three layers route querying, judge whether to carry out load sharing processing, if desired, then carry out load sharing processing.
Wherein, the interface of termination described in the step B carries out finalization process to the message of the described VLAN of having label and further may further comprise the steps:
The interface of B1, use and described V_Switch outgoing interface same type disposes sub-interface as the termination interface on described termination interface, packaging V LAN label, and described VLAN label is identical with the VLAN label that corresponding V_Switch outgoing interface sends;
B2, use cable to connect described V_Switch outgoing interface and described termination interface on identical router;
B3, on described sub-interface configuration of IP address, the network segment of use is identical with the network segment that described V_Switch incoming interface is inserted;
B4, the VLAN label that described V_Switch outgoing interface is sent to the message of described termination interface mate, if correct, then remove the VLAN label, otherwise abandon described message.
Steps A further may further comprise the steps:
A1, definition V_Switch transmit, and carry out related with VLAN label Substitution Rules interface;
After A2, V_Switch equipment incoming interface are received described message, after the forward mode of checking described incoming interface is the V_Switch pattern, enter steps A 3, otherwise enter other pass-through mode flow processs;
After A3, the described message of judgement are the IP bag, enter steps A 4, otherwise enter other pass-through mode flow processs;
A4, microcode are searched described V_Switch and are transmitted, and judge that described message can mate, and enter steps A 5, otherwise enter steps A 6;
A5, judge whether described message VLAN label after transmitting is 0, if, then remove the VLAN label, if not, the VLAN label in then transmitting with described V_Switch encapsulates described message;
A6, microcode check whether the forward mode of interface is mixed mode, if, then enter other pass-through mode flow processs, if not, then abandon described message.
Step C is further comprising the steps of:
If do not need to carry out load sharing processing, described message carries out three layers of conventional forwarding to be handled.
Adopted technical scheme of the present invention, the V_Switch transparent data can be realized three layer functions that load balancing is such.
Description of drawings
Fig. 1 is the V_Switch schematic network structure;
Fig. 2 is the flow chart that the V_Switch transparent data is realized load sharing in this embodiment.
Embodiment
Below in conjunction with accompanying drawing, and technical scheme of the present invention is described further by embodiment.
In order to allow data also can realize load balancing in the V_Switch repeating process, primary target is exactly to make V_Switch equipment can discern three-tier message when transmitting.This equipment comprises two layers of transparent transmission module of V_Switch of carrying out the V_Switch forwarding, and can finish flow balanced load balancing module of distributing on link.These two modules realize on router, but because affiliated network layer difference, can not set up direct contact between mutually.So need set up a new mechanism that connects these two functions, be about to transfer to the module of three layers of processing through the data of two layers of forwarding.
Fig. 1 is the V_Switch schematic network structure.As shown in Figure 1, the effect of V_Switch equipment in this networking is exactly to increase a VLAN ID outside the IP packet header that main frame sends, and is forwarded to the network equipment 1 or the network equipment 2 then.Illustrate, the network equipment 1 here can be a BAS equipment, main frame can be a PPPoE user, in this network, do not add switch, be not with VLAN ID so deliver to the message of V-Switch equipment on the main frame, through delivering to the network equipment 1, i.e. BAS device authentication after the V_Switch conversion.
Fig. 2 is the flow chart that the V_Switch transparent data is realized load sharing in this embodiment.As shown in Figure 2, this flow process may further comprise the steps:
Step 101 has defined interface for to transmit the interface of forwarding according to V_Switch, has promptly defined V_Switch and transmit on equipment, and interface and VLAN ID Substitution Rules are associated together;
Step 102, message enter after the V_Switch interface, at first check the forward mode of interface, if the V_Switch pattern then enters step 103, otherwise enter the flow process of other pass-through mode;
Step 103 judges that the bag that enters the V_Switch interface is the IP bag, if then continue step 104, if not (for example being the MPLS bag), the flow process that then enters other pass-through mode;
Step 104, microcode begin to search the V_Switch that has set up to be transmitted, to judge whether and can handle according to transmitting.If message can then be entered step 105 by on the coupling, if can not then be entered step 106 by on the coupling;
Step 105, judge by V_Switch transmit wrapping in of matching transmit after VLAN ID whether should be 0, if, then remove VLANID, go to step 111, if not, then, go to step 107 with new VLAN ID encapsulated data packet in transmitting;
Step 106, microcode can continue to check whether the forward mode of interface is the MIX pattern, if, then adopt other forward mode, if not, packet discard then;
Step 107, use with the interface of V_Switch outgoing interface same type as the VLAN interface that terminates, dispose sub-interface thereon, packaging V LAN ID, the VLAN label that sends with corresponding V_Switch outgoing interface is identical;
Step 108,, use corresponding cable connection V_Switch outgoing interface and termination interface on identical router;
Step 109, configuration of IP address on this sub-interface uses the network segment identical with the network segment that the V_Switch incoming interface is inserted,
And the like, under a plurality of VLAN label condition that need simultaneously to terminate, can under identical termination interface, dispose corresponding a plurality of sub-interfaces, because the isolation of VLAN, these messages can not be affected mutually;
Step 110, the packet of sending up for the V_Switch outgoing interface is done the matching operation of VLAN ID, delivers to the message whether packet of termination interface should receive in the judgement, if corresponding VLANID is correct, then with its removal, otherwise abandons;
Step 111 is carried out three layers route querying to the packet of the VLAN label that terminates, and judges that whether this message needs to carry out load sharing processing, need then enter step 112, otherwise enter step 113;
Step 112, if the result who obtains according to three layers of forwarding lookup is that this flow needs load sharing, then corresponding corresponding load sharing processing method is handled flow;
Step 113 if the result who obtains according to three layers of forwarding lookup is that this flow does not need load sharing, is then carried out three layers of common forwarding and is handled.
Because equipment to the terminates operation of VLAN message, also can be realized communication even make uplink and downlink device be in the different network segments, interface is equivalent to a gateway because terminate this moment.
This embodiment has realized mutual between V_Switch module and the load balancing module, message arrival upstream plant on the V_Switch transparent transmission can be dropped because carrying different VLANID later on, also can on outgoing interface, realize load balancing simultaneously the message that V_Switch transmits.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (3)

1, a kind of V_Switch transparent data is realized the method for load sharing, it is characterized in that, may further comprise the steps:
A, V_Switch equipment are that the message that virtual switch equipment is received its incoming interface is handled, and transfer from its outgoing interface that to have the VLAN label be the message of virtual local area network tags and the message that does not have the VLAN label;
B, termination interface carry out finalization process to the message of the described VLAN of having label, remove the VLAN label;
C, message that does not have the VLAN label and the message of having removed the VLAN label are carried out three layers route querying, judge whether to carry out load sharing processing, if desired, then carry out load sharing processing;
Wherein, step B further may further comprise the steps:
The interface of B1, use and described V_Switch outgoing interface same type disposes sub-interface as the termination interface on described termination interface, packaging V LAN label, and described VLAN label is identical with the VLAN label that corresponding V_Switch outgoing interface sends;
B2, use cable to connect described V_Switch outgoing interface and described termination interface on identical router;
B3, on described sub-interface configuration of IP address, the network segment of use is identical with the network segment that described V_Switch incoming interface is inserted;
B4, the VLAN label that described V_Switch outgoing interface is sent to the message of described termination interface mate, if correct, then remove the VLAN label, otherwise abandon described message.
2, a kind of V_Switch transparent data according to claim 1 is realized the method for load sharing, it is characterized in that steps A further may further comprise the steps:
A1, definition V_Switch transmit, and carry out related with VLAN label Substitution Rules interface;
After A2, V_Switch equipment incoming interface are received described message, after the forward mode of checking described incoming interface is the V_Switch pattern, enter steps A 3, otherwise enter other pass-through mode flow processs;
After A3, the described message of judgement are the IP bag, enter steps A 4, otherwise enter other pass-through mode flow processs;
A4, microcode are searched described V_Switch and are transmitted, and judge that described message can mate, and enter steps A 5, otherwise enter steps A 6;
A5, judge whether described message VLAN label after transmitting is 0, if, then remove the VLAN label, if not, the VLAN label in then transmitting with described V_Switch encapsulates described message;
A6, microcode check whether the forward mode of interface is mixed mode, if, then enter other pass-through mode flow processs, if not, then abandon described message.
3, a kind of V_Switch transparent data according to claim 1 is realized the method for load sharing, it is characterized in that step C is further comprising the steps of:
If do not need to carry out load sharing processing, described message carries out three layers of conventional forwarding to be handled.
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