CN105933222B

CN105933222B - Loop prevention method based on MSTP in a kind of access PE networking of CE dual homed

Info

Publication number: CN105933222B
Application number: CN201610225020.8A
Authority: CN
Inventors: 童振宇; 马红斌
Original assignee: Fiberhome Telecommunication Technologies Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd
Priority date: 2016-04-12
Filing date: 2016-04-12
Publication date: 2019-01-15
Anticipated expiration: 2036-04-12
Also published as: PH12018501085A1; CL2018001429A1; SG11201804252SA; CN105933222A; WO2017177644A1; MY197858A

Abstract

Loop prevention method based on MSTP in a kind of access PE networking of CE dual homed, it is related to data and IP transmission device field, it includes the first PE and the 2nd PE that CE dual homed, which accesses PE networking, the two passes through pseudo-wire respectively and is connected to the 3rd PE, first PE and the 2nd PE are connected to the first CE, loop prevention method includes: one article of management pseudo-wire of creation between the first PE and the 2nd PE, a virtual interface is respectively created in management pseudo-wire both ends, the virtual interface is added in MSTP bridge, and highest priority is set by MSTP bridge, the minimum value being simultaneously revised as the ID of MSTP bridge and expense in all physical ports；The virtual interface enables MSTP function.The present invention, which can be avoided in the access PE networking of CE dual homed, there is double-layer loop, prevents network paralysis.

Description

Loop prevention method based on MSTP in a kind of access PE networking of CE dual homed

Technical field

The present invention relates to data and IP transmission device field, it is based in particular to a kind of CE dual homed access PE networking The loop prevention method of MSTP.

Background technique

In Layer2 switching network, once loop occur will result in the broadcast storm of message, to occupy whole network Effective bandwidth, cause the paralysis of network.In this case, STP (Spanning is produced to solve double-layer loop Tree Protocol, Spanning-Tree Protocol), then based on STP, produce RSTP (Rapid Spanning Tree Protocol, Rapid Spanning Tree Protocol)；Since RSTP agreement cannot distinguish between VLAN, all messages are transmitted on a link, Lead to inefficiency, so gradually appearing MSTP agreement (Multiple Spanning Tree Protocol, multiple spanning tree association View), which introduces the concept of domain and example on the basis of RSTP, both improves network convergence rate, while also to net Network bandwidth is made full use of.

Existing MSTP be mainly used in Layer2 switching network VLAN (Virtual Local Area Network, virtually Local area network) in model, in IPRAN system, two common layer services be VPLS (virtual Private Lan Service, Virtual Private LAN Service) model, there is also the possibility of double-layer loop for VPLS model.As shown in Figure 1, being CE (Customer Edge, customer edge) dual homed access PE (Provider Edge, the edge device of service provider backbone) networking Schematic diagram of a scenario.CE dual homed accesses PE networking, including the first PE (i.e. PE1) and the 2nd PE (i.e. PE2), the two with the first CE (i.e. CE1) is connected, CE1 connection personal computer (i.e. PC), and PE1 and PE2 also pass through business PW (Pseudo Wire, pseudo-wire) even Meet the 3rd PE (i.e. PE3), the 2nd CE (i.e. CE2) of PE3 connection.But existing VPLS loop prevention method, it not can solve CE dual homed and connect Enter in PE networking and the problem of double-layer loop occur, it is therefore necessary to design a kind of method, solve the above problems.

Summary of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide bases in a kind of access PE networking of CE dual homed In the loop prevention method of MSTP, it can be avoided in the access PE networking of CE dual homed and double-layer loop occur, prevent network paralysis.

To achieve the above objectives, the technical solution adopted by the present invention is that: be based on MSTP in a kind of access PE networking of CE dual homed Loop prevention method, it includes the first PE and the 2nd PE that CE dual homed, which accesses PE networking, and the two passes through pseudo-wire respectively and be connected to the 3rd PE, the One PE and the 2nd PE is connected to the first CE, and loop prevention method includes: one article of management pseudo-wire of creation between the first PE and the 2nd PE, A virtual interface is respectively created in management pseudo-wire both ends, the virtual interface is added in MSTP bridge, and set MSTP bridge to Highest priority, while the ID of MSTP bridge and expense are revised as the minimum value in all physical ports；The virtual interface makes It can MSTP function.

Based on the above technical solution, in active state, VPLS sends a message to MSTP to the management pseudo-wire, MSTP creates corresponding two virtual interfaces according to VPLS ID.

Based on the above technical solution, when managing pseudo-wire and deactivating, DOWN message is sent to MSTP, MSTP is by two A virtual interface is kicked out of from MSTP bridge, deletes two virtual interfaces.

Based on the above technical solution, the virtual interface sends or receives bridge protocol data unit signaling message, And participate in topological calculating.

Based on the above technical solution, when calculating spanning tree, MSTP is by two virtual interfaces and other physical ports Uniformly calculated.

Based on the above technical solution, the virtual interface and other physical ports are in a public and inside life Cheng Shuzhong.

The beneficial effects of the present invention are:

1, a management PW is created between PE1 and PE2, a virtual interface is respectively created in the management both ends PW, by the void Quasi- interface is added in MSTP bridge, sets highest priority for MSTP bridge, while the ID of MSTP bridge and expense being revised as owning Minimum value in physical port, the virtual interface enable MSTP function, mainly CE dual homed access PE networking in, prevent PE1, Double-layer loop between PE2 and CE1, prevents network congestion from paralysing.

2, MSTP protocol mode can also be arranged to RSTP and STP by the present invention, can support various protocols mode, extension The application range of the prior art.

Detailed description of the invention

Fig. 1 is the schematic diagram of a scenario that CE dual homed accesses PE networking in background technique；

Fig. 2 is the schematic diagram of a scenario that CE dual homed of the present invention accesses creative management pseudo-wire in PE networking；

Fig. 3 is virtual interface visioning procedure figure in the present invention.

Appended drawing reference:

The 2nd CE of PE1- the first PE, PE2- the 2nd PE, PE3- the 3rd PE, CE1- the first CE, CE2-.

Specific embodiment

Invention is further described in detail with reference to the accompanying drawings and embodiments.

As shown in Fig. 2, the loop prevention method based on MSTP in the access PE networking of CE dual homed, accesses PE networking for CE dual homed, It includes the first PE (i.e. PE1) and the 2nd PE (i.e. PE2) that CE dual homed, which accesses PE networking, and the two passes through business PW respectively and is connected to third PE (i.e. PE3), PE3 connection the 2nd CE (i.e. CE2), PE1 and PE2 are also connected to the first CE (i.e. CE1), the personal meter of CE1 connection Calculation machine (i.e. CP).Loop prevention method of the invention includes: one management PW of creation between PE1 and PE2, manages the PE1 at the both ends PW At PE2, a virtual interface is respectively created；Two virtual interfaces are added in MSTP bridge, and set highest for MSTP bridge Priority, while the ID of the MSTP bridge and expense are revised as the minimum value in all physical ports, allow two virtual interfaces to make It can MSTP function.

As shown in figure 3, the specific visioning procedure of virtual interface is as follows:

S101. management PW is active down；

The message that S102.VPLS sends creative management PW sends UP message to MSTP to MSTP, i.e. VPLS；

S103.MSTP creates corresponding two virtual interface stpif according to VPLS ID, such as: VPLS ID 100, then two A virtual interface is stpif100, but two virtual interfaces are located at two different stations.The virtual interface is used to send Or BPDU (Bridge Protocol Data Unit, bridge protocol data unit) signaling message is received, and participate in topological calculating.

S104. two virtual interfaces are added in MSTP bridge, virtual interface enables MSTP function.Since VPLS is corresponding It is a management PW between PE1 and PE2, network-side port does not have specific physical port corresponding, and network-side port is corresponding Physical port may change with the variation of topology, so cannot block two virtual interfaces of PE1 and PE2, it is only necessary to hinder CE1 side ports are filled in, that is, prevent loop between CE1, PE1, PE2.Therefore, highest priority, i.e. priority are set by MSTP bridge It is revised as 0, while the ID of bridge and expense where two virtual interfaces are revised as the minimum value in all physical ports, such as: Cist_path_cost (Common and Internal Spanning Tree expense) is 1, cist_priority (Common and Internal Spanning Tree priority) It is less than physical port for 16, cist_port_id (Common and Internal Spanning Tree port id) initial value.In this way, calculating spanning tree When, MSTP uniformly calculates two virtual interfaces and other physical ports.

When needing to manage pseudo-wire and deactivating, DOWN message is sent to MSTP, MSTP is by two virtual interfaces from MSTP bridge In kick out of, delete two virtual interfaces.

The present invention does not support the case where more examples, and all of the port is in example 0, that is, CIST (Common and Internal Spanning Tree, Common and Internal Spanning Tree) in example, all VLAN are also bundled in example 0, described Virtual interface and other physical ports avoid double-layer loop in a CIST, and in CIST example.

The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.

Claims

1. being generated in a kind of edge device PE networking of customer edge CE dual homed link service provider's backbone network based on more The loop prevention method of tree protocol MSTP, it includes the first PE and the 2nd PE that CE dual homed, which accesses PE networking, and the two is connected by pseudo-wire respectively To the 3rd PE, the first PE and the 2nd PE are connected to the first CE, which is characterized in that loop prevention method includes: in the first PE and second A management pseudo-wire is created between PE, management pseudo-wire both ends are respectively created a virtual interface, the virtual interface is added In MSTP bridge, and highest priority is set by MSTP bridge, while the ID of MSTP bridge and expense are revised as all physical ports In minimum value；The virtual interface enables MSTP function；The virtual interface and other physical ports one it is public and In Internal Spanning Tree.

2. the loop prevention method based on MSTP in CE dual homed access PE networking as described in claim 1, it is characterised in that: the pipe Manage pseudo-wire in active state, Virtual Private LAN Service VPLS sends a message to MSTP, and MSTP is according to VPLS ID creation pair Two virtual interfaces answered.

3. the loop prevention method based on MSTP in CE dual homed access PE networking as described in claim 1, it is characterised in that: work as management It when pseudo-wire deactivates, sends DOWN message and kicks out of two virtual interfaces from MSTP bridge to MSTP, MSTP, delete two virtually Interface.

4. the loop prevention method based on MSTP in CE dual homed access PE networking as described in claim 1, it is characterised in that: the void Quasi- interface sends or receives bridge protocol data unit signaling message, and participates in topological calculating.

5. the loop prevention method based on MSTP in CE dual homed access PE networking as described in claim 1, it is characterised in that: calculate life When at tree, MSTP uniformly calculates two virtual interfaces and other physical ports.