CN102143004A - Link protection method and network equipment - Google Patents
Link protection method and network equipment Download PDFInfo
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- CN102143004A CN102143004A CN2011100901752A CN201110090175A CN102143004A CN 102143004 A CN102143004 A CN 102143004A CN 2011100901752 A CN2011100901752 A CN 2011100901752A CN 201110090175 A CN201110090175 A CN 201110090175A CN 102143004 A CN102143004 A CN 102143004A
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Abstract
The invention relates to a link protection method and network equipment. The method comprises the following steps: configuring open-loop peer bidirectional forwarding detection (peer BFD) on two pieces of user-facing provider edge (UPE); respectively configuring link BFD for at least one piece of open-loop user access equipment on two pieces of UPE; and configuring a virtual route redundancy protocol (VRRP) for a first virtual local area network (VLAN) in all pieces of VLAN in at least one piece of user access equipment. The method disclosed by the invention has the advantages that the spare UPE of the first VLAN can quickly sense faults when the open loop has port faults, the spare UPE is configured as the new primary UPE for the first VLAN, the media access control (MAC) addresses of equipment on the open loop and a network provider edge (NPE) are cleared, and thus the flow of the first VLAN is avoided from interrupting.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of link protection method and the network equipment.
Background technology
Metropolitan area network is made up of one or more Metro Ethernets (ME) zone, and each ME zone comprises network side provider edge equipment (NPE), BAS Broadband Access Server (BRAS), one or more user side provider edge equipment (UPE).NPE is the nucleus equipment in ME zone, on connect the core of metropolitan area network, connect the UPE ring or the tree in ME zone down, the other BRAS that hangs the ME zone.UPE is responsible for inserting Digital Subscriber Line Access Multiplexer (DSLAM), Ethernet switch, many serving access node (MSAN) and VPN user side apparatus (VPN CE) equipment as the PE equipment in the single ME zone.
Enterprise network adopts loop configuration to be linked on the UPE by convergence switch mostly, so that high reliability to be provided, finishes two layers of transparent transmission function of unicast service and multicast service.But a produced simultaneously problem is: each node all needs to learn the MAC Address of all nodes on the access ring, increase ring and gone up the mac address table of each node, and encircled the business that any one node generation Single Point of Faliure all may influence other nodes that goes up.
According to whether there being direct connected link two layers of access ring can be divided into closed loop and open loop between two UPE.The double layer network that inserts for closed loop in case exist loop will cause message constantly to duplicate and circulate, produces broadcast storm in loop.By disposing Spanning-Tree Protocol (STP), RSTP (RSTP), Multiple Spanning Tree Protocol broken ring agreements such as (MSTP), blocking network redundant link optionally is trimmed to network tree-shaped, reaches the purpose of cancellation loop.Simultaneously, when looped network generation link failure, can promptly decontrol port blocked, carry out link switchover, recover each node communication path on the looped network.
Though agreement such as STP, MSTP can be eliminated the loop under the closed-loop case and reach the purpose of redundant link backup, when access ring is open loop, can not have double-layer loop, the configuration loop agreement is nonsensical.At two layers of access ring is under the situation of open loop, if Single Point of Faliure occurs, then the MAC forwarding-table item of other switches no longer has been applicable to and need carries out topological network after the fault mac address forwarding table item to access ring and upgrade on the ring before the fault.If only rely on backhaul traffic to learn new MAC address entries, for a long time packet loss or interruption.
Summary of the invention
One object of the present invention is for providing a kind of link protection method and the network equipment.
Technical solution of the present invention is as follows:
A kind of link protection method; be applied in the communication network; in described communication network; one comprises that many customer access equipments link to each other with carrier network with the open loop of two user side provider edge equipment UPE; the two ends of described open loop are described two UPE; described two UPE link to each other with two network side provider edge equipment NPE of carrier network respectively, and described method comprises:
Configuration detects peer BFD through the reciprocity two-way forwarding of described open loop on described two UPE;
On described two UPE at least one the two-way forwarding detection of customer access equipment difference configuration link link BFD in the described open loop;
On described two UPE the VLAN configuration virtual router redundance protocol VRRP among the whole VLAN in described at least one the customer access equipment;
For a described VLAN determines standby UPE;
The standby UPE of a described VLAN determines a customer access equipment originating port fault in the described open loop according to the state of described Peer BFD;
The standby UPE of a described VLAN determines that the link BFD between the customer access equipment at self and a described VLAN place keeps normal;
The standby UPE of a described VLAN will self be configured to the new main UPE that uses of a described VLAN by the VRRP agreement;
Described new main the transmission to described open loop with UPE empties the FLUSH message, sends MAC Address to the NPE that links to each other with self and cancels message.
Preferably, in described method, describedly, the two-way forwarding of at least one customer access equipment configuration link in the described open loop comprises for detecting link BFD:
For every customer access equipment in the described open loop disposes link BFD respectively.
Preferably, in described method, the described NPE that links to each other with self is described new main UPE of using and the NPE between the Broadband Remote Access Server BRAS in the network.
Preferably, in described method, mix and run for the user-side port of every described UPE disposes two or three layers.
Preferably, in described method, indirectly connected between described two UPE.
A kind of link protection method; be applied in a kind of communication network; in described communication network; one comprises that many customer access equipments link to each other with carrier network with the open loop of two user side provider edge equipment UPE; the two ends of described open loop are described two UPE; described two UPE link to each other with two network side provider edge equipment NPE of carrier network respectively, and described method comprises:
Operation Virtual Router Redundacy Protocol VRRP between described two UPE;
Determine main with UPE and standby UPE;
Based on described VRRP, the user-side port of described main user-side port with UPE, the described main NPE that links to each other with UPE with the UPE network-side port and with described master is carried out the port detection;
Determine that a port in described three ports breaks down;
Described standby UPE switches to the new main UPE that uses based on described VRRP;
Described new main the transmission to described open loop with UPE empties the FLUSH message, to cancelling message with described new master with the NPE transmission MAC Address that UPE links to each other.
Preferably, in described method, the NPE that described and described new master links to each other with UPE is described new main UPE of using and the NPE between the Broadband Remote Access Server BRAS in the network.
A kind of network equipment comprises:
The two-way forwarding of equity detects peer BFD configurator, is used for disposing on the described network equipment peer BFD through an open loop, and wherein, described open loop comprises the described network equipment, many customer access equipments and another network equipment;
Link bidirectional is transmitted and is detected link BFD configurator, is used for being at least one customer access equipment configuration link BFD in the described open loop on the described network equipment;
Virtual Router Redundancy Protocol VRRP configurator is used on the described network equipment VLAN configuration VRRP for whole VLAN of described at least one customer access equipment;
The standby determiner is used for determining that the described network equipment is the standby UPE of a described VLAN;
The port failure determiner is used for the state according to described Peer BFD, determines a customer access equipment originating port fault in the described open loop;
Link bidirectional transmit to detect link BFD state determiner, is used for determining that the link BFD between the customer access equipment at the described network equipment and a described VLAN place keeps normally;
The UPE configurator, being used for by the VRRP agreement is the new main UPE that uses of a described VLAN with described network equipments configuration;
Empty FLUSH message transmitter, be used for emptying the FLUSH message to described open loop transmission;
MAC Address is cancelled device, is used for sending MAC Address to the NPE that links to each other with self and cancels message.
The invention has the advantages that, when described open loop originating port fault, the standby UPE of a described VLAN can rapidly perception fault generation, and the new main UPE that uses of a described VLAN will self be configured to, and remove the MAC Address of the NPE of equipment in the described open loop and network side, thereby avoid the flow of a described VLAN to interrupt.
Description of drawings
Figure 1 shows that the network diagram of one embodiment of the invention;
Figure 2 shows that the method flow diagram of one embodiment of the invention;
Figure 3 shows that the network diagram of one embodiment of the invention;
Figure 4 shows that the network diagram of one embodiment of the invention;
Figure 5 shows that the network diagram of one embodiment of the invention;
Figure 6 shows that the network equipment schematic diagram of one embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is launched to describe in detail.But it is noted that these following embodiment, only for help to understand technical scheme for example, and be not used in qualification the present invention.
A method embodiment of the present invention is as follows.
In a kind of communication network, one comprises that many customer access equipments link to each other with carrier network with the open loop of two user side provider edge equipments (UPE), the two ends of described open loop are described two UPE, and described two UPE link to each other with two network side provider edge equipments (NPE) of carrier network respectively.Preferably, described NPE is provider edge equipment aggregation (PEAGG).
As described in Figure 1, preferably, in the present embodiment, described many customer access equipments are 5 switches (SW), are respectively switch 1-5, and described two UPE are respectively UPE-A and UPE-B, and described open loop comprises described switch 1-5, UPE-A and UPE-B.In addition, described two NPE are respectively NPE-A and NPE-B.Described NPE is used for virtual special local area network service (VPLS) flow from coupled UPE being converged and terminating, and shunts processing according to different business.
Preferably, in the present embodiment, as shown in Figure 1, described many customer access equipment dual homeds insert the VPLS network, described two UPE are positioned at the edge of described VPLS network, and between described two UPE is not direct-connected mode, that is to say, goes back chain between described UPE-A and the UPE-B and is connected to other network equipments.Preferably, the user-side port for every described UPE disposes two or three layers of mixed race.Described user-side port is meant the physical port that a UPE is connected with user side equipment.
As shown in Figure 2, present embodiment may further comprise the steps.
The reciprocity two-way forwarding of step 21, the described open loop of configuration process on described two UPE detects (peer BFD).
Because described peer BFD is through described open loop, therefore, described peer BFD can carry out fault detect to any port in the described open loop.Port in the described open loop comprise whole customer access equipments in the described open loop in described open loop upper port, also comprise the port of described two UPE in open loop.As shown in Figure 1, every switch all has two ports to be positioned in the described open loop, and these ports are exactly the port in the described open loop; Described UPE-A is the port that links to each other with described switch 1 on the described UPE-A at the port in the described open loop, and described UPE-AB is the port that links to each other with described switch 5 on the described UPE-B at the port in the described open loop.
Any port in described open loop breaks down, and described peer BFD just interrupts, and described two UPE go up just can fault take place by the port that described peer BFD is determined in the rare open loop.
Described two UPE can be established to the link BFD of any customer access equipment in the described open loop respectively, also can be established to the linkBFD of any a plurality of customer access equipments in the described open loop respectively, can also be established to the link BFD of whole customer access equipments in the described open loop respectively.
As shown in Figure 1, described UPE-A and UPE-B can set up link BFD respectively with a switch among the described switch 1-5, and for example described UPE-A and UPE-B and switch 3 are set up linkBFD respectively;
Described UPE-A and UPE-B also can set up link BFD respectively with many switches among the described switch 1-5, and for example described UPE-A and UPE-B and switch 2,3 and 4 are set up link BFD respectively;
Described UPE-A and UPE-B can also set up link BFD respectively with every switch among the described switch 1-5.
A described VLAN can be arbitrary VLAN of the arbitrary access device in described at least one the customer access equipment.
For example, as shown in Figure 1, when described at least one customer access equipment was switch 3, a VLAN in the then described switch 3 was a described VLAN.
Owing on described two UPE, disposed VRRP, therefore can from described two VLAN, determine a standby UPE according to described VRRP for a described VLAN for a described VLAN.For example, as shown in Figure 1, described UPE-B can be defined as the standby UPE of described each VLAN.In case determined described standby UPE, the master corresponding with described standby UPE also just determined by corresponding with UPE.
The standby UPE of step 25, a described VLAN determines a customer access equipment originating port fault in the described open loop according to the state of described Peer BFD.
Because the standby UPE of a described VLAN has disposed Peer BFD, the therefore state that the standby UPE of a described VLAN can perception Peer BFD.When Peer BFD took place to interrupt, the standby UPE of a described VLAN can determine a customer access equipment originating port fault in the described open loop.
For example, as described in Figure 3, when port failure that is positioned in the open loop of described switch 2, described Peer BFD interrupts, and correspondingly, UPE-A and UPE-B all can determine to have a customer access equipment originating port fault in open loop shown in Figure 3.
The standby UPE of step 26, a described VLAN determines that the link BFD between the customer access equipment at self and a described VLAN place keeps normal.
The standby UPE of step 27, a described VLAN uses UPE by the VRRP agreement with the new master who self is configured to a described VLAN.Like this, provide service with UPE to a described VLAN by described new master.
For example, when a VLAN in the switch shown in Figure 33 was a described VLAN, the described new main of a described VLAN was described UPE-B with UPE.Described UPE-B uses UPE with the new master who self is configured to a described VLAN.
Preferably, the new master of other VLAN of the described new main customer access equipment that self can also be configured to a described VLAN place with UPE uses UPE.For example, except a described VLAN, also comprise one or more other VLAN in the switch 3.Described UPE-B uses VLAN as the new master of a described VLAN, and the new master that self can also be configured to other VLAN of switch 3 uses UPE.Like this, the UPE-B new master that just becomes whole VLAN of switch 3 uses UPE.
New main the transmission to described open loop with UPE of step 28, a described VLAN empties (FLUSH) message, sends MAC Address to the NPE that links to each other with self and cancels message.Described MAC cancels the MAC Address that message is used to remove the described NPE that links to each other with self; Described FLUSH message is used to remove the MAC Address of the customer access equipment in the described open loop.
As shown in Figure 3, after the port of switch 2 broke down, the flow of the VLAN in the switch 3 will switch to UPE-B from described UPE-A.
Preferably, the described NPE that links to each other with self is meant the new main NPE with (BRAS) between UPE and the described Broadband Remote Access Server of a described VLAN.For example, in the network shown in fig. 1, described UPE-B is the new main UPE, the NPE that described NPE-B links to each other with described UPE-B of using of a described VLAN.
According to embodiments of the invention as can be known, when described open loop originating port fault, the standby UPE of a described VLAN can rapidly perception fault generation, and the new main UPE that uses of a described VLAN will self be configured to, and remove the MAC Address of the NPE of equipment in the described open loop and network side, thereby avoid the flow of a described VLAN to interrupt.
A method embodiment of the present invention thes contents are as follows.
A kind of communication network comprises an open loop and two network side provider edge equipment NPE.Described open loop comprises many customer access equipments and two UPE, and the two ends of described open loop are described two UPE, and described two UPE link to each other with described two NPE respectively.Preferably, as Fig. 4 or shown in Figure 5, described two UPE are respectively UPE-A and UPE-B, and described two NPE are respectively NPE-A and NPE-B, and described UPE-A links to each other with described NPE-A, and described UPE-B links to each other with described NPE-B.
Operation VRRP agreement between described UPE-A and UPE-B elects main with UPE and standby UPE.Correspondingly, in the present embodiment, be that the master uses NPE with the NPE that described master links to each other with UPE, the NPE that links to each other with described standby UPE is standby N PE.
To described main with the port that links to each other with described customer access equipment among the UPE, described main with carrying out port detection with port and the described master that NPE links to each other with the port that links to each other with UPE with described master among the NPE with described master among the UPE, and at least one port in definite described three ports breaks down.
Described standby UPE switches to new master and uses UPE.
Described new master sends MAC with UPE to coupled NPE and cancels message, and empties (FLUSH) message to described open loop transmission.Described MAC cancels the MAC Address that message is used to remove the NPE that links to each other with self; Described FLUSH message is used to remove the MAC Address of the customer access equipment in the described open loop.
Preferably, the NPE that links to each other with UPE of described with new master is meant described new main with the NPE between UPE and the Broadband Remote Access Server (BRAS).
Described VRRP agreement possesses port detection function, if any one in described three ports breaks down, can determine the originating port fault fast, thereby can carry out the UPE main and standby relation in time switches, described master is switched to new standby UPE with UPE, described standby UPE is switched to described new master use UPE.
In Fig. 4 and network shown in Figure 5, the master of switch 3 is NPE-A with UPE, and the flow of switch 3 is transmitted by described NPE-A.
As shown in Figure 4, when the last port that links to each other with described NPE-A of described UPE-A broke down, the new master that described NPE-B switches to switch 3 used UPE, and the flow of described switch 3 will be transmitted by described NPE-B.
As shown in Figure 5, when described NPE-A breaks down with the port that Broadband Remote Access Server (BRAS) links to each other, then described NPE-B switches to the new main of switch 3 and uses UPE, and the flow of described switch 3 will be transmitted by described NPE-B.
According to embodiments of the invention as can be known, when the described main port that links to each other with described customer access equipment in UPE, the described port that links to each other with NPE with described master in leading with UPE or describedly break down with the port that UPE links to each other with described master in leading with NPE, then can carry out active and standby switching, described standby UPE is switched to the new main UPE that uses, and remove the MAC Address of the NPE of equipment in the described open loop and network side, thereby can realize that flow switches fast, prevent that flow from interrupting because of port failure.
A device embodiment of the present invention is as follows.
A kind of network equipment can be applicable in a kind of communication network.Preferably, in described communication network, an open loop that comprises many customer access equipments and two described network equipments links to each other with carrier network, the two ends of described open loop are described two network equipments, and described two network equipments link to each other with two network side provider edge equipment NPE of carrier network respectively.Preferably, the described network equipment is user's provider edge equipment UPE.
As shown in Figure 6, the described network equipment 600 comprises following a plurality of device.
The two-way forwarding of equity detects peer BFD configurator 601, is used for the peer BFD of the described open loop of configuration process on the described network equipment 600, and wherein, described open loop comprises the described network equipment 600, many customer access equipments and another network equipment.The two ends of described peer BFD are configured on the described network equipment 600 and described another network equipment.
Link bidirectional is transmitted and is detected link BFD configurator 602, is used for being at least one customer access equipment configuration link BFD in the described open loop on the described network equipment 600.Described link BFD configurator is, many or whole customer access equipment configuration link BFD in the described open loop.If described one, many or whole customer access equipment originating port fault, the described network equipment 600 just can detect port failure by the link BFD of configuration.
Virtual Router Redundancy Protocol VRRP configurator 603 is used on the described network equipment VLAN configuration VRRP for whole VLAN of described at least one customer access equipment.Preferably, described VRRP configurator 603 can also also dispose VRRP for other VLAN among described whole VLAN.
Link bidirectional transmit to detect link BFD determiner 605, is used for determining that the link BFD between the customer access equipment at the described network equipment 600 and a described VLAN place keeps normally.
Empty (FLUSH) message transmitter 608, be used for sending the FLUSH message to described open loop, MAC Address is cancelled device 609, is used for sending MAC Address to the NPE that links to each other with self and cancels message.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
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.
Claims (8)
1. link protection method; be applied in the communication network; in described communication network; one comprises that many customer access equipments link to each other with carrier network with the open loop of two user side provider edge equipment UPE; the two ends of described open loop are described two UPE; described two UPE link to each other with two network side provider edge equipment NPE of carrier network respectively, it is characterized in that described method comprises:
Configuration detects peer BFD through the reciprocity two-way forwarding of described open loop on described two UPE;
On described two UPE at least one the two-way forwarding detection of customer access equipment difference configuration link link BFD in the described open loop;
On described two UPE the VLAN configuration virtual router redundance protocol VRRP among the whole VLAN in described at least one the customer access equipment;
For a described VLAN determines standby UPE;
The standby UPE of a described VLAN determines a customer access equipment originating port fault in the described open loop according to the state of described Peer BFD;
The standby UPE of a described VLAN determines that the link BFD between the customer access equipment at self and a described VLAN place keeps normal;
The standby UPE of a described VLAN will self be configured to the new main UPE that uses of a described VLAN by the VRRP agreement;
Described new main the transmission to described open loop with UPE empties the FLUSH message, sends MAC Address to the NPE that links to each other with self and cancels message.
2. method according to claim 1 wherein, describedly comprises for the two-way forwarding of at least one customer access equipment configuration link in the described open loop detects link BFD:
For every customer access equipment in the described open loop disposes link BFD respectively.
3. method according to claim 1, wherein, the described NPE that links to each other with self is described new main UPE of using and the NPE between the Broadband Remote Access Server BRAS in the network.
4. method according to claim 1 wherein, is mixed and is run for the user-side port of every described UPE disposes two or three layers.
5. method according to claim 1, wherein, indirectly connected between described two UPE.
6. link protection method; be applied in a kind of communication network; in described communication network; one comprises that many customer access equipments link to each other with carrier network with the open loop of two user side provider edge equipment UPE; the two ends of described open loop are described two UPE; described two UPE link to each other with two network side provider edge equipment NPE of carrier network respectively, it is characterized in that described method comprises:
Operation Virtual Router Redundacy Protocol VRRP between described two UPE;
Determine main with UPE and standby UPE;
Based on described VRRP, the user-side port of described main user-side port with UPE, the described main NPE that links to each other with UPE with the UPE network-side port and with described master is carried out the port detection;
Determine that a port in described three ports breaks down;
Described standby UPE switches to the new main UPE that uses based on described VRRP;
Described new main the transmission to described open loop with UPE empties the FLUSH message, to cancelling message with described new master with the NPE transmission MAC Address that UPE links to each other.
7. method according to claim 6 is characterized in that, the NPE that described and described new master links to each other with UPE is described new main UPE of using and the NPE between the Broadband Remote Access Server BRAS in the network.
8. a network equipment is characterized in that, the described network equipment comprises:
The two-way forwarding of equity detects peer BFD configurator, is used for disposing on the described network equipment peer BFD through an open loop, and wherein, described open loop comprises the described network equipment, many customer access equipments and another network equipment;
Link bidirectional is transmitted and is detected link BFD configurator, is used for being at least one customer access equipment configuration link BFD in the described open loop on the described network equipment;
Virtual Router Redundancy Protocol VRRP configurator is used on the described network equipment VLAN configuration VRRP for whole VLAN of described at least one customer access equipment;
The standby determiner is used for determining that the described network equipment is the standby UPE of a described VLAN;
The port failure determiner is used for the state according to described Peer BFD, determines a customer access equipment originating port fault in the described open loop;
Link bidirectional transmit to detect link BFD state determiner, is used for determining that the link BFD between the customer access equipment at the described network equipment and a described VLAN place keeps normally;
The UPE configurator, being used for by the VRRP agreement is the new main UPE that uses of a described VLAN with described network equipments configuration;
Empty FLUSH message transmitter, be used for emptying the FLUSH message to described open loop transmission;
MAC Address is cancelled device, is used for sending MAC Address to the NPE that links to each other with self and cancels message.
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| CN103259685A (en) * | 2013-05-24 | 2013-08-21 | 杭州华三通信技术有限公司 | Method for detecting link failures and network equipment |
| CN111262745A (en) * | 2020-04-01 | 2020-06-09 | 江苏华创微系统有限公司 | Information processing platform redundancy system design |
| CN114786075A (en) * | 2022-06-20 | 2022-07-22 | 广州培生智能科技有限公司 | Reliable network structure and redundancy processing method |
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| CN101345686A (en) * | 2008-08-15 | 2009-01-14 | 华为技术有限公司 | Processing method, apparatus and system of virtual special local area network service loop |
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| CN111262745A (en) * | 2020-04-01 | 2020-06-09 | 江苏华创微系统有限公司 | Information processing platform redundancy system design |
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