CN101127637A - A method and system for realizing backup link of virtual private LAN service network - Google Patents
A method and system for realizing backup link of virtual private LAN service network Download PDFInfo
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Abstract
The utility model discloses a method and system for realizing VPLS network backup link with simple configuration and rapid switching. The method relates to a VPLS network based on multi-protocol label switching (i.e. MPLS) and a core network, comprising the following steps: (a) a virtual route forwarding instance is arranged on the interfaces of the core network route which is connected with the VPLS network so that one interface of the router is considered as a virtual router, moreover the interface information of the router in the VPLS network which is connected with the virtual router is recorded in the VRF instance; (b) In order to configure the same group and virtual address for the virtual routers, the virtual routers in the same group are backup routers each other, the link connected with the VPLS network are backup chain each other; (c) when three layers of gateways receive the address resolution protocol (i.e. ARP) request sent by user, the status of the virtual router is checked, the main chain is utilized to return ARP response to the user.
Description
Technical field
The present invention relates to the network organizing technology, particularly the method for the link backup in VPLS (virtual special local area network service) network.
Background technology
In today along with the high speed development of network technology, Ethernet is widely used always, people like for Ethernet, impel the service supplier to attempt with the basis of Ethernet as broadband of future generation UNE framework, for enterprises and individuals user provides the networking telephone, video request program, a series of services such as online game, the at first appearance of MPLS (multiprotocol label switching) Ethernet, extensibility and reliability that Ethernet lacks have been remedied, and integrate the advantage of Ethernet and MPLS based on the VPLS (virtual special local area network service) of MPLS technology, the Ethernet of carrier-class can be provided, as a kind of service, VPLS provides strong telescopic multiple spot Ethernet VPN (virtual private networks) service, become the strong replacer of special line, it has the connection of point-to-multipoint, can be Ethernet bring can be higher reliability, extensibility.
VPLS provides very high reliability, when any router breaks down, data flow can be walked from backup path, the pause of flow only is several signas, yet in existing backup link final result scheme, the general method that increases extra equipment that all adopts realizes link backup or equipment redundancy, extra increase the networking cost of operator, for the terminal use, must revise the routing configuration of local equipment again simultaneously, increase maintenance cost.
Summary of the invention
The problem to be solved in the present invention provides a kind of method and system of the VPLS of realization network backup link, and configuration is simple, and switch speed is fast.
In order to solve the problems of the technologies described above, the invention provides and a kind ofly realize that the virtual special local area network service is the method for VPLS network backup link, relating to based on multiprotocol label switching is the VPLS network of MPLS, and core net, may further comprise the steps:
(a) the configuration virtual routing transmitting example is VRF on the core net router device interface that links to each other with the VPLS network, so that an interface is considered as a virtual router on this router device, and will charge in the described VRF instance with the interface message of router device in the VPLS network that described virtual router is connected;
(b) be identical group and the virtual address of described virtual router configuration, the router that backups each other of virtual router on the same group, the link that links to each other with the VPLS network link that backups each other;
(c) close when receiving that address resolution protocol that the user sends is the ARP Address requests when three-layer network, check virtual router state, utilize primary link to return arp reply to the user.
Further, said method also can have following characteristics, and in described step (b), described virtual address is meant local VPLS user's gateway address.
Further, said method also can have following characteristics, in described step (c), described three-layer network closes checks virtual router state, if find major state router failure or primary link failure, then re-elect, the Status of Backups router is elected the router that is main state, this moment, backup link was a primary link.
Further, said method also can have following characteristics, and described step (c) further comprises:
Users broadcasting sends the ARP request message to gateway ip address; Gateway is checked virtual router state after receiving the ARP request, returns arp reply by the major state link; The port of corresponding major state link is received the physical address of study gateway after the described arp reply in the VPLS network, and described user is returned in described arp reply; Described user utilizes the ARP address that obtains to send message.
In order to solve the problems of the technologies described above, the present invention also provides a kind of and has realized that the virtual special local area network service is the system of VPLS network backup link, and relating to based on multiprotocol label switching is the VPLS network of MPLS, and core net, wherein:
Include the VPLS business module in the router device in the described VPLS network, be used to make up local VPLS metropolitan area network, for the user provides the two-layer VPN access service;
With comprise with lower module in the router device in the described core net that local VPLS network links to each other:
The three-layer VPN business module, in order to provide the three-layer VPN user to insert, and be used for interface that the VPLS network links to each other on the configuration virtual routing transmitting example be VRF, so that an interface is considered as a virtual router on this router device, and will charge in the described VRF instance with the interface message of router device in the VPLS network that described virtual router is connected;
The VRRP business module is used to provide the redundant router function, is identical group and the virtual address of described virtual router configuration, the router that backups each other of virtual router on the same group, the link that links to each other with the VPLS network link that backups each other;
Send and receiver module, when being used to receive address resolution protocol that the user sends and being the ARP Address requests, and mutual with described VRRP business module, utilize primary link to return arp reply to the user.
Further, said system also can have following characteristics, and described virtual address is meant local VPLS user's gateway address.
Further, said system also can have following characteristics, described VRRP business module also is used to check virtual router state, if find major state router failure or primary link failure, then re-elect, the Status of Backups router is elected the router that is main state, and this moment, backup link was a primary link.
The present invention neither needs operator additionally to acquire equipment, does not also need the user to remodify the link backup of configuration, can make that VPLS operator is lighter, high performance-price ratio manageable Ethernet VPN service is provided.Compared with prior art, the present invention is ingenious at VPN and VRRP (Virtual Router Redundacy Protocol Virtual Router Redundancy Protocol) technology, use VPN technologies to separate actual router device, by this business, be able to simulate a plurality of virtual routers with less equipment, pass through the utilization of VRRP business again, with the characteristics of VPLS network self, guaranteed that the VPLS network under the situation that does not increase extras, is implemented in the link backup in the VPLS network, need not to dispose many routes and route relaying, configuration is simple, and switch speed is fast, and cost is low, make network healthy and strong more, thereby guarantee the safe transmission of data flow.
Description of drawings
Fig. 1 is the networking schematic diagram of the embodiment of the invention;
Fig. 2 is an embodiment of the invention backup configuration flow chart;
Fig. 3 is an embodiment of the invention VRRP Interface status graph of a relation;
Fig. 4 is the flow chart that VPLS user sends message in the embodiment of the invention;
Fig. 5 is the actual networking application drawing of the embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
The networking structure of present embodiment comprises as shown in Figure 1:
MPLS VPLS network: be local metropolitan area network, be based on the VPLS network of MPLS, have a plurality of PE equipment to carry out the two-layer VPN user expansion in same VPLS territory, simultaneously on different PE equipment, have multilink to be connected on same the equipment in the core net;
Edge router PE (Provider Edge) equipment is for supporting some router devices of VPLS, VPN, VRRP business, it comprises some physical interfaces, in order to set up core net and VPLS metropolitan area network and local user's Ethernet, be the physical support of present embodiment;
Need to load the VPLS business module in the router device in the MPLS VPLS network, this module is used for making up local VPLS metropolitan area network, for the user provides the two-layer VPN access service;
Equipment of the core network A: be local core net router PE equipment, need on this router, dispose VRF VPN, be tied to the interface that is connected with VPLS PE equipment, simultaneously configuration VRRP business on these interfaces;
Need in the ingress router equipment that links to each other with local VPLS metropolitan area network in the core net (hereinafter to be referred as the core net ingress router) to load with lower module:
The VRRP business module provides the redundant router function, is the indispensable business module of backup link function necessity of configuration VPLS network;
The three-layer VPN business module, in order to provide the three-layer VPN user to insert, and separate distinct interface on the same equipment, carry out redundancy backup by vpn service simulation virtual router, on each virtual router interface, dispose VRF (virtual routing transmitting example) and will charge in the described VRF instance with the VPLS access device that this virtual router interface connects;
In addition, also have a sending/receiving module, be used for described VRRP module mutual.
Use layoutprocedure of the present invention as shown in Figure 2, may further comprise the steps:
Steps A is configured by the VPLS business module of each PE equipment of metropolitan area network, makes up the VPLS metropolitan area network;
Step B, the three-layer VPN business module on the core net ingress router dispose VRF (virtual routing transmitting example) on the interface of core net ingress router, make the port of each and VPLS PE equipment interconnection be considered as a virtual router;
Step C adds the interface message of the VPLS PE that is connected with each virtual interface of core net ingress router respectively in each VRF instance;
Step D, all dispose the VRRP business module on above-mentioned each virtual interface, dispose identical group and virtual address, wherein virtual address is local VPLS user's a gateway address, the router that backups each other of virtual router on the same group, the link that links to each other with the VPLS network link that backups each other.
So far, the link that all backups each other of the link between each PE and the core net has been realized the link backup function.
As shown in Figure 3, the VRRP business module is responsible for the state transition of three layers of PE equipment VRRP, configuration three-layer VPN business on core net ingress router A, make the port of each and VPLS PE equipment interconnection become a virtual router, between these virtual routers, carry out the active and standby router election of VRRP; Particularly, the state of VRRP comprises three kinds: initial condition initialize, major state master, Status of Backups backup, wherein:
State 1:initialize state when router interface starts VRRP, is this state, needs to send the VRRP advertised information, carries out the election of Master and backup;
State 2:master state, after each interface is finished election process, the election winner transfers the Master state to, and the interface of this state sends the virtual mac address of the virtual VRRP IP address of router of broadcast arp information announcement, and response is to the ARP request message of virtual VRRP IP address;
State 3:backup state, after the election process, all the other interfaces transfer the Backup state to, the advertised information of timer regular check Master is set, after Master Interface lost efficacy, forwards the initialize state to, again conduct an election, former backup state interface transfers the Master state interface to.
Handling process when the terminal use of VPLS sends message may further comprise the steps as shown in Figure 4:
Step 101:VPLS terminal is searched route, begins to encapsulate IP and uses message;
Step 102: search local ARP (address resolution protocol) table, check that whether the ARP address of gateway is arranged is virtual VRRP address, if, execution in step 111, otherwise, execution in step 103;
Step 103: local user's broadcast transmission is to the ARP request message of gateway ip address;
Step 104: gateway is received the ARP request to virtual VRRP address, checks the VRRP virtual router state, selects interface: if current primary link is normal, forward step 105 to; Otherwise the use backup link forwards step 107 to;
Step 105: primary link is that the VRRP major state interface of core net access device sends the arp reply message;
Port in the step 106:VPLS network and the VPLS PE equipment that core net access device major state interface docks is that the primary link port is received the arp reply message, and this port is learnt the MAC (physical address) of gateway address, execution in step 109;
Step 107: when primary link broke down, the backup link of gateway router was that the VRRP Status of Backups interface of core net access device moves the link that is main state at this moment, sent the arp reply message;
Port in the step 108:VPLS network and the VPLSPE equipment that core net access device Status of Backups interface docks is that the backup link port is received the arp reply message, upgrades the MAC table of (study is also revised) VPLS network;
Step 109:VPLS network continues to transmit the arp reply message to the local user;
Step 110: the local user continues execution in step 111, otherwise returns step 103 if receive the arp reply message, continues to send the ARP request;
Step 111: the two layer message of local user's encapsulated user data sends to the VPLS network;
Step 112:VPLS searches the MAC table, is sent to the core net gateway from corresponding ports;
Comprehensively above-mentioned, realization principle of the present invention is: after the distinct interface at the core net ingress router configures VPN and VRRP business, VPN has separated distinct interface on the same router, actual router is become a plurality of virtual routers, these virtual routers carry out the VRRP election then, elect master and backup, when the VPN user communication of the VPLS user of VPN and far-end, at first the broadcast arp request message of local user's transmission is to each VRRP interface, but have only the master interface to make request response message, VPLS is from learning gateway MAC with the mating interface of master, Ben Di MAC Address is announced to VPLS user then, and VPLS user uses the gateway A RP encapsulated message of knowing; When master interface or institute's connected link break down, this moment, the backup interface was not received the VRRP notification packet always, to carry out the VRRP election again, thereby transfer the master interface to, announcement ARP message, this moment, VPLS PE will be from the ARP address of learning gateway with the interface of this interface butt joint, and then the message that sends of subsequent user will be forwarded to new master interface from this interface, so far, VPLS user local and far-end just can carry out communication
As shown in Figure 5, actual networking diagram of the present invention comprises:
Router one 03,104,105 is the PE equipment in the same VPLS of local metropolitan area network territory, and three equipment all can meet a plurality of users down, and this networking is by the switch 106,107,108 that connects a plurality of connection subscriber equipmenies under 105 equipment.The link backup function is realized by 103,104 equipment.
At first 103,104 backup each other, adopt two links butt joints between the active and standby router, two links link that backups each other guarantees data security; Active and standby router is respectively by link A, the up access core net of link B, suppose that originally link A link is elected primary link as, when VPLS user asks gateway MAC, then have only 101-1 can reply arp reply message this moment, the VPLS network will be gone up dynamic learning gateway MAC Address from 103 link A, and the MAC Address that will learn is communicated to the VPLS PE equipment (as 105) of equity, all next jumpings will send to 103 equipment for the data of gateway, and by link A forwarding, when 103 equipment break down, or when other fault that causes that link A lost efficacy is arranged, link A is cut off, trigger VRRP interface 101-1, re-electing between the 101-2,102-2 will change into master from the backup state, and the MAC Address of announcement gateway, the MAC Address that this moment, the VPLS network will be from 104 learning equipments to gateway, and be communicated to other reciprocity VPLS PE equipment, after this all data via gateway will send to 104 equipment, and transmit by link B.
Claims (7)
1. realize that the virtual special local area network service is the method for VPLS network backup link for one kind, relating to based on multiprotocol label switching is the VPLS network of MPLS, and core net, it is characterized in that, may further comprise the steps:
(a) the configuration virtual routing transmitting example is VRF on the core net router device interface that links to each other with the VPLS network, so that an interface is considered as a virtual router on this router device, and will charge in the described VRF instance with the interface message of router device in the VPLS network that described virtual router is connected;
(b) be identical group and the virtual address of described virtual router configuration, the router that backups each other of virtual router on the same group, the link that links to each other with the VPLS network link that backups each other;
(c) close when receiving that address resolution protocol that the user sends is the ARP Address requests when three-layer network, check virtual router state, utilize primary link to return arp reply to the user.
2. the method for claim 1 is characterized in that, in described step (b), described virtual address is meant local VPLS user's gateway address.
3. the method for claim 1, it is characterized in that, in described step (c), described three-layer network closes checks virtual router state, if find major state router failure or primary link failure, then re-elect, the Status of Backups router is elected the router that is main state, this moment, backup link was a primary link.
4. method as claimed in claim 3 is characterized in that, described step (c) further comprises:
Users broadcasting sends the ARP request message to gateway ip address; Gateway is checked virtual router state after receiving the ARP request, returns arp reply by the major state link; The port of corresponding major state link is received the physical address of study gateway after the described arp reply in the VPLS network, and described user is returned in described arp reply; Described user utilizes the ARP address that obtains to send message.
5. realize that the virtual special local area network service is the system of VPLS network backup link for one kind, relating to based on multiprotocol label switching is the VPLS network of MPLS, and core net, it is characterized in that,
Include the VPLS business module in the router device in the described VPLS network, be used to make up local VPLS metropolitan area network, for the user provides the two-layer VPN access service;
With comprise with lower module in the router device in the described core net that local VPLS network links to each other:
The three-layer VPN business module, in order to provide the three-layer VPN user to insert, and be used for interface that the VPLS network links to each other on the configuration virtual routing transmitting example be VRF, so that an interface is considered as a virtual router on this router device, and will charge in the described VRF instance with the interface message of router device in the VPLS network that described virtual router is connected;
The VRRP business module is used to provide the redundant router function, is identical group and the virtual address of described virtual router configuration, the router that backups each other of virtual router on the same group, the link that links to each other with the VPLS network link that backups each other;
Send and receiver module, when being used to receive address resolution protocol that the user sends and being the ARP Address requests, and mutual with described VRRP business module, utilize primary link to return arp reply to the user.
6. system as claimed in claim 5 is characterized in that described virtual address is meant local VPLS user's gateway address.
7. system as claimed in claim 5, it is characterized in that, described VRRP business module also is used to check virtual router state, if find major state router failure or primary link failure, then re-elect, the Status of Backups router is elected the router that is main state, and this moment, backup link was a primary link.
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| CN101820397A (en) * | 2010-05-25 | 2010-09-01 | 杭州华三通信技术有限公司 | Network convergence method and device in virtual private local area network |
| CN101562807B (en) * | 2009-05-27 | 2011-04-20 | 华为技术有限公司 | Mobile virtual private network (VPN) communication method and device and system thereof |
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| WO2012094884A1 (en) * | 2011-01-10 | 2012-07-19 | 中兴通讯股份有限公司 | Method and system for improving service reliability in virtual private network, and access device |
| CN102684915A (en) * | 2012-04-25 | 2012-09-19 | 中兴通讯股份有限公司 | Method and device for synchronizing ARP tables of host device and backup device through network management system |
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| CN101820397B (en) * | 2010-05-25 | 2012-10-03 | 杭州华三通信技术有限公司 | Network convergence method and device in virtual private local area network |
| CN101820397A (en) * | 2010-05-25 | 2010-09-01 | 杭州华三通信技术有限公司 | Network convergence method and device in virtual private local area network |
| CN102437919B (en) * | 2010-09-29 | 2015-05-27 | 中国电信股份有限公司 | Access router and link reliability protection method |
| CN102437919A (en) * | 2010-09-29 | 2012-05-02 | 中国电信股份有限公司 | Access router and link reliability protection method |
| WO2012094884A1 (en) * | 2011-01-10 | 2012-07-19 | 中兴通讯股份有限公司 | Method and system for improving service reliability in virtual private network, and access device |
| US8654632B2 (en) | 2011-03-18 | 2014-02-18 | Hangzhou H3C Technologies Co., Ltd. | Method for fast switching traffic in H-VPLS |
| CN102684915A (en) * | 2012-04-25 | 2012-09-19 | 中兴通讯股份有限公司 | Method and device for synchronizing ARP tables of host device and backup device through network management system |
| CN102684915B (en) * | 2012-04-25 | 2016-01-20 | 中兴通讯股份有限公司 | A kind ofly carry out the synchronous method of active and standby two-shipper ARP table and device by network management system |
| CN107276792A (en) * | 2017-05-27 | 2017-10-20 | 中国移动通信集团江苏有限公司 | Synthesized gateway disaster recovery method, device, equipment and computer-readable recording medium |
| CN107276792B (en) * | 2017-05-27 | 2020-06-12 | 中国移动通信集团江苏有限公司 | Integrated gateway disaster tolerance method, device, equipment and computer readable storage medium |
| CN112187638A (en) * | 2020-09-22 | 2021-01-05 | 杭州迪普科技股份有限公司 | Network access method, device, equipment and computer readable storage medium |
| CN114978987A (en) * | 2022-05-17 | 2022-08-30 | 北京交通大学 | Server redundancy backup method |
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