CN102201987A - Layer 3 interface connected route backup method and system - Google Patents
Layer 3 interface connected route backup method and system Download PDFInfo
- Publication number
- CN102201987A CN102201987A CN2011101196010A CN201110119601A CN102201987A CN 102201987 A CN102201987 A CN 102201987A CN 2011101196010 A CN2011101196010 A CN 2011101196010A CN 201110119601 A CN201110119601 A CN 201110119601A CN 102201987 A CN102201987 A CN 102201987A
- Authority
- CN
- China
- Prior art keywords
- route
- node
- direct
- stand
- backup
- 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.)
- Pending
Links
Images
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a layer 3 connected route backup method, which comprises: a backup route generation step used for generating a backup route by using a connected route from a node A to a node B; a backup route switching step used for switching service traffic from the node A to the node B onto the backup route for forwarding when the connected route fails; and a new route switching step used for switching the service traffic from the node A to the node B onto a new route for forwarding when the convergence of the route from the node A to the node B is finished to generate the new route. By the method, the rapid switching of layer 3 interface connected route can be realized under the condition of ensuring the invalidation of a layer 3 interface to meet the requirements of a client on protection switching performance. The invention correspondingly provides a layer 3 interface connected route backup system, which comprises a backup route generation module, a backup route switching module and a new route switching module.
Description
Technical field
The present invention relates to network appliance IP routing forwarding technical field, relate in particular to the direct-connected route backup method and system of a kind of three layers of IP interface.
Background technology
Current, the IP technology is used more and more widely in Metro E (Metro Ethernet, Metro Ethernet)/mobile Backhaul (mobile backhaul network), but in actual application, also exists great number of issues to need to solve.Protecting fast and switching is exactly one of them, moves among the Backhaul at MetroE/, does not interrupt in order to guarantee business, and often claimed switching time is less than 50ms.That is to say when main path breaks down, need in 50ms, switch to fast on the backup path of an other operate as normal.IP FRR (fast reroute, heavy-route fast) technology is just arisen at the historic moment.Current IP FRR utilizes isis (Intermediate System to Intermediate System, Intermediate System-to-Intermediate System)/ospf (Open Shortest Path First, ospf)/bgp (Border Gateway Protocol, Border Gateway Protocol) etc. Routing Protocol generates, but does not then relate to for direct-connected route aspect.
Accompanying drawing 1-2 is that a kind of typical case among the mobile network uses:
Among Fig. 1, PE (Provider Edge, provider edge equipment) 1 and PE2 go up operation VRRP (Virtual Router Redundancy Protocol, Virtual Router Redundacy Protocol) agreement, and PE1 is main, and PE2 is for being equipped with; And PE1 and PE2 are by three layers of interconnection; SGW (service gateway, Service Gateway) and PE1 equipment carry out intercommunication by direct-connected primary path.That is to say that the outgoing interface of the direct-connected route of the last corresponding sGW of PE1 is port P1.
Among Fig. 2, when the direct access path of PE1 and sGW breaks down, by BFD fast detection mechanisms such as (Bidirectional Forwarding Detection, two-way forwarding detects), PE1 and sGW can perceive this fault very soon; Because the PE1 state is normal, the VRRP main and standby relation is not done switching, and therefore, according to the protection handoff relation, PE1 and sGW should carry out intercommunication by being equipped with the path, also are that forward-path is sGW----PE2---PE1.For upstream, i.e. sGW to CE (Customer Edge, customer edge devices), because sGW can guarantee to switch fast in 50ms, the flow transfer path switches to sGW----PE2---CE, performance index can satisfy requirement of client substantially.But for downstream (CE is through PE1 to sGW), have only when PE1 is revised as on the P2 interface of normal condition to the route outgoing interface of sGW, could transmit normal.
Promptly in environment shown in Figure 2, the link occurs fault when between PE1 and sGW, causing three layer interface 10.1.1.2 states is DOWN (interface fails), when route does not also restrain, original packet that mails to sGW10.1.1.100 owing to can not find outgoing interface, will all be dropped.
IP route change between will realization equipment, traditional scheme has two kinds:
(1) rely on routing convergence to finish;
(2) rely on IP FRR.
The time of routing convergence generally more than the second level, obviously can not be satisfied requirement of client in the scheme (1); IP FRR in the scheme (2) generally only is applicable to the route backup that Routing Protocols such as utilizing isis/ospf/bgp generates at present, then do not relate to for direct-connected route aspect, and in the practical application, interconnect with direct-connected routing mode usually between PE1 and the sGW, so scheme (2) is not suitable for this situation yet.
Can see that by above-mentioned example there are some problems in three present layer interface through streets by switching, need transform the method for route backup.
Summary of the invention
In view of three layer interface through streets the problems referred to above by the switching existence; the present invention proposes the direct-connected route backup method and system of a kind of three layer interfaces; to guarantee under the situation of three layer interface DOWN, realize the quick switching of the direct-connected route of three layer interfaces, to satisfy client's protection performance of handoffs requirement.
According to an aspect of the present invention, provide a kind of three layer interfaces direct-connected route backup method.The direct-connected route backup method of this three layer interface may further comprise the steps:
Route stand-by generates step, and this step is used for, to node A route stand-by of direct-connected route generation to Node B;
The route stand-by switch step, this step is used for, and when described direct-connected route breaks down, node A is switched on the described route stand-by to the service traffics of Node B transmit;
New route switch step, this step is used for, and when node A finishes the new route of generation to the routing convergence of Node B after, node A is switched on the described new route to the service traffics of Node B transmit.
Further, described route stand-by is direct-connected route or dynamic routing.
Further, described route stand-by generation step comprises:
On node A,, generate a route stand-by for described direct-connected route by IP FRR configuration;
When described direct-connected route operate as normal, node A normally transmits along described direct-connected route to the service traffics of Node B.
Further, described route stand-by switch step comprises:
When the main port of node A lost efficacy,, the outbound port of the above direct-connected route of node A is switched to backup port by main port by IP FRR mechanism;
Before node A finished to the routing convergence of Node B, the service traffics from node A to Node B were transmitted along described route stand-by.
Further, described new route switch step comprises:
Node A normally restrains to the route of Node B;
After routing convergence finishes, on node A, be generated to the new route of Node B;
Service traffics from node A to Node B switch to described new route by described route stand-by and transmit.
Further, in the described new route switch step, routing convergence is meant that route restrains according to IGP (Interior Gateway Protocol).
According to a further aspect in the invention, provide the direct-connected route backup of a kind of three layer interfaces system.The direct-connected route backup of this three layer interface system comprises:
The route stand-by generation module, this module is used for, to node A route stand-by of direct-connected route generation to Node B;
The route stand-by handover module, this module is used for, and when described direct-connected route breaks down, node A is switched on the described route stand-by to the service traffics of Node B transmit;
New route handover module, this module is used for, and when node A finishes the new route of generation to the routing convergence of Node B after, node A is switched on the described new route to the service traffics of Node B transmit.
Further, described route stand-by is direct-connected route or dynamic routing.
Further, described route stand-by generates by IP FRR mechanism.
Further, described routing convergence is meant that route restrains according to Interior Gateway Protocol.
Beneficial effect of the present invention is:
After the present invention can guarantee main port/link failure, long-time interruption can not take place in that time service traffics before routing convergence is finished, and switching and recovery were switched and can be finished in 50ms owing to lose efficacy, so satisfy client's quality of service requirement on the performance fully, can not cause other problems.Simultaneously, the present invention can be applied in L3VPN (layer 3 Virtual Private Network, the three-layer VPN) field, and is applicable to all types of three layer interfaces, comprises physical port, sub-interface, converges interface etc.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is main and standby relation figure before the link failure and a transmission route map between PE1 and the sGW;
Fig. 2 is the transmission route map during link failure between PE1 and the sGW under the conventional situation;
Fig. 3 is the schematic flow sheet of the direct-connected route backup method of the present invention's three layer interfaces;
Fig. 4 is according to the main and standby relation figure of the inventive method under the link normal condition and transmits route map;
Fig. 5 is according to the inventive method transmission route map during link failure between PE1 and sGW;
Fig. 6 is the structural representation of the direct-connected route backup of the present invention's three layer interfaces system.
Embodiment
Below with reference to accompanying drawing, and be example to the direct-connected route of sGW, describe the specific embodiment of the present invention in detail with PE1.
Fig. 3 is the schematic flow sheet of the direct-connected route backup method of the present invention's three layer interfaces, and as shown in the figure, the direct-connected route backup method of the present invention's three layer interfaces specifically may further comprise the steps:
S302 on host apparatus PE1, carries out IP FRR relevant treatment to the main port that needs protection, and promptly PE1 is set up an alternate routing to the direct-connected route of sGW;
S304, when main port or link appearance inefficacy, host apparatus carries out IP FRR and switches, and soon PE1 switches on the alternate routing from direct-connected route to the service traffics of sGW;
S306 after routing convergence finishes, upgrades new route on the host apparatus, soon PE1 switches on the new route from alternate routing to the service traffics of sGW.
Wherein, step S302 comprises: S3022, and on host apparatus PE1, by IP FRR configuration, for generating a route stand-by to the main of sGW with direct access path (being direct-connected route), this route stand-by can be direct-connected route, also can be dynamic routing; S3024, when main port and link operate as normal, service traffics are normally transmitted along active link.
Step S304 comprises: S3042, and when main port P1down, by IP FRR technology, the route outbound port that host apparatus PE1 will arrive sGW fast switches to backup port P2, thereby guarantees to realize switching fast in 50ms; S3044, before the IGP convergence finished, the service traffics from PE1 to sGW were transmitted along backup IPFRR path.
Step S306 comprises: S3062, and IGP normally restrains; S3064 after the IGP convergence finishes, can be generated to the new route (may be direct-connected route, also may be dynamic routing) of sGW on PE1, the IP route outgoing interface from PE1 to sGW is revised as P2; S3066, the service traffics from PE1 to sGW switch on the new route and transmit.
Particularly, at network environment shown in Figure 4, on PE1, be the backup port of P1 by webmaster or order line configuration P2, wherein, P1, P2 can be physical port, sub-interface, converge various types of three layer interfaces such as interface.
Examples of configurations:
Interface?L3
ip?address?10.1.1.2255.255.255.0
backup?nexthop?20.1.1.2
Wherein 10.1.1.2 is the IP address of P1, and 20.1.1.2 is the IP address that PE2 goes up the interface that directly links to each other with P2.
After carrying out above-mentioned configuration, for the direct-connected route that the PE1 upper outlet is P1, utilize IP FRR technology, can be its route stand-by that to generate an outlet be P2;
Promptly on equipment PE1, two active and standby routes are arranged for L3 interface network segment 10.1.1.0/24:
| → CPU (direct-connected route) primary route
| → 20.1.1.2 alternate routing
Wherein, sGW last with the direct port address of PE1 be 10.1.1.100.
Network environment as shown in Figure 5, after the link between PE1 and the sGW broke down, it was DOWN that PE1 detects port P1 state, caused direct-connected route and carried out IP FRR and switch fast, outgoing interface with route in 50ms points to P2, thereby guarantees that downstream recovers normal in 50ms.
The enterprising walking along the street of PE1 is by convergence, and after convergence finished, PE1 was revised as P2 (new route can be direct-connected route, also can be the dynamic routing of Routing Protocol generation arbitrarily) to the route outgoing interface of sGW, and the IPFRR route backup relation that before forms disappears.
That is: on equipment PE1, has only a route 10.1.1.0/24| → 20.1.1.2 for L3 interface network segment 10.1.1.0/24.
Fig. 6 is the structural representation of the direct-connected route backup of the present invention's three layer interfaces system, and as shown in the figure, the direct-connected route backup of the present invention's three layer interfaces system comprises route stand-by generation module, route stand-by handover module and new route handover module.
Wherein, the route stand-by generation module is used for, according to IP FRR mechanism, to node A route stand-by of direct-connected route generation to Node B.This route stand-by can be direct-connected route or the dynamic routing of Routing Protocol generation arbitrarily.
The route stand-by handover module is used for, and when direct-connected route breaks down, node A is switched on the route stand-by to the service traffics of Node B transmit.
New route handover module is used for, and protocol convergence finishes after the new route of generation according to IGP to the route of Node B as node A, node A is switched on the new route to the service traffics of Node B transmit.
The specific embodiments of the direct-connected route backup of the present invention's three layer interfaces system repeats no more referring to top description to the direct-connected route backup method of the present invention's three layer interfaces herein.
In sum, after the present invention can guarantee main port/link failure, long-time interruption can not take place in that time service traffics before routing convergence is finished, and switching and recovery were switched and can be finished in 50ms owing to lose efficacy, so satisfy client's quality of service requirement on the performance fully, can not cause other problems.
More than be that example specifies technical solution of the present invention with PE1 to the direct-connected route of sGW, for other direct-connected routes, can analogize and obtain embodiment.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the direct-connected route backup method of layer interface is characterized in that, comprises the steps:
Route stand-by generates step, and this step is used for, to node A route stand-by of direct-connected route generation to Node B;
The route stand-by switch step, this step is used for, and when described direct-connected route breaks down, node A is switched on the described route stand-by to the service traffics of Node B transmit;
New route switch step, this step is used for, and when node A finishes the new route of generation to the routing convergence of Node B after, node A is switched on the described new route to the service traffics of Node B transmit.
2. the direct-connected route backup method of three layer interfaces according to claim 1 is characterized in that described route stand-by is direct-connected route or dynamic routing.
3. the direct-connected route backup method of three layer interfaces according to claim 1 is characterized in that, described route stand-by generates step and comprises:
On node A,, generate a route stand-by for described direct-connected route by the quick heavy-route configuration of IP.
4. the direct-connected route backup method of three layer interfaces according to claim 3 is characterized in that, described route stand-by switch step comprises:
When the main port of node A lost efficacy,, the outbound port of the above direct-connected route of node A is switched to backup port by main port by the IP rapid rerouting mechanism;
Before node A finished to the routing convergence of Node B, the service traffics from node A to Node B were transmitted along described route stand-by.
5. the direct-connected route backup method of three layer interfaces according to claim 1 is characterized in that, described new route switch step comprises:
Node A normally restrains to the route of Node B;
After routing convergence finishes, on node A, be generated to the new route of Node B;
Service traffics from node A to Node B switch to described new route by described route stand-by and transmit.
6. according to the direct-connected route backup method of each described three layer interfaces in the claim 1 to 5, it is characterized in that in the described new route switch step, routing convergence is meant that route restrains according to Interior Gateway Protocol.
7. the direct-connected route backup of a layer interface system is characterized in that, comprising:
The route stand-by generation module, this module is used for, to node A route stand-by of direct-connected route generation to Node B;
The route stand-by handover module, this module is used for, and when described direct-connected route breaks down, node A is switched on the described route stand-by to the service traffics of Node B transmit;
New route handover module, this module is used for, and when node A finishes the new route of generation to the routing convergence of Node B after, node A is switched on the described new route to the service traffics of Node B transmit.
8. the direct-connected route backup of three layer interfaces according to claim 7 system is characterized in that described route stand-by is direct-connected route or dynamic routing.
9. according to claim 7 or the direct-connected route backup of 8 described three layer interfaces system, it is characterized in that described route stand-by generates by the IP rapid rerouting mechanism.
10. according to claim 7 or the direct-connected route backup of 8 described three layer interfaces system, it is characterized in that described routing convergence is meant that route restrains according to Interior Gateway Protocol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101196010A CN102201987A (en) | 2011-05-10 | 2011-05-10 | Layer 3 interface connected route backup method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101196010A CN102201987A (en) | 2011-05-10 | 2011-05-10 | Layer 3 interface connected route backup method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102201987A true CN102201987A (en) | 2011-09-28 |
Family
ID=44662388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101196010A Pending CN102201987A (en) | 2011-05-10 | 2011-05-10 | Layer 3 interface connected route backup method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102201987A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051538A (en) * | 2012-12-27 | 2013-04-17 | 华为技术有限公司 | Method, control equipment and system for generating ARP (Address Resolution Protocol) table entry |
| CN103634209A (en) * | 2013-09-13 | 2014-03-12 | 华为技术有限公司 | Method and equipment for data transmission |
| WO2016112656A1 (en) * | 2015-01-12 | 2016-07-21 | 中兴通讯股份有限公司 | Service processing method and device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860492A (en) * | 2010-06-28 | 2010-10-13 | 中兴通讯股份有限公司 | Quick switching method, device and system |
-
2011
- 2011-05-10 CN CN2011101196010A patent/CN102201987A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860492A (en) * | 2010-06-28 | 2010-10-13 | 中兴通讯股份有限公司 | Quick switching method, device and system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051538A (en) * | 2012-12-27 | 2013-04-17 | 华为技术有限公司 | Method, control equipment and system for generating ARP (Address Resolution Protocol) table entry |
| CN103051538B (en) * | 2012-12-27 | 2015-07-08 | 华为技术有限公司 | Method, control equipment and system for generating ARP (Address Resolution Protocol) table entry |
| CN103634209A (en) * | 2013-09-13 | 2014-03-12 | 华为技术有限公司 | Method and equipment for data transmission |
| CN103634209B (en) * | 2013-09-13 | 2017-02-08 | 华为技术有限公司 | Method and equipment for data transmission |
| US10298487B2 (en) | 2013-09-13 | 2019-05-21 | Huawei Technologies Co., Ltd. | Method and device for transmitting data |
| US10819623B2 (en) | 2013-09-13 | 2020-10-27 | Huawei Technologies Co., Ltd. | Method and device for transmitting data |
| WO2016112656A1 (en) * | 2015-01-12 | 2016-07-21 | 中兴通讯股份有限公司 | Service processing method and device |
| CN105847138A (en) * | 2015-01-12 | 2016-08-10 | 中兴通讯股份有限公司 | Business processing method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102664788B (en) | CE dual-homed link protection method in MPLS L3VPN and system thereof | |
| US9264302B2 (en) | Methods and systems with enhanced robustness for multi-chassis link aggregation group | |
| KR101895092B1 (en) | Mpls fast re-route using ldp (ldp-frr) | |
| CN100450039C (en) | Fast convergence method and device of the end-to-end service | |
| CN102857422B (en) | System and method for realizing OLT voice double upper-link protection based on OSPF routing protocol | |
| JP4729119B2 (en) | Communication device in label switching network | |
| CN102571426B (en) | Double-homing protection method and device | |
| CN102325037B (en) | A kind of changing method of pseudo-line dual homed network, system and dual-homed Provider Equipment | |
| CN102364900B (en) | Based on the data transmission method of FRR and equipment in a kind of IRF system | |
| CN101217457A (en) | A method to realize fast reroute and router | |
| CN102638389A (en) | Redundancy backup method and system of TRILL (Transparent Interconnection over Lots of Links) network | |
| JP2010518710A (en) | Method and system for high-reliability processing in networking of a Metro Ethernet network providing multi-functional services | |
| CN102244609B (en) | Solve VPLS and access method and the router that L3 failover causes stopping | |
| US9288140B2 (en) | Multichassis failover and recovery for MLPPP wireless backhaul | |
| EP3217608B1 (en) | Switchback delay methods and devices | |
| CN101364927A (en) | Method, apparatus and system realizing fault recovery of virtual private network | |
| CN101771577A (en) | Method, system and equipment for establishing bidirectional forwarding detection (BFD) for bidirectional LSP | |
| CN102142948A (en) | Data forwarding method, device and system | |
| CN108337161A (en) | Method for smoothly switching M L AG interface fault three-layer data flow | |
| WO2013010422A1 (en) | Share-path-based ring network tunnel configuration method, ring network protection method and system | |
| CN105591800A (en) | Traffic protection method and device | |
| WO2011147299A1 (en) | Fast reroute method and apparatus in layer-2 virtual private network | |
| CN102932247A (en) | VPN (Virtual Private Network) fast rerouting method and device and provider edge device | |
| CN103490951A (en) | Bidirectional forwarding detection method in multi-hop link on basis of BFD | |
| CN101299722A (en) | Improved quick rerouting method and network equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110928 |