CN101631088A - Method and device for processing link failure - Google Patents
Method and device for processing link failure Download PDFInfo
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- CN101631088A CN101631088A CN200910166178A CN200910166178A CN101631088A CN 101631088 A CN101631088 A CN 101631088A CN 200910166178 A CN200910166178 A CN 200910166178A CN 200910166178 A CN200910166178 A CN 200910166178A CN 101631088 A CN101631088 A CN 101631088A
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Abstract
The invention discloses a method and a device for processing a link failure, wherein a link with failure is a link shared by a plurality of loops. The method comprises the following steps: optionally selecting one port from one or a plurality of other ports except a port corresponding to the link in ports corresponding to each node of nodes at two ends of the link to enable flow to pass through; and blocking one or a plurality of other ports except the optionally selected port. The technical scheme solves the problem of not avoiding and not solving flow loop closure by adopting the prior ZESR technology when a plurality of loops share one link in the prior art, can solve the problem of flow loop closure when adopting the ZESR technology, and can meet the requirement of high reliability of a network operator to Internet.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of link failure processing method and device.
Background technology
Along with the extensive use of Ethernet in metropolitan area network; the scale of double layer network is increasing; Virtual network operator is more and more higher to the requirement of the ease of manageability of the reliability of network and network; for example; use Network Management Equipment that network is managed and detects and strict link protection function or the like; therefore, the reliability of Ethernet has become the focus that operator pays close attention to most.In switching network, the main means that improve network reliability are to dispose some redundant links, can use backup link when primary link loses efficacy.Under the situation of using the redundancy backup link; protect networks and recovery capability become key; especially the development of real time business such as voice and data is had higher requirement to the failover capability of network; traditional Ethernet resume speed is slow; need with minute and second calculate, can't reach the requirement of metropolitan area business, in order to address the above problem; in emerging Ethernet ring protection (ZTE Ethernet Smart Ring abbreviates ZESR as) technology arise at the historic moment.
In emerging Ethernet ring protection (ZESR) the belt topological structure that aims at metropolitan area network and local area network (LAN) design, the broadcast storm that the topological structure of can avoiding effectively going in ring causes can back up link again simultaneously, thereby has guaranteed the safety of network.In still being enterprise network, all extensively adopted metropolitan area network at present the Ethernet ring line structure to improve the reliability of network, when the last link of ring disconnects, can enable backup link and recover the communication between each node on the looped network, thereby can guarantee the reliability of network.
The operation principle of ZESR is as follows: in a ring, selecting a switch is host node, and remaining switch is a transmission node.In two ports of host node, one is master port, and another is from port, when initial, gets clogged from port, to avoid loop.When certain transmission node is found certain section own adjacent link fails, to send the LINKDOWN frame to host node, after host node receives LINK DOWN frame, think the ring fault, open, send the FLUSH-DOWN frame from port, upgrade forward direction address (ForwardingData-Base, abbreviate FDB as) table, after other node receives the FLUSH-DOWN frame, refresh the FDB table of oneself.During the ring fault recovery, can stop to send LINK DOWN frame, host node does not receive LINK DOWN frame in a period of time, just think that ring recovers, can block again, send the FLUSH-UP frame from port, upgrade the FDB table, after other node receives the FLUSH-UP frame, refresh the FDB table of oneself.Thereby just finished a loop from fault to the process of recovering.
But at present in order to realize the requirement of Virtual network operator to the high reliability of some particular services, basic monocycle networking can not have been satisfied the requirement of operator, so the networking of many rings of some complexity is also just arisen at the historic moment.The networking of the shared link of a plurality of rings appears through regular meeting in network, and can be referring to Fig. 1.The networking schematic diagram of Fig. 1 flow Cheng Huan during for the shared link of many rings (there is shown two rings).As shown in Figure 1, A, B, C, D, E, F are the networkings of two shared links of ring, opened the ZESR function in two rings, when the link M1 between shared link E, the F is in the forward state, realization principle according to ZESR, can block (block) and fall link M5 and M2, this moment, data traffic was normal, miscellaneous service in the ring is normal, still, and after the M1 link breaks down, realization principle according to ZESR, can open two links of block, at this moment, data traffic process M6-M4-M2-M7-M3-M5 flow Cheng Huan.Therefore, for many rings networking of complexity, it is that existing ZESR technology can't be avoided with insurmountable that flow becomes the ring problem.
Summary of the invention
At in the correlation technique when the shared link of a plurality of rings, adopt existing ZESR technology to avoid and can't solve the problem of flow Cheng Huan and propose the present invention, for this reason, main purpose of the present invention is to provide a kind of improved link failure processing method and device, one of to address the above problem at least.
According to an aspect of the present invention, provide a kind of link failure processing method.
Link failure processing method according to the present invention comprises: an optional port on one or more other ports in each node corresponding port of two end nodes of link except that the link corresponding port so that flow pass through; To block except that one or more other ports the optional port.
According to a further aspect in the invention, provide a kind of link failure processing unit.
Link failure processing unit according to the present invention comprises: selected cell, processing unit, wherein, selected cell is used for optional port on each node corresponding port one or more other ports except that the link corresponding port of two end nodes of link; Processing unit is used to enable optional port so that flow passes through, and will block except that one or more other ports the optional port.
By the present invention, optional port on one or more other ports in each node corresponding port of two end nodes of link except that the link corresponding port; Enable optional port so that flow passes through, will block except that one or more other ports the optional port.Solved in the correlation technique when the shared link of a plurality of rings, can't avoid and can't solve the problem of flow Cheng Huan when adopting existing ZESR technology, and then can when adopting the ZESR technology, solve the problem of flow Cheng Huan.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
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:
The networking schematic diagram of flow Cheng Huan when Fig. 1 is the shared link of many rings;
Fig. 2 is the flow chart according to the link failure processing method of the embodiment of the invention;
Fig. 3 is the group-network construction figure according to the shared link of many rings of the embodiment of the invention;
Fig. 4 is the flow chart of link failure processing method according to the preferred embodiment of the invention;
Fig. 5 is the structured flowchart according to the link failure processing unit of the embodiment of the invention;
Fig. 6 is the structured flowchart of link failure processing unit according to the preferred embodiment of the invention.
Embodiment
Functional overview
Consider in the correlation technique that when the shared link of a plurality of rings adopt existing ZESR technology can't avoid and can't solve the problem of flow Cheng Huan, the embodiment of the invention provides a kind of implementation of avoiding flow Cheng Huan in the network.Increase a joint-action mechanism (or claim trigger equipment) and under physical port, increase the configuration of a VLAN priority, promptly under physical port, can dispose the priority level of VLAN ID, when the link shared when many rings breaks down (down), trigger the VLAN priority attribute of configuration under the port by this joint-action mechanism and enable function, carry out the comparison of VALN priority, select the highest port of VLAN priority so that flow passes through, block the relatively low one or more ports of VLAN priority.Under default situations, have only the VLAN that has disposed VLAN priority just to participate in the comparison of VLAN priority.
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Method embodiment
According to the embodiment of the invention, at first provide a kind of link failure processing method.
Fig. 2 is the flow chart according to the link failure processing method of the embodiment of the invention.As shown in Figure 2, the link failure processing method according to the embodiment of the invention comprises following processing (step S201-step S203):
Step S201: optional port on one or more other ports in each node corresponding port of two end nodes of link except that the link corresponding port;
Preferably, other port except that the link corresponding port in each node corresponding port in two end nodes of link can be sorted according to default priority orders, and configuration preference level attribute.
Preferably, can select the highest port of priority so that flow passes through according to pre-configured priority attribute on other port except that the link corresponding port in each node corresponding port.
Step S203: will block except that one or more other ports the optional port.
Preferably, select the highest port of priority so that flow by the time, also one or more other ports except that the highest port of priority should be blocked.
In specific implementation process, can be described with reference to Fig. 3.
Fig. 3 is the group-network construction figure according to the shared link of many rings of the embodiment of the invention.Wherein, in this networking, HOST is a Network Management Equipment, mainly finishes all devices in the network is monitored, and HOST equipment is hung router down, router device has been used Virtual Router Redundacy Protocol (Virtual Router Redundancy Protocol, abbreviate VRRP as), the effect of this agreement is to provide route backup to the webmaster flow to NM server, router device is hung switch device down, be respectively A, B, three network areas of C, all enabled the ZESR function.The webmaster service traffics of HOST Network Management Equipment and A, B, three network areas of C in same VLAN 20, but A, B, above the C independent data service flow and webmaster business in different VLAN.Belong to VLAN30 such as A, B belongs to VLAN40.The webmaster service traffics are walked different VLAN with the data service flow.The Link State of M1 is forward in networking, 3 ports have been blocked, correspond to respectively in Fig. 3: block1, block2 and block3, data traffic and webmaster flow all transmit normally, all do not have loop to produce in webmaster service VLAN 20 and data streaming service VLAN30, the VLAN40.The great advantage of above-mentioned networking be to the data business realizing good link backup and link protection; the flow that can not cause the whole network because of Single Point of Faliure; good network management monitoring and protection have also been realized simultaneously; when the primary link that connects webmaster wherein any one when going wrong; VRRP can switch route in real time, has guaranteed the real-time of webmaster monitoring.
But; also there is a fatal shortcoming in above-mentioned redundancy protecting; when M1 Link State down; realization principle according to ZESR; can open block1 and block2, this moment, the protocol interaction message of VRRP will pass through M7-M4-M5-M6-M3-M2, and the flow of webmaster business has become loop; cause network paralysis, also can't monitor by Network Management Equipment.
Become the ring problem at the flow of describing among Fig. 3, can adopt following processing:
(1) VLAN of configured port (Virtual Local Area Network abbreviates VLAN as) attribute on M5 and M4 link corresponding physical port respectively;
(2) configuration makes the VLAN priority of the corresponding port of M5 link be higher than the VLAN priority of the corresponding port of M4 link; And configuration makes the VLAN priority of the corresponding port of M3 link be higher than the VLAN priority of the corresponding port of M2 link.
Preferably, the VLAN priority that the VLAN priority of the corresponding port of M5 (M3) link is higher than the corresponding port of M4 (M2) link is predefined, in specific implementation process, according to user's request, the VLAN priority that the corresponding port of M4 (M2) link can be set is higher than the VLAN priority of the corresponding port of M5 (M3) link..
(3) when the M1 link breaks down, the VLAN priority attribute function that KEYI1 goes to trigger configuration under the physical port by joint-action mechanism comes into force;
Preferably, above-mentioned joint-action mechanism includes but not limited to trigger equipment.
(4) the VLAN priority of comparison port allows flow pass through from the high VLAN of VLAN priority, blocks the low port of VLAN priority.
Preferably, when the M1 link failure recovery, when promptly M1 link corresponding state is forward, can goes to trigger the VLAN priority feature by joint-action mechanism and lose efficacy.
Preferably, it shown in Fig. 3 the situation of two ring shared link, in specific implementation process, the situation that also may have the shared link of many rings, when shared link lost efficacy, specifically handle as follows: one or more other ports in each node corresponding port of two end nodes of inefficacy link except that the link corresponding port (may for 3 or 3 with upper port) are gone up an optional end so that flow passes through; Preferably, can also go up pre-configured priority attribute, select the highest port of priority so that flow passes through according to other port except that the link corresponding port in each node corresponding port (may for 3 and 3 with upper port).
Fig. 4 is the flow chart of link failure processing method according to the preferred embodiment of the invention.As shown in Figure 4, link failure processing method may further comprise the steps (step S401-step S413) according to the preferred embodiment of the invention:
At first be described in conjunction with Fig. 3, become the ring problem in order to solve the flow of in Fig. 3, describing, needing (for example increases a joint-action mechanism, trigger), under physical port, increase the order of a VLAN priority, whether control this VLAN priority by this joint-action mechanism comes into force, and the condition that triggers this joint-action mechanism most critical is exactly when the M1 link linkdown that breaks down, the VLAN priority feature comes into force, compare the physical port value of the VLAN priority of configuration down, allow the webmaster flow from high the passing through of VLAN priority, block the low port of VLAN priority.When the M1 link failure recovery, when the Link State of M1 was forward, joint-action mechanism triggered priority feature and lost efficacy.Wherein, in above-mentioned processing procedure, the ZESR function comes into force always, and concrete implementation step is as follows.
Step S401: carry out the priority configuration in advance;
For example, on M5 and M4 link corresponding physical port, dispose the VLAN priority of webmaster VLAN respectively, and on M3 and M2 link corresponding physical port the VLAN priority of configuration webmaster VLAN, wherein, the VLAN priority that can dispose the webmaster VLAN of M5 link port correspondence is higher than the VLAN priority of M4 link port webmaster VLAN; The VLAN priority that can dispose the webmaster VLAN of M3 link port correspondence is higher than the VLAN priority of M2 link port webmaster VLAN;
Step S403: judge whether to open the joint-action mechanism switch, if, execution in step S405 then, otherwise the joint-action mechanism function does not come into force;
Step S405: judge whether down of shared link M1, if the link of M1 does not have down (inefficacy), when Link State was forward always, joint-action mechanism was inoperative, thus port down configuration VLAN priority feature do not come into force;
Preferably, when the M1 link breaks down, the state down of M1 link corresponding physical port, joint-action mechanism works, and triggers that pre-configured VLAN priority feature comes into force under the physical port;
Step S407:VLAN priority feature comes into force, and whether the VLAN that detects the physical port configuration has configuration VLAN priority attribute;
Step S409: the VLAN that detects data service flow under the port does not dispose the VLAN priority attribute, and the VLAN priority feature is inoperative, and flow is walked common forwarding process;
Step S411: the VLAN that detects webmaster service traffics under the port has disposed the VLAN priority attribute, relatively the rank of Pei Zhi VLAN priority;
Step S413: the webmaster flow is passed through from the high port of the VLAN priority level of port correspondence, block the low port of VLAN priority.
For example, compare M5 and M4, M3 and the pre-configured VLAN priority of M2.Wherein, if the VLAN priority of M5 greater than the VLAN priority of M4, then makes the webmaster flow pass through from the webmaster VLAN corresponding port of M5 link correspondence, block the webmaster VLAN corresponding port of M4 link correspondence after relatively; Otherwise,, block the webmaster VLAN corresponding port of M5 link correspondence if the VLAN priority of M4 greater than the VLAN priority of M5, then makes the webmaster flow pass through from the webmaster VLAN corresponding port of M4 link correspondence after relatively.
In like manner, if the VLAN priority of M3 greater than the VLAN priority of M2, then makes the webmaster flow pass through from the webmaster VLAN corresponding port of M3 link correspondence, block the webmaster VLAN corresponding port of M2 link correspondence after relatively; Otherwise,, block the webmaster VLAN corresponding port of M3 link correspondence if the VLAN priority of M2 greater than the VLAN priority of M3, then makes the webmaster flow pass through from the webmaster VLAN corresponding port of M2 link correspondence after relatively.
Preferably, under the situation of M1 link failure recovery, when promptly M1 link corresponding physical port status was forward, joint-action mechanism worked, and triggered the physical port VLAN priority feature inefficacy of configuration down;
In specific implementation process, under the situation of M1 link failure recovery, if close the joint-action mechanism switch.Then work as the M1 link and break down,, can not trigger the VLAN priority feature and come into force, thereby also just can't compare VLAN priority, can not control the trend of webmaster flow because the joint-action mechanism switch of the overall situation cuts out.Therefore, need open the joint-action mechanism switch in the overall situation.And no matter whether the switch of joint-action mechanism open, to the function of ZESR without any influence.
By the foregoing description, a kind of link failure processing method is provided, during for the shared link of many rings, when adopting the ZESR technology, can effectively solve the problem of flow Cheng Huan, and can satisfy the requirement of Virtual network operator the network high reliability.
Device embodiment
According to the embodiment of the invention, also provide a kind of link failure processing unit.
Fig. 5 is the structured flowchart according to the link failure processing unit of the embodiment of the invention.Fig. 6 is the structured flowchart of link failure processing unit according to the preferred embodiment of the invention.As shown in Figure 5, the link failure processing unit according to the embodiment of the invention comprises: selected cell 1, processing unit 2 are described below in conjunction with Fig. 6.
Preferably, as shown in Figure 6, selected cell 1 may further include: configuration module 10, selection module 12.Wherein, configuration module 10 is used for configuration preference level attribute on each node corresponding port other port except that the link corresponding port; Select module 12, be connected to configuration module 10, be used for choosing the highest port of priority according to priority attribute.
Preferably, as shown in Figure 6, configuration module 10 may further include: ordering submodule 100, be used for other port except that the link corresponding port in each node corresponding port of two end nodes of link, and sort according to default priority orders; Configuration submodule 102 is connected to ordering submodule 100, is used for the output configuration preference level attribute as a result according to the ordering submodule.
In specific implementation process, the module that above-mentioned each unit and each unit comprise, the workflow of submodule can repeat no more referring to the description among Fig. 2 and Fig. 4 herein.
Pass through the foregoing description, a kind of link failure processing unit is provided, interaction in conjunction with selected cell 1, processing unit 2, in the time of can solving the shared link of a plurality of rings, adopt the problem that to avoid and can't solve flow Cheng Huan when having the ZESR technology now, and then can when adopting the ZESR technology, solve the problem of flow Cheng Huan effectively.
In sum, by the above embodiment of the present invention, the link failure processing scheme that provides, during for the shared link of many rings, when adopting the ZESR technology, can effectively solve the problem of flow Cheng Huan, and can satisfy the requirement of Virtual network operator the network high reliability.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
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 (7)
1. link failure processing method, wherein, the link that breaks down is the shared links of a plurality of loops, it is characterized in that, described method comprises:
An optional port on one or more other ports in each node corresponding port of two end nodes of described link except that described link corresponding port so that flow pass through;
To block except that one or more other ports the described optional port.
2. method according to claim 1 is characterized in that, described method further comprises:
According to pre-configured priority attribute on other port except that described link corresponding port in described each node corresponding port, select the highest port of priority so that flow passes through;
To block except that one or more other ports the highest port of described priority.
3. method according to claim 2, it is characterized in that, pre-configured priority attribute on other port in according to described each node corresponding port except that described link corresponding port, select the highest port of priority so that before flow passed through, described method also comprised:
With other port except that described link corresponding port in each node corresponding port in two end nodes of described link, sort according to default priority orders, and dispose described priority attribute.
4. according to each described method among the claim 1-3, it is characterized in that described method also comprises:
In running, emerging Ethernet ring protection ZESR function in enabling.
5. link failure processing unit, wherein, the link that breaks down is the shared links of a plurality of loops, it is characterized in that, described device comprises:
Selected cell is used for optional port on each node corresponding port one or more other ports except that described link corresponding port of two end nodes of described link;
Processing unit is used to enable optional port so that flow passes through, and will block except that one or more other ports the described optional port.
6. device according to claim 5 is characterized in that, described selected cell comprises:
Configuration module is used for configuration preference level attribute on described each node corresponding port other port except that described link corresponding port;
Select module, be used for choosing the highest port of priority according to described priority attribute.
7. device according to claim 6 is characterized in that, described configuration module comprises:
The ordering submodule is used for other port except that described link corresponding port in each node corresponding port of two end nodes of described link, sorts according to default priority orders;
The configuration submodule is used for disposing described priority attribute according to the output result of described ordering submodule.
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| CN200910166178A CN101631088A (en) | 2009-08-18 | 2009-08-18 | Method and device for processing link failure |
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| CN200910166178A CN101631088A (en) | 2009-08-18 | 2009-08-18 | Method and device for processing link failure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783836A (en) * | 2009-11-11 | 2010-07-21 | 中兴通讯股份有限公司 | Monitored link switching device, monitored link switching method and network element |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783836A (en) * | 2009-11-11 | 2010-07-21 | 中兴通讯股份有限公司 | Monitored link switching device, monitored link switching method and network element |
| CN101783836B (en) * | 2009-11-11 | 2014-04-09 | 中兴通讯股份有限公司 | Monitored link switching device, monitored link switching method and network element |
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Application publication date: 20100120 |