CN100446476C - Method and apparatus for communicating network trouble dtecting result - Google Patents
Method and apparatus for communicating network trouble dtecting result Download PDFInfo
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- CN100446476C CN100446476C CNB2006101040694A CN200610104069A CN100446476C CN 100446476 C CN100446476 C CN 100446476C CN B2006101040694 A CNB2006101040694 A CN B2006101040694A CN 200610104069 A CN200610104069 A CN 200610104069A CN 100446476 C CN100446476 C CN 100446476C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
Abstract
The invention discloses a method and device for intercommunicating network failure detection results, belonging to the network management field, giving a method of establishing state relation between two adjacent links and corresponding the state relation to detection instance list of corresponding links, effectively solving the intercommunicating problem of network failure detection results. And the device implements intercommunication of network failure detection results.
Description
Technical field
The present invention relates to field of network management, particularly a kind of method and apparatus of communicating network trouble dtecting result.
Background technology
Ethernet technology is simple and easy to can improve constantly with, cheap and bandwidth, be in enterprise network, metropolitan area network, wide area network scope, all to have obtained large-scale application as a kind of business or as a kind of network configuration, it is more weak that but ability can be safeguarded, can be runed to traditional ethernet, the scope of promoting along with Ethernet enlarges gradually, demand to Ethernet OAM (Operations, Administration and Maintenance, Operations, Administration and Maintenance) function is also more and more stronger.But the OAM technology is a kind of technology that can operate maintenance function that provides, and it can detect automatically to the various inefficacies in the network, takes corresponding remedial measure then, avoids the expansion of fault or eliminates the negative effect that fault is brought as far as possible.
PWE3 (Pseudo Wire Emulation Edge-to-Edge Pseudo Wire Emulation Edge-to-Edge) originally was called Martigny draft (Martini Draft), be a kind of two layer service bearing technologies end to end, its original intention is to go up the emulation Ethernet at MPLS (exchange of Multi Protocol LabelSwitching multi protocol label).PWE3 goes up the mechanism of the various point to point service, PTP of simulation at packet switching network (Packet Switched NetworkPSN), the business that simulated can be TDM (Time Division Multiplex time division multiplexing) special line, ATM (Asynchronous Transfer Mode asynchronous transfer mode), FR (Frame Relay frame relay) or Ethernet etc., PWE3 utilizes the tunneling mechanism on the PSN to simulate a kind of necessary attribute of business, and the tunnel here is called dummy line (Pseudo Wire PW).PWE3 can encapsulate the protocol Data Unit (Protocol Data UnitPDU) of special services, and PDU contains necessary data of emulation special services and control information in the inside.Operator uses PWE3 mechanism all transport services can be transferred among the network of a fusion, as the IP/MPLS network, from user's angle, can think that the dummy line of PWE3 simulation is a kind of link or circuit of special use.
802.1ag ETHOAM (Operations, Administration and Maintenance of Ethernet) can solve Ethernet OAM problem end to end, but also can cross over a plurality of bridge nodes, be the OAM that can distinguish VLAN (VLAN), 802.1ag the fault detection capability of ETHOAM is realized by continuity detection messages (CCM-Continuity Check Message), major function comprises: fault detection capability, fault recognition function (Ping), fault location and isolation features (TraceRoute), signalling trouble and alarm inhibit feature.
The BFD detection technique can solve the PW fault detection problem, BFD (the two-way forwarding of Bidirectional Forwarding Detection detects) detection technique makes it obtain using widely in the fault detect of pseudo wire emulation because it has advantages such as testing mechanism is simple, flexibility is strong, versatility is good.BFD for PW is a kind of as PW fault detect mode, and its fault detect realizes by detecting hello packet.
The network architecture of the ETH PWE3 on a basis as shown in Figure 1, set up PW between customer edge (Customer Edge) CE1 and the CE2, insert with Ethernet respectively between CE1, CE2 and supplier edge (Provider Edge) PE1, the PE2, here we do not distinguish the concrete signaling realization of PW, only simply are seen as PE1 to a PW is arranged between the PE2.In order to be switched to other link apace when the fault, need find fault apace at present.Ethernet link between CE1 and the PE1 can be carried out quick fault testing by the malfunction monitoring mechanism of 802.1ag ETHOAM, we carry out quick fault testing by BFD for PW detection technique PW, and are the same with the testing mechanism between CE1 and the PE1 between CE2 and the PE2.So, AC (Attachment Circuit) link and PW link can both carry out independently quick fault testing, but how PW link failure detection result is announced the link to AC, how the AC link failure detection result with far-end announces the side to PW, further notify near-end again, thereby realize fast detecting end to end, this is a problem that letter is to be solved.
Summary of the invention
In order to solve the problem of communicating network trouble dtecting result, the present invention proposes a kind of state relation of setting up two adjacent link, and the index of described association is corresponded to method on the detection example table of respective link, described method comprises the state relation of setting up two adjacent link, and the index of described association corresponded on the detection example table of respective link, and carry out following steps:
Steps A: link is detected, after finding link failure, search corresponding state relation table according to the detection example table on the described link with the corresponding relation of the index of described state relation, the mode bit of link is set to error condition described in the described state relation table; Step B: before the adjacent link transmission detection messages to described link, check the state of this link according to the state relation of described two adjacent link;
Step C: if the mode bit of described link is an error condition, the detection messages that contains the error flag position is set, and sends detection messages to described adjacent link.
The described state relation of setting up two adjacent link specifically comprises: set up the state relation table of linear directory on the public data area of two adjacent link, and described state relation table is corresponded on the detection example table of respective link.
The described state relation of setting up two adjacent link specifically comprises: the index of the detection example table of interpolation adjacent link and the mode bit of adjacent link in the detection example table of link.
Described network is an ether PWE3 network, and described two adjacent links are PW link and AC link.
The present invention also provides a kind of communicating network trouble dtecting result device, and described device comprises that initialization module, link detecting module, mode bit are provided with module, mode bit is checked module, detection messages sending module;
Described initialization module is used to set up the state relation of two adjacent link, and the index of described association is corresponded on the detection example table of respective link;
Described link detecting module is used to detect described Link State, and described Link State is sent to described mode bit module is set;
Described mode bit is provided with module and is used to receive the Link State that described link detecting module sends, after finding link failure, search corresponding state relation table according to the detection example table on the described link, the mode bit of this link is set to error condition in the described state relation table;
Described mode bit checks that module is used for the adjacent link of described link is sent before the detection messages, checks the state of this link according to the state relation of described two adjacent link, and the state of described link is sent to described detection messages sending module;
Described detection messages sending module is used to receive the state that described mode bit is checked this link that module sends, if the mode bit of described link is an error condition, the detection messages that contains the error flag position is set, and sends detection messages to described adjacent link.
Described initialization module is that state table is set up relating module, is used for setting up on the public data area of two adjacent link the state relation table of linear directory, and the index of described state relation table is corresponded on the detection example table of respective link;
Described initialization module is the link monitoring module, is used for adding the index of detection example table of adjacent link and the mode bit of adjacent link at the detection example table of link.
Technical solutions according to the invention have solved the problem of communicating network trouble dtecting result effectively.
Description of drawings
Fig. 1 is an ETH PWE3 network architecture diagram;
Fig. 2 is the method flow diagram of the embodiment of the invention 1;
Fig. 3 is the method flow diagram of the embodiment of the invention 2;
Fig. 4 is the method flow diagram of the embodiment of the invention 3;
Fig. 5 is the method flow diagram of the embodiment of the invention 4;
Fig. 6 is the structure drawing of device of communicating network trouble dtecting result of the present invention.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Referring to Fig. 1, the 802.1ag ETHOAM that adopts between CE and the PE is owing to being the mode that the AC both link ends sends CCM (Continuity Check Message) message mutually continuously, so the network architecture of ETH PWE3 is a symmetry model.The control aspect of present most of router is separated with forwarding plane, the detection that BFD for PW and ETH OAM carry out is all finished by forwarding plane, in order to reach the purpose that control aspect and forwarding plane consistency and while fast detecting are switched, BFD for PW needs the directly relevant link-state list of change of Forwarding plane with the detected fault of ETH OAM, and send the control aspect simultaneously.In this case, just need carry out some processing, to realize fast detecting intercommunication end to end at intersection (PE1, PE2).
The present invention proposes a kind of PW that a bracing cable sex cords draws and state table of AC on the public data area of PW link and AC link intersection, set up, and the index of PW and AC state table is associated with on the example table that corresponding BFD and ETHOAM detect, ETHOAM and BFD will arrive the mode bit of checking PW or AC in corresponding PW and the AC state table when detecting, send the method for detection messages according to the result of PW or AC mode bit, can realize the intercommunication of fault detect result between PW and the ETH by this method simply.
Embodiment 1
Referring to Fig. 1 and Fig. 2, when the PW link breaks down, promptly PE1 does not receive the hello packet that PE2 sends, and receives that perhaps the mode bit that PE2 sends is the hello packet of DOWN, the fault detect result need be announced the link to AC, and its concrete steps are as follows:
Step 101: the public data area on PE1 and PE2 is set up PW and the AC state table that a bracing cable sex cords draws respectively, and the index of its state table is associated with respectively on the example table that corresponding BFD detects and ETHOAM detects;
Step 102: adopt the BFD detection technique that link PW is detected, the link that detects between PE1 and the PE2 breaks down;
Step 103:PE arrives its corresponding PW and AC state table according to the state table indexed search that BFD detects on the example table, and PW mode bit wherein is set to DOWN;
Step 104: adopt the ETHOAM detection technique that the AC link is detected, PE arrives its corresponding PW and AC state table according to the state table indexed search that ETHOAM detects on the example table, PE checks PW that it is corresponding and the PW mode bit in the AC state table, sends respectively to CE1 and CE2 according to the PW mode bit that to contain the RDI flag bit be 1 CCM message;
Step 105:CE1 and CE2 receive that having the RDI flag bit is behind 1 the CCM message, just know that link puts barrier, and if any backup link, CE1 and CE2 just switch to backup link apace so, otherwise the report link breaks down.
Embodiment 2
Referring to Fig. 1 and Fig. 3, when far-end AC link (link between PE2 and the CE2) breaks down, be that PE2 does not receive the CCM message that CE2 sends, perhaps receive the CCM message that has the RDI flag bit that CE2 sends, the fault detect result is announced to near-end AC link (link between PE1 and the CE1), and its concrete steps are as follows:
Step 201: the public data area on PE1 and PE2 is set up PW and the AC state table that a bracing cable sex cords draws respectively, and the index of its state table is associated with respectively on the example table that corresponding BFD detects and ETHOAM detects;
Step 202: adopt the ETHOAM detection technique that far-end AC link is detected, the link that detects between PE2 and the CE2 breaks down;
Step 203:PE2 arrives its corresponding PW and AC state table according to the PW on the ETHOAM detection example table and the indexed search of AC state table, and the AC mode bit in the state table is set to DOWN;
Step 204: adopt the BFD detection technique that the PW link is detected, PE2 arrives its corresponding PW and AC state table according to the state table indexed search that BFD detects on the example table, PE2 checks PW that it is corresponding and the AC mode bit in the AC state table, sends the hello packet that contains cascade path failure diagnosis will to PE1 according to the AC mode bit;
After step 205:PE1 received the hello packet that contains cascade path failure diagnosis will, PE1 arrived its corresponding PW and AC state table according to the state table indexed search that BFD detects on the example table, and PW mode bit wherein is set to DOWN;
Step 206: adopt the ETHOAM detection technique that near-end AC link is detected, PE1 arrives its corresponding PW and AC state table according to the PW on the ETHOAM detection example table and the indexed search of AC state table, PE1 checks PW that it is corresponding and the PW mode bit in the AC state table, sends to CE1 according to the PW mode bit that to have the RDI flag bit be 1 CCM message;
Step 207:CE1 receives that to have the RDI flag bit be behind 1 the CCM message, just to know that link has fault, and if any backup link, CE1 just switches on the backup link apace so, otherwise the report link breaks down.
In technical solutions according to the invention, can also in PW and AC state table, deposit more flag bit, for example: PWdown for expire, PW down for neighbor, PW down for AC, AC down for expire, AC down forRDI, AC down for PW, position like this by checking that PW and AC state table can fault location take place.In addition, when ETHOAM and BFD detected link-recovery, link AC or the state of PW in PW and AC state table that be responsible for respectively oneself detecting changed UP into.
The invention allows for a kind of on PE equipment the corresponding relation by AC and PW, set up ETHOAM that monitors AC and the direct corresponding relation that monitors the BFD of PW, can realize that equally ether PWE3 network failure detects the method for intercommunication.
Embodiment 3
Referring to Fig. 1 and Fig. 4, when the PW link breaks down, promptly PE1 does not receive the hello packet that PE2 sends, and receives that perhaps the mode bit that PE2 sends is the hello packet of DOWN, and the fault detect result is announced the link to AC, and its concrete steps are as follows:
Step 301: detect the index that adds BFD detection example table in the example table at the ETHOAM of AC link, and the PW mode bit;
Step 302: detect the index that adds ETHOAM detection example table in the example table at the BFD of PW link, and the AC mode bit;
Step 303: adopt the BFD detection technique that link PW is detected, the link that detects between PE1 and the PE2 breaks down, PE1 and PE2 search its corresponding ETHOAM detection example table respectively according to the index that BFD detects the ETHOAM detection example table in the example table, and the PW mode bit that ETHOAM detects in the example table is set to DOWN;
Step 304: adopt the ETHOAM detection technique that the AC link is detected, PE1 and PE2 check that its corresponding ETHOAM detects the PW mode bit in example table, send respectively to CE1 and CE2 according to the PW mode bit that to contain the RDI flag bit be 1 CCM message;
Step 305:CE1 and CE2 receive that having the RDI flag bit is behind 1 the CCM message, just to know that link has fault, and if any backup link, CE1 and CE2 just switch to backup link apace so, otherwise the report link breaks down.
Embodiment 4
Referring to Fig. 1 and Fig. 5, when far-end AC link (link between PE2 and the CE2) breaks down, be that PE2 does not receive the CCM message that CE2 sends, perhaps receive the CCM message that has the RDI flag bit that CE2 sends, the fault detect result is announced to near-end AC link (link between PE1 and the CE1), and its concrete steps are as follows:
Step 401: detect the index that adds BFD detection example table in the example table at the ETHOAM of AC link, and the PW mode bit;
Step 402: detect the index that adds ETHOAM detection example table in the example table at the BFD of PW link, and the AC mode bit;
Step 403: adopt the ETHOAM detection technique that far-end AC link is detected, the link that detects between PE2 and the CE2 breaks down, PE2 detects the example table indexed search to its corresponding BFD detection example table according to the BFD that ETHOAM detects in the example table, and the AC mode bit that BFD detects in the example table is set to DOWN;
Step 404: adopt the BFD detection technique that link PW is detected, PE2 checks that its corresponding BFD detects the AC mode bit in the example table, sends the hello packet that contains cascade path failure diagnosis will to PE1 according to the AC mode bit;
After step 405:PE1 receives the hello packet that contains cascade path failure diagnosis will, PE1 detects the example table indexed search to its corresponding ETHOAM detection example table according to the ETHOAM that BFD detects in the example table, and the PW mode bit that ETHOAM detects in the example table is set to DOWN;
Step 406: adopt the ETHOAM detection technique that near-end AC link is detected, PE1 checks that its corresponding ETHOAM detects the PW mode bit in example table, sends to CE1 according to the PW mode bit that to have the RDI flag bit be 1 CCM message;
Step 407:CE1 receives that to have the RDI flag bit be behind 1 the CCM message, just to know that link has fault, and if any backup link, CE1 just switches on the backup link apace so, otherwise the report link breaks down.
Referring to Fig. 6, the present invention also provides a kind of communicating network trouble dtecting result device, and described device comprises that initialization module, link detecting module, mode bit are provided with module, mode bit is checked module, detection messages sending module;
Described initialization module is used to set up the state relation of two adjacent link, and described association is corresponded on the detection example table of respective link;
Described link detecting module is used to detect described Link State, and described Link State is sent to described mode bit module is set;
Described mode bit is provided with module and is used to receive the Link State that described link detecting module sends, find link failure after, according to the state of the described link of correspondence setting of detection example table on the described link and described state relation;
Described mode bit checks that module is used for the adjacent link of described link is sent before the detection messages, checks the state of this link according to the state relation of described two adjacent link, and the state of described link is sent to described detection messages sending module;
Described detection messages sending module is used to receive the state that described mode bit is checked this link that module sends, and according to the state of this link detection messages is set, and sends detection messages to described adjacent link.
Described initialization module is that state table is set up relating module, is used for setting up on the public data area of two adjacent link the state relation table of linear directory, and described state relation table is corresponded on the detection example table of respective link;
Described mode bit is provided with module and is used to receive the Link State that described link detecting module sends, after finding link failure, search corresponding state relation table according to the detection example table on the described link, the mode bit of this link is set to error condition in the described state relation table;
Described mode bit checks that module is used for the adjacent link of described link is sent before the detection messages, check the state of this link according to the state relation table on the public data area of described two adjacent link, and the state of described link is sent to described detection messages sending module;
Described detection messages sending module is used to receive the state that described mode bit is checked this link that module sends, if the mode bit of described link is an error condition, the detection messages that contains the error flag position is set then, and sends detection messages to described adjacent link.
Described initialization module is the link monitoring module, is used for adding the index of detection example table of adjacent link and the mode bit of adjacent link at the detection example table of link;
Described mode bit is provided with module and is used to receive the Link State that described link detecting module sends, after finding link failure, search adjacent link according to the detection example table on this link and detect example table, and the mode bit of this link is set to error condition in the described adjacent link detection example table;
Described mode bit checks that module is used for the adjacent link of described link is sent before the detection messages, checks that described adjacent link detects the state of this link in the example table, and the state of described link is sent to described detection messages sending module;
Described detection messages sending module is used to receive the state that described mode bit is checked this link that module sends, if the mode bit of described link is an error condition, the detection messages that contains the error flag position is set then, and sends detection messages to described adjacent link.
Above-described embodiment is more preferably embodiment a kind of of the present invention, and the common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacing all should be included in protection scope of the present invention.
Claims (7)
1. the method for a communicating network trouble dtecting result is characterized in that, sets up the state relation of two adjacent link, and the index of described association is corresponded on the detection example table of respective link, and carries out following steps:
Steps A: link is detected, after finding link failure, search corresponding state relation table according to the detection example table on the described link with the corresponding relation of the index of described state relation, the mode bit of link is set to error condition described in the described state relation table;
Step B: before the adjacent link transmission detection messages to described link, check the state of this link according to the state relation of described two adjacent link;
Step C: if the mode bit of described link is an error condition, the detection messages that contains the error flag position is set, and sends detection messages to described adjacent link.
2. the method for communicating network trouble dtecting result as claimed in claim 1 is characterized in that, the described state relation of setting up two adjacent link specifically comprises:
On the public data area of two adjacent link, set up the state relation table of linear directory, and the index of described state relation table is corresponded on the detection example table of respective link.
3. the method for communicating network trouble dtecting result as claimed in claim 1 is characterized in that, the described state relation of setting up two adjacent link specifically comprises:
The index of the detection example table of interpolation adjacent link and the mode bit of adjacent link in the detection example table of link.
4. as the method for claim 1,2 or 3 described communicating network trouble dtecting results, it is characterized in that described network is an ether PWE3 network, described two adjacent links are PW link and AC link.
5. a communicating network trouble dtecting result device is characterized in that,
Described device comprises that initialization module, link detecting module, mode bit are provided with module, mode bit is checked module, detection messages sending module;
Described initialization module is used to set up the state relation of two adjacent link, and the index of described association is corresponded on the detection example table of respective link;
Described link detecting module is used to detect described Link State, and described Link State is sent to described mode bit module is set;
Described mode bit is provided with module and is used to receive the Link State that described link detecting module sends, after finding link failure, search corresponding state relation table according to the detection example table on the described link, the mode bit of this link is set to error condition in the described state relation table;
Described mode bit checks that module is used for the adjacent link of described link is sent before the detection messages, checks the state of this link according to the state relation of described two adjacent link, and the state of described link is sent to described detection messages sending module;
Described detection messages sending module is used to receive the state that described mode bit is checked this link that module sends, if the mode bit of described link is an error condition, the detection messages that contains the error flag position is set, and sends detection messages to described adjacent link.
6. communicating network trouble dtecting result device as claimed in claim 5 is characterized in that,
Described initialization module is that state table is set up relating module, is used for setting up on the public data area of two adjacent link the state relation table of linear directory, and the index of described state relation table is corresponded on the detection example table of respective link.
7. communicating network trouble dtecting result device as claimed in claim 5 is characterized in that,
Described initialization module is the link monitoring module, is used for adding the index of detection example table of adjacent link and the mode bit of adjacent link at the detection example table of link.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101040694A CN100446476C (en) | 2006-08-02 | 2006-08-02 | Method and apparatus for communicating network trouble dtecting result |
| PCT/CN2007/001267 WO2008017223A1 (en) | 2006-08-02 | 2007-04-18 | Method, apparatus and network for intercommunicating failure detecting results |
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| CNB2006101040694A CN100446476C (en) | 2006-08-02 | 2006-08-02 | Method and apparatus for communicating network trouble dtecting result |
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| CN100466564C (en) * | 2007-04-02 | 2009-03-04 | 华为技术有限公司 | Failure monitoring method and device of the virtual rented line |
| US8593973B2 (en) * | 2010-03-09 | 2013-11-26 | Juniper Networks, Inc. | Communicating network path and status information in multi-homed networks |
| CN101938419A (en) * | 2010-09-10 | 2011-01-05 | 中兴通讯股份有限公司 | Link state delivery method and device of packet transport network |
| CN102185712B (en) * | 2011-04-29 | 2015-10-21 | 中兴通讯股份有限公司 | The reverse method of VPLS network and ethernet ring network and device |
| CN102843249B (en) * | 2011-06-21 | 2018-09-18 | 南京中兴新软件有限责任公司 | The method and apparatus that maintenance management state is transmitted in a kind of grouping conveying network |
| CN106972951B (en) * | 2017-02-27 | 2019-11-08 | 杭州天宽科技有限公司 | A kind of automatic maintenance implementation method based on multiple related function module abnormality detections |
| CN107360173B (en) * | 2017-07-25 | 2019-08-13 | 成都西加云杉科技有限公司 | Resource access method and device |
| CN115065614B (en) * | 2022-06-22 | 2023-10-13 | 杭州云合智网技术有限公司 | Method for identifying multi-activity service connectivity of VPWS |
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| JP2003324438A (en) * | 2002-05-08 | 2003-11-14 | Nec Corp | Ethernet(r) communication device |
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| US7016313B1 (en) * | 2001-06-28 | 2006-03-21 | Cisco Technology, Inc. | Methods and apparatus for generating network topology information |
| US20030202473A1 (en) * | 2002-04-25 | 2003-10-30 | General Instrument Corporation | Traffic network flow control using dynamically modified metrics for redundancy connections |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003324438A (en) * | 2002-05-08 | 2003-11-14 | Nec Corp | Ethernet(r) communication device |
| CN1492623A (en) * | 2002-10-22 | 2004-04-28 | 华为技术有限公司 | Method for realizing link state feed-through in network |
| CN1681254A (en) * | 2004-04-08 | 2005-10-12 | 华为技术有限公司 | Maintaining method of Ethernet link state |
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| US20060098581A1 (en) * | 2004-11-05 | 2006-05-11 | Cisco Technology, Inc. | Method and apparatus for conveying link state information in a network |
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| CN1905482A (en) | 2007-01-31 |
| WO2008017223A1 (en) | 2008-02-14 |
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