CN101136865A - Method of implementing service link tracing based on T-MPLS packet transfer network - Google Patents
Method of implementing service link tracing based on T-MPLS packet transfer network Download PDFInfo
- Publication number
- CN101136865A CN101136865A CNA2007101642335A CN200710164233A CN101136865A CN 101136865 A CN101136865 A CN 101136865A CN A2007101642335 A CNA2007101642335 A CN A2007101642335A CN 200710164233 A CN200710164233 A CN 200710164233A CN 101136865 A CN101136865 A CN 101136865A
- Authority
- CN
- China
- Prior art keywords
- mep
- message
- node
- request message
- starting point
- 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
Abstract
In packet transfer network based on T-MPLS technique, the disclosed method can implement link track for tracking user's traffic flow. The method includes following steps: (1) after receiving configuration command of starting up link track (LT) down sent from network management, the starting point maintenance entity point (MEP) initiates LT request; destination address is a MEP address pointed by network management; (2) nodes requested by LT return LT responses back to starting point MEP; (3) based on LT responses, the starting point MEP reports link information to network management. The method reflects actual connected state of traffic in current T-MPLS network and adjacency relation between nodes effectively. The invention can determine whether prospective traffic flow is matched to actual traffic flow so that network manager can carry out fault analysis and fault location better.
Description
Technical field
The present invention relates to T-MPLS (Transport MPLS, transmit multiprotocol label switching) grouping transmission node business field, relate in particular to implementation method based on T-MPLS OAM (Operation AdministrationMaintenance, operation management maintain) aspect.
Background technology
T-MPLS is a kind of transmission network technology of at present domestic and international communication field extensive concern, and relevant various ITU-T drafts are in ardent discussion and draw up the stage.
Because being the carrier-class core that realizes, transmits the Packet Transport Network of T-MPLS technology, so seem quite important for operation, the maintenance and management of whole network.The OAM draft relevant with the T-MPLS technology also formulated, wherein the description that the ITU-TY.17TOM draft is detailed T-MPLSOAM technology correlative detail and realization.
Though the OAM for T-MPLS has Y.17TOM defined multiple operation, do not provide definition and realize for wherein link tracing LT (Link Trace) function.The present invention has provided the method for a kind of LT of realization in conjunction with the prior art standard.This method has defined the transmission and the reception of LT protocol massages, obtains the actual syntople of required tracking link by the parsing to the LT protocol massages, for service management and fault location provide reference information.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method that realizes link tracing on based on the Packet Transport Network of T-MPLS technology, can effectively implement the tracking that customer service is flowed to.
Core concept of the present invention is, when the user need judge a pair of Local MEP (MEG End Point from network management system, wherein MEG is Maintenance Entity end points Maintenance Entity Group) and distant place MEP between service link whether consistent with the path of expection, when perhaps needing to obtain the actual syntople of service link, the network management system distribution configuration command requires to issue one group of link tracing message from Local MEP, this follows the trail of message by (the Maintenance Entity intermediate point of the MIP on the service link, MEGIntermediate Point) or distant place MEP when receiving, oppositely respond and follow the trail of message, and when responding the tracking message, add inlet and outlet parameter.On Local MEP, by to receiving the parsing of respond following the trail of message, specify syntople MIP and the MEP to a distant place from the Local MEP that obtains that can be complete on the network management system, and this service link actual flow is to situation.
In order to solve the problems of the technologies described above, the invention provides a kind of method of following the trail of based on realization service link on the Packet Transport Network that transmits multiprotocol label switching, may further comprise the steps:
(a) starting point Maintenance Entity end points is that MEP receives after startup link tracing that webmaster issues is the configuration order of LT, initiates the LT request message, and destination address is certain MEP address of webmaster appointment;
(b) described LT request message to node all return the LT response message to starting point MEP, comprise the port information of the node that arrives in the message;
(c) starting point MEP according to the LT response message to webmaster reporting links information.
Further, said method also can have following characteristics, in described step (a), described starting point MEP generates a LT and identifies this request message of unique identification, and should identify fixedly ageing time of existence one when structure LT request message, when ageing time then, this sign is deleted.
Further, said method also can have following characteristics, in described step (b), receive that the node of described LT request message constructs described LT response message according to described LT request message, the destination address of described LT response message is that the MEP address, source of described LT request message is starting point MEP address, and this node port information added among the port TLV in the described LT response message, the LT sign is constant.
Further, said method also can have following characteristics, in described step (c), after described starting point MEP receives the LT response message, the LT sign of extracting in the LT response message is mated with the local LT sign that described starting point MEP safeguards, if the match is successful, then to network management system reporting links information.
Further, said method also can have following characteristics, after described starting point MEP receives the LT response message, judges the legitimacy of this LT response message earlier, if the destination address of current reception message conforms to the MEP address of present node, then think legal LTR message.
Further, said method also can have following characteristics, described link information comprises purpose MEP address, from starting point MEP to purpose MEP each MIP of process and the ingress port information of each MIP.
Further, said method also can have following characteristics, and in described step (a), it is the OAM label that described LT request message also has an operation management maintain, and the message jumping figure in this label is that TTL is set to a fixing discre value; In described step (b), after certain node was received described LT request message, when structure LT response message, TTL was set to another fixedly discre value.
Further, said method also can have following characteristics, in described step (b), when the node of receiving described LT request message is MIP for the Maintenance Entity intermediate point, described MIP judges the legitimacy of described LT request message, if the ttl value of current reception message is predefined fixedly discre value, think that then this LT request message is legal; In described step (b), when the node of receiving described LT request message is that purpose Maintenance Entity end points is when being MEP, described purpose MEP judges the legitimacy of described LT request message, if the destination address of current reception message conforms to the MEP address of present node, think that then this LT request message is legal.
Further, said method also can have following characteristics, and in described step (b), when the Maintenance Entity intermediate point is after MIP receives described LT request message, downstream is transmitted this LT request message of receiving.
The method of the invention is finished jointly by NMS and T-MPLS node, can reflect actual connected state professional in the current T-MPLS network, the syntople of node effectively, can judge to estimate whether professional the flow direction with practical business conforms to, so that the network manager carries out accident analysis and location.
Description of drawings
Fig. 1 is a present embodiment Link Trace process schematic diagram;
Fig. 2 is a present embodiment T-MPLS node networking schematic diagram;
Fig. 3 is that present embodiment LTM protocol massages sends process chart;
Fig. 4 is that present embodiment LTM protocol massages receives and the LTR protocol massages sends process chart;
Fig. 5 is that present embodiment LTR protocol massages receives process chart.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is a present embodiment Link Trace process schematic diagram, sets up as figure T-MPLS node networking business, and integrated network management system NMS (Network Management System) is linked in this network, any T-MPLS node on can supervising the network.T-MPLS A node among the figure relates generally to the flow process of following several parts to finishing link tracing by LTM (Link Trace Message, Linktrace Message) and LTR (Link TraceRespond, link tracing response) between the T-MPLSD node:
The first, the LTM protocol massages sends handling process, as shown in Figure 3, may further comprise the steps:
The LTM message need specify a LT ID sign to come this request message of local unique identification, and this keeps a regularly ageing process after being identified at generation, promptly should identify deleted when the set time arrives.If ageing time expires, LT ID can be deleted, reports the webmaster link may have fault simultaneously.
The T-MPLS OAM label value of LTM message is a fixed value, and it is an OAM message that this label value is used to identify this message, and TTL (Time to Live, the message jumping figure) value in the label is set to fixedly discre value A.
The second, the T-MPLS node device port receives the LTM protocol massages and sends LTR (Link TraceRespond) protocol massages and sends handling process, as shown in Figure 4, may further comprise the steps:
For MIP, if judge that the ttl value of current reception message is certain fixedly discre value A, the A value is by agreement or standard protocol specifies between the T-MPLS node, and the A value is 0 * 02 among Fig. 4, then thinks legal LTM message;
For MEP, conform to the MEP address of present node if judge the destination address of current reception message, think that then this LTM message is legal;
Step 420, T-MPLS node device (MIP or MEP) generates LT back message using LTR, and the port parameter information that this node receives the LTM message added in the LTR message, the destination address of LTR back message using is the MEP address, source in the LTM message, ttl value in the label is revised as fixed value B (the B value is by system's agreement or consensus standard regulation), and sends this LTR message from receiving port;
If receiving the node of LTM protocol massages is MEP, then after step 410 has been verified the legitimacy of this LTM message, no longer transmit the LTM message to other nodes.
The 3rd, the T-MPLS node device port receives LTR protocol massages handling process, as shown in Figure 5, comprises the steps:
If the destination address of LTR is not the address of present node self, then can not enter the handling process of handling LTR.
If there is identical LT ID value, then think a legal LTR response.
Network management system forms the actual syntople information of specifying between the MEP according to the information that the T-MPLS node reports, and perhaps indicates the fault point of link.If certain MIP or MEP have had fault, the initial MEP that initiates LTM can not receive the LTR response of MIP or MEP, promptly knows where break down.
Above-mentioned protocol procedures moves in T-MPLS OAM Maintenance Entity.
As shown in Figure 2, be example with TA, TB, TC, TD node, by between TA to TD node, carrying out the LT operation, illustrate that the present invention realizes the embodiment of LT process in the T-MPLS network.
Specific embodiments comprises following process:
One, the TA node receives the network management configuration order, initiates the LT process, and the network management configuration order informs that node TA destination address is TD, and the TA node initiatively sends LTM message (LTM message structure such as table 1, reference is draft Y.17TOM) from port one;
The LTM message comprises following field at least:
Table 1
| Y.17TOM OAM general message head (wherein type of message is LTM, and T-MPLS abel is a fixed value, and TTL is for fixing 0 * 02) |
| MEP address, source (node TA) |
| Purpose MEP address (node TD) |
| LT ID (by the TA node definition) |
| End TLV (ENMES sign) |
Two, the TB node receives the LTM message that the TA node sends over from port one, construct the LTR back message using immediately, and send from port one, the MEP address, source of copy LTM message is as the destination address of LTR message, with the source address of TB address of node as the LTR message, the modification type of message is LTR, and with TTL (Time to Live, the message jumping figure) value is changed to fixed value 0x01, and other field values are not revised, and local port information is added among the Port TLV, Port TLV is a port information, use TLV (type length value, type, length, value) format identification (FID) information illustrates the descriptor of this port.Simultaneously the TB node judges that the destination address of this LTM message is not a local node, will receive then that the LTM message is intact to forward from port 2;
The LTR message comprises following field at least:
Table 2
| Y.17TOM OAM general message head (wherein type of message is LTR, and T-MPLS Label is a fixed value, and TTL is for fixing 0 * 01) |
| MEP address, source (node TB) |
| Purpose MEP address (node TA) |
| LT?ID |
| Port?TLV |
| ... |
| End?TLV |
The TC node receives the processing procedure of LTM message with TB node processing process, TC is when structure LTR, with the MEP address, source of LTM message is the destination address of node TA address as the LTR message, with the source address of TC address of node as the LTR message, the LTR message that the TC node sends is transmitted by TB, TB can be forwarded to TA automatically and get on, because the purpose of this LTR is TA, TB can not discern this LTR message; It is identical with the TB node process that the TD node receives LTM message processing procedure, but the TD node judges that the destination node of this LTM message is for self node, so no longer transmit the LTM message.
Three, the TA node receives the response LTR message that returns of TB, TC, TD node from port one, analyzes the LTR message that receives, and obtains the syntople that TA node branch is clipped to TB, TC, TD node, and the place forms following list item at the TA node:
Table 3
| Destination node TD |
| MIP address (node TB) |
| Ingress port information (port one) (inlet when referring to message) through TB |
| MIP address (node TC) |
| Ingress port information (port one) (inlet when referring to message) through TC |
| MEP address (node TD) |
| Ingress port information (port one) (inlet when referring to message) through TD |
Ingress port information in the table is meant that LTM is at the inbound port of certain node or also be the outbound port of LTR from this node.
Four, the TA node is not received the LTR message of any corresponding coupling within a certain period of time, then can not form list item shown in the table 3.If the TA node is received the response LTR message of TB, TC, TD, then think can arrive TB, TC, TD node respectively, otherwise think that certain fault appears in link from the TA node, inconsistent with expected results.
Each node and port numbers are only as example in the present embodiment.
By LT method provided by the invention, can effectively follow the trail of the current actual conditions of link, obtain fast link syntople.Should be pointed out that the present invention also can have other multiple enforcement and extended mode.Under the situation that does not deviate from spirit and scope of the invention, those of ordinary skill in the art obviously can make various corresponding changes and expansion to the present invention, but these changes and expansion all should belong to the scope that claims of the present invention are protected.
For example, even if do not have MIP between two MEP, still can adopt the method for the invention to finish link tracing.
Claims (9)
1. a method of following the trail of based on realization service link on the Packet Transport Network that transmits multiprotocol label switching is characterized in that, may further comprise the steps:
(a) starting point Maintenance Entity end points is that MEP receives after startup link tracing that webmaster issues is the configuration order of LT, initiates the LT request message, and destination address is certain MEP address of webmaster appointment;
(b) described LT request message to node all return the LT response message to starting point MEP, comprise the port information of the node that arrives in the message;
(c) starting point MEP according to the LT response message to webmaster reporting links information.
2. the method for claim 1 is characterized in that,
In described step (a), described starting point MEP generates a LT and identifies this request message of unique identification when structure LT request message, and should sign existence one fixing ageing time, when ageing time then, this sign is deleted.
3. method as claimed in claim 1 or 2 is characterized in that,
In described step (b), receive that the node of described LT request message constructs described LT response message according to described LT request message, the destination address of described LT response message is that the MEP address, source of described LT request message is starting point MEP address, and this node port information added among the port TLV in the described LT response message, the LT sign is constant.
4. method as claimed in claim 3 is characterized in that,
In described step (c), after described starting point MEP received the LT response message, the LT sign of extracting in the LT response message was mated with the local LT sign that described starting point MEP safeguards, if the match is successful, then to network management system reporting links information.
5. method as claimed in claim 4 is characterized in that,
After described starting point MEP receives the LT response message, judge the legitimacy of this LT response message earlier,, then think legal LTR message if the destination address of current reception message conforms to the MEP address of present node.
6. the method for claim 1 is characterized in that,
Described link information comprises purpose MEP address, from starting point MEP to purpose MEP each MIP of process and the ingress port information of each MIP.
7. method as claimed in claim 3 is characterized in that,
In described step (a), it is the OAM label that described LT request message also has an operation management maintain, and the message jumping figure in this label is that TTL is set to a fixing discre value;
In described step (b), after certain node was received described LT request message, when structure LT response message, TTL was set to another fixedly discre value.
8. method as claimed in claim 7 is characterized in that,
In described step (b), when the node of receiving described LT request message is MIP for the Maintenance Entity intermediate point, described MIP judges the legitimacy of described LT request message, if the ttl value of current reception message is predefined fixedly discre value, thinks that then this LT request message is legal;
In described step (b), when the node of receiving described LT request message is that purpose Maintenance Entity end points is when being MEP, described purpose MEP judges the legitimacy of described LT request message, if the destination address of current reception message conforms to the MEP address of present node, think that then this LT request message is legal.
9. the method for claim 1 is characterized in that,
In described step (b), when the Maintenance Entity intermediate point is after MIP receives described LT request message, downstream is transmitted this LT request message of receiving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101642335A CN101136865A (en) | 2007-09-30 | 2007-09-30 | Method of implementing service link tracing based on T-MPLS packet transfer network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101642335A CN101136865A (en) | 2007-09-30 | 2007-09-30 | Method of implementing service link tracing based on T-MPLS packet transfer network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101136865A true CN101136865A (en) | 2008-03-05 |
Family
ID=39160703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101642335A Pending CN101136865A (en) | 2007-09-30 | 2007-09-30 | Method of implementing service link tracing based on T-MPLS packet transfer network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101136865A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854256A (en) * | 2010-05-28 | 2010-10-06 | 中兴通讯股份有限公司 | Method and system for implementing locking indication |
| CN101425928B (en) * | 2008-11-29 | 2011-06-22 | 中兴通讯股份有限公司 | Processing method and apparatus for maintaining entity group hierarchy |
| CN101599862B (en) * | 2009-06-30 | 2011-09-21 | 中兴通讯股份有限公司 | Method and device for allocating transport-multiprotocol label switching and ring network protecting maintenance entity groups |
| CN102598588A (en) * | 2009-10-15 | 2012-07-18 | 瑞典爱立信有限公司 | Network connection segment monitoring |
| CN102624598A (en) * | 2011-01-27 | 2012-08-01 | 中兴通讯股份有限公司 | Method, device and system for acquiring information on transmission path |
| CN102624599A (en) * | 2011-01-27 | 2012-08-01 | 中兴通讯股份有限公司 | Method, device and system for acquiring information on MPLS-TP transmission path |
| CN101753521B (en) * | 2008-11-28 | 2013-01-16 | 中兴通讯股份有限公司 | Method and device for processing maintenance entity assembly level |
| WO2016074371A1 (en) * | 2014-11-12 | 2016-05-19 | 中兴通讯股份有限公司 | Link tracking method and apparatus of ring network |
| CN106452963A (en) * | 2016-10-18 | 2017-02-22 | 北京东土科技股份有限公司 | Network path sensing method and system |
| CN106713074A (en) * | 2016-12-30 | 2017-05-24 | 贵州电网有限责任公司信息中心 | Data network quality piecewise detection method and system based on service content |
| CN110034971A (en) * | 2014-05-26 | 2019-07-19 | 华为技术有限公司 | Detect the method and device of business chain |
-
2007
- 2007-09-30 CN CNA2007101642335A patent/CN101136865A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753521B (en) * | 2008-11-28 | 2013-01-16 | 中兴通讯股份有限公司 | Method and device for processing maintenance entity assembly level |
| CN101425928B (en) * | 2008-11-29 | 2011-06-22 | 中兴通讯股份有限公司 | Processing method and apparatus for maintaining entity group hierarchy |
| CN101599862B (en) * | 2009-06-30 | 2011-09-21 | 中兴通讯股份有限公司 | Method and device for allocating transport-multiprotocol label switching and ring network protecting maintenance entity groups |
| CN102598588B (en) * | 2009-10-15 | 2014-12-10 | 瑞典爱立信有限公司 | Network connection segment monitoring |
| CN102598588A (en) * | 2009-10-15 | 2012-07-18 | 瑞典爱立信有限公司 | Network connection segment monitoring |
| WO2011147226A1 (en) * | 2010-05-28 | 2011-12-01 | 中兴通讯股份有限公司 | Method and system for realizing lock instruction |
| CN101854256A (en) * | 2010-05-28 | 2010-10-06 | 中兴通讯股份有限公司 | Method and system for implementing locking indication |
| CN102624598A (en) * | 2011-01-27 | 2012-08-01 | 中兴通讯股份有限公司 | Method, device and system for acquiring information on transmission path |
| CN102624599A (en) * | 2011-01-27 | 2012-08-01 | 中兴通讯股份有限公司 | Method, device and system for acquiring information on MPLS-TP transmission path |
| CN102624599B (en) * | 2011-01-27 | 2016-12-07 | 中兴通讯股份有限公司 | The transmission information getting method in path, the Apparatus and system of MPLS-TP |
| CN110034971A (en) * | 2014-05-26 | 2019-07-19 | 华为技术有限公司 | Detect the method and device of business chain |
| CN110034971B (en) * | 2014-05-26 | 2022-11-18 | 华为技术有限公司 | Method and device for detecting service chain |
| CN105656743A (en) * | 2014-11-12 | 2016-06-08 | 中兴通讯股份有限公司 | Ring network link tracking method and device |
| CN105656743B (en) * | 2014-11-12 | 2019-11-29 | 南京中兴新软件有限责任公司 | The link tracing method and device of loop network |
| WO2016074371A1 (en) * | 2014-11-12 | 2016-05-19 | 中兴通讯股份有限公司 | Link tracking method and apparatus of ring network |
| CN106452963A (en) * | 2016-10-18 | 2017-02-22 | 北京东土科技股份有限公司 | Network path sensing method and system |
| CN106713074A (en) * | 2016-12-30 | 2017-05-24 | 贵州电网有限责任公司信息中心 | Data network quality piecewise detection method and system based on service content |
| CN106713074B (en) * | 2016-12-30 | 2018-09-14 | 贵州电网有限责任公司信息中心 | Data network quality segmentation detection method based on business tine and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101136865A (en) | Method of implementing service link tracing based on T-MPLS packet transfer network | |
| JP4777363B2 (en) | Network system and data transfer device | |
| US10075371B2 (en) | Communication system, control apparatus, packet handling operation setting method, and program | |
| CN101536411B (en) | Ethernet OAM at intrmediate nodes in a PBT network | |
| JP4610621B2 (en) | Network system | |
| US7733791B2 (en) | Communication path monitoring system | |
| CN101047614B (en) | Flow transmission route set-up method and data transmission system in IPv6 network environment | |
| CN103516612B (en) | Distribution router generates method and the distribution router of route table items | |
| CN103023773B (en) | Method, device and system for forwarding message in multi-topology network | |
| US20130028112A1 (en) | Information distribution system and information management device | |
| EP2161880A1 (en) | A method for processing ether rig net message and an ether rig net protection system using the method | |
| CN103152205B (en) | Based on OAM processing method and the device of stream index | |
| CN103067278B (en) | A kind of method for transmission processing of Frame, equipment and system | |
| CN105790988B (en) | Method and device for realizing operation maintenance management function | |
| US7778256B2 (en) | Method and system for implementing virtual circuit status consistency | |
| JP5267065B2 (en) | Communication apparatus and network test method | |
| CN101425941A (en) | Loop network link convergence time and recovery time test system | |
| CN111327527B (en) | Flow forwarding method and system, SDN controller and computer readable storage medium | |
| JP5449548B2 (en) | Multicast processing method and apparatus | |
| US20100208623A1 (en) | Method and device of assigning ring identifier | |
| CN108601055B (en) | Method and system for deploying L3 VPN in L TE mobile backhaul network | |
| US20120224488A1 (en) | Method of connectivity monitoring by subscriber line terminating apparatus | |
| CN101350760B (en) | Method for forwarding data packet of virtual private network | |
| CN103001871A (en) | Label distribution method and device | |
| JP2007274456A (en) | Communication system, station side communication apparatus, and subscriber termination device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080305 |