CN101127646A - Method for monitoring sub-layer via EXP field identifier - Google Patents
Method for monitoring sub-layer via EXP field identifier Download PDFInfo
- Publication number
- CN101127646A CN101127646A CNA2007101498527A CN200710149852A CN101127646A CN 101127646 A CN101127646 A CN 101127646A CN A2007101498527 A CNA2007101498527 A CN A2007101498527A CN 200710149852 A CN200710149852 A CN 200710149852A CN 101127646 A CN101127646 A CN 101127646A
- Authority
- CN
- China
- Prior art keywords
- sublayer
- oam
- tcm
- exp
- supervision
- 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.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The utility model relates to a method, which uses an EXP field to identify the monitoring sublayer and comprises: step A: when start the multiprotocol label exchanging network to identify the monitoring sublayer of the exchanging channel, a monitoring sublayer entrance label exchanging router generates and sends the operation maintenance and management OAM label group forward; the protocol data unit of the OAM label group only comprises a label item, of which EXP field is used for identifying the monitoring sublayer; the step B: a monitoring sublayer exit label exchanging router identifies and processes the OAM label group; if the EXP in the received OAM protocol data unit belongs to the mapping value of the current monitoring sublayer, the net load of the OAM protocol data unit is processed and the continuous further forwarding of the OAM label group is stopped; otherwise, the received OAM label group is forwarded further directly. The utility model avoids the disadvantage of wasting the MPLS path bandwidth resource caused by adopting the label stacking manner and increase the network capability of transmitting the customer information.
Description
Technical field
The present invention relates to the method that a kind of EXP of use field identification monitors the sublayer, relate in particular in the packet switching network technical field, in multi protocol label exchange MPLS (the Multi-Protocol Label Switching) layer network, use EXP field identification subnet to connect the method that monitors sublayer and Tandem Connection Monitor sublayer.
Background technology
Multi protocol label exchange MPLS (Multi-Protocol Label Switching) technology is a kind of integrated data transmission technology that combines two layers of exchange and three layers of route, various protocols that can the network enabled layer, multiple link-layer technologies that can also the compatible second layer.Internet Protocol IP (Internet Protocol) router of employing MPLS technology and asynchronous transfer mode ATM (Asynchronous TransferMode), frame relay FR (Frame Relay) switch are referred to as LSR LSR (LabelSwitch Router).In the MPLS data transmission network of forming by LSR, because customer information is transmitted by known connection, simplified the complexity of network layer relatively, reduced the cost of network upgrade.Therefore, in the world, the MPLS technology has obtained large-scale application at core network.
In conjunction with Pseudo Wire Emulation Edge-to-Edge PWE3 (Pseudo Wire Emulation Edge-to-Edge) technology and MPLS tunneling technique, the MPLS switching network can be supported link layer and the more transmission of low level customer information, comprises Ethernet ETH (Ethernet), asynchronous transfer mode ATM, frame relay FR, structuring and non-structured time division multiplexing and multiplexer TDM (Time Division Multiplex andMultiplexer) etc.This has enlarged MPLS The Application of Technology scope further, makes the MPLS network not only can be applied in core network environment, also can be applied in and converge and access network environment.
For ease of improving survival ability and the maintainability that the MPLS network connects, the ITU-T of ITU Telecommunication Standardization Sector (International Telecommunication Union-TelecommunicationStandardization Sector) tissue defines and has formulated label switched path LSP (Label Switched Path) and operated end to end for the MPLS network, maintenance and management OAM (Operation, Administration and Maintenance) function and mechanism, be used to realize the fault management and the performance monitoring in MPLS layer network path, and set up different alarm statuses according to testing result.When MPLS network support during based on the linear protection function in path, the LSP fault condition set up of OAM(Operation Administration Maintenance) end to end can be used as the foundation that trail protection is switched.
ITU-T has also defined Tandem Connection Monitor TCM (Tandem ConnectionMonitoring) sublayer function for the MPLS network, but does not formulate corresponding realization mechanism at present.Described sublayer is meant additional processing capacity and the reference point of transmitting of a cover of including in a layer network.It forms by decomposing transmission processing capacity or reference point.Described being connected in series is meant " the link connection " and/or " sub-network connection " of any one group of adjacency.Described sub-network is meant a kind of topological member that the route that is used to realize specific characteristic information is arranged.Sub-network is present among the single layer network, and it is determined by the one group of port that can be used to transfer characteristic information.Association between each port on the subnet boundaries can be made of the management processing of layer network and disconnect, thereby changes its connectivity.After sub-network connect to be set up, the combination of the input and output that are connected with sub-network by these ports had also just generated reference point.Generally speaking, but subnet road piecemeal is the littler sub-network by link interconnect; Matrix is a kind of special circumstances of sub-network, and it can not piecemeal.Described sub-network connects, and is meant that sub-network that a kind of leap is formed by the association of sub-network borderline each " port " transmits " the transmission entity " of information.
The sub-network connection can be passed through sub-network and be transmitted information pellucidly.It is delimitated by the tie point on the subnet boundaries, represents the association between these tie points.After sub-network connect to be set up, the combination of the input and output that are connected with sub-network by these ports had also just generated reference point.Generally speaking, the sub-network connection is made of sub-network connection and link-attached cascade.It is the special circumstances that sub-network connects that matrix connects, and it is connected and composed by single (inseparable) sub-network.
The TCM sublayer is used for the fault management and the performance monitoring of partial L SP or the connection of MPLS subnet.A LSP of MPLS network can dispose a plurality of TCM sublayer, but does not allow to occur between the TCM sublayer overlapping.Generally, the TCM sublayer be applied between the same management domain of the MPLS layer network border LSR or adjacent management domain in abutting connection with between the LSR of border.
The MPLS network is enabled after the function of TCM sublayer, can connect based on subnet to set up alarm conditions.If the defencive function that the MPLS network support connects based on the MPLS subnet, the foundation that the fault condition that the TCM sublayer produces can be switched as SNCP.Be not difficult to find out that enable after the function of TCM sublayer, the survival ability and the maintainability of MPLS network are further strengthened.
The MPLS network does not limit the labeled slots degree of depth of packet header, and therefore, being chosen as the TCM sublayer usually increases new MPLS shim realization corresponding function.For this implementation, when there is nested TCM sublayer in LSP, the end-to-end operation of Tandem Connection Monitor, maintenance and management protocol Data Unit TCM OAM PDU (Protocol Data Unit) will comprise the multilayer tag entry.Crossing dark labeled slots will increase the path cost of MPLS layer network, reduce the ability that network transmits customer information.
Summary of the invention
The technical problem to be solved in the present invention provides the method that a kind of EXP of use field identification monitors the sublayer.
In order to address the above problem, the invention provides the method that a kind of EXP of use field identification monitors the sublayer, comprise the steps:
Steps A: when enabling the supervision sublayer function of mpls network label switched path, described supervision sublayer threshold marker switch router generates also transmit operation maintenance and management OAM mark packets forward, the protocol Data Unit of described OAM mark packets only comprises a tag entry, and the EXP field of described tag entry is used to identify described supervision sublayer;
Step B: exit marking switch router identification in described supervision sublayer is also handled described OAM mark packets, if the EXP that the OAM Protocol Data Unit that receives comprises belongs to the mapping value of current supervision sublayer, handle this OAM Protocol Data Unit payload, and stop this OAM mark packets and continue to transmit forward, otherwise, directly transmit the OAM mark packets that receives forward.
Further, the mark value lable of described tag entry is 14, the S value is 1, life span TTL (Time To Live, life span) value is 1.
Further, belong to a plurality of supervision sublayer of same label switched path, in inside, every supervision sublayer, it is unique that the EXP that OAM Protocol Data Unit comprises keeps.
Further, when having nest relation between the described supervision sublayer, exist between the supervision sublayer of nest relation, it is unique that the EXP that OAM Protocol Data Unit comprises also keeps.
Further, also comprise before the steps A: label switched path passes one or more management domains of mpls network, be chosen between the threshold marker switch router and exit marking switch router that described label switched path passes, between two boundary marker routers of each management domain and/or adjacent management domain in abutting connection with configuration monitoring sublayer function between the label router.
Further, in the outer mark clauses and subclauses of described OAM mark packets, LSP-S is 0, and indicating the payload of described OAM mark packets carrying is not customer information.
Further, the EXP span that comprises of described OAM Protocol Data Unit is 0-7.
Further, when label switched path was enabled end-to-end OAM simultaneously and monitored the sublayer function, the EXP span that described OAM Protocol Data Unit comprises was 1-7.
Further, described label switched path is unidirectional or two-way.
Further, for same label switched path, maximum 8 layers of supervision of existence sublayers that allow.
Further, described supervision sublayer is that subnet connects and monitors sublayer or Tandem Connection Monitor sublayer.
A kind of method of using the EXP field identification to monitor the sublayer provided by the invention, guaranteeing that these two kinds of functions realize the simple relatively while, avoid adopting the drawback of mark stack manner waste MPLS path bandwidth resource, increased the ability of network transmission customer information.
Description of drawings
Fig. 1 is a TCM OAM mark packets structure chart on the link of the present invention;
Fig. 2 is that the present invention does not have the MPLS network configuration of TCM sublayer when nested;
Fig. 3 is that the present invention contains the MPLS network structure of TCM sublayer when nested.
Embodiment
Core concept of the present invention is, selects to adopt the EXP field identification of OAM PDU mark to monitor the sublayer, and described supervision sublayer can be that subnet connects and monitors sublayer or Tandem Connection Monitor sublayer.
Be example with the Tandem Connection Monitor sublayer below, describe method of the present invention in detail.When enabling the TCM function of MPLS network LSP, all TCM sublayers that belong to same LSP, no matter whether there is nest relation, the TCM OAM PDU that the TCM sublayer monitors always has the identical labeled slots degree of depth, and only comprises a tag entry, and mark value is 14, the EXP field is used to identify the TCM sublayer or subnet connects the supervision sublayer, the S value is 1, and TTL (Time To Live, life span) value is 1.
The a plurality of TCM sublayer that belongs to same LSP, if there is not nest relation each other, the EXP of each TCM sublayer TCM OAM PDU mark is uncorrelated mutually, and it is unique to be only required in the inner maintenance in every TCM sublayer, and the EXP of different TCM sublayer TCM OAM PDU mark can be identical or different; For the TCM sublayer that has nest relation, except the EXP of the inner maintenance in each TCM sublayer TCM OAMPDU mark is unique, exist between each TCM sublayer of nest relation, it is unique that the EXP of TCM OAMPDU mark also must keep.Because the EXP field of MPLS mark comprises 3 bits, for same LSP, the maximum 8 layers of TCM sublayer of existence that allow.
The present invention uses the method for EXP field identification TCM sublayer, comprises the steps:
Step 1: LSP passes one or more management domains of MPLS layer network, is chosen between the inlet LSR and egress LSR that described LSP passes, between two border LSR of each management domain, adjacent management domain is in abutting connection with configuration TCM sublayer function between the LSR.
Step 2: TCM sublayer inlet LSR generates and sends forward TCM OAM mark packets.
On the link of the present invention TCM OAM mark packets as shown in Figure 1, TCM OAM mark packets form is: the tag entry of described LSP on TCM sublayer inlet LSR, TCM OAM PDU.The outer mark clauses and subclauses of being made up of LSP-Label, LSP-EXP, LSP-S, LSP-TTL are MPLS layer network routing marks.If the S value of described LSP tag entry is 1, for TCM OAM mark packets, it must be revised as 0, the payload of indication TCM OAM mark packets carrying is not a customer information.The assignment of other fields is handled the mark packets that is equal to LSP carrying client information.
The internal layer mark of being made up of TCM-Label, TCM-EXP, TCM-S, TCM-TTL is the tag entry of TCMOAM PDU.TCM OAM PDU form is: TCM-Label=14, and just mark value=14 indicate TCM OAM PDU to comprise OAM information; TCM-EXP=specific T CM sublayer mapping value belongs to all TCM OAM PDU of identical TCM sublayer, and TCM-EXP must be unique.TCM-S=1, TCM-TTL=1, TCM OAM PDU is a payload.
When described LSP comprised a plurality of TCM sublayer, if there is not nest relation between the TCM sublayer, the EXP of TCM OAM PDU only need innerly in every TCM sublayer keep unique, and the EXP of different TCM sublayer TCM OAM PDU can be identical or different.As shown in Figure 2, unidirectional LSP-11 passes two management domains, has disposed three TCM sublayers altogether.TCM-A monitors that the subnet of territory A connects, and TCM-AB monitors that adjacent domains A and B connect in abutting connection with the subnet between the LSR, and TCM-B monitors that the subnet of territory B connects.For TCM-A, TCM OAM mark packets generates and sends at LSR-11, in LSR-12 termination and processing.For TCM-AB, TCM OAM mark packets generates and sends at LSR-12, in LSR-13 termination and processing.For TCM-B, TCM OAM mark packets generates and sends at LSR-13, in LSR-14 termination and processing.Because do not have inclusion relation between three TCM sublayers, the TCM OAM mark packets of any TCM sublayer can not passed other TCM sublayers, therefore, the TCM-EXP of different TCM sublayer can be identical, also can be different.
Between the TCM sublayer, there is nest relation, except the EXP that requires TCM OAM PDU every TCM sublayer inner keep unique, exist the EXP of the TCM sublayer TCM OAM PDU of nest relation also must keep unique, just exist the EXP of TCM OAM PDU of the sublayer of nest relation must be inequality.
As shown in Figure 3, unidirectional LSP-21 passes territory C, D, E, has disposed three TCM sublayers.TCM-C monitors that the subnet of territory C connects, and TCM-D monitors that the subnet of territory D connects, and TCM-E monitors that the subnet of territory E connects.
For TCM-C, TCM OAM mark packets generates and sends at LSR-21, transmits through LSR-22, LSR-23, LSR-24, and arrival LSR-25 terminates afterwards and handles.For TCM-D, the TCMOAM mark packets generates and sends at LSR-21, arrives LSR-22 termination and processing afterwards.For TCM-E, TCM OAM mark packets generates and sends at LSR-23, transmits through LSR-24, and arrival LSR-25 terminates afterwards and handles.TCM-C contains TCM-D and TCM-E fully, and its TCM-EXP must be different from the TCM-EXP of TCM-D and TCM-E, otherwise which sublayer is the TCM OAM mark packets that LSR-22 and LSR-25 can not normally distinguish current termination and processing belong to.TCM-D and TCM-E are all the nested sublayer of TCM-C, because the TCM OAMPDU of TCM-D can not pass TCM-E, the TCM OAM PDU of TCM-E can not pass TCM-D yet, and therefore, the TCM EXP of TCM-D and TCM-E can be identical, also can be different.
After enabling TCM sublayer function, do not influence the normal forwarding and the processing of the end-to-end OAM mark packets of described LSP, customer information mark packets.If LSP enables end-to-end OAM and TCM sublayer function simultaneously, the EXP span of TCM OAM PDU is 1-7; Otherwise the EXP span of TCM OAM PDU is 0-7.
Step 3: egress LSR identification in TCM sublayer is also handled TCM OAM mark packets.If the EXP that the TCM OAM PDU that receives comprises belongs to the mapping value of current TCM sublayer, handle this TCMOAM PDU payload, and stop TCM OAM mark packets continuation forwarding forward.Otherwise, directly transmit the TCM OAM mark packets that receives forward.
If LSP is two-way, other direction still can be realized TCM sublayer function according to above-mentioned steps.
The present invention uses the EXP field identification TCM sublayer of TCM OAM PDU.When LSP comprises nested TCM sublayer, do not need to add the multilayer tag entry for the TCM OAM PDU payload of different TCM sublayer.Because it is identical to belong to all TCM OAM mark packets labeled slots degree of depth of same LSP, when minimizing takies effective MPLS network bandwidth resources, also simplified the complexity that function realizes relatively.Mapping method between the EXP of any TCM sublayer and TCM OAM PDU, the EXP of every use TCM OAM PDU judge whether the TCM OAM PDU that receives belongs to the method for current TCM sublayer all without prejudice to principle of the present invention.
Should be understood that; concerning the those of ordinary skill in field, place of the present invention; can be equal to accordingly according to technical scheme of the present invention and design thereof and change or replace, and all these changes or replacement, all should belong to the protection range of claims of the present invention.
Claims (11)
1. a method of using the EXP field identification to monitor the sublayer is characterized in that comprising the steps:
Steps A: when enabling the supervision sublayer function of mpls network label switched path, described supervision sublayer threshold marker switch router generates also transmit operation maintenance and management OAM mark packets forward, the protocol Data Unit of described OAM mark packets only comprises a tag entry, and the EXP field of described tag entry is used to identify described supervision sublayer;
Step B: exit marking switch router identification in described supervision sublayer is also handled described OAM mark packets, if the EXP that the OAM Protocol Data Unit that receives comprises belongs to the mapping value of current supervision sublayer, handle this OAM Protocol Data Unit payload, and stop this OAM mark packets and continue to transmit forward, otherwise, directly transmit the OAM mark packets that receives forward.
2. the method for claim 1 is characterized in that, the mark value lable of described tag entry is 14, the S value is 1, the life span ttl value is 1.
3. method as claimed in claim 2 is characterized in that, belongs to a plurality of supervision sublayer of same label switched path, and in inside, every supervision sublayer, it is unique that the EXP that OAM Protocol Data Unit comprises keeps.
4. method as claimed in claim 3 is characterized in that, when having nest relation between the described supervision sublayer, exists between the supervision sublayer of nest relation, and it is unique that the EXP that OAM Protocol Data Unit comprises also keeps.
5. as the arbitrary described method of claim 1 to 4, it is characterized in that, also comprise before the steps A: label switched path passes one or more management domains of mpls network, be chosen between the threshold marker switch router and exit marking switch router that described label switched path passes, between two boundary marker routers of each management domain and/or adjacent management domain in abutting connection with configuration monitoring sublayer function between the label router.
6. method as claimed in claim 5 is characterized in that, in the outer mark clauses and subclauses of described OAM mark packets, LSP-S is 0, and indicating the payload of described OAM mark packets carrying is not customer information.
7. method as claimed in claim 6 is characterized in that, the EXP span that described OAM Protocol Data Unit comprises is 0-7.
8. method as claimed in claim 7 is characterized in that, when label switched path was enabled end-to-end OAM simultaneously and monitored the sublayer function, the EXP span that described OAM Protocol Data Unit comprises was 1-7.
9. as the arbitrary described method of claim 1 to 4, it is characterized in that described label switched path is unidirectional or two-way.
10. the method for claim 1 is characterized in that, for same label switched path, and maximum 8 layers of supervision of existence sublayers that allow.
11. the method for claim 1 is characterized in that, described supervision sublayer is that subnet connects supervision sublayer or Tandem Connection Monitor sublayer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101498527A CN100531075C (en) | 2007-09-17 | 2007-09-17 | Method for monitoring sub-layer via EXP field identifier |
| PCT/CN2007/003839 WO2009036637A1 (en) | 2007-09-17 | 2007-12-27 | Method for identifying monitoring sub-layer with use of exp field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101498527A CN100531075C (en) | 2007-09-17 | 2007-09-17 | Method for monitoring sub-layer via EXP field identifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101127646A true CN101127646A (en) | 2008-02-20 |
| CN100531075C CN100531075C (en) | 2009-08-19 |
Family
ID=39095578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101498527A Expired - Fee Related CN100531075C (en) | 2007-09-17 | 2007-09-17 | Method for monitoring sub-layer via EXP field identifier |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100531075C (en) |
| WO (1) | WO2009036637A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142979A (en) * | 2010-10-27 | 2011-08-03 | 华为数字技术有限公司 | Method and device for processing Ethernet operations, administration and maintenance protocol data unit |
| CN102577260A (en) * | 2009-07-24 | 2012-07-11 | 瑞典爱立信有限公司 | Methods and arrangement in a mpls-tp telecommunications network for oam functions |
| CN102598601A (en) * | 2009-11-05 | 2012-07-18 | 日本电气株式会社 | Node, monitoring and administration method used thereupon, and transfer system, input circuit, and output circuit using same |
| CN105812198A (en) * | 2014-12-26 | 2016-07-27 | 中兴通讯股份有限公司 | Method and device for bridged network end-to-end monitoring |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6925081B2 (en) * | 2003-07-11 | 2005-08-02 | Cisco Technology, Inc. | MPLS device enabling service providers to control service levels in forwarding of multi-labeled packets |
| ITMI20051570A1 (en) * | 2005-08-12 | 2007-02-13 | Alcatel Italia | MONITORING METHOD OF A TANDEM CONNECTION IN AN MPLS-TYPE TELECOMMUNICATIONS NETWORK |
| CN100365998C (en) * | 2005-09-15 | 2008-01-30 | 华为技术有限公司 | System and method for implementing OAM function of ethernet and multi-protocol tag exchange network |
| US7782864B2 (en) * | 2005-12-06 | 2010-08-24 | Electronics And Telecommunications Research Institute | Apparatus and method for providing QoS for MPLS traffic |
-
2007
- 2007-09-17 CN CNB2007101498527A patent/CN100531075C/en not_active Expired - Fee Related
- 2007-12-27 WO PCT/CN2007/003839 patent/WO2009036637A1/en active Application Filing
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102577260A (en) * | 2009-07-24 | 2012-07-11 | 瑞典爱立信有限公司 | Methods and arrangement in a mpls-tp telecommunications network for oam functions |
| CN102577260B (en) * | 2009-07-24 | 2015-07-22 | 瑞典爱立信有限公司 | Methods and arrangement in a mpls-tp telecommunications network for oam functions |
| CN102598601A (en) * | 2009-11-05 | 2012-07-18 | 日本电气株式会社 | Node, monitoring and administration method used thereupon, and transfer system, input circuit, and output circuit using same |
| CN102598601B (en) * | 2009-11-05 | 2016-08-10 | 日本电气株式会社 | Node, for the monitoring management method of node and use the transmission system of node, input circuit and output circuit |
| CN102142979A (en) * | 2010-10-27 | 2011-08-03 | 华为数字技术有限公司 | Method and device for processing Ethernet operations, administration and maintenance protocol data unit |
| CN105812198A (en) * | 2014-12-26 | 2016-07-27 | 中兴通讯股份有限公司 | Method and device for bridged network end-to-end monitoring |
| CN105812198B (en) * | 2014-12-26 | 2020-02-14 | 中兴通讯股份有限公司 | Method and device for monitoring end-to-end of bridge network |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009036637A1 (en) | 2009-03-26 |
| CN100531075C (en) | 2009-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1720024B1 (en) | A method for realizing the pseudo wire emulation edge-to-edge protocol | |
| EP1777897B1 (en) | A method for implementing management and protection by dividing domain in the label switching network | |
| US8854975B2 (en) | Scaling OAM for point-to-point trunking | |
| US8305884B2 (en) | Systems and methods for a self-healing carrier ethernet topology | |
| KR101342944B1 (en) | Gmpls control of ethernet | |
| EP2033377B1 (en) | Forced medium access control (MAC) learning in bridged ethernet networks | |
| EP1978681B1 (en) | Methods and devices for judging pw connection state and notifying ac connection state | |
| US8553534B2 (en) | Protecting an ethernet network having a ring architecture | |
| US20010049739A1 (en) | Apparatus and method for interworking between MPLS network and non-MPLS network | |
| US7944924B2 (en) | Handling of received implicit null packets | |
| MX2007008112A (en) | Connection-oriented communications scheme for connection-less communications traffic. | |
| CN101364926A (en) | Method and apparatus for network protection | |
| US20120163384A1 (en) | Packet Transport Node | |
| EP1478129A2 (en) | Using network transport tunnels to provide service-based data transport | |
| KR20100080536A (en) | Carrier network connection device and carrier network | |
| WO2009082825A1 (en) | Interworking an ethernet ring network and an ethernet network with traffic engineered trunks | |
| KR20120036903A (en) | Inter-node link aggregation system and method | |
| EP2436152A1 (en) | Failure localisation in a mpls-tp network | |
| CN1514585A (en) | Method used for detecting conncetion failure, system and network entity | |
| CN100531075C (en) | Method for monitoring sub-layer via EXP field identifier | |
| CN102546352B (en) | A kind of method and system realizing point-to-multipoint label switch paths protection | |
| EP2627037A1 (en) | Network configuration method, ring network system, and node | |
| CN102387070A (en) | Data protection method for T-MPLS (transport multi-protocol switching) shared protection ring before failure recovery | |
| WO2005050933A1 (en) | Point-to-point route monitoring in a packet-based core network | |
| Umayabashi et al. | Improving ethernet reliability and stability using global open ethernet technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151218 Address after: Yuhuatai District of Nanjing City, Jiangsu province 210012 Bauhinia Road No. 68 Patentee after: Nanjing Zhongxing New Software Co., Ltd. Address before: 518057 Nanshan District high tech Industrial Park, Guangdong, South Road, science and technology, ZTE building, legal department Patentee before: ZTE Corporation |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20160917 |