WO2011022917A1 - 无虚拟通道的子环控制信道阻塞协议报文的方法和系统 - Google Patents
无虚拟通道的子环控制信道阻塞协议报文的方法和系统 Download PDFInfo
- Publication number
- WO2011022917A1 WO2011022917A1 PCT/CN2009/076012 CN2009076012W WO2011022917A1 WO 2011022917 A1 WO2011022917 A1 WO 2011022917A1 CN 2009076012 W CN2009076012 W CN 2009076012W WO 2011022917 A1 WO2011022917 A1 WO 2011022917A1
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- WIPO (PCT)
- Prior art keywords
- node
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- fault
- port
- ring
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/437—Ring fault isolation or reconfiguration
-
- 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
-
- 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
- H04L45/02—Topology update or discovery
-
- 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
- H04L45/302—Route determination based on requested QoS
- H04L45/304—Route determination for signalling traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
-
- 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
- H04L41/34—Signalling channels for network management communication
- H04L41/342—Signalling channels for network management communication between virtual entities, e.g. orchestrators, SDN or NFV entities
Definitions
- the present invention relates to the field of data communications, and in particular, to a method and system for a sub-ring control channel blocking protocol without a virtual channel. Background technique
- Ethernet networks are widely used to improve network reliability. And in the ring protection method, fast protection switching is usually required to reach 50ms or less.
- technologies for fast protection switching include RFC3619 of the Internet Engineering Task Force (IETF) and G.8032 of the International Telecommunication Union (ITU-T).
- subrings For the definition of subrings, standards that are being developed internationally, such as ITU G.8032, consider subrings to be Ethernet rings that are connected to other rings or networks through interconnected nodes.
- the interconnected nodes belong to two or more simultaneously.
- the public node of the Ethernet ring The public node of the Ethernet ring.
- nodes A to G on the subring Sub-ringl are nodes with Ethernet switching function, and Sub-ringl accesses network X through the interconnection point.
- User M and node B are connected, and user N and node D are connected.
- Communication between network M and network N There are two physical paths between network M and network N, namely: user N— ⁇ node D— ⁇ node C— ⁇ node B— ⁇ network M, user N— ⁇ node D— ⁇ node E— ⁇ node F— ⁇ Network X— ⁇ Node A— ⁇ Node G— ⁇ Node B— ⁇ User M.
- the ring protection link and the control node are generally defined. That is, when the Ethernet ring network is fault-free, the link on the sub-ring blocks the data packet to prevent the data loop from forming.
- the protection link can be operated by the operation of the ring protection link. Switch between path and protection path.
- a node that has a ring protection link referred to herein as a control node or as a master node.
- the ring network contains nodes G, A, B, C, D, E, and F, and the links included are ⁇ G, A>, ⁇ A, B>, ⁇ B, C>, ⁇ C, D>, ⁇ D, E> and ⁇ E, F> links.
- Node A is the control node, and its w port direct link ⁇ A,:8> is the ring protection link.
- control node blocks the data packet forwarding function of the port connected to the ring protection link. No loop occurs in the network to prevent the broadcast storm caused by the network loop. As shown in Figure 2a, control node A blocks the protection data forwarding function of the e port.
- the communication paths of users M and N are Pathl: user M - ⁇ node B - ⁇ node C - ⁇ node D - ⁇ user N.
- control node When the link is faulty, the control node releases the data packet forwarding function of the port connected to the ring protection link to ensure service connectivity. As shown in Figure 2b, the ⁇ B, 0 link on the ring is faulty. Control node A releases the data packet forwarding function of port w.
- the new communication path of user M and N is Path2: User M— ⁇ Node B— ⁇ Node A— ⁇ Node G— ⁇ Network X— ⁇ Node F— ⁇ Node E— ⁇ Node D— ⁇ User N.
- the node When a link switchover occurs on a sub-ring, the node needs to refresh the address forwarding table to prevent data packets from continuing to be forwarded along the wrong path, that is, the path before the link switchover.
- the communication paths of users M and N are Pathl: User M - ⁇ Node B - ⁇ Node C - ⁇ Node D - ⁇ User N.
- the ⁇ B, 0 link on the ring is faulty, if the node on the ring does not perform address refresh, the data packets of the user M and N are still transmitted along the original path, and the packet sent by the user M is at the node B. The packet sent by user N is discarded at node C. Therefore, in order to ensure that the ring network changes after the topology, the nodes on the ring network should refresh the address forwarding table.
- the address refreshing scheme of the ITU-T G.8032 is:
- the node extracts the ⁇ Node_ID, BPR> information.
- the port compares the ⁇ Node_ID, BPR> information in the packet with the ⁇ Node_ID, BPR> information originally saved on the port. If they are inconsistent, the port will save the original save ⁇ Node_ID, BPR > and put the new ⁇ 1 ⁇ 0(16_10, BPR> is saved, and the node refreshes the address forwarding table.
- NODE_ID is the identification number of the node, and BPR is used to indicate which port of the protocol packet is blocked.
- the address refresh message of the sub-ring is to be propagated on the sub-ring control channel.
- the control channel of the sub-ring of the ITU-T G.8032 has two configurations, one is a configuration without a virtual channel, that is, the control channel of the sub-ring is only configured in the sub-ring, as shown in Figure 3a. Show.
- the control channel configuration of another seed ring includes portions within the sub-ring and virtual channels.
- the virtual channel is configured on other networks or other rings between the interconnected nodes.
- the virtual channel provides the control channel of the sub-ring of the transmission channel for the sub-ring protocol message, as shown in Figure 3b.
- G.8032 stipulates that the sub-ring protocol packet is blocked. "In the case of no virtual channel, the sub-ring control channel terminates at the interconnect node, and the node on the ring blocks the protocol packet of the sub-ring control channel. transmission".
- the e-port of node C initiates a forced handover (FS), node C refreshes the address forwarding table, and then periodically sends the FS protocol along the two ports on the sub-ring. After receiving the protocol packet for the first time, the other nodes on the sub-ring refresh their respective address forwarding tables.
- the control node A also needs to enable the forwarding function of the data packets of the w port.
- a single-pass fault occurs in the link ⁇ E, D>, that is, the direction of the E-D is unblocked, and the direction of the D-E is unreachable.
- the node E blocks the e-port and periodically sends SF packets. .
- nodes A, B, and G Since the non-faulty blocking point on the subring only blocks the data and does not block the protocol 4, the nodes A, B, and G will alternately receive the FS and SF protocols sent by the node C and the node E. Yan Wen.
- the ⁇ Node_ID, BPR> saved by nodes A, B, and G will be updated as the nodes FS and SF protocol messages alternate. In other words, nodes A, B, and G will be in a continuous refresh state.
- the performance of the subring is greatly impaired Bad, always in the midst of a broadcast storm. Summary of the invention
- the present invention proposes a method for the sub-ring control channel blocking protocol without the virtual channel.
- the method includes: blocking the forwarding of related packets when a forced handover is initiated or a fault is detected.
- the forwarding of the related packet is blocked, and the method includes: determining whether the port of the node located on the subring starts forced switching; when the forced switching is started, the node is blocked. Packet forwarding: When the forced switchover is not started, it is determined whether the port detects that the adjacent link is faulty. When the fault occurs, the node blocks the forwarding of the related packets.
- the related packets are protocol packets and data packets.
- the fault is a single-pass fault.
- the method further includes: refreshing the address forwarding table; and periodically sending the signal failure packet outward.
- the present invention also provides a system for a sub-ring control channel blocking protocol packet without a virtual channel, and the system includes: a blocking module, configured to block forwarding of related packets when a forced handover is initiated or a fault is detected.
- the system further includes: a forced switching determining module and a fault determining module; wherein, the forced switching determining module is configured to determine whether a port of the node located on the subring starts forced switching;
- the fault judging module is configured to determine whether the port detects that the adjacent link is faulty.
- the related packets are protocol packets and data packets.
- the fault is a single-pass fault.
- Figure la is a schematic structural view of a sub-ring in the prior art
- Figure 2a is a schematic diagram of data forwarding in the case of a subring without failure
- Figure 2b is a schematic diagram of data flow protection switching in the case of a sub-ring failure
- Figures 3a and 3b are schematic diagrams of two control channels of a subring
- FIGS. 4a and 4b are schematic views of problems occurring in the prior art
- Figure 5a is a schematic diagram of a specific process of the method of the present invention.
- 6a and 6b are schematic views of Example 1 of the present invention.
- Figure 7a is a schematic illustration of Example 2 of the present invention. detailed description
- the core content of the present invention is: When the sub-ring is configured with no control channel of the virtual channel, if the node initiates FS on the port on the sub-ring or detects that the adjacent link fails, the port blocking protocol is blocked. Forward, otherwise the port does not block the forwarding of any protocol.
- Step 501 The system configures a sub-ring control channel without a virtual channel for the sub-ring.
- Step 502 The sub-ring node checks the operation status of the port.
- Step 503 Determine whether the port of the sub-ring node starts FS. If the FS is started, go to step 504, otherwise go to step 505.
- Step 504 The node blocks the protocol packet of the port and the forwarding function of the data packet.
- Step 505 Determine whether the port detects that a fault has occurred in the adjacent link. If a fault occurs, proceed to step 506.
- Step 506 The node blocks the protocol packet of the port and the forwarding function of the data packet. Specifically, we describe a specific implementation method according to the present invention by two, but not limited to, two examples.
- Example 1 is: An example of forced switching and single-pass failure on the subring.
- the ring network includes nodes A, B, C, D, E, F, and G, and the links included are ⁇ G, A>, ⁇ A, B>, ⁇ B, C>, ⁇ C, D>, ⁇ D, E> and ⁇ E, F> links.
- Node A is the control node, and its direct link to the w port ⁇ A, B> is the ring protection link.
- the w port of node A blocks the forwarding of data packets under normal conditions.
- the e port of the node C starts the FS, and the node C blocks the protocol packet and the data packet forwarding function of the e port, refreshes the address forwarding table, and then periodically sends the FS along the two ports on the subring. Protocol message.
- other nodes on the sub-ring refresh their respective address forwarding tables, and control node A also needs to open the forwarding function of the data packets of the w port.
- a single-pass fault occurs in the link ⁇ E, D>, ie: the direction of E-D is unblocked, the direction of D ⁇ E is unreachable; the protocol of node E blocking e-ports ⁇ and data 4
- the forwarding function of the text is to refresh the address forwarding table and periodically send SF packets. After receiving the SF packets sent by the node E for the first time, the nodes C, D, and F refresh their respective address forwarding tables. As the e port of the node C blocks the protocol packets and data packets, the nodes A, B, and G cannot receive the SF packets sent by the E. Therefore, nodes A, B, and G do not appear to be continuously refreshed. Among them, the e port at this time starts FS.
- Example 2 is: An instance of multiple single-pass faults on a subring.
- the link ⁇ : B, C> first occurs a single-pass fault, that is, the direction of C-B is unblocked, and the direction of B ⁇ C is unreachable.
- the protocol for blocking the e-port is blocked.
- Message And the forwarding function of the data packet refreshing the address forwarding table, and periodically sending the SF2 packet outward.
- the other nodes on the sub-ring refresh the respective address forwarding table.
- Control node A also needs to open the forwarding function of the data packet of the w port.
- the single-pass fault occurs on the link ⁇ E, D>, that is, the direction of the E-D is unblocked, and the direction of the D ⁇ E is unreachable; the node E blocks the forwarding of the protocol packets and data packets of the e-port.
- the address forwarding table is refreshed, and the SF ⁇ message is periodically sent out.
- the nodes C, D, and F refresh their respective address forwarding tables.
- the nodes A, B, and G cannot receive the SF packets sent by the E. Therefore, nodes A, B, and G do not appear to be continuously refreshed.
- the adjacent link of the e port is faulty.
- sub-rings mentioned above are represented by Sub-Ring; the interconnection nodes are represented by Interconnection Node; and the virtual channels are represented by Virtual Channel.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020127004654A KR101302815B1 (ko) | 2009-08-28 | 2009-12-24 | 가상 채널이 없는 서브 링 제어 채널이 프로토콜 메시지를 블로킹 하는 방법 및 시스템 |
JP2012525849A JP5465784B2 (ja) | 2009-08-28 | 2009-12-24 | 仮想チャネルのないサブリング制御チャンネルがプロトコルメッセージをブロックする方法及びシステム |
US13/392,948 US8649261B2 (en) | 2009-08-28 | 2009-12-24 | Method and system for blocking protocol messages at a sub-ring control channel without virtual channel |
EP09848649.1A EP2472796A4 (en) | 2009-08-28 | 2009-12-24 | Method and system for blocking protocol messages at a sub-ring control channel without virtual channel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN200910167599.7 | 2009-08-28 | ||
CN200910167599.7A CN101997748B (zh) | 2009-08-28 | 2009-08-28 | 无虚拟通道的子环控制信道阻塞协议报文的方法和系统 |
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WO2011022917A1 true WO2011022917A1 (zh) | 2011-03-03 |
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PCT/CN2009/076012 WO2011022917A1 (zh) | 2009-08-28 | 2009-12-24 | 无虚拟通道的子环控制信道阻塞协议报文的方法和系统 |
Country Status (6)
Country | Link |
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US (1) | US8649261B2 (zh) |
EP (1) | EP2472796A4 (zh) |
JP (1) | JP5465784B2 (zh) |
KR (1) | KR101302815B1 (zh) |
CN (1) | CN101997748B (zh) |
WO (1) | WO2011022917A1 (zh) |
Families Citing this family (5)
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US9264254B2 (en) * | 2012-03-30 | 2016-02-16 | Ciena Corporation | Generalized service protection systems and methods |
CN103166868B (zh) * | 2013-03-04 | 2015-09-16 | 杭州华三通信技术有限公司 | 用于防邻居震荡的方法和装置 |
WO2014199471A1 (ja) * | 2013-06-12 | 2014-12-18 | 三菱電機株式会社 | 通信システム、通信装置およびプロテクション方法 |
US9344323B2 (en) * | 2014-01-23 | 2016-05-17 | Ciena Corporation | G.8032 ethernet multiple fault recovery mechanisms |
US9407535B2 (en) | 2014-04-03 | 2016-08-02 | Ciena Corporation | Packet network linear protection systems and methods in a dual home or multi-home configuration |
Citations (2)
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CN1960310A (zh) * | 2006-11-01 | 2007-05-09 | 华为技术有限公司 | 一种实现环网保护的方法及系统 |
CN101075935A (zh) * | 2007-06-27 | 2007-11-21 | 华为技术有限公司 | 一种实现环网保护的方法、系统及装置 |
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JP2002118580A (ja) * | 2000-10-10 | 2002-04-19 | Nec Corp | リングプロテクション方法 |
JP3931088B2 (ja) * | 2002-01-22 | 2007-06-13 | 三菱電機株式会社 | ネットワークシステムおよびネットワーク構成方法 |
JP4020753B2 (ja) * | 2002-10-25 | 2007-12-12 | 富士通株式会社 | リング切替方法 |
JP2005269059A (ja) * | 2004-03-17 | 2005-09-29 | Fujitsu Ltd | データ中継装置、データ中継方法およびデータ中継プログラム |
US8050183B2 (en) * | 2005-05-06 | 2011-11-01 | Cisco Technology, Inc. | System and method for implementing reflector ports within hierarchical networks |
US8345576B2 (en) * | 2007-06-19 | 2013-01-01 | Red Hat, Inc. | Methods and systems for dynamic subring definition within a multi-ring |
CN101741670B (zh) * | 2008-11-27 | 2012-12-19 | 中兴通讯股份有限公司 | 一种多环以太网的保护方法 |
US20120130759A1 (en) * | 2010-11-24 | 2012-05-24 | International Business Machines Corporation | System and method for risk optimized, spatially sensitive preventive maintenance scheduling for asset management |
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2009
- 2009-08-28 CN CN200910167599.7A patent/CN101997748B/zh not_active Expired - Fee Related
- 2009-12-24 JP JP2012525849A patent/JP5465784B2/ja not_active Expired - Fee Related
- 2009-12-24 WO PCT/CN2009/076012 patent/WO2011022917A1/zh active Application Filing
- 2009-12-24 US US13/392,948 patent/US8649261B2/en not_active Expired - Fee Related
- 2009-12-24 EP EP09848649.1A patent/EP2472796A4/en not_active Withdrawn
- 2009-12-24 KR KR1020127004654A patent/KR101302815B1/ko active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1960310A (zh) * | 2006-11-01 | 2007-05-09 | 华为技术有限公司 | 一种实现环网保护的方法及系统 |
CN101075935A (zh) * | 2007-06-27 | 2007-11-21 | 华为技术有限公司 | 一种实现环网保护的方法、系统及装置 |
Non-Patent Citations (3)
Title |
---|
"Ethernet ring protection switching", ITU-T G8032/Y.1344, 30 June 2008 (2008-06-30), XP017466874 * |
"Extreme Networks' Ethernet Automatic Protection Switching (EAPS)", IETF RFC 3619, 31 October 2003 (2003-10-31), XP015009401 * |
See also references of EP2472796A4 * |
Also Published As
Publication number | Publication date |
---|---|
US8649261B2 (en) | 2014-02-11 |
JP2013503511A (ja) | 2013-01-31 |
US20120155246A1 (en) | 2012-06-21 |
EP2472796A4 (en) | 2017-05-03 |
KR20120035943A (ko) | 2012-04-16 |
KR101302815B1 (ko) | 2013-09-02 |
CN101997748A (zh) | 2011-03-30 |
JP5465784B2 (ja) | 2014-04-09 |
CN101997748B (zh) | 2015-08-12 |
EP2472796A1 (en) | 2012-07-04 |
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