CN101478469B - Method and system for RRPP loop link switching - Google Patents
Method and system for RRPP loop link switching Download PDFInfo
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- CN101478469B CN101478469B CN2009100766170A CN200910076617A CN101478469B CN 101478469 B CN101478469 B CN 101478469B CN 2009100766170 A CN2009100766170 A CN 2009100766170A CN 200910076617 A CN200910076617 A CN 200910076617A CN 101478469 B CN101478469 B CN 101478469B
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Abstract
The invention provides a rapid ring protection protocol (RRPP) ring link switching method and a system thereof. Transmission node ports which directly link a RRPP ring and a transmission equipment link are enabled with a fault detection feature, one port of the ports enabled with the fault detection feature, which firstly receives a ring circuit detection message sent from a master node, is used as a detection port, and the other port is used as an assistant port. The method comprises that the transmission node where the assistant port locates forwards a ring circuit detection message after receiving the ring circuit detection message via the assistant port, and copies N ring circuit detection messages and redirects to the detection port via the assistant port, wherein, N is an integer larger than 1; and the transmission node where detection port locates notifies the link fault to the master node if not receiving the ring circuit detection message via the detection port within a set time period after sending the ring circuit detection message via the detection port. The method and the system can reduce traffic interrupting time in the RRPP ring when a fault occurs in the transmission equipment link.
Description
Technical field
The present invention relates to the network communications technology, the method and system that switch on particularly a kind of quick ring protection agreement (RRPP, Rapid Ring Protection) loop chain road.
Background technology
RRPP is the link layer protocol that is specifically designed to Ethernet ring, it can prevent the broadcast storm that data loopback causes when the ether ring is complete, can recover the communication link between each node on the looped network rapidly when arbitrary link disconnects on the ether ring, the ether ring that will enable RRPP usually is called RRPP ring.
Comprise on the common RRPP ring: host node, transmission node and three kinds of network equipments of transmission equipment, as shown in Figure 1, host node and transmission node are to have enabled the network equipment of RRPP and had the port that inserts this RRPP ring, transmission equipment only is used for the connection between the transmission node usually, carries out data message and the work of control message forwarding.Wherein, host node is to initiate the main running node that loop prevention was surveyed and carried out to loop, its master port on the net sends loop probe messages every fixing duration at RRPP ring according to the timing length of Hello timer, if secondary port does not receive the loop probe messages according to the timing length of Fail timer in setting-up time, determine that then the link on the RRPP ring breaks down.When the link on RRPP ring does not have fault, the secondary port of host node (but remains the forwarding state of control on the VLAN being set to blocked state on the data virtual local area network (LAN) (VLAN), guarantee to receive the loop probe messages), can't transmit data message, after detecting link on the RRPP ring and breaking down, the secondary port of host node is switched to forwarding state on data vlan, carry out the forwarding of data message, thereby the transmission node on the assurance RRPP ring can both receive data message, and send common address flush (Common_Flush_FDB) message by Primary port and secondary port, after each transmission node receives the Common_Flush_FDB message, refresh the mac address forwarding table of self.
The method of carrying out the RRPP ring link switchover in the prior art is generally: break down if transmission node perceives self institute's connected link, then send link failure (Link_down) message to host node, after host node receives the Link_down message, the secondary port of host node is switched to forwarding state on data vlan, and by Primary port and secondary port transmission Common_Flush_FDB message, yet, this method is only applicable to link failure and occurs on the direct-connected link of transmission node, if situation as shown in Figure 2 takes place, be link failure occur between the transmission equipment rather than the direct-connected link of transmission node on, then transmission node can't perceive link and breaks down, just can only obtain secondary port the Fail timer then after, carry out the RRPP ring failover.And because the transmission time interval of loop probe messages is generally 2s, the timing length of Fail timer is set at the transmission time interval greater than three loop probe messages, be generally 7s, therefore, the time that fault needs to wait for 7s after taking place can be carried out the link switchover of RRPP ring, and this must cause the flow in the RRPP ring to interrupt for a long time.
Summary of the invention
In view of this, the invention provides a kind of method and system of RRPP ring link switchover, so that fault when occurring in the transmission equipment link, reduces the flow interrupt time in the RRPP ring.
A kind of method of RRPP ring link switchover, enabling the fault detect characteristic on the RRPP ring with on the transmission node port of transmission equipment direct link connection, the port that enabled to receive the loop probe messages that host node sends in the port of fault detect characteristic earlier as detection port, is received that the port of the loop probe messages that host node sends is as assisting port after having enabled in the port of fault detect characteristic; This method comprises:
The transmission node at assistance port place is transmitted described loop probe messages after receiving the loop probe messages by the assistance port, and duplicates N loop probe messages and give described detection port by assisting port redirection; Wherein, N is the integer more than 1;
Do not receive the loop probe messages in the setting-up time of the transmission node at detection port place after sending the loop probe messages, then notify host node link failure to occur by detection port by detection port.
A kind of RRPP ring link switching system, this system comprises: host node, by link-attached first transmission node of transmission equipment and second transmission node, wherein, first transmission node receives the loop probe messages that host node sends earlier than second transmission node, on first transmission node with the port of transmission equipment direct link connection as detection port, on second transmission node with the port of transmission equipment direct link connection as assisting port;
Described second transmission node is used for transmitting described loop probe messages by after assisting port to receive the loop probe messages, and duplicates N loop probe messages and give described first transmission node by assisting port redirection; Wherein, N is the integer more than 1;
Described first transmission node is used for not receiving the loop probe messages by detection port in the setting-up time after sending the loop probe messages by detection port, then notifies described host node link failure to occur.
As can be seen from the above technical solutions, method and system provided by the invention with the transmission node port of transmission equipment direct link connection on enable the fault detect characteristic, by on the assistance port that has enabled the fault detect characteristic, carrying out the redirected transmission of loop probe messages, whether the detection port that has enabled the fault detect characteristic can break down according to the mode detected transmission device link that whether receives the loop probe messages by detection port in setting-up time, thereby the transmission node that has the transmission equipment link in the middle of making can detect the transmission equipment link and break down, and, adopt the mode of this redirected loop probe messages to make that being limited to a loop probe messages detection time sends within the interval, be within the 2s, can notify the host node link to break down, and needn't wait until the fail timer then, the secondary port that promptly needn't wait for the 7s host node does not receive loop probe messages host node and determines that just link breaks down, make RRPP ring realize link switchover fast, reduced the flow interrupt time in the RRPP ring greatly.
Description of drawings
Fig. 1 is the structural representation of RRPP ring;
Fig. 2 for the present invention at RRPP ring fault schematic diagram;
The method schematic diagram that Fig. 3 provides for the embodiment of the invention;
Schematic diagram during use Fig. 3 method handling failure that Fig. 4 provides for the embodiment of the invention;
The system construction drawing that Fig. 5 provides for the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Method provided by the present invention mainly comprises: enabling the fault detect characteristic on the RRPP ring with on the transmission node port of transmission equipment direct link connection, the port that receives the loop probe messages earlier in the port that has enabled the fault detect characteristic is as detection port, and another port is as assisting port; The transmission node at assistance port place is transmitted this loop probe messages after receiving the loop probe messages by the assistance port, and duplicates N loop probe messages and give detection port by assisting port redirection; Do not receive the loop probe messages in the setting-up time of the transmission node at detection port place after sending loop probing message, then notify host node link failure to occur by detection port.Wherein N is the integer more than 1.
Wherein, the time of above-mentioned setting can be less than or equal to the transmission time interval of loop probe messages.
Do not receive the loop probe messages in the setting-up time of the transmission node at detection port place after sending loop probing message, this detection port can also be set to blocked state on data vlan, stop the forwarding of data message by detection port.
After host node receives the notice that link failure occurs, secondary port is switched to forwarding state on data vlan, and send the Common_Flush_FDB message by Primary port and secondary port.
Behind link-recovery, the secondary port of host node can receive the loop probe messages that master port sends, at this moment, host node can revert to blocked state with secondary port on data vlan, and be sent completely address flush (Complete_Flush_FDB) message, notify each transmission equipment to refresh the mac address forwarding table of self.
Below in conjunction with specific embodiment said method is described in detail.With structure shown in Figure 3 is example, transmission node port with the transmission equipment direct link connection on the RRPP ring is the port P2 of transmission node 2 and the port P1 on the transmission node 3, these two ports are enabled the fault detect characteristic, and the port that will be wherein receive the loop probe messages earlier be the port P2 of transmission node 2 as detection port, the port P1 on the transmission node 3 is as assisting port.
After transmission node 2 receives the loop probe messages of host node transmission, by detection port this loop probe messages is sent to transmission node 3, after transmission node 3 receives this loop probe messages by the assistance port, transmit this loop probe messages by the P2 port, and this loop probe messages is duplicated 3 parts be redirected and send to transmission node 2 (is example at this to duplicate 3 parts, also can copy as to be at least other quantity of 1).If transmission node 2 receives the loop probe messages by detection port in setting-up time, determine that then the transmission equipment link is normal, do not do extra process,, can this setting-up time be set to the transmission time interval of loop probe messages, for example 2s herein.If receive 1 or 2 loop probe messages by detection port in setting-up time, transmission node 2 also can not done any operation, because this may be because occur packet loss congested or that problem such as frequently go offline causes in the transmission equipment link.If in setting-up time, do not receive the loop probe messages by detection port, as shown in Figure 4, then determine the transmission equipment link failure, link failure appears in transmission node 2 notice host nodes, more preferably, detection port is set to blocked state on data vlan, stops the forwarding of data message, thereby avoid the broadcast storm that instant loop causes after the transmission link fault recovery.
That is to say that transmission node 2 can write down the loop probe messages number that receives by detection port, and when receiving the loop probe messages of host node transmission, the loop probe messages of record is counted zero clearing at every turn.
Wherein, transmission node 2 notice host nodes occur link failure mode can for: transmission node 2 duplicates a loop probe messages and sends to host node by port P1, if host node receives the loop probe messages by master port, then determine to occur loop fault, secondary port is switched to forwarding state on data vlan, and send the Common_Flush_FDB message by Primary port and secondary port.Perhaps, transmission node 2 still adopts by port P1 and notifies host node to the mode that host node sends the Link_down message, after host node receives the Link_down message, determine to occur loop fault, secondary port is switched to forwarding state on data vlan, and send the Common_Flush_FDB message by Primary port and secondary port.
Transmission node 2 is after being set to blocked state with detection port on data vlan, if in the time of setting, receive the loop probe messages by detection port, then can determine link-recovery, transmission node 2 no longer sends the notice of link failure to host node, for example, no longer be redirected transmission loop probe messages to host node.But for the phenomenon that frequently goes offline and reach the standard grade that prevents that link from may occur, transmission node 2 can't be removed the blocked state of detection port on data vlan.After the secondary port of host node received the loop probe messages, host node sent the Complete_Flush_FDB message, after transmission node 2 receives the Complete_F1ush_FDB message, just detection port can be switched to forwarding state on data vlan.
If link does not recover, the secondary port of host node can not received the loop probe messages, only can constantly receive the notice that the loop of transmission node C transmission breaks down at master port, for example transmission node C is redirected the loop probe messages of returning, and this moment, host node can keep the forwarding state of secondary port on data vlan always.
More than be the detailed description that method provided by the present invention is carried out, below system provided by the present invention be described in detail.The system construction drawing that Fig. 5 provides for the embodiment of the invention, as shown in Figure 5, this system comprises: host node 501, by link-attached first transmission node 502 of transmission equipment and second transmission node 503, wherein, first transmission node, 502 to the second transmission nodes 503 receive the loop probe messages that host node 501 sends earlier, on first transmission node 502 with the port of transmission equipment direct link connection as detection port, on second transmission node 503 with the port of transmission equipment direct link connection as assisting port.
Second transmission node 503 is used for by after assisting port to receive the loop probe messages, the forwarding loop probe messages, and duplicate N loop probe messages and give first transmission node 502 by assisting port redirection; Wherein, N is the integer more than 1.
First transmission node 502 is used for not receiving the loop probe messages by detection port in the setting-up time after sending the loop probe messages by detection port, then notifies host node 501 link failure to occur.
The time of above-mentioned setting can be less than the transmission time interval of loop probe messages, first transmission node 502 can also be used to write down the loop probe messages number that receives by detection port, when receiving the loop probe messages of host node 501 transmissions, with the loop probe messages number zero clearing of record.
If when first transmission node 502 received the loop probe messages of host node 501 transmissions, the loop probe messages number of record was 0, then determines to occur link failure, link failure appears in notice host node 501.
First transmission node 502 sends when not receiving the loop probe messages by detection port in the setting-up time after the loop probe messages by detection port, can also be further used for detection port is set to blocked state on data virtual local area network (LAN) VLAN, behind the Complete_Flush_FDB message that receives host node 501 transmissions, detection port is set to forwarding state on data vlan.
Wherein, first transmission node 502 can adopt and the loop probe messages that receives is duplicated portion send to host node 501 and link failure occurs with notice host node 501, perhaps sends link failure Link_down messages to host node 501 and link failure occurs with notice host node 501.
In addition, first transmission node 502 is after link failure appears in notice host node 501, if receive the loop probe messages by detection port in the setting-up time after sending the loop probe messages by detection port, then link failure appears in expiry notification host node 501.
Host node 501 in this system, be used to receive the notice that link failure occurs after, secondary port is switched to forwarding state on data vlan, and sends common address flush Common_Flush_FDB message by Primary port and secondary port.
In addition, when host node 501 also is used for receiving the loop probe messages by secondary port, secondary port is switched to blocked state on data vlan, and send the Complete_Flush_FDB message by master port.
By above description as can be seen, method and system provided by the present invention has the following advantages:
1) method and system provided by the invention with the transmission node port of transmission equipment direct link connection on enable the fault detect characteristic, by on the assistance port that has enabled the fault detect characteristic, carrying out the redirected transmission of loop probe messages, whether the detection port that has enabled the fault detect characteristic can break down according to the mode detected transmission device link that whether receives the loop probe messages by detection port in setting-up time, thereby the transmission node that has the transmission equipment link in the middle of making can detect the transmission equipment link and break down, and, adopt the mode of this redirected loop probe messages to make that being limited to a loop probe messages detection time sends within the interval, be within the 2s, can notify the host node link to break down, and needn't wait until the fail timer then, the secondary port that promptly needn't wait for the 7s host node does not receive loop probe messages host node and determines that just link breaks down, make RRPP ring realize link switchover fast, reduced the flow interrupt time in the RRPP ring greatly.
2) further, when the transmission node at detection port place determines that the transmission equipment link breaks down, detection port is set to blocked state on data vlan, thereby avoid the broadcast storm that instant loop causes after the transmission link fault recovery, and behind the Complete_Flush_FDB message that receives the host node transmission, just the blocked state of detection port on data vlan can be removed, thereby avoid the transmission equipment link frequently to go offline and influence that the phenomenon of reaching the standard grade causes the RRPP ring road.
3) the present invention is when detected transmission device link fault breaks down with notice host node link, all adopt the mode that is redirected the loop probe messages, agreement to original system is changed less, farthest support the agreement of existing system, and needn't require the transmission node in the system to support other protocol characteristic.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (15)
1. the method for quick ring protection agreement RRPP ring link switchover, it is characterized in that, enabling the fault detect characteristic on the RRPP ring with on the transmission node port of transmission equipment direct link connection, the port that enabled to receive the loop probe messages that host node sends in the port of fault detect characteristic earlier as detection port, is received that the port of the loop probe messages that host node sends is as assisting port after having enabled in the port of fault detect characteristic; This method comprises:
The transmission node at assistance port place is transmitted described loop probe messages after receiving the loop probe messages by the assistance port, and duplicates N loop probe messages and give described detection port by assisting port redirection; Wherein, N is the integer more than 1;
Do not receive the loop probe messages in the setting-up time of the transmission node at detection port place after sending the loop probe messages, then notify host node link failure to occur by detection port by detection port.
2. method according to claim 1 is characterized in that the time of described setting is less than or equal to the transmission time interval of loop probe messages;
The loop probe messages number that the transmission node record at described detection port place receives by detection port is when receiving the loop probe messages of host node transmission, with the loop probe messages number zero clearing of record.
3. method according to claim 1 and 2, it is characterized in that, if receive N loop probe messages by detection port in the setting-up time of the transmission node at described detection port place after sending the loop probe messages by detection port, the loop probe messages number that perhaps receives is not then carried out any operation greater than 0 and less than N.
4. method according to claim 1, it is characterized in that, when not receiving the loop probe messages in the setting-up time of the transmission node at detection port place after sending the loop probe messages by detection port by detection port, also comprise: the transmission node at described detection port place is set to blocked state with detection port on data virtual local area network (LAN) VLAN, until receive that host node sends finish address flush Complete_Flush_FDB message after, detection port is set to forwarding state on data vlan.
5. method according to claim 1, it is characterized in that, described notice host node link failure occurs and comprises: the transmission node at described detection port place duplicates portion with the loop probe messages that receives and sends to host node and link failure occurs with the notice host node, perhaps sends link failure Link_down message to host node and link failure occurs with the notice host node.
6. method according to claim 1 or 5, it is characterized in that, after link failure appears in described notice host node, if receive the loop probe messages by detection port in the setting-up time of the transmission node at described detection port place after sending the loop probe messages by detection port, then link failure appears in the expiry notification host node.
7. method according to claim 1, it is characterized in that, after described host node receives the notice that link failure occurs, secondary port is switched to forwarding state on data vlan, and send common address flush Common_Flush_FDB message by Primary port and secondary port.
8. method according to claim 7 is characterized in that, when described host node receives the loop probe messages by secondary port, secondary port is switched to blocked state on data vlan, and sends the Complete_Flush_FDB message by master port.
9. RRPP ring link switching system, it is characterized in that, this system comprises: host node, by link-attached first transmission node of transmission equipment and second transmission node, wherein, first transmission node receives the loop probe messages that host node sends earlier than second transmission node, on first transmission node with the port of transmission equipment direct link connection as detection port, on second transmission node with the port of transmission equipment direct link connection as assisting port;
Described second transmission node is used for transmitting described loop probe messages by after assisting port to receive the loop probe messages, and duplicates N loop probe messages and give described first transmission node by assisting port redirection; Wherein, N is the integer more than 1;
Described first transmission node is used for not receiving the loop probe messages by detection port in the setting-up time after sending the loop probe messages by detection port, then notifies described host node link failure to occur.
10. system according to claim 9, it is characterized in that, described first transmission node also is used to write down the loop probe messages number that receives by detection port, when receiving the loop probe messages of host node transmission, with the loop probe messages number zero clearing of record.
11. according to claim 9 or 10 described systems, it is characterized in that, described first transmission node sends when not receiving the loop probe messages by detection port in the setting-up time after the loop probe messages by detection port, also be used for detection port is set to blocked state on data vlan, behind the Complete_Flush_FDB message that receives the host node transmission, detection port is set to forwarding state on data vlan.
12. system according to claim 9, it is characterized in that, described first transmission node duplicates portion with the loop probe messages that receives and sends to host node and link failure occurs with the notice host node, perhaps sends the Link_down message to host node and link failure occurs with the notice host node.
13. according to claim 9 or 12 described systems, it is characterized in that, described first transmission node is after link failure appears in the notice host node, if receive the loop probe messages by detection port in the setting-up time after sending the loop probe messages by detection port, then link failure appears in the expiry notification host node.
14. system according to claim 9, it is characterized in that, described host node, be used to receive the notice that link failure occurs after, secondary port is switched to forwarding state on data vlan, and send the Common_Flush_FDB message by Primary port and secondary port.
15. system according to claim 14, it is characterized in that, when described host node also is used for receiving the loop probe messages by secondary port, secondary port is switched to blocked state on data vlan, and send the Complete_Flush_FDB message by master port.
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| CN2009100766170A CN101478469B (en) | 2009-01-12 | 2009-01-12 | Method and system for RRPP loop link switching |
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| CN2009100766170A CN101478469B (en) | 2009-01-12 | 2009-01-12 | Method and system for RRPP loop link switching |
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| CN101478469B true CN101478469B (en) | 2011-06-29 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102035710B (en) * | 2009-09-24 | 2014-04-09 | 中兴通讯股份有限公司 | Method and system for updating blocked port information |
| CN101695046B (en) * | 2009-10-16 | 2012-01-04 | 杭州华三通信技术有限公司 | Method and equipment for arranging RRPP block points |
| CN101707527B (en) * | 2009-11-25 | 2011-09-28 | 杭州华三通信技术有限公司 | Method and equipment for sending multicast data stream |
| CN102104533B (en) * | 2009-12-22 | 2013-06-26 | 杭州华三通信技术有限公司 | Method for optimizing RRPP (rapid ring protection protocol) single ring network data transmitting path and ring network node |
| CN102209018B (en) * | 2010-03-30 | 2013-11-27 | 杭州华三通信技术有限公司 | Live service scheduling method for rapid ring protection protocol ring and node |
| CN102130793B (en) * | 2010-11-29 | 2013-08-07 | 华为技术有限公司 | Method, device and system for processing loop circuit in access network |
| CN104427385A (en) * | 2013-08-22 | 2015-03-18 | 北京卓越信通电子股份有限公司 | Video coding device, vehicle-mounted video playing system and ring network operation method |
| CN106330646B (en) * | 2016-08-19 | 2020-04-10 | 浙江宇视科技有限公司 | Networking control method, device and system |
| CN112073270B (en) * | 2020-09-15 | 2022-03-25 | 新华三信息安全技术有限公司 | Link fault detection method and device |
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| EP1289195B1 (en) * | 2001-09-03 | 2006-09-13 | Alcatel | Method for implementing an OAM function by exchanging request-reply packets between stations of a RPR network, and corresponding packet frames |
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: Xinhua three Technology Co., Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: Huasan Communication Technology Co., Ltd. |
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Granted publication date: 20110629 Termination date: 20200112 |