CN100450036C - Method and apparatus for preventing loop when RRPP and partial STP network damage recovery - Google Patents
Method and apparatus for preventing loop when RRPP and partial STP network damage recovery Download PDFInfo
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- CN100450036C CN100450036C CNB2006101113021A CN200610111302A CN100450036C CN 100450036 C CN100450036 C CN 100450036C CN B2006101113021 A CNB2006101113021 A CN B2006101113021A CN 200610111302 A CN200610111302 A CN 200610111302A CN 100450036 C CN100450036 C CN 100450036C
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Abstract
The invention discloses a method and device for preventing ring occurrence when networking failure of RRPP and local STP is removed, belonging to network management field. And it advances a method which sets temporary blocking time of failure port of transmission node on a failure link to be longer than transmitting time of configuration message and HELLO message of STP and sets the failure port not to block configuration message of STP in the temporary blocking state, thus assuring local STP has detected link recovery by sending configuration message at regular time before the RRPP failure port is released. And it also provides a corresponding device, which can solve the problem of ring occurrence, too.
Description
Technical field
The present invention relates to field of network management, prevent the method and apparatus of loop when particularly a kind of RRPP and partial STP network damage recovery.
Background technology
RRPP (the quick ring protection agreement of Rapid Ring Protection Protocol) is a link layer protocol that is specifically applied to Ethernet ring.It can prevent that when Ethernet ring is complete data loopback from causing broadcast storm, and can enable backup link rapidly to recover the communication path between each node on the looped network when a link disconnects on the Ethernet ring.RRPP link failure detection Restoration Mechanism mainly depends on Polling mechanism and link-state change informing mechanism.
Polling mechanism is the mechanism of the host node active detecting looped network health status of RRPP ring.Host node cycle ground sends the HELLO message from its master port, propagate on ring through each transmission node successively, if host node can be received the HELLO message that oneself sends from secondary port, illustrate that loop network link is complete, meanwhile in order to prevent the appearance of loop, the secondary port of host node can block, and secondary port only allows agreement HELLO message to pass through, and other message is blocked; If the secondary port of host node can not receive the HELLO message at the appointed time, just think looped network generation link failure, decontrol secondary port; When faulty link recovers, transmission node restarts on the faulty link, and block non-working port temporarily, the host node that is in the Failed state is received the HELLO message that oneself sends from secondary port, move to the Complete state immediately, again block secondary port and refresh FDB (mac address forwarding table), but also can decontrol the non-working port of interim obstruction when faulty link recovers and refresh FDB from the transmission node that master port sends on the COMPLETE_FLUSH_FDB message notifying faulty link.
The link-state change informing mechanism provides the treatment mechanism that changes than the faster ring-network topology of Polling mechanism, and this machine-processed promoter is a transmission node.Always at the port Link State of monitoring oneself, in case state changes, it will be decided by host node and how to handle by sending the notice message this change notification host node transmission node then.When transmission node detects port UP, will send the LINK-UP message to ring from the RRPP port of pairing; When if transmission node detects port Down, will send the LINK-DOWN message to ring from the RRPP port of pairing.
In the network that constitutes by Layer 2 switch/bridge, the Spanning-Tree Protocol of Ethernet (STP-Spanning TreeProtocol) is used the unique path that generates source to destination, prevent path Cheng Huan simultaneously, avoid Frame Infinite Cyclic (particularly the circulation of broadcast frame sends, so that form broadcast storm) in ring.When STP also is supported in network topology and changes, calculate and generate new path, to finish professional recovery.STP is the part of IEEE 802.1D network bridge protocol, and its algorithm basic thought generates " one tree " exactly, and the root of tree is a switching node that is called as the root bridge.According to difference is set, different nodes can be chosen as the root bridge, but can only there be a root bridge any time.Behind network startup, send out Bridge Protocol Data Unit (Bridge Protocol Data Unit BPDU) message between each node mutually to confirm who is a root node, find the shortest path of this node to root node, be clogged to other path (port) of root node.Begin by the root bridge like this, form one tree step by step.After the network stabilization, root bridge timed sending configuration message is when certain port can not receive configuration message for a long time, root node thinks that this configuring ports is overtime, network topology may change, and recomputate network topology this moment, regenerates one tree.
As shown in Figure 1, when RRPP and local STP networking, in order to prevent the appearance of loop, the secondary port of equipment 6 and the left side port of equipment 3 all are in blocked state, other port on equipment 6, the equipment 3 and the port on other transmission node all are in the relieving state, and the secondary port of equipment 6 only allows agreement HELLO message to pass through, and other message is blocked, the left side port of equipment 3 only allows the STP configuration message to pass through, and other message is blocked.Host node equipment 6 on the RRPP ring periodically sends the HELLO message to RRPP ring from its master port, is used to detect the state of each bar link on the RRPP ring.The master port of HELLO message slave unit 6 sends, and through equipment 5, equipment 4, equipment 1, equipment 2, equipment 7, finishes the transmission of HELLO message at last by the secondary port of equipment 6, and then finishes the detection of RRPP ring uplink; The root node equipment 3 of local STP sends the STP configuration message from its right side port to mixed networking, be used to monitor the state of STP link, because under the mixed networking normal condition, the secondary port of host node equipment 6 blocks the STP configuration message, so the STP configuration message can only pass through equipment 2, equipment 1, finish the transmission of STP configuration message at last by the left side port of root node equipment 3, and then finish the detection of STP link.
As shown in Figure 2, if the link between equipment 4 and the equipment 5, fault has appearred in the link between equipment 1 and the equipment 2, equipment 4, equipment 5, equipment 1, equipment 2 will send LINK-DOWN notice message to equipment 6, equipment 6 is received and is known behind the LINK-DOWN notice message and occurred link failure on the RRPP ring, equipment 6 can be decontroled the secondary port of oneself, the left side port of equipment 3 is not because receive the STP configuration message that oneself sends, so equipment 3 can be decontroled the left side port of oneself, equipment 6, other port on the equipment 3 and the port on other transmission node also all are in link relieving state just often.
As shown in Figure 3, faulty link between equipment 4 and equipment 5 recovers, when the faulty link between equipment 1 and the equipment 2 does not recover, malfunctioning node equipment 5 and equipment 4 send LINK-UP notice message to equipment 6, and interim simultaneously the obstruction its left side port and upper port a period of time, be 3 times of HELLO packet sending intervals blocking time generally speaking, and the left side port of equipment 5 and the upper port of equipment 4 can only allow agreement HELLO message to pass through in blocking time, message to other blocks, because the link between equipment 1 and the equipment 2 does not recover, the secondary port of equipment 6 can not receive the HELLO message that oneself sends, so the secondary port of equipment 6 is also kept the relieving state.The left side port of equipment 5 and the upper port of equipment 4 can be decontroled after through 3 times HELLO packet sending intervals automatically, from decontroling the left side port of equipment 3
In receiving that the STP configuration message that oneself sends during this period of time, all decontrols,, can cause broadcast storm in the time of seriously, to making network paralysis so just caused the appearance of loop owing to form the port of loop.
As shown in Figure 4, faulty link between equipment 1 and equipment 2 recovers, when the faulty link between equipment 5 and the equipment 4 does not recover, malfunctioning node equipment 1 and equipment 2 send LINK-UP notice message to equipment 6, and interim simultaneously the obstruction its right side port and left side port a period of time, be 3 times of HELLO packet sending intervals blocking time generally speaking, and the right side port of equipment 1 and the left side port of equipment 2 only allow agreement HELLO message to pass through in blocking time, message to other blocks, because the link between equipment 4 and the equipment 5 does not recover, the secondary port of equipment 6 can not receive the HELLO message that oneself sends, so the secondary port of equipment 6 is also kept the relieving state.The right side port of equipment 1 and the left side port of equipment 2 can be decontroled after through 3 times HELLO packet sending intervals automatically, in receiving that from the left side port of decontroling equipment 3 the STP configuration message that oneself sends during this period of time, because forming the port of loop all decontrols, so just caused the appearance of loop, also can cause broadcast storm when serious, to making network paralysis.
The problem that loop occurs when recovering for above-mentioned networking faulty link is gone back the effective solution of neither one in the prior art at present.
Summary of the invention
For fear of above-mentioned RRPP and local STP networking, the problem of loop appears in faulty link when recovering, the interim blocking time that the present invention proposes a kind of non-working port that transmission node on the faulty link is set greater than the transmission of the configuration message of STP and HELLO message at interval, and non-working port does not block the method for the configuration message of STP when being in interim blocked state, and local STP has detected link-recovery by the timed sending configuration message to guarantee to decontrol before by the RRPP non-working port with this.Said method comprising the steps of:
Steps A: temporarily block the non-working port that has recovered on the faulty link;
Step B: is set the interim blocking time of described non-working port, and described interim blocking time greater than the transmission of STP configuration message at interval and the transmission interval of the HELLO message that sends of RRPP host node;
Step C: enable the function of or not the STP configuration message when described non-working port is in interim obstruction;
Step D: after the equipment of transmission detection messages is received the detection messages that oneself sends, block described detection messages receiving port.
Send at interval 2-3 doubly for the STP configuration message the interim blocking time of described non-working port.
Described step D specifically comprises: after receiving the STP configuration message that oneself sends when the root node of STP, block the STP configuration message receiving port of described root node.
The present invention prevents the device of loop when a kind of RRPP and partial STP network damage recovery also are provided, described device comprises module, non-working port enable module, occlusion detection message sink mouth module are set interim obstruction non-working port module, interim blocking time;
Described interim obstruction non-working port module is used for blocking the non-working port that has recovered on the faulty link temporarily;
Is set the interim blocking time that module is used to be provided with described non-working port described interim blocking time, and described interim blocking time greater than the transmission of STP configuration message at interval and the transmission interval of the HELLO message that sends of RRPP host node;
Described non-working port enable module is used to enable the function of or not the STP configuration message when described non-working port is in interim obstruction;
Described occlusion detection message sink mouth module is used for blocking described detection messages receiving port after the equipment that sends detection messages is received the detection messages that oneself sends.
Send at interval 2-3 doubly for the STP configuration message the interim blocking time that non-working port described in the module is set described interim blocking time.
Described occlusion detection message sink mouth module is specially STP port block unit, is used for blocking the STP configuration message receiving port of described root node after the root node of STP is received the STP configuration message that oneself sends.
Adopt technical scheme of the present invention to solve RRPP and local STP networking effectively, the problem that loop occurred when faulty link recovered.
Description of drawings
Fig. 1 is RRPP and local STP networking schematic diagram;
Fig. 2 is that two point failure schematic diagrames appear in RRPP and local STP;
Fig. 3 is the schematic diagram that link-recovery causes loop between equipment 4 and the equipment 5;
Fig. 4 is the schematic diagram that link-recovery causes loop between equipment 1 and the equipment 2;
Fig. 5 is the schematic diagram that single-link recovers to cause loop;
Fig. 6 is the flow chart of embodiment 1 of the present invention;
Fig. 7 is the flow chart of embodiment 2 of the present invention;
Fig. 8 is the flow chart of embodiment 3 of the present invention;
Fig. 9 prevents the structure drawing of device of loop when being RRPP and partial STP network damage recovery.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Referring to Fig. 2, RRPP and local STP networking, two link failures appear in RRPP ring, suppose it is respectively link between equipment 4 and the equipment 5, link between equipment 1 and the equipment 2 is provided with the transmission of HELLO message and is spaced apart X second, and the configuration message that STP is set sends and is spaced apart Y second.
Embodiment 1
Referring to Fig. 3 and Fig. 6, the faulty link between equipment 4 and equipment 5 recovers, and when the faulty link between equipment 1 and the equipment 2 does not recover, prevents that the method that loop occurs from may further comprise the steps:
Step 101: malfunctioning node equipment 5 and equipment 4 send LINK-UP notice message to equipment 6, and interim simultaneously its left side port and upper port of blocking;
Step 102: for the upper port of the left side port that prevents equipment 5 and equipment 4 is received formation loop in the STP configuration message that oneself sends during this period of time at the overtime left side port of decontroling equipment 3, the left side port of equipment 5 and the upper port of equipment 4 are set are specifically as follows (2-3) Y greater than Y interim blocking time;
Step 103: in order to make the STP configuration message when the upper port of the left side of equipment 5 port and equipment 4 is in interim obstruction, can detect the configuration message function of or not STP when the left side port of enabled devices 5 and the upper port of equipment 4 are in interim obstruction to link;
Step 104: the right side port of equipment 3 sends the STP configuration message, through equipment 2, equipment 7, equipment 6, left side port to equipment 5, because the left side port of equipment 5 does not block the STP configuration message, so the STP configuration message can forward the upper port of equipment 4 thoroughly to, because the upper port of equipment 4 is not blocked the STP configuration message, so the STP configuration message can forward the lower port of equipment 4 thoroughly to, pass through equipment 1 again, the left side port of equipment 3 is got back to equipment 3, and the left side port of equipment 3 has been received the STP configuration message of own transmission when the upper port of the left side of equipment 5 port and equipment 4 is in interim obstruction like this;
Step 105: equipment 3 detects the link-recovery between equipment 4 and the equipment 5 owing to received the STP configuration message of own transmission, thereby blocks the left side port of oneself.
When equipment 3 sends STP configuration message detection STP link, equipment 6 also detects the RRPP ring road at transmission HELLO message from its master port, but because the link between equipment 1 and the equipment 2 disconnects, the secondary port of equipment 6 can not receive the HELLO message that oneself sends, so the secondary port of equipment 6 detects in the STP link process at the STP configuration message, because never receive the HELLO message that oneself sends, its secondary port is in the relieving state always.
Embodiment 2
Referring to Fig. 4 and Fig. 7, the faulty link between equipment 1 and equipment 2 recovers, and when the faulty link between equipment 4 and the equipment 5 does not recover, prevents that the method that loop occurs from may further comprise the steps:
Step 201: malfunctioning node equipment 1 and equipment 2 send LINK-UP notice message to equipment 6, and interim simultaneously its right side port and the left side port of blocking;
Step 202: for the right side port of the left side port that prevents equipment 2 and equipment 1 is received formation loop in the STP configuration message that oneself sends during this period of time at the overtime left side port of decontroling equipment 3, the left side port of equipment 2 and the right side port of equipment 1 are set are specifically as follows (2-3) Y greater than Y interim blocking time;
Step 203: in order to make the STP configuration message when the right output port of the left side of equipment 2 port and equipment 1 is in interim obstruction, can detect the configuration message function that the left side port of enabled devices 2 and the right side port of equipment 1 or not STP when being in interim obstruction to link;
Step 204: the right side port of equipment 3 sends the STP configuration message, arrive the left side port of equipment 2 through the lower port of equipment 2, because the left side port of equipment 2 does not block the STP configuration message, so the STP configuration message can forward the right side port of equipment 1 thoroughly to, because the right side port of equipment 1 does not block the STP configuration message, so the STP configuration message can forward the lower port of equipment 1 thoroughly to, get back to equipment 3 through the left side port of equipment 3 again, the left side port of equipment 3 has been received the STP configuration message of own transmission when the right side port of the left side of equipment 2 port and equipment 1 is in interim obstruction like this;
Step 205: equipment 3 detects the link-recovery between equipment 1 and the equipment 2 owing to received the STP configuration message of own transmission, thereby blocks the left side port of oneself.
When equipment 3 sends STP configuration message detection STP link, equipment 6 also detects the RRPP ring road at transmission HELLO message from its master port, but because the link between equipment 4 and the equipment 5 disconnects, the secondary port of equipment 6 can not receive the HELLO message that oneself sends, so the secondary port of equipment 6 detects in the STP link process at the STP configuration message, because never receive the HELLO message that oneself sends, its secondary port is in the relieving state always.
Embodiment 1 and embodiment 2 are owing to enabled to be in the function that the non-working port under the interim blocked state does not block the STP configuration message, make the STP configuration message when non-working port is in interim obstruction, can also carry out the detection of STP link, and owing to be provided with the transmission time interval of the interim blocking time of non-working port greater than the STP configuration message, thereby guaranteed that the STP configuration message is when non-working port is in interim blocked state, detected the STP link-recovery, will block according to the STP configuration message receiving port of STP agreement like this root node, fundamentally solved in the prior art, the overtime automatic root node of decontroling of the interim non-working port that blocks receives that the STP configuration message that oneself sends can produce the problem of loop during this period of time.
When the method for the invention is recovered for the wall scroll faulty link, equally also can prevent the generation of loop, illustrate with an example below.
Embodiment 3
Referring to Fig. 5 and Fig. 8, when having only a link to break down, for example the link between equipment 4 and the equipment 5 breaks down, and when the faulty link between equipment 4 and the equipment 5 recovers, prevents that the method that loop occurs from may further comprise the steps:
Step 301: malfunctioning node equipment 5 and equipment 4 send LINK-UP notice message to equipment 6, and interim simultaneously its left side port and upper port of blocking;
Step 302: for the upper port of the left side port that prevents equipment 5 and equipment 4 is received formation loop in the HELLO message that oneself sends during this period of time at the overtime secondary port of decontroling equipment 6, the left side port of equipment 5 and the upper port of equipment 4 are set are specifically as follows 3X greater than X interim blocking time;
Step 303: the configuration message function of or not STP when the left side port of enabled devices 5 and the upper port of equipment 4 are in interim obstruction;
When step 302 and step 303 had guaranteed that the upper port of the left side port of equipment 5 and equipment 4 is in interim obstruction, the link that the HELLO message has detected between equipment 4 and the equipment 5 recovered, and the STP configuration message also can detect the STP link.
Step 304: the master port of equipment 6 sends the HELLO message, through equipment 5, equipment 4, equipment 1, equipment 2, equipment 7, the secondary port of equipment 6 is got back to equipment 6, and the secondary port of equipment 6 has been received the HELLO message of own transmission when the upper port of equipment 4 is in interim obstruction at the left side of equipment 5 port like this;
Step 305: the secondary port of equipment 6 has been received the HELLO message of own transmission, detects the link-recovery between equipment 4 and the equipment 5, thereby blocks the secondary port of oneself.
In embodiment 3, at equipment 6 when its master port sends the HELLO message and detects the RRPP link, the right side port of equipment 3 is also sending the detection that the STP configuration message carries out the STP link always, because the link between equipment 1 and the equipment 2 is normal, the left side port of equipment 3 can be received the STP configuration message that oneself sends all the time, therefore the left side port of equipment 3 is in blocked state always, thereby has guaranteed that the STP link loop can not occur, as long as it is just passable to prevent that loop from appearring in RRPP ring.
The appearance of loop when preventing that the local networking faulty link of RRPP and STP from recovering, be an enough big value the interim blocking time that non-working port can be set, promptly send at interval greater than the HELLO message, no matter also send at interval greater than the STP configuration message simultaneously, be the problem that loop appears when recovering in wall scroll faulty link or many faulty links thereby solved RRPP and the local networking of STP.
Referring to Fig. 7, the present invention prevents the device of loop when a kind of RRPP and partial STP network damage recovery also are provided, device comprises module, non-working port enable module, occlusion detection message sink mouth module are set interim obstruction non-working port module, interim blocking time;
The interim non-working port module of blocking is used for blocking the non-working port that has recovered on the faulty link temporarily;
Is set the interim blocking time that module is used to be provided with non-working port interim blocking time, and interim blocking time greater than the transmission of STP configuration message at interval and the transmission interval of the HELLO message that sends of RRPP host node;
The non-working port enable module is used to enable the function of or not the STP configuration message when non-working port is in interim obstruction;
Occlusion detection message sink mouth module is used for after the equipment that sends detection messages is received the detection messages that oneself sends, occlusion detection message sink mouth.
Occlusion detection message sink mouth module is specially STP port block unit, is used for blocking the STP configuration message receiving port of root node after the root node of STP is received the STP configuration message that oneself sends.
Above-described embodiment is more preferably embodiment a kind of of the present invention, and the common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacing all should be included in protection scope of the present invention.
Claims (6)
1. prevent the method for loop when RRPP and partial STP network damage recovery, it is characterized in that, said method comprising the steps of:
Steps A: temporarily block the non-working port that has recovered on the faulty link;
Step B: is set the interim blocking time of described non-working port, and described interim blocking time greater than the transmission of STP configuration message at interval and the transmission interval of the HELLO message that sends of RRPP host node;
Step C: enable the function of or not the STP configuration message when described non-working port is in interim obstruction;
Step D: after the equipment of transmission detection messages is received the detection messages that oneself sends, block described detection messages receiving port.
2. prevent the method for loop when RRPP as claimed in claim 1 and partial STP network damage recovery, it is characterized in that send at interval 2-3 doubly for the STP configuration message the interim blocking time of described non-working port.
3. prevent the method for loop when RRPP as claimed in claim 1 and partial STP network damage recovery, it is characterized in that, described step D specifically comprises: after receiving the STP configuration message that oneself sends when the root node of STP, block the STP configuration message receiving port of described root node.
4. prevent the device of loop when RRPP and partial STP network damage recovery, it is characterized in that described device comprises module, non-working port enable module, occlusion detection message sink mouth module are set interim obstruction non-working port module, interim blocking time;
Described interim obstruction non-working port module is used for blocking the non-working port that has recovered on the faulty link temporarily;
Is set the interim blocking time that module is used to be provided with described non-working port described interim blocking time, and described interim blocking time greater than the transmission of STP configuration message at interval and the transmission interval of the HELLO message that sends of RRPP host node;
Described non-working port enable module is used to enable the function of or not the STP configuration message when described non-working port is in interim obstruction;
Described occlusion detection message sink mouth module is used for blocking described detection messages receiving port after the equipment that sends detection messages is received the detection messages that oneself sends.
5. prevent the device of loop when RRPP as claimed in claim 4 and partial STP network damage recovery, it is characterized in that send at interval 2-3 doubly for the STP configuration message the interim blocking time that non-working port described in the module is set described interim blocking time.
6. prevent the device of loop when RRPP as claimed in claim 2 and partial STP network damage recovery, it is characterized in that, described occlusion detection message sink mouth module is specially STP port block unit, be used for after the root node of STP is received the STP configuration message that oneself sends, blocking the STP configuration message receiving port of described root node.
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| CNB2006101113021A CN100450036C (en) | 2006-08-18 | 2006-08-18 | Method and apparatus for preventing loop when RRPP and partial STP network damage recovery |
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| CNB2006101113021A CN100450036C (en) | 2006-08-18 | 2006-08-18 | Method and apparatus for preventing loop when RRPP and partial STP network damage recovery |
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| CN100450036C true CN100450036C (en) | 2009-01-07 |
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| CN101022390B (en) * | 2007-03-21 | 2010-07-28 | 华为技术有限公司 | Method, system and equipment for protecting double-return switch-in RRPP loop network |
| CN101296150B (en) * | 2007-04-29 | 2011-05-11 | 中兴通讯股份有限公司 | Method and device for implementing service intercommunication by ZESR and STP mixed networking |
| CN101252426B (en) * | 2007-09-11 | 2011-05-11 | 北京东土科技股份有限公司 | Method for realizing high-reliability distributed redundant looped network |
| CN101207521A (en) * | 2007-12-12 | 2008-06-25 | 华为技术有限公司 | Method for fault detection and convergence of Ethernet and node apparatus |
| CN101686158B (en) * | 2008-09-22 | 2012-11-14 | 中兴通讯股份有限公司 | Control method for Ethernet loop guard fault recovery and Ethernet loop node |
| CN101478469B (en) * | 2009-01-12 | 2011-06-29 | 杭州华三通信技术有限公司 | Method and system for RRPP loop link switching |
| CN101729349B (en) * | 2009-09-25 | 2012-01-04 | 杭州华三通信技术有限公司 | RRPP-based detection method and device for connectivity of main ring access |
| 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 |
| US20120113870A1 (en) * | 2010-01-29 | 2012-05-10 | Hewlett-Packard Development Company, L.P. | Configuration of network links in a virtual connection environment |
| CN102480409B (en) * | 2010-11-22 | 2014-10-22 | 杭州华三通信技术有限公司 | Method for realizing rapid ring protection protocol (RRPP) loop shunting uplink, RRPP loop and device |
| CN103532811B (en) * | 2013-10-16 | 2017-01-18 | 杭州华三通信技术有限公司 | Method and equipment for configuring RRPP (Rapid Ring Protection Protocol) ring assembly |
| CN104486164B (en) * | 2014-12-26 | 2017-12-08 | 新华三技术有限公司 | A kind of link failure detection method and device |
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