CN101217443A - Ethernet loop network protection method and transmission node - Google Patents
Ethernet loop network protection method and transmission node Download PDFInfo
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- CN101217443A CN101217443A CNA200810056536XA CN200810056536A CN101217443A CN 101217443 A CN101217443 A CN 101217443A CN A200810056536X A CNA200810056536X A CN A200810056536XA CN 200810056536 A CN200810056536 A CN 200810056536A CN 101217443 A CN101217443 A CN 101217443A
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Abstract
The invention provides a method for Ethernet ring protection and transmission node of Ethernet ring. When fault occurs in the ring, the transmission node of the Ethernet ring which senses the fault generates message of Ethernet ring fault and sends the message of Ethernet ring fault in the ring and refreshes its own media access control item, or, a delay timer is started at the same time when the message of Ethernet ring fault is being sent. When the delay timer reaches the timing time-period, its own media access control item is refreshed. When other transmission nodes receive the message of Ethernet ring fault, the transmission nodes send the message of Ethernet ring fault and determine that fault really occurs in the ring according to the message of Ethernet ring fault. When fault really occurs in the ring, its own media access control item is refreshed, or, the delay timer is started at the same time when the message of Ethernet ring fault is being sent, when the delay timer reaches the timing time-period, its own media access control item is refreshed. Therefore, operation interrupt time caused by the untimely refreshment of the MAC item by the transmission nodes can be reduced.
Description
Technical field
The present invention relates to the network communications technology, particularly a kind of Ethernet ring protection method and transmission node.
Background technology
It is online that the method for Ethernet automatic protection switching is applied in Ethernet ring, and there is a host node in an Ethernet looped network, and other network node is a transmission node.Fig. 1 is the structural representation of an Ethernet looped network in the prior art, S1 is a host node among the figure, and other S2 to S6 is a transmission node, wherein, host node is connected in two online ports of Ethernet ring one and is master port (P1 among Fig. 1), and another is secondary port (P2 among Fig. 1).If looped network does not break down, then the secondary port of host node is a blocked state; If looped network breaks down, then the open secondary port of host node is transmitted data message, to keep the connectedness of looped network.
The guard method of breaking down at looped network in the prior art is: when looped network breaks down; as shown in Figure 1; suppose that ring network fault point is between transmission node S4 and S5; after S4 and S5 detect the fault generation; on looped network, send ring network fault (LINK_DOWN) message; each transmission node is left intact to this LINK_DOWN message after receiving this LINK_DOWN message, directly this LINK_DOWN message is transmitted until host node S1.Host node S1 opens secondary port after receiving this LINK_DOWN message; and on looped network, send looped network by Primary port and secondary port and refresh (RING_DOWN_FLUSH_FDB) message; each transmission node refreshes the MAC address entries of self when receiving this RING_DOWN_FLUSH_FDB message, thereby realizes the looped network protection of Ethernet.
But, in this method of prior art, except triggering medium access control (MAC) list item that refreshes self by receiving the RING_DOWN_FLUSH_FDB message such as other transmission node S4 among Fig. 1 and the S5, if the RING_DOWN_FLUSH_FDB message is lost in process of transmitting, the transmission node that does not then receive this RING_DOWN_FLUSH_FDB message need be waited for the natural aging of MAC address entries, promptly arrives the MAC address entries that just refreshes self after the ageing time of MAC address entries; If the host node on the looped network breaks down, then can't on looped network, send the RING_DOWN_FLUSH_FDB message, each transmission node needs also to wait for that the natural aging of MAC address entries just refreshes the MAC address entries of self.Yet the ageing time of MAC address entries is longer, is generally minute level, and transmission node can not in time refresh MAC address entries in this ageing time, will cause long looped network obstructed, and business can't normally be carried out.
Summary of the invention
The embodiment of the invention provides a kind of ring net protection method and transmission node, can reduce because of transmission node can't in time refresh MAC address entries and cause time of service interruption.
A kind of method of Ethernet ring protection, this method comprises:
When looped network breaks down, after generating ring network fault LINK_DOWN message, the transmission node that perceives fault in the ethernet ring network in looped network, sends this LINK_DOWN message;
After other transmission nodes receive this LINK_DOWN message, send this LINK_DOWN message, and determine that according to this LINK_DOWN message looped network breaks down;
When determining that looped network breaks down, described other transmission nodes refresh the media access control MAC list item of self, perhaps, start back off timer when sending described LINK_DOWN message, the timing length of back off timer then, described other transmission nodes refresh the MAC address entries of self.
A kind of method of Ethernet ring protection, this method comprises:
When looped network breaks down, after generating the LINK_DOWN message, the node that perceives fault in the ethernet ring network in looped network, sends this LINK_DOWN message, and refresh the MAC address entries of self, perhaps, when sending described LINK_DOWN message, start back off timer, the timing length of back off timer then refreshes the MAC address entries of self.
A kind of transmission node, this transmission node comprises: message receiving element, packet sending unit, fault determining unit and list item refresh unit;
Described message receiving element is used to receive the LINK_DOWN message;
Described packet sending unit is used to send the LINK_DOWN message that described message receiving element receives;
Described fault determining unit is used to utilize described LINK_DOWN message to determine that looped network breaks down, and sends refresh notification to described list item refresh unit;
Described list item refresh unit is used for refreshing the MAC address entries of this transmission node after the refresh notification that receives described fault determining unit transmission.
A kind of transmission node, this transmission node comprises: message receiving element, packet sending unit, fault determining unit, back off timer and list item refresh unit;
Described message receiving element is used to receive the LINK_DOWN message;
Described packet sending unit is used to send the LINK_DOWN message that described message receiving element receives;
Described fault determining unit is used to utilize described LINK_DOWN message to determine that looped network breaks down, and at described back off timer then, sends refresh notification to described list item refresh unit;
Described back off timer is used for when described packet sending unit sends described LINK_DOWN message, starts regularly;
Described list item refresh unit is used for refreshing the MAC address entries of this transmission node after the refresh notification that receives described fault determining unit transmission.
A kind of transmission node, this transmission node comprises: fault perception unit, message generation unit, packet sending unit and list item refresh unit;
Described fault perception unit is used for the perception ethernet ring network and breaks down;
Described message generation unit is used for perceiving in fault perception unit the ethernet ring network back of breaking down and generates the LINK_DOWN message;
Described packet sending unit is used to send the LINK_DOWN message of described generation;
Described list item refresh unit is used for perceiving after ethernet ring network breaks down in described fault perception unit, refreshes the MAC address entries of self.
A kind of transmission node, this transmission node comprises: fault perception unit, message generation unit, packet sending unit, back off timer and list item refresh unit;
Described fault perception unit is used for the perception ethernet ring network and breaks down;
Described message generation unit is used for perceiving in fault perception unit the ethernet ring network back of breaking down and generates the LINK_DOWN message;
Described packet sending unit is used to send the LINK_DOWN message of described generation;
Described back off timer is used for starting when described packet sending unit sends the LINK_DOWN message regularly;
Described list item refresh unit is used at the timing length of described back off timer then refreshing the MAC address entries of self.
As can be seen from the above technical solutions; the method of the Ethernet ring protection that the embodiment of the invention provides and transmission node; when refreshing MAC address entries and do not rely on the RING_DOWN_FLUSH_FDB message and trigger; even if RING_DOWN_FLUSH_FDB message dropping or host node break down and can't send the RING_DOWN_FLUSH_FDB message; also can determine that looped network breaks down and refresh the MAC address entries of self automatically according to this LINK_DOWN message that receives; and needn't wait for that the MAC address entries natural aging refreshes MAC address entries, can reduce because of transmission node can't in time refresh MAC address entries and cause time of service interruption.
Description of drawings
Fig. 1 is the structural representation of an Ethernet looped network in the prior art;
First kind of transmission node structure chart that Fig. 2 provides for the embodiment of the invention;
Second kind of transmission node structure chart that Fig. 3 provides for the embodiment of the invention;
The third transmission node structure chart that Fig. 4 provides for the embodiment of the invention;
The 4th kind of transmission node structure chart 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.
The method that the embodiment of the invention provides mainly comprises: when looped network breaks down, after generating the LINK_DOWN message, the transmission node that perceives fault in the ethernet ring network in looped network, sends this LINK_DOWN message, and refresh the MAC address entries of self, perhaps, when sending described LINK_DOWN message, start back off timer, the timing length of back off timer then refreshes the MAC address entries of self; After other transmission nodes receive this LINK_DOWN message, send this LINK_DOWN message, and determine that according to this LINK_DOWN message looped network breaks down; When determining that looped network breaks down, described other transmission nodes refresh the media access control MAC list item of self, perhaps, start back off timer when sending described LINK_DOWN message, the timing length of back off timer then, described other transmission nodes refresh the MAC address entries of self.
Below in conjunction with specific embodiment this method is described.It still is example with Fig. 1, after transmission node S4 and S5 detect looped network and break down, generate the LINK_DOWN message, and send the LINK_DOWN message of this generation, because this transmission node S4 and S5 detect looped network and break down, therefore, transmission node S4 and S5 can determine that directly looped network breaks down when generating the LINK_DOWN message, and refresh the MAC address entries of self.Also can start back off timer when generating the LINK_DOWN message, this back off timer can be set an of short duration timing length, for example several seconds regularly, at this timing length then, refreshes the MAC address entries of self.If the timing length of back off timer not then S4 or S5 receive the RING_DOWN_FLUSH_FDB message, then refresh the MAC address entries of self immediately and stop back off timer.
Other transmission node among Fig. 1 except S4 and S5, be S2, S3, S6, after receiving the LINK_DOWN message, when transmitting this LINK_DOWN message, CPU with the LINK_DOWN message reporting self that receives, break down thereby make self CPU can perceive looped network, the CPU of this transmission node can determine that looped network breaks down after receiving this LINK_DOWN message, notifies this transmission node to refresh the MAC address entries of self; Also can start back off timer after CPU receives this LINK_DOWN message, same, this back off timer can be set an of short duration timing length, and for example several seconds regularly, at this timing length then, this transmission node refreshes the MAC address entries of self.This transmission node is received the RING_DOWN_FLUSH_FDB message, then refreshes the MAC address entries of self immediately and stops back off timer if at the timing length of back off timer not then.
Host node S1 opens secondary port after receiving the LINK_DOWN message, and sends the RING_DOWN_FLUSH_FDB message by Primary port and secondary port on looped network.
In said process, refresh MAC address entries and refer to and remove existing port mac record, like this, just can utilize new port to receive and send data, thus the assurance business normally carry out, this part that refreshes MAC address entries is a prior art, does not repeat them here.
The transmission node that the embodiment of the invention is provided is described in detail below, a kind of transmission node structure chart that Fig. 2 provides for the embodiment of the invention, as shown in Figure 2, this transmission node can comprise: message receiving element 201, packet sending unit 202, fault determining unit 203 and list item refresh unit 204.
Fault determining unit 203 is used to utilize the LINK_DOWN message to determine that looped network breaks down, and sends refresh notification to list item refresh unit 204.
List item refresh unit 204 is used for refreshing the MAC address entries of this transmission node after the refresh notification that receives 203 transmissions of fault determining unit.
Wherein, fault determining unit 203 can comprise: message reporting subelement 2031 and refresh notification subelement 2032.
Second kind of transmission node structure chart that Fig. 3 provides for the embodiment of the invention, as shown in Figure 3, this transmission node can comprise: message receiving element 301, packet sending unit 302, fault determining unit 303, back off timer 304 and list item refresh unit 305.
Message receiving element 301 is used to receive the LINK_DOWN message.
Packet sending unit 302 is used to send the LINK_DOWN message that message receiving element 301 receives.
Fault determining unit 303 is used to utilize the LINK_DOWN message to determine that looped network breaks down, and at the setting duration of back off timer 304 then, sends refresh notification to list item refresh unit 305.
Back off timer 304 is used for starting regularly when packet sending unit 302 sends the LINK_DOWN message.
List item refresh unit 305 is used for refreshing the MAC address entries of this transmission node after the refresh notification that receives 303 transmissions of fault determining unit.
In addition, message receiving element 302 also is used to receive the RING_DOWN_FLUSH_FDB message.
Back off timer 304 also is used for when message receiving element 301 receives the RING_DOWN_FLUSH_FDB message termination timing.
List item refresh unit 305 also is used for refreshing the MAC address entries of this transmission node when message receiving element 301 receives the RING_DOWN_FLUSH_FDB message.
The third transmission node structure chart that Fig. 4 provides for the embodiment of the invention, as shown in Figure 4, this transmission node can comprise: fault perception unit 401, message generation unit 402, packet sending unit 403 and list item refresh unit 404.
Fault perception unit 401 is used for the perception ethernet ring network and breaks down.
Message generation unit 402 is used for perceiving in fault perception unit 401 the ethernet ring network back of breaking down and generates the LINK_DOWN message.
Packet sending unit 403 is used to send the LINK_DOWN message of generation.
List item refresh unit 404 is used for perceiving after ethernet ring network breaks down in fault perception unit 401, refreshes the MAC address entries of self.
Fig. 5 is characterized in that this transmission node comprises: fault perception unit 501, message generation unit 502, packet sending unit 503, back off timer 504 and list item refresh unit 505 for the 4th kind of transmission node that the embodiment of the invention provides.
Fault perception unit 501 is used for the perception ethernet ring network and breaks down.
Message generation unit 502 is used for perceiving in fault perception unit 501 the ethernet ring network back of breaking down and generates the LINK_DOWN message.
Packet sending unit 503 is used to send the LINK_DOWN message of generation.
Back off timer 504 is used for starting regularly when packet sending unit 503 sends the LINK_DOWN message.
List item refresh unit 505 is used at the timing length of back off timer 504 then refreshing the MAC address entries of self.
In addition, this transmission node can also comprise: message receiving element 506 is used to receive the RING_DOWN_FLUSH_FDB message.
Back off timer 504 can also be used for when message receiving element 506 receives the RING_DOWN_FLUSH_FDB message termination timing.
List item refresh unit 505 also is used for refreshing the MAC address entries of this transmission node when message receiving element 506 receives the RING_DOWN_FLUSH_FDB message.
Above-mentioned Fig. 2 and transmission node shown in Figure 3 can be used for realizing Fig. 1 transmission node S2, S3 and the function of S6 in embodiment of the invention method, and Fig. 4 and transmission node shown in Figure 5 can be used for realizing Fig. 1 transmission node S4 and the function of S5 in embodiment of the invention method.In addition, each transmission node in the loop can have a kind of and Fig. 4 among Fig. 2 or Fig. 3 or a kind of composition structure among Fig. 5 simultaneously.
By above description as can be seen, method that the embodiment of the invention provides and transmission node are when refreshing MAC address entries and do not rely on the RING_DOWN_FLUSH_FDB message and trigger, even if RING_DOWN_FLUSH_FDB message dropping or host node break down and can't send the RING_DOWN_FLUSH_FDB message, also can determine that looped network breaks down and refresh the MAC address entries of self automatically according to this LINK_DOWN message that receives, and needn't wait for that the MAC address entries natural aging refreshes MAC address entries, can reduce because of transmission node can't in time refresh MAC address entries and cause time of service interruption.
The embodiment of the invention can also be by reporting CPU and the mode that back off timer is set, make transmission node that the time of refreshing MAC address entries can be set as required flexibly, for example, the timing length that back off timer can be set is very of short duration, thereby when looped network breaks down, can refresh MAC address entries immediately, recover the regular traffic of looped network.
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 (11)
1. the method for an Ethernet ring protection is characterized in that, this method comprises:
When looped network breaks down, after generating ring network fault LINK_DOWN message, the transmission node that perceives fault in the ethernet ring network in looped network, sends this LINK_DOWN message;
After other transmission nodes receive this LINK_DOWN message, send this LINK_DOWN message, and determine that according to this LINK_DOWN message looped network breaks down;
When determining that looped network breaks down, described other transmission nodes refresh the media access control MAC list item of self, perhaps, start back off timer when sending described LINK_DOWN message, the timing length of back off timer then, described other transmission nodes refresh the MAC address entries of self.
2. method according to claim 1, it is characterized in that, this method also comprises: when the timing length of described back off timer not then as yet, described other transmission nodes receive looped network and refresh the RING_DOWN_FLUSH_FDB message, then refresh the MAC address entries of self and stop described back off timer.
3. the method for an Ethernet ring protection is characterized in that, this method comprises:
When looped network breaks down, after generating the LINK_DOWN message, the node that perceives fault in the ethernet ring network in looped network, sends this LINK_DOWN message, and refresh the MAC address entries of self, perhaps, when sending described LINK_DOWN message, start back off timer, the timing length of back off timer then refreshes the MAC address entries of self.
4. method according to claim 3, it is characterized in that, this method also comprises: when the timing length of described back off timer not then as yet, described transmission node receives the RING_DOWN_FLUSH_FDB message, then refreshes the MAC address entries of self and stops described back off timer.
5. a transmission node is characterized in that, this transmission node comprises: message receiving element, packet sending unit, fault determining unit and list item refresh unit;
Described message receiving element is used to receive the LINK_DOWN message;
Described packet sending unit is used to send the LINK_DOWN message that described message receiving element receives;
Described fault determining unit is used to utilize described LINK_DOWN message to determine that looped network breaks down, and sends refresh notification to described list item refresh unit;
Described list item refresh unit is used for refreshing the MAC address entries of this transmission node after the refresh notification that receives described fault determining unit transmission.
6. transmission node according to claim 5 is characterized in that, described fault determining unit comprises: message reporting subelement and refresh notification subelement;
Described message reporting subelement, the LINK_DOWN message reporting that is used for described message receiving element is received is given described refresh notification subelement;
Described refresh notification subelement is used for determining that looped network breaks down after receiving described LINK_DOWN message, and sends described refresh notification to described list item refresh unit.
7. a transmission node is characterized in that, this transmission node comprises: message receiving element, packet sending unit, fault determining unit, back off timer and list item refresh unit;
Described message receiving element is used to receive the LINK_DOWN message;
Described packet sending unit is used to send the LINK_DOWN message that described message receiving element receives;
Described fault determining unit is used to utilize described LINK_DOWN message to determine that looped network breaks down, and at described back off timer then, sends refresh notification to described list item refresh unit;
Described back off timer is used for when described packet sending unit sends described LINK_DOWN message, starts regularly;
Described list item refresh unit is used for refreshing the MAC address entries of this transmission node after the refresh notification that receives described fault determining unit transmission.
8. transmission node according to claim 7 is characterized in that, described message receiving element also is used to receive the RING_DOWN_FLUSH_FDB message;
Described back off timer also is used for when described message receiving element receives the RING_DOWN_FLUSH_FDB message termination timing;
Described list item refresh unit also is used for refreshing the MAC address entries of this transmission node when described message receiving element receives the RING_DOWN_FLUSH_FDB message.
9. a transmission node is characterized in that, this transmission node comprises: fault perception unit, message generation unit, packet sending unit and list item refresh unit;
Described fault perception unit is used for the perception ethernet ring network and breaks down;
Described message generation unit is used for perceiving in fault perception unit the ethernet ring network back of breaking down and generates the LINK_DOWN message;
Described packet sending unit is used to send the LINK_DOWN message of described generation;
Described list item refresh unit is used for perceiving after ethernet ring network breaks down in described fault perception unit, refreshes the MAC address entries of self.
10. a transmission node is characterized in that, this transmission node comprises: fault perception unit, message generation unit, packet sending unit, back off timer and list item refresh unit;
Described fault perception unit is used for the perception ethernet ring network and breaks down;
Described message generation unit is used for perceiving in fault perception unit the ethernet ring network back of breaking down and generates the LINK_DOWN message;
Described packet sending unit is used to send the LINK_DOWN message of described generation;
Described back off timer is used for starting when described packet sending unit sends the LINK_DOWN message regularly;
Described list item refresh unit is used at the timing length of described back off timer then refreshing the MAC address entries of self.
11. transmission node according to claim 10 is characterized in that, this transmission node also comprises: the message receiving element is used to receive the RING_DOWN_FLUSH_FDB message;
Described back off timer also is used for when described message receiving element receives the RING_DOWN_FLUSH_FDB message termination timing;
Described list item refresh unit also is used for refreshing the MAC address entries of this transmission node when described message receiving element receives the RING_DOWN_FLUSH_FDB message.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810056536XA CN101217443A (en) | 2008-01-21 | 2008-01-21 | Ethernet loop network protection method and transmission node |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810056536XA CN101217443A (en) | 2008-01-21 | 2008-01-21 | Ethernet loop network protection method and transmission node |
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| CN101217443A true CN101217443A (en) | 2008-07-09 |
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| CNA200810056536XA Pending CN101217443A (en) | 2008-01-21 | 2008-01-21 | Ethernet loop network protection method and transmission node |
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| WO2010012190A1 (en) * | 2008-07-22 | 2010-02-04 | 中兴通讯股份有限公司 | Protection protocol device for network node and method for processing protection switching thereof |
| CN101834772A (en) * | 2009-03-13 | 2010-09-15 | 中兴通讯股份有限公司 | Ethernet ring network-based media access control address sorting method and device |
| WO2011035674A1 (en) * | 2009-09-27 | 2011-03-31 | 迈普通信技术股份有限公司 | Method for accelerating data switching during ethernet ring network failure |
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| WO2011094971A1 (en) * | 2010-02-05 | 2011-08-11 | 中兴通讯股份有限公司 | Method and equipment for preventing repeated refreshing of ethernet ring node address table |
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| CN102111306B (en) * | 2009-12-23 | 2013-06-26 | 杭州华三通信技术有限公司 | Method, system and device for detecting virtual link faults based on fiber channel over Ethernet (FCoE) |
| CN102111306A (en) * | 2009-12-23 | 2011-06-29 | 杭州华三通信技术有限公司 | Method, system and device for detecting virtual link faults based on fiber channel over Ethernet (FCoE) |
| US8948002B2 (en) | 2010-02-05 | 2015-02-03 | Zte Corporation | Method and device for preventing repeated refreshing of address table of Ethernet ring network node |
| KR101402532B1 (en) | 2010-02-05 | 2014-05-30 | 지티이 코포레이션 | Method and equipment for preventing repeated refreshing of ethernet ring node address table |
| WO2011094971A1 (en) * | 2010-02-05 | 2011-08-11 | 中兴通讯股份有限公司 | Method and equipment for preventing repeated refreshing of ethernet ring node address table |
| CN104780104A (en) * | 2015-04-20 | 2015-07-15 | 杭州华三通信技术有限公司 | Packet forwarding method and device in Smart Link networking |
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