CN102281166A - Transmission control method and device in Ethernet link - Google Patents
Transmission control method and device in Ethernet link Download PDFInfo
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- CN102281166A CN102281166A CN2010102019752A CN201010201975A CN102281166A CN 102281166 A CN102281166 A CN 102281166A CN 2010102019752 A CN2010102019752 A CN 2010102019752A CN 201010201975 A CN201010201975 A CN 201010201975A CN 102281166 A CN102281166 A CN 102281166A
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Abstract
The invention discloses a transmission control method and device in an Ethernet link, which are used for realizing Ethernet link transmission and reducing the possibility of link interrupt. The method comprises the following steps: a first node determines an aggregation group, corresponding to a destination address, of a local according to the destination address of an information frame to be transmitted; the first node selects a port with a link connection in the aggregation group; and the first node transmits the information frame through the selected port. The invention also discloses the device for realizing the method.
Description
Technical field
The present invention relates to the computer and the communications field, particularly relate to transfer control method and device in the Ethernet link.
Background technology
Ethernet has developed into the local area network technology that is most widely used.Ethernet link comprises bus-type link, star topology link and ring-network topology link etc.Ring topology is the most succinct redundant topological structure that possesses, and has advantages such as control simple and flexible and saving number of links.
Be example with 6 nodes in the prior art, node 1 connected node 2, node 2 connected nodes 3, by that analogy, final node 6 connected nodes 1 constitute loop network link.The transmission course of loop network link is: node 1 sends to node 6 by node 2-5 with broadcasting packet, and node 6 sends to node 1 with this broadcasting packet again.After node 1 was received the broadcasting packet of node 6 transmissions, because the destination address in the broadcasting packet is special destination address, node 1 can be transmitted to broadcasting packet node 2 again according to special destination address, and so circulation will cause broadcast storm.
For fear of broadcast storm, node 1 sealing self inserts a port of looped network, and for example the port one of node 1 and port 2 insert looped network, and port 2 is blocked.Node 1 sends Frame by port one to node 2, and node 2 sends to node 6 by node 3-5 with Frame.Because node 1 blocks port 2, so node 6 can't send to Frame node 1, thereby has avoided broadcast storm.
But the mode of this port blocked makes looped network become linear network, and node 1 has only a link to node 6.Promptly have only a pair of port to connect on this link between adjacent two nodes, when this connected interruption, this link also can interrupt.This scheme causes the frequent interruption of link easily, influences transfer of data.
Summary of the invention
The embodiment of the invention provides transfer control method and device in a kind of Ethernet link, is used to realize the ethernet ring network link transmission, and reduces the probability that interruption takes place link.
Transfer control method in a kind of Ethernet link may further comprise the steps:
Destination address in the information frame that first node sends is as required determined the local aggregation group corresponding with this destination address;
In the first node selective polymerization group link-attached port is arranged;
First node sends information frame by the port of selecting.
Equipment in a kind of Ethernet link comprises:
Port is used to send information frame;
Control module, the destination address of the information frame that is used for sending are as required determined the local aggregation group corresponding with this destination address, and link-attached port is arranged in the selective polymerization group, and the port that indication is selected sends information frame.
The embodiment of the invention adopts flowcollector aggregation scheme FlowCollector to make up the ethernet ring network link, and the destination address in the information frame that node sends is as required determined the local aggregation group corresponding with this destination address, and is to determine and this destination address corresponding port in the prior art.Aggregation group can comprise one or more ports.The link down of a port in aggregation group, and other port is when still having link to connect, this aggregation group link corresponding is not interrupted, and the embodiment of the invention selects to have link-attached port to send information frame, has guaranteed link transmission.And the link down between any two ports in the prior art, then whole piece link down.As seen, the embodiment of the invention realizes the ethernet ring network link transmission, and reduces the probability that interruption takes place link.
Description of drawings
Fig. 1 is the structure chart of equipment in the embodiment of the invention;
Fig. 2-Fig. 4 is the schematic diagram of loop network link in the embodiment of the invention;
Fig. 5 is the method flow diagram of transmission control in the embodiment of the invention;
Fig. 6 is the transmission method flow chart under the normal state in the embodiment of the invention;
Fig. 7 is a fault detection method flow chart in the embodiment of the invention;
Fig. 8 is a fault recovery method flow chart in the embodiment of the invention.
Embodiment
The embodiment of the invention adopts flowcollector aggregation scheme FlowCollector to make up the ethernet ring network link, and the destination address in the information frame that node sends is as required determined the local aggregation group corresponding with this destination address, and is to determine and this destination address corresponding port in the prior art.Aggregation group can comprise one or more ports.The link down of a port in aggregation group, and other port is when still having link to connect, this aggregation group link corresponding is not interrupted, and the embodiment of the invention selects to have link-attached port to send information frame, has guaranteed link transmission.And the link down between any two ports in the prior art, then whole piece link down.As seen, the embodiment of the invention realizes the ethernet ring network link transmission, and reduces the probability that interruption takes place link.
Referring to Fig. 1, the equipment in the present embodiment in the Ethernet link comprises: port one 01 and control module 102.This equipment can be specially switch, router or personal computer (PC) etc.
Port one 01 is used to send information frame.Port one 01 can have a plurality of.Information frame is Frame or ether automatic protection switching (EAPS) control frame, and the EAPS control frame comprises that detecting health-check control frame, link down link down control frame, loop interrupts refreshing the RING-DOWN-FLUSH-FDB control frame and be connected with loop and refresh RING-UP-FLUSH-FDB control frame etc.
When described equipment was host node in the loop network link, this equipment was having an aggregation group under normal (normal) attitude, and this aggregation group comprises first sets of ports and second sets of ports.First sets of ports and second sets of ports all can comprise one or more port ones 01, and one of them port one 01 can only belong to a sets of ports.Port one 01 in the aggregation group all inserts loop network link.In data transmission procedure, control module 102 is that the port that first Frame is selected is first port of first port, and be that the port that second Frame is selected is second port of second port, and send the first information frame and second information frame respectively by first port and second port.The left side link that is equivalent to the corresponding host node of first sets of ports, the right side link of the corresponding host node of second sets of ports.A host node can pass through two link transmission data frames, includes only the scheme of a link with respect to looped network in the prior art, has increased substantially the network bandwidth.At a Frame, control module 102 also can from about select physical distance or the nearest link of route distance to come transferring data frames two links, be not subjected to the restriction of a transmission link of the prior art, improved efficiency of transmission.
Host node need detect loop network link, then control module 102 generates the health-check control frame, and periodically send the health-check control frame to loop network link by port one 01, promptly send the health-check control frame to miscellaneous equipment (promptly from node).Health-check control frame of control module 102 every transmissions starts one time the poll timer.The health-check control frame can be got back to the port of second port of host node transmit a circle in loop network link after, and this port is transmitted to control module 102 with the health-check control frame.Referring to shown in Figure 2, be example with 6 node SW1～SW6, SW1 is a host node, other node is from node.First sets of ports of SW1 (among Fig. 2 with a circle 1 shown in) with first aggregation group of SW6 (among Fig. 2 with two circles 1 shown in) be connected, as long as there is a pair of port that link is arranged between the two, be connected with first aggregation group of SW6 just can determine first sets of ports of SW1; Second aggregation group of SW6 is connected with first aggregation group of SW5, and by that analogy, first aggregation group of last SW2 is connected with second sets of ports of SW1.Other sets of ports of SW1～SW6 (as third and fourth sets of ports) does not insert looped network, does not therefore participate in the transmission of control frame.Control module 102 sends first aggregation group of health-check control frame to SW6 by first sets of ports; First aggregation group of SW6 is transmitted to the health-check control frame second aggregation group of self; Second aggregation group of SW6 sends first aggregation group of health-check control frame to SW5, and by that analogy, first aggregation group of last SW2 sends second sets of ports of health-check control frame to SW1.Because SW1 has only an aggregation group, can not transmit to other port one 01 of this locality again.One takes turns transmission back control module 102 before the poll timer expiry receives the health-check control frame, represents that then loop network link is normal, to the zero clearing of poll timer, when the next cycle arrives, sends the health-check control frame once more.Control module 102 is determined the loop network link fault at the poll timer expiry and when not receiving the health-check control frame, then transits to loop fault (RING-FAULT) attitude from normal state.At this moment, it is first aggregation group and second aggregation group that control module 102 also is used for polymeric component, and first sets of ports and second sets of ports belong to first aggregation group and second aggregation group respectively, and first aggregation group is main aggregation group.Concrete, control module 102 is with the sign of the source aggregation group sign as first aggregation group, be that second aggregation group is created a sign again, set up the corresponding relation of the sign of the sign of the first port all of the port and first aggregation group then, and the corresponding relation of setting up the sign of the sign of the second port all of the port and second aggregation group.
Because host node has been in the RING-FAULT attitude, shows that loop network link interrupts, need to upgrade link, then control module 102 also is used for sending the RING-DOWN-FLUSH-FDB control frame by the port of first aggregation group and second aggregation group.Referring to shown in Figure 3, two links sent the RING-DOWN-FLUSH-FDB control frame about SW1 passed through, so that all nodes on the looped network all can be received this control frame.SW1 and all receive that the node of RING-DOWN-FLUSH-FDB control frame refreshes layer 2 (L2) table (this table is used to write down routing iinformation, as the corresponding relation of destination address and aggregation group sign) separately.
Two repetitive operations that Link Down control frame causes for fear of the same link down trigger; and the ping-pong operation of avoiding link failure and recovery; after control module 102 transits to the RING-FAULT attitude; start timer 1 immediately; before timer 1 is overtime, do not handle any ether automatic protection switching (EAPS) control frame.The time-out time of timer 1 can be the system design protection switch time.
When control module 102 also is used to transit to normal state, start timer 1 immediately, before timer 1 is overtime, do not handle any ether automatic protection switching (EAPS) control frame, and to the zero clearing of poll timer.
When described equipment be in the loop network link from node the time, should comprise first aggregation group and second aggregation group from aggregation group of node.When normal transmission, control module 102 receives information frame by the port in first aggregation group; If this information frame is the information frame that needs forwarding, determine local second aggregation group corresponding according to the destination address in the information frame, and from second aggregation group, select to have link-attached port with this destination address, send information frame by this port.When detecting link down, control module 102 transits to the RING-FAULT attitude from the normal attitude, and refreshes L2 table according to the RING-DOWN-FLUSH-FDB control frame of receiving, promptly upgrades the corresponding relation that destination address and aggregation group identify in the L2 table.For example, referring to shown in Figure 3, refresh L2 table before, SW4 receives information frame from the right side link, and sends from the left side link; After refreshing L2 table, SW4 is from the left side link frame that sends and receives information.
When detecting link-recovery, control module 102 transits to preparation (PRE-FORWARDING) attitude from the RING-FAULT attitude.When being in the PRE-FORWARDING attitude, its port has the function that receives and transmit the health-check control frame, can not handle other frame from node.Therefore, after control module 102 transits to the PRE-FORWARDING attitude, aggregation group by broken link not receives the health-check control frame, and the health-check control frame is transmitted to other node by the aggregation group of fault recovery, so that host node returns to the normal attitude after receiving the health-check control frame.For example, referring to shown in Figure 4, behind the link-recovery between second aggregation group of SW4 and second aggregation group of SW3, first aggregation group of SW4 sends to second aggregation group of SW3 with the health-check control frame by second aggregation group of SW4, and second aggregation group of SW3 sends to the health-check control frame through SW2 second aggregation group of SW1 again by self first aggregation group.Second aggregation group of SW1 is transmitted the health-check control frame and is given first aggregation group (main aggregation group), and first aggregation group of SW1 is transmitted the health-check control frame and given local control module 102.After receiving the RING-UP-FLUSH-FDB control frame from the control module 102 of node, transit to the normal attitude, and refresh the L2 table from the PRE-FORWARDING attitude.For example, referring to shown in Figure 4, refresh L2 table after, SW4 continues to receive information frame from the right side link, and sends from the left side link.
Owing to have link-recovery mechanism in the present embodiment, thus host node when the RING-FAULT attitude, can dynamically add or delete in the loop network link from node, interpolation also be in the RING-FAULT attitude from node.
All timers in the present embodiment include in control module 102.
Equipment in the present embodiment can be host node, also can be from node.Host node and constitute an Ethernet ring network system from node.Which equipment is as host node in the preset configuration Ethernet ring network system, and the later stage can be changed host node by modes such as maintenances.
Understood the internal structure and the function of equipment in the ethernet ring network by above description, the transmission control procedures to ethernet ring network are introduced below.
Referring to Fig. 5, in the present embodiment in the ethernet ring network the main flow process of transfer control method as follows:
Step 501: the destination address in the information frame that first node sends is as required determined the local aggregation group corresponding with this destination address.
Step 502: in the first node selective polymerization group link-attached port is arranged.
Step 503: first node sends information frame by the port of selecting.
Transmission control procedures comprise transmission course, process fault detection and the failover procedure under the normal state.Introduce the realization of each process in detail below by three embodiment.
Referring to Fig. 6, the transmission method flow process in the present embodiment under the normal state is as follows:
Step 601: the destination address in the information frame that host node sends is as required determined the local aggregation group corresponding with this destination address.Because host node has only an aggregation group, can omit this step.
Step 602: the definite data volume that needs the data of transmission of host node.
Step 603: host node is selected link-attached port according to data volume from aggregation group.The mode of selecting has multiple, as selecting the port that link connects and load is the lightest is arranged; Perhaps select have link to connect and the port of available bandwidth maximum; Perhaps selecting has link-attached a plurality of port, each port bearing part data, and a plurality of ports are realized the transmission of total data jointly; Other selection mode can also be arranged, from link-attached port is arranged, select the mode of port all to be applicable to present embodiment arbitrarily.
For example, host node is respectively selected a port from first sets of ports and second port.Continue step 604 and 605.
Step 604: host node is by the port transmission partial data of first port.
Step 605: host node is by the port transmission remainder data of second port.This step can be carried out synchronously with step 604.
In the present embodiment host node can be simultaneously from about two link transmission datas, improved the utilance of link, be equivalent to improve transmission bandwidth.
Referring to Fig. 7, the fault detection method flow process is as follows in the present embodiment:
Step 701: host node from first sets of ports (being the master port collection) send the health-check control frame to adjacent from node.The detailed process that sends the health-check control frame can be referring to flow process shown in Figure 5.
Transmit the health-check control frame successively from node.
Step 702: host node starts the poll timer.Perhaps with the zero clearing of poll timer.This step can be carried out synchronously with step 701. Step 703 and 704 is continued in step 702 back.
Step 703: host node is received the health-check control frame, determines that link is normal.Zero clearing poll timer, and when arriving next cycle, continue step 701.This cycle is controlled by cycle timer.
Step 704: poll timer expiry, host node are not received the health-check control frame yet, determine that link is unusual.Perhaps, host node continues following step after receiving link down control frame.Host node zero clearing poll timer, perhaps zero clearing poll timer again when send the health-check control frame next time.
Step 705: host node transits to the RING-FAULT attitude from the normal attitude.
Step 706: host node starts timer 1.
Step 707: host node is first aggregation group (main aggregation group) and second aggregation group with polymeric component.
Step 708: host node sends the RING-DOWN-FLUSH-FDB control frame by first aggregation group and second aggregation group.
Transmit the RING-DOWN-FLUSH-FDB control frame successively from node, and transit to the RING-FAULT attitude from the normal attitude.
Step 709: host node refreshes the L2 table.
Wherein, step 705-707 and 709 all is processes of relative opposition, and 4 steps can be carried out synchronously.
Step 710: that receives the RING-DOWN-FLUSH-FDB control frame refreshes the L2 table from node.
Host node continues periodically to send the health-check control frame under the RING-FAULT attitude, so that detect fault recovery.
Referring to Fig. 8, the fault recovery method flow process is as follows in the present embodiment:
Step 801: host node cycle from first aggregation group (promptly main aggregation group) send the health-check control frame to adjacent from node.The detailed process that sends the health-check control frame can be referring to flow process shown in Figure 5.
Transmit the health-check control frame successively from node.Wherein the node of the both link ends of Zhong Duaning also can't be transmitted the health-check control frame, up to link-recovery.
Step 802: malfunctioning node (node of the both link ends of interruption) detects faulty link and recovers.
Step 803: malfunctioning node transits to the PRE-FORWARDING attitude from the RING-FAULT attitude.
Step 804: malfunctioning node is transmitted the health-check control frame.
Step 805: host node receives the health-check control frame.
Step 806: host node transits to the normal attitude from the RING-FAULT attitude.
Step 807: host node starts timer 1.
Step 808: host node is with the zero clearing of poll timer.
Step 809: host node sends the RING-UP-FLUSH-FDB control frame by first aggregation group and second aggregation group.
Transmit the RING-UP-FLUSH-FDB control frame successively from node, and transit to the normal attitude from the RING-FAULT attitude.Malfunctioning node transits to the normal attitude from the PRE-FORWARDING attitude.
Wherein, step 806-809 all is relatively independent processes, and 4 steps can be carried out synchronously.
Step 810: host node is an aggregation group with first aggregation group and the merging of second aggregation group.Perhaps, step 809 is exchanged with step 810, and promptly host node is an aggregation group with first aggregation group and the merging of second aggregation group earlier, sends the RING-UP-FLUSH-FDB control frame by the aggregation group after merging then.
Be used to realize that the software of the embodiment of the invention can be stored in storage mediums such as floppy disk, hard disk, CD and flash memory.
The embodiment of the invention adopts flowcollector aggregation scheme FlowCollector to make up the ethernet ring network link, and the destination address in the information frame that node sends is as required determined the local aggregation group corresponding with this destination address, and is to determine and this destination address corresponding port in the prior art.Aggregation group can comprise one or more ports.The link down of a port in aggregation group, and other port is when still having link to connect, this aggregation group link corresponding is not interrupted, and the embodiment of the invention selects to have link-attached port to send information frame, has guaranteed link transmission.And the link down between any two ports in the prior art, then whole piece link down.As seen, the embodiment of the invention realizes the ethernet ring network link transmission, and reduces the probability that interruption takes place link.The embodiment of the invention is because port blocked not, so two link transmission information frames about host node can pass through have improved the utilance of link, and improved transmission bandwidth.The embodiment of the invention also provides the fault detect and the recovery mechanism of ethernet ring network, has guaranteed the transmission of ethernet ring network link.And the node when allowing link failure in dynamic interpolation and the deletion loop network link.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (20)
1. transfer control method in the Ethernet link is characterized in that, may further comprise the steps:
Destination address in the information frame that first node sends is as required determined the local aggregation group corresponding with this destination address;
In the first node selective polymerization group link-attached port is arranged;
First node sends information frame by the port of selecting.
2. the method for claim 1 is characterized in that, the aggregation group of first node comprises first sets of ports and is different from second sets of ports of first sets of ports; The information frame that needs to send comprises first information frame and second information frame that is different from first information frame; The port that first node is selected for first information frame is first port of first port, and is that the port that second information frame is selected is second port of second port;
First node comprises by the step that the port of selecting sends information frame: first node sends the first information frame and second information frame respectively by first port and second port.
3. the method for claim 1 is characterized in that, information frame is for detecting the health-check control frame; First node comprises by the step that the port of selecting sends information frame: first node sends the health-check control frame by the port of selecting under normal state; First node sends the health-check control frame by the port of selecting under normal state after, described method also comprises step: first node transits to the loop fault attitude at the poll timer expiry and when not receiving the health-check control frame from normal state; Perhaps
Described method also comprises step: first node transits to the loop fault attitude from normal state receive link down control frame under normal state after.
4. method as claimed in claim 3 is characterized in that, the aggregation group of first node comprises first sets of ports and is different from second sets of ports of first sets of ports; First node also comprises step after transitting to the loop fault attitude from normal state:, first sets of ports and second sets of ports belong to first aggregation group and second aggregation group respectively.
5. method as claimed in claim 4, it is characterized in that, after first node was first aggregation group and second aggregation group with polymeric component, described method also comprised step: first node sends the RING-DOWN-FLUSH-FDB control frame by the port in first aggregation group and second aggregation group.
6. the method for claim 1 is characterized in that, information frame is the health-check control frame; First node is in the loop fault attitude; Aggregation group comprises first aggregation group and second aggregation group;
Destination address in the information frame that first node sends as required determines that the step of the aggregation group that this locality is corresponding with this destination address comprises: the destination address in the health-check control frame that first node sends is as required determined local first aggregation group corresponding with this destination address.
7. method as claimed in claim 6, it is characterized in that, after first node sends the health-check control frame by the port of selecting, described method also comprises step: first node is adjourned normal state from the loop fault attitude and is jumped when receiving the health-check control frame by the port in first aggregation group.
8. method as claimed in claim 7 is characterized in that, first node is adjourned after normal state jumps from the loop fault attitude, also comprises step: it is an aggregation group that first node merges first aggregation group and second aggregation group.
9. the method for claim 1 is characterized in that, first node comprises first aggregation group and second aggregation group;
Destination address in the information frame that first node sends as required determines that described method also comprises step before the local aggregation group corresponding with this destination address: first node receives information frame by the port in first aggregation group;
Destination address in the information frame that first node sends as required determines that the step of the aggregation group that this locality is corresponding with this destination address comprises: the destination address in the information frame that first node sends is as required determined local second aggregation group corresponding with this destination address.
10. the method for claim 1, it is characterized in that information frame is for detecting health-check control frame, link down link down control frame, loop interruption refreshing RING-DOWN-FLUSH-FDB control frame or loop connection refreshing RING-UP-FLUSH-FDB control frame.
11. the equipment in the Ethernet link is characterized in that, comprising:
Port is used to send information frame;
Control module, the destination address of the information frame that is used for sending are as required determined the local aggregation group corresponding with this destination address, and link-attached port is arranged in the selective polymerization group, and the port that indication is selected sends information frame.
12. equipment as claimed in claim 11 is characterized in that, port is a plurality of; Aggregation group comprises first sets of ports and is different from second sets of ports of first sets of ports; The information frame that needs to send comprises first information frame and second information frame that is different from first information frame; The port that control module is selected for first information frame is first port of first port, and is that the port that second information frame is selected is second port of second port;
Control module sends the first information frame and second information frame respectively by first port and second port.
13. equipment as claimed in claim 11 is characterized in that, information frame is for detecting the health-check control frame; Control module also is used to be under the normal state at the poll timer expiry and when not receiving the health-check control frame, transits to the loop fault attitude from normal state; Perhaps
Control module also be used to be in receive link down control frame under the normal state after, transit to the loop fault attitude from normal state.
14. equipment as claimed in claim 13 is characterized in that, aggregation group comprises first sets of ports and is different from second sets of ports of first sets of ports; It is first aggregation group and second aggregation group that control module also is used for polymeric component, and first sets of ports and second sets of ports belong to first aggregation group and second aggregation group respectively.
15. equipment as claimed in claim 14 is characterized in that, control module also is used for sending the RING-DOWN-FLUSH-FDB control frame by the port of first aggregation group and second aggregation group.
16. equipment as claimed in claim 11 is characterized in that, information frame is the health-check control frame; First node is in the loop fault attitude; Aggregation group comprises first aggregation group and second aggregation group;
Destination address in the health-check control frame that control module sends is as required determined local first aggregation group corresponding with this destination address.
17. equipment as claimed in claim 16 is characterized in that, control module also is used for adjourning normal state from the loop fault attitude and jumping when receiving the health-check control frame by the port of first aggregation group.
18. equipment as claimed in claim 17 is characterized in that, it is an aggregation group that control module also is used for first aggregation group and the merging of second aggregation group.
19. equipment as claimed in claim 11 is characterized in that, first node comprises first aggregation group and second aggregation group;
Control module also is used for receiving information frame by the port of first aggregation group; And the destination address in the information frame that sends is as required determined local second aggregation group corresponding with this destination address.
20. equipment as claimed in claim 11, it is characterized in that information frame is for detecting health-check control frame, link down link down control frame, loop interruption refreshing RING-DOWN-FLUSH-FDB control frame or loop connection refreshing RING-UP-FLUSH-FDB control frame.
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| CN201010201975.2A CN102281166B (en) | 2010-06-10 | 2010-06-10 | Transmission control method and device in Ethernet link |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101035050A (en) * | 2007-03-15 | 2007-09-12 | 中兴通讯股份有限公司 | Processing method of the virtual LAN aggregation |
| CN101170512A (en) * | 2007-11-21 | 2008-04-30 | 中兴通讯股份有限公司 | Message service processing method |
| CN101534234A (en) * | 2009-04-20 | 2009-09-16 | 杭州华三通信技术有限公司 | Interworking Ethernet ring network protection method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101035050A (en) * | 2007-03-15 | 2007-09-12 | 中兴通讯股份有限公司 | Processing method of the virtual LAN aggregation |
| CN101170512A (en) * | 2007-11-21 | 2008-04-30 | 中兴通讯股份有限公司 | Message service processing method |
| CN101534234A (en) * | 2009-04-20 | 2009-09-16 | 杭州华三通信技术有限公司 | Interworking Ethernet ring network protection method and system |
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