CN101783769A - Method and device for forwarding message during failure of link - Google Patents
Method and device for forwarding message during failure of link Download PDFInfo
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- CN101783769A CN101783769A CN201010124959A CN201010124959A CN101783769A CN 101783769 A CN101783769 A CN 101783769A CN 201010124959 A CN201010124959 A CN 201010124959A CN 201010124959 A CN201010124959 A CN 201010124959A CN 101783769 A CN101783769 A CN 101783769A
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Abstract
The invention discloses a method and a device for forwarding a message during failure of a link. The method comprises that: when the link with other equipment is failed, the device updates a VLAN ID corresponding to a port of the failed link in a VLAN attribute table; the updated VLAN ID has no corresponding table entry in a forwarding database table; the device acquires a corresponding VLAN ID in the VLAN attribute table according to an input port of the received message, and a forwarding table entry in the forwarding database table is forwarded according to the matching of the VLAN ID with a destination MAC address of the message; if the matching is successful, the device forwards the message according to a corresponding output port; and if the matching is failed, the device broadcasts the message in the VLAN to which the input port of the message belongs. In the invention, the quick link switching is realized through the attribute field of the VLAN table.
Description
Technical field
The present invention relates to the communications field, the method and apparatus that message is transmitted when relating in particular to a kind of link failure.
Background technology
STP (Spanning Tree Protocol, Spanning-Tree Protocol) basic principle is, by determining topology of networks transmitting a kind of special protocol massages (this protocol massages is called as " configuration messages " in IEEE 802.1D) between the switch, comprised enough information in the configuration messages and guaranteed that switch is finished and generate tree calculating.The basic thought of STP generates " one tree " exactly, and the root of tree is a switch that is called the root bridge, and according to difference is set, different exchange opportunities is chosen as the root bridge, but can only there be a root bridge any time.Begin by the root bridge, form one tree step by step, root bridge timed sending configuration message, nonroot bridge receives configuration message and transmits, if certain switch can receive configuration message from plural port, then illustrating from this switch to root has a more than paths, just constituted circulation circuit, switch was selected a port according to configuring ports and other port block, was eliminated circulation this moment.When the path failure of port on the switch and root bridge, switch can be set up and being connected of root bridge by another port, and promptly STP switches.
In the double layer network of introducing VLAN (Visual Local Area Network, VLAN), STP switches the MAC Address that the main problem that will solve is the study of deletion faulty link, carries out the Mac address learning on the link again switching.STP networking as shown in Figure 1, can constitute loop with No. 3 links and be connected by No. 1 link, No. 2 links between A equipment, B equipment and the C equipment, for fear of loop occurring, No. 1 link is set to Block (obstruction) state, No. 2 lines and No. 3 lines and is in connected state, and the flow between the equipment is by No. 2 links and No. 3 link transmission.Port Port_A_1 and port Port_C_1 do not learn MAC Address, port Port_A_2 and port Port_C_2 study MAC Address.When A equipment receives the message of upstream equipment, target MAC (Media Access Control) address and Vlan ID (Identification according to message, sign) searches FDB (the Forwarding Data Base of storage, forwarding database) table, obtain target MAC (Media Access Control) address and Vlan ID corresponding output port Port_A_2 with message, E-Packet by Port_A_2.
At this moment, if No. 2 circuit Down, A equipment and C equipment need be transmitted the message of receiving with Line 1 road UP by the Line 1 road.In this case, the flow on the A equipment is no longer transmitted according to the MAC Address of port Port_A_2 study, the flow on the B equipment is no longer gone up the MAC Address of learning according to port Port_B_2 and is transmitted.
In the prior art, A equipment and B equipment are searched FDB table separately respectively, and deletion Port_A_2 and Port_B_2 go up the MAC Address of study.For example, when message arrives A equipment, A equipment is searched the FDB table, discovery does not have corresponding message forwarding-table item, then A equipment is broadcasted this message in the Vlan under the message inbound port, thereby message is transmitted by Port_A_1, and carried out MAC address learning by Port_A_1, subsequent packet is directly known by Port_A_1 and is transmitted by searching FDB table.
In the process of the MAC Address of on deletion Port_A_2 and Port_B_2, learning, A equipment and B equipment still E-Packet according to the FDB table, if it is the target MAC (Media Access Control) address of message that Port_A_2 and Port_B_2 go up the MAC Address of study, the target MAC (Media Access Control) address that is last this message learnt of Port_A_2 and Port_B_2 is not deleted as yet, then message is still transmitted by Port_A_2 and Port_B_2, causes message retransmission failure or packet loss.Therefore, the fast more flow migration of the deletion of the MAC Address on port Port_A_2 and the port Port_C_2 is fast more.
But under existing a lot of situations, the deletion speed of MAC Address is very slow, especially can't realize deleting in batches the situation of MAC Address for forwarding chip (for example NP chip), because the speed of MAC Address deletion is slow excessively, will seriously reduce the speed that STP switches.
Summary of the invention
The method and apparatus that message is transmitted when the invention provides a kind of link failure is with the link switchover of quick realization equipment.
The method that message is transmitted when the invention provides a kind of link failure, after message forwarding equipment obtains message, search the forwarding database table according to the purpose medium access control MAC Address of the VLAN ID VLAN ID of message inbound port and message and obtain corresponding output port and carry out message and transmit, this method comprises:
During with the link failure of other equipment, described equipment upgrades the VLAN ID of faulty link port correspondence in the VLAN attribute list; VLAN ID after the renewal does not have corresponding list item in the forwarding database table;
Described equipment obtains corresponding VLAN ID according to the inbound port of the message that receives in the VLAN attribute list, according to the forwarding-table item in the target MAC (Media Access Control) address coupling forwarding database table of this VLAN ID and message;
If the match is successful, described equipment E-Packets according to corresponding output port;
If it fails to match, described equipment broadcasting packet in the VLAN under the inbound port of message.
Described equipment upgrades before the VLAN ID of faulty link port correspondence in the VLAN attribute list, also comprises: described equipment is provided with VALN Table Properties field in the VLAN attribute list;
Described equipment upgrades faulty link port correspondence in the VLAN attribute list VLAN ID comprises: described equipment is updated to 1 with the VALN Table Properties field of described faulty link port correspondence by 0.
The position of described VALN Table Properties field in the VLAN attribute list is first of VLAN id field.
Described equipment upgrades after the VLAN ID of faulty link port correspondence in the VLAN attribute list, also comprises:
The MAC Address that the described faulty link port of described unit deletion is learnt;
After deletion finished, described equipment reduced the VLAN ID of described faulty link port correspondence in the VLAN attribute list.
The equipment that message is transmitted when the invention provides a kind of link failure after this equipment obtains message, is searched the forwarding database table according to the target MAC (Media Access Control) address of the VLAN ID of message inbound port and message and is obtained corresponding output port and carry out message and transmit, and this equipment comprises:
Updating block when being used for the link failure of described equipment and other equipment, upgrades the VLAN ID of faulty link port correspondence in the VLAN attribute list; VLAN ID after the renewal does not have corresponding list item in the forwarding database table;
Receiving element is used to receive the message that sends to described equipment;
Search the unit, be connected, be used for searching described VLAN attribute list and obtain corresponding VLAN ID according to the inbound port of message with described receiving element;
Matching unit is connected with the described unit of searching, and is used for according to the VLAN ID of message inbound port and the corresponding forwarding-table item of target MAC (Media Access Control) address coupling of message;
Retransmission unit is connected with described matching unit, when being used for described matching unit the match is successful, E-Packets according to corresponding output port; Described matching unit is when it fails to match, broadcasting packet in the VLAN under the inbound port of described message.
Also comprise: dispensing unit, be connected with described updating block, be used for VALN Table Properties field being set at the VLAN attribute list;
Described updating block also is used for: the VALN Table Properties field of faulty link port correspondence is updated to 1 by 0.
The position of described VALN Table Properties field in the VLAN attribute list is first of VLAN id field.
Also comprise:
Delete cells is connected with described updating block, is used to delete the MAC Address that described faulty link port is learnt;
Described updating block also is used for: after the deletion of MAC Address that described delete cells is learnt described faulty link port finishes, and the VLAN ID of the described faulty link port correspondence of reduction in the VLAN attribute list.
Compared with prior art, the present invention has the following advantages at least:
When link failure takes place, upgrade the VLAN ID of faulty link port correspondence, equipment is by the forwarding-table item failure in this VLANID and the message target MAC (Media Access Control) address coupling forwarding database table, broadcasting packet in the VLAN under the faulty link port, thus can when taking place, realize link failure link switchover fast.
Description of drawings
Fig. 1 is that a kind of STP switches the networking schematic diagram in the prior art;
The schematic flow sheet of the method that message was transmitted when Fig. 2 was a link failure provided by the invention;
Fig. 3 is the structural representation of application scenarios of the present invention;
Fig. 4 be application scenarios of the present invention provide link failure the time message method transmitted schematic flow sheet;
The structural representation of the equipment that message was transmitted when Fig. 5 was a link failure provided by the invention.
Embodiment
Core concept of the present invention is: VALN Table Properties field is set in the VLAN of equipment attribute list, when link failure takes place, this attribute field is set to 1, search the FDB table when message is transmitted and hit failure, with the faulty link port under broadcasting packet in the VLAN; And the MAC Address of faulty link port correspondence in the deletion FDB table, after deletion finishes, the VALN Table Properties field in the reduction VLAN attribute list.
The method that message is transmitted when the invention provides a kind of link failure, after message forwarding equipment obtains message, searching the forwarding database table according to the purpose medium access control MAC Address of the VLAN ID VLAN ID of message inbound port and message obtains corresponding output port and carries out message and transmit, as shown in Figure 2, this method comprises:
The method that message is transmitted when introducing link failure provided by the invention in detail below in conjunction with concrete application scenarios.
As shown in Figure 3, comprise equipment 1-3 in this application scenarios, equipment 1 comprises port one-5, at the corresponding VLAN1 of VLAN attribute list middle port 1-3, port 4,5 corresponding VLAN2, the MAC Address that the corresponding port 1-3 of VLAN1 learns in the forwarding database table, the MAC Address that the corresponding port 4,5 of VLAN2 is learnt.Under the normal condition, transmit to equipment 2 by port 3 by the message of port one access arrangement 1, during link failure between this port 3 and the equipment 2, need switch to port 2 by equipment 3 again to equipment 2 forwardings.
When message was transmitted, equipment need obtain the VLAN ID of message inbound port in the VLAN attribute list, according to the target MAC (Media Access Control) address of this VLAN ID and message, obtains corresponding output port and E-Packet in the forwarding database table.Vlan ID scope is 1～4094, and field is 12BIT, and the MAC Address amount is very big, and field adopts 6 Byte, and is as shown in table 1:
Table 1
In the application scenarios of the present invention, in the VLAN attribute list, increase VALN Table Properties field, as shown in table 2:
Table 2
Under normal circumstances, VALN Table Properties field S is 0, and when link failure took place, VALN Table Properties field S was set to 1, and therefore, at forwarding database table can not find corresponding list item because the value of VLAN ID surpasses 4094 this moment, and equipment is broadcasting packet in VLAN.
Concrete, as shown in Figure 4, this method may further comprise the steps:
Concrete, as shown in table 2, the position of VALN Table Properties field in the VLAN attribute list is first of the shared 2byte of VLAN id field, under the normal condition, VALN Table Properties field is 0; When needing link switchover, VALN Table Properties field is set to 1.
Concrete, if equipment receives message by port 4, because the corresponding VLAN of the VLAN of port 4 correspondences and port 3 is different, therefore, equipment obtains normal VLAN ID, further searches the FDB table according to this VLAN ID and message target MAC (Media Access Control) address and obtains corresponding output port and carry out message and transmit.
If equipment receives message by port one, it is 1 VLAN ID that equipment obtains VALN Table Properties field, and this VLAN ID surpasses 4094, and equipment can't find corresponding forwarding-table item with the message target MAC (Media Access Control) address according to this VLAN ID in FDB shows.
In conjunction with shown in Figure 3, the message that equipment receives by port 2 and 3 Broadcast Ports 1, because port 3 respective links faults, message is transmitted to equipment 2 by port 2.
After the deletion of MAC Address that equipment was learnt port 3 originally finished, equipment was reduced to 0 with the VALN Table Properties field of port 3 correspondences, and equipment can match the message that receives by port one corresponding output port and transmits transmitting tables of data then.
For example, during STP shown in Fig. 1 switched, during No. 2 line faults between A equipment and the B equipment, after the A device discovery carried out the message retransmission failure by PORT_A_2, the VALN Table Properties field S in the VLAN attribute list corresponding with PORT_A_2 was set to 1.At this moment, the message that equipment receives can't obtain normal VLAN ID, thereby can't from the FDB table, obtain corresponding port, equipment is broadcasted message under the message inbound port in the VLAN, be to send message among Fig. 1 by PORT_A_1, carry out mac learning by PORT_A_1, and deletion is by the MAC Address of the original study of PORT_A_2, after deletion finishes the VALN Table Properties field S in the VLAN attribute list is reduced to 0, can normally E-Packets then by searching FDB table acquisition corresponding output port PORT_A_1.
By the method that adopts application scenarios of the present invention to provide, when link failure takes place, upgrade the VLAN ID of faulty link port correspondence, equipment is by the forwarding-table item failure in this VLAN ID and the message target MAC (Media Access Control) address coupling forwarding database table, broadcasting packet in the VLAN under the faulty link port, thus can when taking place, realize link failure link switchover fast.
The equipment that message is transmitted when the invention provides a kind of link failure, after this equipment obtains message, search the forwarding database table according to the target MAC (Media Access Control) address of the VLAN ID of message inbound port and message and obtain corresponding output port and carry out message and transmit, as shown in Figure 5, this equipment comprises:
Updating block 11 when being used for the link failure of described equipment and other equipment, upgrades the VLAN ID of faulty link port correspondence in the VLAN attribute list; VLAN ID after the renewal does not have corresponding list item in the forwarding database table;
Receiving element 12 is used to receive the message that sends to described equipment;
Also comprise: dispensing unit 16, be connected with described updating block 11, be used for VALN Table Properties field being set at the VLAN attribute list;
Described updating block 11 also is used for: the VALN Table Properties field of faulty link port correspondence is updated to 1 by 0.
The position of described VALN Table Properties field in the VLAN attribute list is first of VLAN id field.
Also comprise:
Described updating block 11 also is used for: after the deletion of MAC Address that described delete cells is learnt described faulty link port finishes, and the VLAN ID of the described faulty link port correspondence of reduction in the VLAN attribute list.
By the equipment that adopts application scenarios of the present invention to provide, when link failure takes place, upgrade the VLAN ID of faulty link port correspondence, equipment is by the forwarding-table item failure in this VLAN ID and the message target MAC (Media Access Control) address coupling forwarding database table, broadcasting packet in the VLAN under the faulty link port, thus can when taking place, realize link failure link switchover fast.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (8)
1. the method that message is transmitted during a link failure, after message forwarding equipment obtains message, searching the forwarding database table according to the purpose medium access control MAC Address of the VLAN ID VLAN ID of message inbound port and message obtains corresponding output port and carries out message and transmit, it is characterized in that this method comprises:
During with the link failure of other equipment, described equipment upgrades the VLAN ID of faulty link port correspondence in the VLAN attribute list; VLAN ID after the renewal does not have corresponding list item in the forwarding database table;
Described equipment obtains corresponding VLAN ID according to the inbound port of the message that receives in the VLAN attribute list, according to the forwarding-table item in the target MAC (Media Access Control) address coupling forwarding database table of this VLAN ID and message;
If the match is successful, described equipment E-Packets according to corresponding output port;
If it fails to match, described equipment broadcasting packet in the VLAN under the inbound port of message.
2. the method for claim 1 is characterized in that,
Described equipment upgrades before the VLAN ID of faulty link port correspondence in the VLAN attribute list, also comprises: described equipment is provided with VALN Table Properties field in the VLAN attribute list;
Described equipment upgrades faulty link port correspondence in the VLAN attribute list VLAN ID comprises: described equipment is updated to 1 with the VALN Table Properties field of described faulty link port correspondence by 0.
3. method as claimed in claim 2 is characterized in that, the position of described VALN Table Properties field in the VLAN attribute list is first of VLAN id field.
4. the method for claim 1 is characterized in that, described equipment upgrades after the VLAN ID of faulty link port correspondence in the VLAN attribute list, also comprises:
The MAC Address that the described faulty link port of described unit deletion is learnt;
After deletion finished, described equipment reduced the VLAN ID of described faulty link port correspondence in the VLAN attribute list.
5. the equipment that message is transmitted during a link failure after this equipment obtains message, is searched the forwarding database table according to the target MAC (Media Access Control) address of the VLAN ID of message inbound port and message and is obtained corresponding output port and carry out message and transmit, and it is characterized in that this equipment comprises:
Updating block when being used for the link failure of described equipment and other equipment, upgrades the VLAN ID of faulty link port correspondence in the VLAN attribute list; VLAN ID after the renewal does not have corresponding list item in the forwarding database table;
Receiving element is used to receive the message that sends to described equipment;
Search the unit, be connected, be used for searching described VLAN attribute list and obtain corresponding VLAN ID according to the inbound port of message with described receiving element;
Matching unit is connected with the described unit of searching, and is used for according to the VLAN ID of message inbound port and the corresponding forwarding-table item of target MAC (Media Access Control) address coupling of message;
Retransmission unit is connected with described matching unit, when being used for described matching unit the match is successful, E-Packets according to corresponding output port; Described matching unit is when it fails to match, broadcasting packet in the VLAN under the inbound port of described message.
6. equipment as claimed in claim 5 is characterized in that,
Also comprise: dispensing unit, be connected with described updating block, be used for VALN Table Properties field being set at the VLAN attribute list;
Described updating block also is used for: the VALN Table Properties field of faulty link port correspondence is updated to 1 by 0.
7. equipment as claimed in claim 6 is characterized in that, the position of described VALN Table Properties field in the VLAN attribute list is first of VLAN id field.
8. equipment as claimed in claim 5 is characterized in that, also comprises:
Delete cells is connected with described updating block, is used to delete the MAC Address that described faulty link port is learnt;
Described updating block also is used for: after the deletion of MAC Address that described delete cells is learnt described faulty link port finishes, and the VLAN ID of the described faulty link port correspondence of reduction in the VLAN attribute list.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010124959A CN101783769A (en) | 2010-03-16 | 2010-03-16 | Method and device for forwarding message during failure of link |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010124959A CN101783769A (en) | 2010-03-16 | 2010-03-16 | Method and device for forwarding message during failure of link |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291288A (en) * | 2011-08-08 | 2011-12-21 | 杭州华三通信技术有限公司 | Rapid ring protection protocol (RRPP)-ring-based traffic switching method and device |
| CN102420768A (en) * | 2011-12-15 | 2012-04-18 | 北京星网锐捷网络技术有限公司 | Link switching method and device, data transmission method and device, and network equipment |
| CN102437967A (en) * | 2012-02-01 | 2012-05-02 | 杭州华三通信技术有限公司 | Method and device for forwarding messages |
| CN103795633A (en) * | 2012-10-31 | 2014-05-14 | 中兴通讯股份有限公司 | Layer-2 forwarding method and forwarding equipment |
| US9762532B2 (en) | 2013-08-14 | 2017-09-12 | Coriant Oy | Method and network device for configuring a data transfer network |
| CN111010673A (en) * | 2018-10-08 | 2020-04-14 | 华为技术有限公司 | Communication method and device |
| CN111884922A (en) * | 2020-07-21 | 2020-11-03 | 芯河半导体科技(无锡)有限公司 | Local forwarding system for cross-device link aggregation |
-
2010
- 2010-03-16 CN CN201010124959A patent/CN101783769A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291288A (en) * | 2011-08-08 | 2011-12-21 | 杭州华三通信技术有限公司 | Rapid ring protection protocol (RRPP)-ring-based traffic switching method and device |
| CN102420768A (en) * | 2011-12-15 | 2012-04-18 | 北京星网锐捷网络技术有限公司 | Link switching method and device, data transmission method and device, and network equipment |
| CN102437967A (en) * | 2012-02-01 | 2012-05-02 | 杭州华三通信技术有限公司 | Method and device for forwarding messages |
| CN102437967B (en) * | 2012-02-01 | 2015-01-28 | 杭州华三通信技术有限公司 | Method and device for forwarding messages |
| CN103795633A (en) * | 2012-10-31 | 2014-05-14 | 中兴通讯股份有限公司 | Layer-2 forwarding method and forwarding equipment |
| CN103795633B (en) * | 2012-10-31 | 2017-05-31 | 中兴通讯股份有限公司 | A kind of layer 2 forwarding method and forwarding unit |
| US9762532B2 (en) | 2013-08-14 | 2017-09-12 | Coriant Oy | Method and network device for configuring a data transfer network |
| CN111010673A (en) * | 2018-10-08 | 2020-04-14 | 华为技术有限公司 | Communication method and device |
| WO2020073752A1 (en) * | 2018-10-08 | 2020-04-16 | 华为技术有限公司 | Communication method and device |
| CN111010673B (en) * | 2018-10-08 | 2021-05-11 | 华为技术有限公司 | Communication method and device |
| US11963242B2 (en) | 2018-10-08 | 2024-04-16 | Huawei Technologies Co., Ltd. | Communication method and apparatus |
| CN111884922A (en) * | 2020-07-21 | 2020-11-03 | 芯河半导体科技(无锡)有限公司 | Local forwarding system for cross-device link aggregation |
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Application publication date: 20100721 |