Updating method, equipment and system of forwarding table during service transmission of Ethernet

An update method and forwarding table technology, applied in the field of communication, can solve problems such as failure to send packets, increase network bandwidth consumption, and long delay in updating MAC address forwarding table items, so as to avoid packet flooding, improve update efficiency, The effect of saving bandwidth

Inactive Publication Date: 2009-11-18
深圳市智通天下科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to packet flooding during the self-learning process, a large number of redundant packets will be generated in the core network, increasing the consumption of network bandwidth
In addition, in the aging mechanism, the update delay of MAC address forwarding entries is long, which may cause the packets within a long period of time to fail to be sent to the correct PE device in the new topology, but to the PE device in the old topology.

Method used

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  • Updating method, equipment and system of forwarding table during service transmission of Ethernet
  • Updating method, equipment and system of forwarding table during service transmission of Ethernet
  • Updating method, equipment and system of forwarding table during service transmission of Ethernet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] This embodiment provides a method for updating the forwarding table in Ethernet service transmission, see image 3 Provided is a schematic diagram of the networking structure, where PW1 and PW2 are the main PW and the backup PW respectively. In this embodiment, the image 3 In case of PW1 failure, the switch from PW1 to PW2 is used as an example to illustrate, because the switch from PW1 to PW2 does not cause the local PE device to change, and the local PE device is PE1 before and after the switch, so this embodiment adopts the MAC address forwarding table switch method to update the MAC address forwarding table, see Figure 4 , the update method of the MAC address forwarding table includes:

[0068] Step 101: PE1 and PE3 switch from PW1 to PW2 after detecting that PW1 fails, that is, stop using PW1 and activate PW2;

[0069] Step 102: PE1 and PE3 determine that the local PE device has not changed before and after the PW switching, and update PW1 in their own MAC addr...

Embodiment 2

[0079] This embodiment provides a method for updating the forwarding table in Ethernet service transmission, see Figure 5 Provided is a schematic diagram of the network structure, in which PE3 and PE4 are the main PE equipment and the backup PE equipment respectively, PW1 and PW2 are the main PW and the backup PW respectively, and PE1 is connected to PE3 and PE4 respectively through PW1 and PW2. Figure 5If PW1 fails, switch from PW1 to PW2 as an example. According to whether the local PE device changes before and after the PW switchover, PE1 needs to switch the MAC address forwarding table, and PE3 needs to migrate the MAC address forwarding table. See Figure 6 , the following briefly describes how to update the MAC address forwarding table in this networking scenario:

[0080] Step 201: PE1 updates the MAC address forwarding table according to the switching method of the MAC address forwarding table provided in Embodiment 1, which will not be described in detail here;

[...

Embodiment 3

[0093] This embodiment provides a method for updating the forwarding table in Ethernet service transmission, see Figure 8 Schematic diagram of the network structure provided, in which the functions of PE1, PE2, PW1, and PW2 are the same as Figure 6 In the same way, this embodiment takes Figure 8 If PE1 in the network fails, switch from PW1 to PW2 as an example. The methods for updating the MAC address forwarding table include:

[0094] After PE2 and PE3 detect that PE1 fails, they switch PW1 to PW2, that is, PE2 activates PW2, and PE3 migrates the forwarding table;

[0095] Among them, PE3 will complete the update of the MAC address forwarding table on PE4 according to the migration operation of the MAC address forwarding table provided in Embodiment 2, which will not be described in detail here;

[0096] After PE2 activates PW2, it can directly use its pre-saved MAC address forwarding table to forward packets. When PE1 is working normally, it will periodically migrate it...

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Abstract

The embodiment of the invention discloses an updating method, equipment and a system of a forwarding table during the service transmission of an Ethernet, belonging to the field of communication. The updating method comprises the following steps: when a host link is switched into a standby link, the PE equipment of the standby link updates a port corresponding to the host link in an MAC address forwarding table into a port corresponding to the standby link. The embodiment of the invention also provides an operator edge device comprising a fault processing module and a forwarding table updatingmodule or comprising a judging module and a processing module. The system comprises a main operator edge device and a standby operator edge device. When the host link is switched into the standby link, the PE equipment of the standby link updates the port corresponding to the host link in the MAC address forwarding table into the port corresponding to the standby link, therefore, the embodiment of the invention prevents an MAC address from being recovered, a relearning process and the grouping flooding caused by the relearning process and reduces the influence on network services.

Description

technical field [0001] The invention relates to the communication field, in particular to a method, device and system for updating an Ethernet service transfer transfer table. Background technique [0002] Ethernet is currently the most widely deployed LAN technology, but it has some limitations, such as limited address space of VLAN (Virtual Local Area Network, virtual local area network), limited scalability of Spanning Tree Protocol, and difficult aggregation of MAC (Media Access Control, Media Access Control) addresses. and other defects. [0003] In order to break through the limitations of Ethernet switching, people have developed several emerging technologies that can provide Ethernet multipoint connection services. One is VPLS (Virtual PrivateLAN Service, virtual Private LAN service) technology, which can connect multiple sites together through an emulated Ethernet broadcast domain supported by the provider's IP / MPLS (Multi-protocol Label Switching, Multi-protocol L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L1/22
CPCH04L45/04H04L45/021H04L45/68H04L45/22H04L45/028H04L45/28H04L45/00
Inventor 江元龙
Owner 深圳市智通天下科技服务有限公司
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