Method and device for controlling message forwarding

A technology for controlling messages and devices, applied in the field of communication, can solve problems such as not being able to automatically support forwarding requirements

Inactive Publication Date: 2008-07-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The inventor found in the process of realizing the present invention: because the proposal of the isolation of the access side in the two-layer network is relatively new, no standard has been formed yet, and the forwarding engine of the two-layer network equipment generally adopts ASIC (Application Specific Integrated Circuits, Application-specific integrated circuit) non-programmable and modified chips are completed, and this requirement is not considered during design, so it cannot automatically support the forwarding requirements of the above-mentioned access side isolation

Method used

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  • Method and device for controlling message forwarding

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Experimental program
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Embodiment 1

[0026] The embodiment of the present invention provides a method for controlling message forwarding, which is illustrated by taking the network diagram of VPLS message forwarding equipment provided in Figure 2 as an example. Isolation, that is, not allowing the devices on the access side to forward messages to each other, the method provided by the embodiment of the present invention can support the access side without changing the forwarding engine of the packet forwarding device in the existing Layer 2 network. Isolation to achieve successful forwarding of packets. Referring to Fig. 3, it is a flowchart of a method for controlling message forwarding provided by an embodiment of the present invention, and the specific contents include:

[0027] 101: Divide the Layer 2 network with access-side isolation enabled into two broadcast domains: broadcast domain A and broadcast domain B, where broadcast domain A includes all public network-side interfaces 1, 2, 3 and access Side int...

Embodiment 2

[0059] The method for controlling message forwarding provided by Embodiment 1 of the present invention can be further optimized. In this embodiment, by aiming at the corresponding relationship generated before the MAC table item mapping in Embodiment 1, the MAC table item generated according to the corresponding relationship is set. The interface in the MAC entry is a black hole interface, which effectively avoids the problem of continuously reporting MAC learning messages because the source MAC address cannot be found in the MAC forwarding table.

[0060] In this embodiment, the situation of receiving packets from the interface on the public network side and the interface on the access side will be described in detail respectively. The details are as follows:

[0061] 1) When the message forwarding device receives a forwarded message to be forwarded to interface 1 through other interfaces on the public network side, for example, the destination MAC address of the forwarded mes...

Embodiment 3

[0073] Those skilled in the art know that when performing Layer 2 network maintenance, manual configuration of a static MAC is often used to avoid broadcast forwarding during MAC learning, or forwarding packets to an interface whose destination MAC address is not within its range. Therefore, in this embodiment, entries (broadcast domain identifier, MAC address and corresponding interface) corresponding to static MAC addresses configured by the network management or manually may also be saved in the MAC forwarding table of broadcast domain A and / or B. Usually, static MAC addresses are configured for a special purpose, that is, when a packet hits the entry, the packet is forwarded to the interface corresponding to the entry, so as to achieve the special purpose of packet forwarding. Through the way of statically configuring the MAC address, it can be realized that the devices on the access sides can communicate with each other when the access side isolation is enabled.

[0074] ...

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Abstract

The invention discloses a method and a device for forwarding control message and belongs to communication filed. The method comprises: dividing a first broadcast domain and a second broadcast domain; preserving marks of the first broadcast domain at all the interfaces of the public network side while preserving marks of the second broadcast domain at all the interfaces of the accessing side; receiving the forwarding message, studying the source medium access control address of the forwarding message and obtaining the corresponding relationship of the source medium access control address, the receiving interface and the broadcast domain mark and mapping the broadcast domain mark of the corresponding relationship and finally getting the corresponding source medium access control address forwarding item after mapping. The device consists of: a division module, a reservation module, a receiving module and a mapping module. By dividing broadcast domain and mapping broadcast domain mark, the invention does not have to modify the forwarding engine chip of the existing message forwarding device and satisfies the requirements of accessing side isolation in the two-layer network and realizes successful message forwarding.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for controlling message forwarding. Background technique [0002] In a two-layer network, the working principle of a two-layer device such as a message forwarding device is: according to the destination MAC (Media Access Control, Media Access Control) address carried in the received message, look up the MAC forwarding table of the device itself, and pass The outbound interface corresponding to the matched MAC entry forwards the packet. The message forwarding device receives the message and forwards the message. When the corresponding relationship between the destination MAC address and the interface has not been recorded on the message forwarding device (that is, the destination MAC address has not been learned), it will send the message to Broadcast on all interfaces of the device itself except the receiving interface (which can be a physical interface or a logical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/66
CPCH04L51/214
Inventor 唐湜
Owner HUAWEI TECH CO LTD
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