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System, equipment and method for forwarding message

A technology for forwarding messages and devices, applied in the field of communication, can solve the problems of wasting outbound interfaces, demanding networking requirements, and inability to encapsulate, etc., and achieve the effect of improving flexibility

Inactive Publication Date: 2014-05-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1) In the existing technology, the processing of the PE on the access side is relatively simple, but the PE on the opposite end needs to know the networking mode of the connected switch or other devices accurately to encapsulate the Vlan Tag for the data packet; and for the PE, an outbound The interface can only have one fixed encapsulation form. If data packets need to be encapsulated in different encapsulation forms, they need to be encapsulated from different outbound interfaces of the PE. If there are many devices or Vlan Tag encapsulation forms attached to the PE, it will waste many outgoing interfaces
[0009] 2) In prior art 2, because the access-side PE retains all the multi-layer Vlan Tags encapsulated in the data message, after receiving the data message, the peer PE will forward the data message to the CEs in the same VLAN, so the implementation method of prior art 2 requires CEs at both ends to belong to the same VLAN, which has strict requirements on networking and cannot be flexibly encapsulated according to the situation of the target CE

Method used

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  • System, equipment and method for forwarding message
  • System, equipment and method for forwarding message

Examples

Experimental program
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Embodiment 1

[0040]In the prior art, the PW only has two transmission modes of Raw and Tag. In this embodiment, the Tag transmission mode of the PW is extended by extending the attributes of the PW, and the Raw mode is still the same as the prior art. There are multiple PWs on one PE. After defining the tag mode as a flexible custom mode, the PE can select different PWs according to different CEs, that is, refine the tag transmission mode of the PW. After receiving the packet, the PE decapsulates the packet according to the configured tag mode. For example, TagUnchange indicates that the current virtual LAN tag (Vlan Tag) of the packet does not change after the PE decapsulates it, and Tag1 indicates that the decapsulated packet carries a layer of Vlan Tags in a specified order (the specified order can be specified from inside to outside). Tag2 indicates that the decapsulated message carries the first two layers of Vlan Tags in the specified order (that is, QINQ encapsulation), ..., Tag n i...

Embodiment 2

[0062] see Figure 4 , the embodiment of the present invention provides a device for forwarding messages, the device includes:

[0063] The search module is used to find the corresponding virtual link according to the interface receiving the data message after receiving the data message;

[0064] The decapsulation module is configured to decapsulate the data message according to the configuration mode of the virtual link found by the search module, and the decapsulated data message carries a virtual local area network label corresponding to the configuration mode of the virtual link.

[0065] Further, the above decapsulation module can be specifically used to decapsulate the data message when the configuration mode of the virtual link found by the search module is label 0, and the virtual local area network label carried by the decapsulated data message is empty;

[0066] Or the decapsulation module can be specifically used to decapsulate the data message when the configurati...

Embodiment 3

[0071] see Figure 5 , the embodiment of the present invention provides a system for forwarding messages, the system includes:

[0072] The provider edge device is used to find the corresponding virtual link according to the interface receiving the data message after receiving the data message, decapsulate the data message according to the configuration mode of the virtual link, and decapsulate the data message Carry the virtual LAN label corresponding to the configuration mode of the virtual link, and forward the decapsulated data message through the virtual link;

[0073] The peer provider edge device is used to find the corresponding interface according to the virtual link after receiving the decapsulated data message, and transparently transmit the received data message through the found interface.

[0074] Further, the above-mentioned provider edge device may specifically include:

[0075] The search module is used to find the corresponding virtual link according to the...

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PUM

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Abstract

A method, device and system for forwarding packet is disclosed, which belongs to the communication field. The method includes that: a PE(Provider Edge device) receives a data packet, and finds out a corresponding PW(Pseudo Wire) according to the interface which receives the date packet; the PE de-encapsulates the said data packet according to the PW's configuration mode, which makes the de-encapsulated data packet include a VLAN tag corresponding to the PW's configuration mode; the PE forwards the de-encapsulated data packet through the PW. The device includes a look-up module and a de-encapsulating module. The system includes a PE and a opposite PE. The present invention improves the flexibility of forwarding packet, by the way of extending the PW's configuration mode.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for forwarding messages. Background technique [0002] VPLS (Virtual Private LAN Service, virtual private LAN service) or PWE3 (Pseudo Wire Emulation Edge-to-Edge, point-to-point virtual link) belong to the two-layer transparent transmission protocol, and the user equipment needs to transmit with the remote equipment Data is transparently transmitted through PW (Pseudo Wire, virtual link), because one PE (Provider Edge device, provider edge device) can access multiple different CE (Customer Edge device, customer edge device) , so the data packets from the CE end to the PE access side have various Vlan Tag encapsulation conditions. [0003] see figure 1 , CE1 connects to PE1 through switches S2 and S1 through PWE3 or VPLS. When CE1’s data packet reaches switch S2, S2 converts the packet according to the VLAN (Virtual Local Area Network, Virtual Local...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/723H04L12/46H04L45/50
CPCH04L45/04H04L2212/0025H04L45/68H04L2212/00
Inventor 李新向友斌
Owner HUAWEI TECH CO LTD