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A method and device for transmitting label information

A technology of label information and transmission method, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems of waste of BGPUpdate packets, waste of transmission resources, etc., and achieve the effect of reducing equipment burden and network burden, and reducing the number of transmissions

Active Publication Date: 2016-03-02
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the above implementation mode, the PE device needs to notify the label information of all local VPN instances to the peer PE device through the BGPUpdate message, which will cause waste of the BGPUpdate message; figure 1 As shown, all VPN instances on PE1 are VPN1 (Exportroutetarget is 100:1) and VPN2 (Exportroutetarget is 200:1), and the VPN instance on PE2 is VPN1 (Importroutetarget is 100:1); based on this, as figure 2 As shown, PE1 needs to send the label information of the VPN1 instance and the label information of the VPN2 instance to PE2 respectively through two BGPUpdate messages, and the RT attributes carried in the two BGPUpdate messages are 100:1 and 200:1 respectively; After receiving the two BGPUpdate packets, PE2 will accept the BGPUpdate packet with the RT attribute of 100:1 and discard the RT attribute of 200 by comparing the Importroutetarget (100:1) and the RT attribute carried in the BGPUpdate packet. : 1 BGPUpdate message, obviously, the transmission of the BGPUpdate message whose RT attribute is 200: 1 wastes transmission resources

Method used

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  • A method and device for transmitting label information
  • A method and device for transmitting label information
  • A method and device for transmitting label information

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Embodiment Construction

[0041] Aiming at the problems existing in the prior art, an embodiment of the present invention provides a method for transmitting label information, which is applied to an MPLSL2VPN network including a first PE device and a second PE device that are BGP neighbors to each other (the MPLSL2VPN network can specifically be In the MPLSL2VPN network of Kompella mode), the figure 1 The application scenario shown is an example. The first PE device is PE1, and the second PE device is PE2; or, the first PE device is PE2, and the second PE device is PE1; The device is PE2 as an example for illustration.

[0042] Based on the above application scenarios, such as image 3 As shown, the method includes the following steps:

[0043] Step 301, after the second PE device successfully establishes a BGP neighbor relationship with the first PE device (that is, the BGP neighbor state machine is in the ESTABLISHED (established) state), the second PE device collects the ImportRT attribute informa...

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Abstract

The invention discloses a label information transmission method and equipment. The method includes: a first PE equipment receives an Import? from a second PE equipment. RT attribute information; the first PE device determines that all VPN instances correspond to the Import? The VPN instance of RT attribute information; said first PE device through BGP? The Update message will correspond to the Import? The label information of the VPN instance of the RT attribute information is sent to the second PE device. In the embodiment of the present invention, it is possible to avoid transmitting unnecessary BGP? Update packets, reduce BGP? Number of Update packets transmitted.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and equipment for transmitting label information. Background technique [0002] MPLS (MultiprotocolLabelSwitching, Multiprotocol Label Switching) L2VPN (Layer2VirtualPrivateNetwork, Layer 2 Virtual Private Network) is used to establish Layer 2 connections between different user nodes; based on MPLSL2VPN technology, operators transparently transmit different data on a unified MPLS or IP backbone network Layer 2 data of the link layer enables data link layer services to be transmitted across MPLS or IP backbone networks. Among them, MPLSL2VPN includes VPWS (VirtualPrivateWireService, virtual private office line service) and VPLS (VirtualPrivateLANService, virtual private local area network service). [0003] VPWS is a point-to-point MPLSL2VPN service provided in the public network. From the user's point of view, the MPLS or IP backbone network is a Layer 2 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/723H04L12/947H04L45/50
Inventor 田钧宇
Owner NEW H3C TECH CO LTD