distribution method, asbr, pe and distribution system

An allocation method and allocation configuration technology, which is applied in the field of network communication, can solve the problems of high ASBR pressure, large memory usage of forwarding table items, and the number of labels is easy to exceed the scale, so as to achieve accurate allocation, relieve pressure, and reduce the number of labels.

Active Publication Date: 2019-06-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the MP-EBGP network, all the private network routes of the local domain and other domains must be maintained on the ASBR, and the ASBR must assign a label to each VPNv4 route. As the number of labels on ASBR increases, the number of labels on ASBR can easily exceed the scale, and forwarding table entries will occupy a large amount of memory. Adding or deleting VPNv4 routes needs to be broadcast to each forwarding board, which increases the burden on the ASBR system.

Method used

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  • distribution method, asbr, pe and distribution system
  • distribution method, asbr, pe and distribution system
  • distribution method, asbr, pe and distribution system

Examples

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no. 1 example

[0035] figure 2 The flow chart of the VPN routing label allocation method provided by the first embodiment of the present invention is composed of figure 2 It can be seen that in this embodiment, the embodiment of the VPN routing label distribution method provided by the present invention on the ASBR includes the following steps:

[0036] S201: Receive a VPN routing update message;

[0037] S202: Determine whether to assign a label to the new VPN route according to the VPN route update message;

[0038] Specifically, step S202 may specifically detect whether the VPN route update message carries the public network edge device PE identifier, and the public network edge device PE identifier is the identity identifier of the source public network edge device PE of the new VPN route; if not carried, it is The new VPN route is assigned a label; if the VPN route update message carries the PE identifier of the public network edge device, extract the PE identifier of the public net...

no. 2 example

[0067] Combine now image 3 and Figure 4The present invention is further illustrated by specific application examples, image 3 It is a flow chart of the VPN routing label allocation method provided in the second embodiment of the present invention, Figure 4 It is a schematic diagram of the VPN network and the routing label in the second embodiment of the present invention. This embodiment takes the MP-EBGP networking mode as an example for illustration. Then, the VPN routing label distribution system involved in the present invention mainly includes PE and ASBR. In this embodiment, it is assumed that the VPN2 network already includes route A, wherein ASBR1, ASBR2, and PE2 have assigned labels 300, 200, and 100 to route A, respectively. Specifically, such as image 3 As shown, in this embodiment, the VPN routing label distribution method provided by the present invention includes the following steps:

[0068] S301: When PE2 detects that a new VPN route is added in the vi...

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Abstract

The invention provides a VPN route label distribution method, ASBR, PE and a distribution system, the method comprising: receiving a VPN route update message; judging whether to assign a label for a new VPN route according to the VPN route update message; if necessary, assigning a new VPN route Label. Through the implementation of the present invention, after receiving the VPN route update message, it is first judged whether a label needs to be allocated for the new VPN route, and only when necessary, the label is allocated, which is different from the prior art after receiving the VPN route update message. Compared with assigning labels for VPN routes, the number of labels for VPN routes can be reduced, which relieves the pressure on ASBRs.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a virtual private network VPN routing label distribution method, ASBR, PE and a distribution system. Background technique [0002] The private private network built using the public network is called a virtual private network (VPN, Virtual Private Network). Sites belonging to a VPN may be connected to different PEs. In order to ensure the connectivity of the VPN, we must exchange VPNs between PEs. routing information. In networking applications, multiple Sites of user VPNs may be connected to different AS (Application Server, Application Server) domains of multiple ISPs (Internet Service Providers, Internet Service Providers). This application method is called cross-domain VPN. [0003] Cross-domain VPN to solve the problem that LSP (Label Switched Path, Label Switched Path) cannot cross domains, the key lies in the configuration of ASBR (Autonomous System Boundy Router, Au...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/723H04L12/46H04L45/50
CPCH04L12/46
Inventor 刘准宋兵付琰韩杰
Owner ZTE CORP
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