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Multicast forwarding method and device as well as network device

A technology of a forwarding device and a forwarding method, applied in the field of network communication, can solve the problems of wasting VPN and MT resources, reduce effective VPN and MT resources, etc., and achieve the effect of saving VPN and tunnel resources.

Active Publication Date: 2012-07-11
BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the number of VPN and MT supported by each device is limited, which will reduce the effective VPN and MT resources, resulting in a waste of VPN and MT resources

Method used

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  • Multicast forwarding method and device as well as network device
  • Multicast forwarding method and device as well as network device
  • Multicast forwarding method and device as well as network device

Examples

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Embodiment Construction

[0025] image 3 It is a flowchart of a multicast forwarding method provided by an embodiment of the present invention. Such as image 3 As shown, the method of the present embodiment includes:

[0026] Step 301, the first PE in the first VPN receives the private network multicast message sent by the multicast source in the first VPN, the destination address of the private network multicast message is the private network multicast address of the second VPN .

[0027] Wherein, when a user in the second VPN needs to access the multicast service provided by the multicast source in the first VPN, it will send a multicast request to the multicast source in the first VPN. The multicast source in the first VPN will provide services to users in the second VPN according to the multicast request. Specifically, the private network multicast packet sent by the multicast source in the first VPN may be forwarded to the first PE in the first VPN through the CE in the first VPN.

[0028] ...

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PUM

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Abstract

The invention provides a multicast forwarding method and a device as well as a network device. The method comprises the following steps: a first PE (Provider Edge) in a first VPN (Virtual Private Network) receives a private network multicast message transmitted by a multicast source in the first VPN; the first PE encapsulates the private network multicast message according to a public network multicast address of MD (Multicast Domain) that the second PE belongs to in the second VPN configured under the MVRF (Multicast Virtual Routing and Forwarding) of the first PE to generate a public network multicast message whose destination address is the public network multicast address of the MD that the second PE belongs to, and transmits the public network multicast message to the second PE so that the second PE restores the public network multicast message into the private network multicast message and then transmits to the second VPN. The technical proposal of the invention ensures that the amount of MT (Multicast Tunnel) established between the VPN and the PE configured on the PE is reduced during VPN multicast spanning, and the resources of VPN and MT are saved.

Description

technical field [0001] The invention relates to network communication technology, in particular to a multicast forwarding method, device and network equipment. Background technique [0002] Multiprotocol Label Switching (MPLS) is a protocol that no longer uses the traditional routing table for data forwarding, but determines the forwarding behavior by looking up the label in the message. A multicast virtual private network (Virtual Private Network, VPN) is a layer-3 (L3) MPLS VPN network based on a border gateway protocol (Border Gateway Protocol, BGP) technology for disseminating multicast data within a VPN. Wherein, the multicast-domain (Multicast-Domain, MD) is a scheme for realizing the multicast VPN, that is, the MD VPN scheme. Each VPN corresponds to an MD, and the MD covers all Provider Edge Routers (Provider Edge Routers, PEs) within the VPN that can exchange multicast data. In the MD VPN solution, the MD is regarded as the public network, while the outside of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04L12/46H04L12/56H04L29/12H04L45/16
Inventor 张明振
Owner BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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