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Method and device for transmitting multicast messages among IPv6 multicast islands

A technology of multicast message and transmission method, applied in the field of communication, can solve problems such as no solution proposed

Inactive Publication Date: 2014-08-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For the above-mentioned problems in related technologies, no effective solution has been proposed yet

Method used

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  • Method and device for transmitting multicast messages among IPv6 multicast islands
  • Method and device for transmitting multicast messages among IPv6 multicast islands
  • Method and device for transmitting multicast messages among IPv6 multicast islands

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Embodiment 1

[0073] figure 1 It is a flowchart of a method for transmitting multicast packets between IPv6 multicast islands according to Embodiment 1 of the present invention. Such as figure 1 As shown, the method includes:

[0074] Step S102, the first edge device obtains the NLRI predefined in BGP dedicated to delivering IPv6 multicast routes, wherein the first edge device is located in the IPv4 network and supports IPv4 and IPv6 dual stacks;

[0075] Step S104, the first edge device notifies the above-mentioned NLRI to the second edge device of the IPv4 network, wherein the second edge device is an edge device in the IPv4 network other than the first edge device;

[0076] Step S106, the first edge device successively establishes the first tunnel and the second tunnel according to the above-mentioned NLRI and the carried tunnel attributes, wherein the first tunnel is used to cross the IPv4 network between IPv6 multicast islands to realize the interaction of multicast signaling, and th...

Embodiment 2

[0123] The technical problem to be solved in this embodiment is to provide a method for a non-VPN IPv6 multicast island to traverse an IPv4 MPLS network, so that a non-VPN IPv6 multicast island can traverse an IPv4 network to realize intercommunication of multicast services. The application scenarios are as follows: image 3 shown. To solve this problem, the present invention proposes the concept of IPv6 multicast service provider edge 6MPE (IPv6 Multicast ProviderEdge) technology.

[0124] In order to realize the 6MPE technology, the present embodiment provides a method for non-VPN IPv6 multicast islands to traverse the IPv4 MPLS network: newly define a kind of Network Layer Reachability Information (NLRI) in MP_REACH_NLRI of BGP: MCAST-IPv6 NLRI, as IPv6 The specific extension type of multicast is used to automatically discover IPv6 multicast islands, and generate and advertise IPv6 multicast routes on the side of IPv6 islands, such as Figure 4 Shown: address family identi...

Embodiment 3

[0175] Figure 14 The scenario shown is one of typical intra-domain application scenarios. The public network tunnel established based on mLDP P2MP LSP implements IPv6 multicast islands to traverse the IPv4 MPLS network in the same AS domain to realize multicast interworking, and the RP configured with multicast V6 islands is on PE1 On the control plane, the main process includes the following steps:

[0176] Step 1: Configure IGP / LDP / MLDP / MPBGP on all connected devices PE1 / PE2 / PE3, and enable MCAST-IPv6 capability under the BGP protocol. If the two-two negotiation is successful, the IBGP neighbor has the ability to transmit IPv6 multicast routes; at the same time, PE1 Configure the exclusive Router-id belonging to the present invention on / PE2 / PE3 respectively, and notify the route corresponding to the Router-id in the IGP, so that the routes between the Router-ids are reachable;

[0177] Step 2: Enable PIM on the V6 interface directly connected to PE1 and CE1, enable PIM on...

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Abstract

The invention provides a method and device for transmitting multicast messages among IPv6 multicast islands. The method comprises the following steps that a first edge device obtains NLRI specially used for transmitting IPv6 multicast routes, wherein the first edge device is located in an IPv4 network and supports dual stacks; the first edge device announces the NLRI to a second edge device in the IPv4 network except for the first edge device; according to the NLRI and carried tunnel attributes, the first edge device establishes a first tunnel and a second tunnel in sequence, wherein the first tunnel is used for achieving interaction of multicast signals among the IPv6 multicast islands across the IPv4 network, and the second tunnel is used for achieving interaction of multicast data among the IPv6 multicast islands across the IPv4 network; the first edge device receives IPv6 multicast data transmitted by the second edge device through the second tunnel and forwards the IPv6 multicast data to a client. By the adoption of the method and device for transmitting the multicast messages among the IPv6 multicast islands, intercommunication of IPv6 multicast services is conducted among the IPv6 multicast islands across the intermediate IPv4 network.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and device for transmitting multicast messages between IPv6 multicast islands. Background technique [0002] In IP networks, IPv4 addresses are exhausted, and the deployment of IPv6 networks is imminent, and various transition technologies from IPv4 to IPv6 networks are developing rapidly. Unicast transition technologies include: IPv6 Rapid Deployment (6RD for short), Dual-Stack Lite (DS-lite for short), Mapping of Address and Port (MAP for short), IPv6 Service Provider Edge (IPv6 Provider Edge, referred to as 6PE), IPv6 VPN Service Provider Edge (Virtual Private Network Extension for IPv6 VPN, referred to as 6vPE), etc., covering the transition scenario of whether the public network is an IP network or an MPLS network; Multicast transition technologies include: DS-lite Multicast, Auto Multicast Tunnel (Auto Multicast Tunnel, AMT for short), Mesh Multicast, etc. L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04L12/761H04L12/749H04L45/16H04L45/741
Inventor 王翠尹邢飞孟伟
Owner ZTE CORP
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