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Method and device for selecting a rendezvous point rp for a multicast group

A multicast group and aggregation point technology, applied in the field of network communication, can solve the problems of heavy load of multicast traffic, increase of C-RP1 traffic forwarding burden, discarding, etc.

Active Publication Date: 2019-06-14
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because all PIM routers in the PIM-SM domain use the same rules to select RPs for multicast group IP addresses, this will result in the selection of the same RP for multiple multicast groups, so there will be a problem: if a C-RP (denoted as C-RP1) has been selected as the RP of multicast group 1 and multicast group 2. At this time, C-RP1 simply forwards multicast traffic for multicast group 1 and multicast group 2. The RP selected as multicast group 3 is responsible for forwarding the multicast traffic of multicast group 3, which will increase the traffic forwarding burden of C-RP1, which may cause traffic congestion and be discarded, and also cause other C-RPs to lose less than fully utilized

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  • Method and device for selecting a rendezvous point rp for a multicast group

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[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] see figure 1 , figure 1 The flow chart of the method provided by the present invention. This procedure applies to a network where multiple C-RPs exist in a PIM-SM domain.

[0045] Such as figure 1 As shown, the process may include the following steps:

[0046] Step 101, each C-RP in the PIM domain detects the bandwidth usage of the incoming interface in each local multicast (S, G) table entry, and when detecting the bandwidth usage of the incoming interface in at least one multicast (S, G) table entry When the used bandwidth exceeds the preset bandwidth threshold, determine the bandwidth usage of this C-RP as the first case, when it is detected that the used bandwidth of the incoming interface in any multicast (S, G) entry does not exce...

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Abstract

This application provides a method and device for selecting a rendezvous point RP for a multicast group. In the present invention, when the PIM router in the PIM-SM domain selects the corresponding RP for the multicast group IP address, the C-RP whose used bandwidth exceeds the preset bandwidth threshold no longer participates in the selection, which can make other C-RPs (already The use of bandwidth lower than the preset bandwidth threshold) increases the chance of selecting the corresponding RP for the IP address of the multicast group, so as to achieve the purpose of selecting the RP for the multicast group in a load sharing manner and realize the purpose of load sharing among C-RPs.

Description

technical field [0001] The present application relates to network communication technology, in particular to a method and device for selecting a rendezvous point (RP: RendezvousPoint) for a multicast group. Background technique [0002] A Protocol Independent Multicast (PIM: Protocol Independent Multicast) protocol or the like needs to be used in service applications such as video-on-demand and teleconferencing. The PIM protocol can be divided into Protocol Independent Multicast-Dense Mode (PIM-DM: Protocol Independent Multicast-Dense Mode) and Protocol Independent Multicast-Sparse Mode (PIM-SM: Protocol Independent Multicast-Sparse Mode). This application focuses on PIM-SM, and no longer describes PIM-DM. [0003] In the PIM-SM domain, the bootstrap router (BSR: Boot Strap Router) is the management core of the PIM-SM domain. There can only be one BSR in a PIM-SM domain, but multiple C-BSRs (Candidate-BSR, Candidate-BSR, Candidate BSR). In this way, once a BSR fails, othe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/803H04L12/761H04L45/16
CPCH04L47/125H04L49/201
Inventor 林日锋
Owner NEW H3C TECH CO LTD