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Method for multicast user quick access

A multicast and user technology, which is applied in the branch office to provide special service devices, data exchange details, data exchange through path configuration, etc., can solve problems such as forwarding failure, and achieve the effect of improving performance and fast access

Active Publication Date: 2011-01-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because there is no corresponding multicast membership entry on line card 2, the forwarding fails

Method used

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  • Method for multicast user quick access
  • Method for multicast user quick access
  • Method for multicast user quick access

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The key of the present invention is that the message carrying the multicast capacity value is mutually transmitted between the main control (main device) and the line card (stacking device), so as to maintain a multicast capacity comparison table on the main control and the line card respectively, so that users with When line cards with different multicast capacities run multicast services in the same rack, the multicast forwarding index can be allocated more reasonably through the hash algorithm according to the multicast capacity comparison table information on the line card, avoiding multicast forwarding index conflicts caused by multicast Traffic forwarding failure or redundancy causes the problem that multicast users cannot access in time.

[0032] refer to figure 1 and figure 2 The method for quickly accessing multicast users in the embodiment of the present invention is used in a distributed system including a master control and multiple line cards, and the met...

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Abstract

The invention provides a method for rapidly accessing multicast users. The method comprises the following steps: constructing a multicast capacity comparison list in a main controller and each line card; acquiring the minimal multicast capacity value from the multicast capacity comparison list of the line card when the line card snoops an IGMP addition message transmitted by a user, and acquiringa multicast transmission index according to the available minimal multicast capacity value, the multicast address where a user requests to be added and a VLAN mark; and adding the multicast transmission index, the multicast address, the VLAN mark and a port information to a multicast member relationship list in the line card. According to the invention, the multicast member relationship list on the line card can be constructed more reasonably to prevent the occurrence of multicast flow transmission failure or redundancy caused by the conflict of the multicast transmission indexes during achieving co-frame multicast service of various line cards with different multicast capacities, thereby rapidly accessing multicast users.

Description

technical field [0001] The invention belongs to the technical field of multicast forwarding, and in particular relates to a method for quickly accessing multicast users in a distributed system including a master control and multiple line cards. Background technique [0002] Internet Group Management Protocol (Internet Group Management Protocol, IGMP) is responsible for the collection and maintenance of the membership of the connected network group. As a basic signaling mechanism, IGMP notifies the routers in the subnet that a certain host is eager to become a member of a certain multicast group, and establishes and maintains these group memberships between the host and the multicast router. When a multicast host member wishes to join a specified multicast group and expects to receive multicast traffic, it sends an IGMP message to notify the local multicast router. A multicast router obtains host information through IGMP, and establishes and maintains a multicast membership ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/18H04L12/56H04L12/46H04L12/743
Inventor 王鸾
Owner ZTE CORP