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Multicast cutting method, protocol independent multicast router, and two-layer exchanger

A layer 2 switch and router technology, applied in the fields of multicast pruning, protocol-independent multicast routers and layer 2 switches, to achieve the effect of saving bandwidth

Active Publication Date: 2011-05-25
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing protocols cannot prune useless multicast flows from multicast sources to PIM routers at the link layer

Method used

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  • Multicast cutting method, protocol independent multicast router, and two-layer exchanger
  • Multicast cutting method, protocol independent multicast router, and two-layer exchanger
  • Multicast cutting method, protocol independent multicast router, and two-layer exchanger

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Embodiment Construction

[0039]The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] In the present invention, it is assumed that the group management protocol versions used by the entire network are the same, that is, or uniformly use IGMPv2, or uniformly use IGMPv3, or uniformly use Multicast Listener Discovery Protocol Version 1 (MLDv1, Multicast Listener Discovery Protocol Version1) or uniformly Use MLDv2.

[0041] If the group management protocol used in the embodiment of the present invention is IGMPv2 or MLDv1, then different multicast streams are distinguished by the multicast group identifier; if the group management protocol used in the embodiment of the present invention is IGMPv3 or MLDv2, then different multicast streams are distinguished by Distinguished by multicast source ID + multicast group ID.

[0042] In the present invention, the PIM protocol adopts PIM SSM or PIM SM or PIM DM mode. When u...

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Abstract

The invention discloses a multicast cutting method, a protocol independent multicast (PIM) router, and a two-layer exchanger. A multicast source is connected to a first jump PIM router through the two-layer exchanger. The method comprises the following steps that: after receiving a multicast flow transmitted from the multicast source, the first jump PIM router determines that there is no need for receiving the multicast flow; or after receiving a PIM cutting message for a multicast flow transmitted by a downstream PIM router or receiving a multiple management departure message for a multicast flow transmitted by a suspension client thereof, the first jump PIM router determines that there is no need for receiving the multicast flow and then transmits the PIM cutting message outwards from a multicast flow access interface. In the invention, useless multicast flows between the multicast source and the first PIM router are cut.

Description

technical field [0001] The invention relates to the field of multicast technology, in particular to a multicast pruning method, a Protocol Independent Multicast router (PIM, Protocol Independent Multicast) and a Layer 2 switch. Background technique [0002] For ease of understanding, the following conceptual description is first given: [0003] Multicast: A communication method parallel to unicast and broadcast. The multicast system consists of multicast sources, receivers and multicast groups. The source host only sends one piece of data, and the destination address in this data is the multicast group address; all receivers in the multicast group can receive the same data copy, and only the hosts in the multicast group can receive the data . [0004] Internet Group Management Protocol (IGMP, Internet Group Management Protocol): a protocol responsible for management of IP multicast members in the Transmission Control Protocol / Internet Protocol (TCP / IP, Transmission Control...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L45/16H04L47/76
CPCH04L45/16H04L12/185H04L12/18H04L47/15
Inventor 周迪刘宇陈乾业陈旭盛
Owner NEW H3C TECH CO LTD
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