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Ethernet supporting source specific multicast forwarding method and system

An Ethernet and source-specific technology, applied in the field of network communication, can solve problems such as increasing equipment complexity and difficulty in meeting technical requirements, and achieve the effect of reducing equipment costs, upgrade costs, and investment costs

Active Publication Date: 2008-02-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 2. Since the forwarding mechanism and the protocol stack of the Ethernet switching equipment have been greatly changed, it is difficult for the existing equipment to meet the technical requirements, and it is necessary to greatly improve the existing hardware equipment, which increases the complexity of the equipment;
[0009] 3. For the original Ethernet switching equipment that realizes multicast forwarding, this technology cannot be realized only through software upgrades

Method used

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  • Ethernet supporting source specific multicast forwarding method and system
  • Ethernet supporting source specific multicast forwarding method and system
  • Ethernet supporting source specific multicast forwarding method and system

Examples

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Embodiment Construction

[0062] The core idea of ​​the present invention is: through the combination of S and G, namely (S, G) mapping DMAC obtains SS-DMAC (Source-special DMAC, source-specific DMAC), Ethernet switching equipment configures forwarding port list based on SS-DMAC, router When performing Ethernet encapsulation of SSM-related IP messages, the SS-DMAC address is encapsulated into the message as a DMAC address, so that the DMAC address contains the information of the multicast source SIP, so that the Ethernet switching device performs VLAN+ based SSM can be supported during multicast forwarding of DMAC.

[0063] The specific process is:

[0064] Firstly, the corresponding relationship between (S, G) of the SSM and the DMAC is established in the router. When the router performs Ethernet encapsulation of the SSM multicast IP message, it does not use the AS-DMAC obtained only based on the multicast IP address, but obtains the SS-DMAC according to the correspondence between (S, G) and the DMAC...

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Abstract

The present invention discloses a method and system which enables the internet to support the transferring of the SSM, with the core technique being: an SS-DMAC is obtained through the reflection of the GIP combination of a multicast source SIP and a multicast group IP address; the switch device of the internet is based on a distributing and transferring port list of the SS-DMAC; a router packs the SS-DMAC as a DMAC label into the message when the router is conducting the package of the internet through the transferring of the IP message by the SSM, thus the DMAC of the internet message contains the information of the multicast source SIP so as the enable the internet switch device to support the SSM during the multicast transferring which is based on the VLAN plus DMAC. Compared with the prior art, the method of the present invention is helpful for the reduction in the device cost and upgrading cost of the whole network, is the most compatible for the present devices and reduces the investment of the operators in the greatest degree.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and system for Ethernet supporting SSM forwarding. Background technique [0002] In SSM (Source-Specific Multicast, source-specific multicast), the host adopts IGMP (Internet Group Management Protocol, Internet Group Management Protocol) v3 (version 3) to join the multicast group. The multicast group to join also specifies which S (Source) to join, that is, the multicast group sent by SIP (multicast source IP address, referred to as the multicast source, identified by the IP address of the source), other SIP The same multicast group sent is not accepted by this host. After adopting SSM, the router needs to control the forwarding based on (S, G) (wherein G, namely GIP, the multicast group IP address, is identified by the group IP address of the IP multicast message), so as to realize that only based on the specific S and G's multicast packets are sent to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56
CPCH04L12/4633H04L12/185H04L45/16
Inventor 李桥
Owner HUAWEI TECH CO LTD
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