Ethernet supporting source specific multicast forwarding method and system

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...

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

Images