RGMP: Cisco router port group management protocol

RGMP: Cisco router port group management protocol (rgmp) makes up for the Internet group management protocol (Igmp: Internet group management protocol) problems in snoopIng technical mechanisms. The rgmp protocol acts between multicast routers and switches. Rgmp allows you to fix multicast data packets forwarded by vswitches in the required vro. Rgmp is designed for backbone swItched networks, which is connected to multiple vrouters ). The limitations of the Igmp snoopIng technology are mainly reflected in the following: this technology can only fix multicast traffic to an exchange port that is directly or indirectly connected to the receiver through other switches. In the Igmp snoopIng technology, multicast traffic cannot be fixed at least on the port connected to a multicast router, resulting in the spread of multicast traffic on these ports. Igmps noopIng is an inherent limitation of the mechanism. Based on this, the vro cannot report the traffic status. Therefore, the vswitch only knows the multicast traffic type requested by the host, but does not know the traffic type received by the vro port. The rgmp protocol of www.2cto.com allows you to set multicast traffic to the vro port. To efficiently implement traffic fixation, both network switches and routers must support rgmp. Through rgmp, the backbone switch can know the group type required by each port, and then the multicast router sends the information to the switch. However, the router only sends rgmp information, while ignoring the received rgmp information. When the Group no longer needs to receive communication traffic, the router will send an rgmp departure message (leave message ). In the rgmp protocol, network switches need to consume network ports to achieve rgmp information and perform operations on them. In addition, switches in rgmp cannot forward/spread the received rgmp information to other network ports. Rgmp is designed to be used in combination with the multicast routing selection protocol that supports the distribution tree joIn/prune. The typical protocol is pIm-sm. The rgmp protocol only specifies the Ipv4 multicast route selection operation, excluding IPv6.