Host Management

Host Management
Host management is performed by the router. The router continues to receive IGMP messages
from the host. Then the router converts the message into a CGMP message and forwards it to
the switch. The switch then performs the port maintenance as directed by the router. This process
is followed for the multiple types of messages that the host can generate. The router forwards
three critical pieces of information to the switch in the CGMP message:
 Request type
 MAC address of the requesting host
 Multicast group the request is for
The CGMP Leave process is done in the same manner. The router receives the request and
then informs the switch that the multicast group address needs to be removed from the Content
Addressable Memory (CAM) table for the host’s port.