User's Manual

Configuration Guide of XGS-5240-Series
42-21
ip multicast ssm range <1-99>
ip multicast ssm default
no ip mulitcast ssm
To configure the address range for IGMP
proxy ssm multicast groups; The no form
of this command will remove the configura
tion.
ip igmp proxy multicast-source
no ip igmp proxy multicast-source
To configure the port as downstream ports
for the source of multicast datagram; The
no from of this command will disable the
configuration.
42.4.3 IGMP Proxy Examples
Example 1: IGMP Proxy function.
Fig 1-4 IGMP Proxy Topology Diagram
As it is show in the figure above, the switch functions as IGMP Proxy in a networ
k of topology of tree, the switch aggregates the multicast dataflow from upstream port
and redistributes them to the downstream ports, while the IGMP membership reports flo
w from downstream ports to upstream ports. Three IGMP Proxy enabled switches whic
h are connected in tree topology, respectively have one port connected to multicast rou
ters, and no less than one ports connected to hosts or upstream ports from other IGM
P Proxy enabled switches.
Multicast
Server
Multicast
Router
IGMP PROXY
Switch 2
IGMP PROXY
Switch 1
IGMP PROXY
Switch 3
Multicast
Router