Chapter 23: Internet Group Management Protocol (IGMP) Snooping Commands
418 Section IV: Security and Traffic Control
ADD IGMPSNOOPING MCGROUP
Syntax
add igmpsnooping mcgroup=
ip_address
[number=
number
]
[routerport=
port_list
|all]
Parameters
mcgroup
Specifies a multicast group IP address for IGMP Snooping. This IP
address is the name of the multicast group and the starting IP
address if you specify more than one IP address to the multicast
group.
ip_address
Specifies an IPv4 address.
number
Specifies the number of multcast addresses to add to the group.
The range is 1 to 255 addresses. The default value is 1 address.
routerport
Specifies router ports. The router port is a port connected to the
multicast router. When the port is on this port list, the switch adds a
port as a router port when the port receives a Query packet.
port_list
Specifies a list of ports. To specify multiple ports, use a comma (,)
to separate them. To specify a range of ports, use a hyphen (-).
all
Specifies all the switch ports.
Description
Use this command to add a multicast group and specify router ports for
the multicast group. The switch forwards traffic addressed to a multicast
group only to the router port for the multicast group.
Here are the guidelines for adding a multcast group:
The switch supports IGMP Versions 1, 2, and 3 Snooping except
IGMP Version 3 Snooping Source Filtering.
When an existing multicast group address is added, the command
issues an error.
The IP addresses mapped to the reserved MAC address 01-00-5e-
00-00-nn cannot be used as multicast group addresses. For a list
of the unavailable IP addresses, see Table 49 on page 419.
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