Chapter 24: Multicast Listener Discovery (MLD) Snooping Commands
430 Section IV: Security and Traffic Control
ADD MLDSNOOPING MCGROUP
Syntax
add igmpsnooping mcgroup=
ipv6_address
[routerport=
port_list
|all]
Parametersv
mcgroup
Specifies a multicast group IPv6 address for MLD Snooping. This
IPv6 address is the name of the multicast group.
ipv6_address
Specifies the IPv6 address of the multicast group.
Here is the guidelines for IPv6 multicast addresses.
– Specify an IPv6 address in the full format
ff
ff
:
ffff
:
ffff
:
ffff
:
ffff
:
ffff
:
ffff
:
ffff
or the zero
compressed format.
For example, an IPv6 address of
ff05:0000:0001:0000:0000:0000:0000:0101 in the full
format is
ff05:0:1::101 in the zero compressed format.
– The first two most significant bits must be “
ff” to be a
multicast address.
– The range of 112-bit group IDs for the IPv6 address is shown
in Table 51 on page 431.
routerport
Specifies router ports. The router port is a port connected to the
IPv6 multicast router. The switch adds a port as a router port when
the port receives a Query packet only if the port is on this port list.
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 for MLD Snooping. The switch
forwards traffic addressed to an IPv6 multicast group only to the router
port for the multicast group.
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