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After the configuration is completed, Host A and Host B send MLD join messages addressed to group
FF1E::101. When receiving the messages, Switch A sends a join message for the group out port
Ethernet 1/0/1 (a router port) to Router A. Use the display mld-snooping group command and the
display mld group command to display information about MLD snooping multicast groups and MLD
multicast groups. For example:
# Display information about MLD snooping multicast groups on Switch A.
[SwitchA] display mld-snooping group
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Port flags: D-Dynamic port, S-Static port, C-Copy port
Subvlan flags: R-Real VLAN, C-Copy VLAN
Vlan(id):100.
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Router port(s):total 1 port.
Eth1/0/1 (D) ( 00:01:23 )
IP group(s):the following ip group(s) match to one mac group.
IP group address:FF1E::101
(::, FF1E::101):
Host port(s):total 2 port.
Eth1/0/3 (D)
Eth1/0/4 (D)
MAC group(s):
MAC group address:3333-0000-0101
Host port(s):total 2 port.
Eth1/0/3
Eth1/0/4
# Display information about MLD multicast groups on Router A.
[RouterA] display mld group
Total 1 MLD Group(s).
Interface group report information
Ethernet1/1(2001::1):
Total 1 MLD Group reported
Group Address: FF1E::1
Last Reporter: FE80::2FF:FFFF:FE00:1
Uptime: 00:00:03
Expires: 00:04:17
When Host A leaves the IPv6 multicast group, it sends an MLD done message to Switch A. Receiving
the message, Switch A removes port Ethernet 1/0/3 from the member port list of the forwarding entry for
the group; however, it does not remove the group or forward the done message to Router A because
Host B is still in the group. Use the display mld-snooping group command to display information
about MLD snooping multicast groups. For example:
# Display information about MLD snooping multicast groups on Switch A.
[SwitchA] display mld-snooping group
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
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