300
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 GigabitEthernet 1/0/4 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 groups. For example:
# Display information about MLD snooping 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, P-PIM 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(s).
GE1/0/1 (D)
IP group(s):the following ip group(s) match to one mac group.
IP group address:FF1E::101
(::, FF1E::101):
Host port(s):total 1 port(s).
GE1/0/3 (D)
MAC group(s):
MAC group address:3333-0000-0101
Host port(s):total 1 port(s).
GE1/0/3
IPv6 multicast source and user control policy configuration
example
Network requirements
As shown in Figure 74, Switch A is a Layer-3 switch. MLDv1 runs on Switch A and MLDv1 snooping runs
on Switch B. Multicast sources and hosts run 802.1X client.
An IPv6 multicast source control policy is configured on Switch A to block multicast flows from Source 2
to FF1E::101. An IPv6 multicast user control policy is configured on Switch B so that Host A can join or
leave only multicast group FF1E::101.
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