93
Total 1 IP Source(s).
Total 1 MAC Group(s).
Router port(s):total 1 port(s).
Eth1/0/1 (D) ( 00:01:30 )
IP group(s):the following ip group(s) match to one mac group.
IP group address:FF1E::101
(::, FF1E::101):
Attribute: Host Port
Host port(s):total 1 port(s).
Eth1/0/3 (D) ( 00:04:10 )
MAC group(s):
MAC group address:3333-0000-0101
Host port(s):total 1 port(s).
Eth1/0/3
The output shows that Ethernet 1/0/3 on Switch B has joined FF1E::101 but not FF1E::102.
Assume that Source 2 starts sending multicast traffic to FF1E::101. Use the
display multicast ipv6
forwarding-table
to display the IPv6 multicast forwarding table information.
# Display the information about FF1E::101 in the IPv6 multicast forwarding table on Switch A.
[SwitchA] display multicast ipv6 forwarding-table ff1e::101
IPv6 Multicast Forwarding Table
Total 1 entry
Total 1 entry matched
00001. (1::1, FF1E::101)
MID: 0, Flags: 0x0:0
Uptime: 00:08:32, Timeout in: 00:03:26
Incoming interface: Vlan-interface101
List of 1 outgoing interfaces:
1: Vlan-interface104
Matched 19648 packets(20512512 bytes), Wrong If 0 packets
Forwarded 19648 packets(20512512 bytes)
The output shows that Switch A maintains a multicast forwarding entry for multicast packets from Source
1 to FF1E::101. No forwarding entry exists for packets from Source 2 to FF1E::101, which indicates that
IPv6 multicast packets from Source 2 are blocked.
Troubleshooting MLD snooping
Layer 2 multicast forwarding cannot function
Symptom
Layer 2 multicast forwarding cannot function.
Analysis
MLD snooping is not enabled.
