328
(::, FF1E::101):
Attribute: Host Port
Host port(s):total 2 port(s).
GE1/0/3 (D) ( 00:03:23 )
GE1/0/4 (D) ( 00:04:10 )
MAC group(s):
MAC group address:3333-0000-0101
Host port(s):total 2 port(s).
GE1/0/3
GE1/0/4
The output shows that GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 of Switch A have joined the
IPv6 multicast group FF1E::101.
Static port configuration example (in a VLAN)
Network requirements
As shown in
:
•
MLDv1 runs on Router A, and MLDv1 snooping runs on Switch A, Switch B, and Switch C.
Router A acts as the MLD querier.
•
Host A and host C are permanent receivers of IPv6 multicast group FF1E::101.
Perform the following tasks to meet the requirements:
•
To enhance the reliability of multicast traffic transmission, configure GigabitEthernet 1/0/3 and
GigabitEthernet 1/0/5 on Switch C as static member ports for multicast group FF1E::101.
•
Suppose STP runs on the network. To avoid data loops, the forwarding path from Switch A to
Switch C is blocked under normal conditions, and IPv6 multicast traffic flows to the receivers
attached to Switch C only along the path of Switch A—Switch B—Switch C.
•
Configure GigabitEthernet 1/0/3 on Switch C as a static router port, so that IPv6 multicast traffic
can flow to the receivers nearly uninterruptedly along the path of Switch A—Switch C in the
case that the path of Switch A—Switch B—Switch C gets blocked.
NOTE:
If no static router port is configured, when the path of Switch A—Switch B—Switch C gets blocked,
at least one MLD query-response cycle must be completed before the IPv6 multicast data can flow
to the receivers along the new path of Switch A—Switch C. Namely, IPv6 multicast delivery will be
interrupted during this process.
For more information about the STP, see
Layer 2—LAN Switching Configuration Guide
.
