38
MAC group address:0100-5e01-0101
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 on Switch A have joined the
multicast group 224.1.1.1.
Static port configuration example (in a VLAN)
Network requirements
As shown in
:
•
IGMPv2 runs on Router A, and IGMPv2 snooping runs on Switch A, Switch B, and Switch C,
with Router A acting as the IGMP querier.
•
Host A and host C are permanent receivers of multicast group 224.1.1.1.
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 224.1.1.1.
•
Suppose the STP runs on the network. To avoid data loops, the forwarding path from Switch A
to Switch C is blocked under normal conditions. Multicast traffic flows to the receivers attached
to Switch C only along the path of Switch A—Switch B—Switch C. To make sure multicast traffic
can flow to the receivers nearly uninterruptedly along the path of Switch A—Switch C, configure
GigabitEthernet 1/0/3 on Switch A as a static router port.
NOTE:
If no static router port is configured, when the path of Switch A—Switch B—Switch C is blocked, at
least one IGMP query-response cycle must be completed before the multicast data can flow to the
receivers along the new path of Switch A—Switch C. Namely, multicast delivery is interrupted during
this process.
For more information about STP, see
Layer 2—LAN Switching Configuration Guide
.
