Static Router Port Configuration - H3C S5500-EI Series Operation Manual

Operation Manual – Multicast
H3C S5500-EI Series Ethernet Switches
As shown above, GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 of Switch A have
joined multicast group 224.1.1.1.

2.8.2 Static Router Port Configuration

I. Network requirements
As shown in
GigabitEthernet 1/0/2, and to Switch A through GigabitEthernet 1/0/1.
IGMP is to run between Router A and Switch A, and IGMP Snooping is to run on
Switch A, Switch B and Switch C, with Router A acting as the IGMP querier.
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 multicast traffic
flows to the receivers, Host A and Host C, attached to Switch C only along the path
of Switch A—Switch B—Switch C.
Now it is required to configure GigabitEthernet 1/0/3 that connects Switch A to
Switch C as a static router port, so that multicast traffic can flows 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 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 will be interrupted during this process.
Figure 2-4, Router A connects to a multicast source (Source) through
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Chapter 2 IGMP Snooping Configuration