Static port configuration example, Network requirements – H3C Technologies H3C S7500E Series Switches User Manual
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As shown above, GigabitEthernet 2/0/3 and GigabitEthernet 2/0/4 of Switch A has joined
multicast group 224.1.1.1.
Static Port Configuration Example
Network requirements
z
As shown in
, Router A connects to a multicast source (Source) through
GigabitEthernet 2/0/2, and to Switch A through GigabitEthernet 2/0/1.
z
IGMPv2 is to run on Router A, and IGMPv2 Snooping is to run on Switch A, Switch B and
Switch C, with Router A acting as the IGMP querier.
z
Host A and host C are permanent receivers of multicast group 224.1.1.1. GigabitEthernet
2/0/3 and GigabitEthernet 2/0/5 on Switch C are required to be configured as static
member ports for multicast group 224.1.1.1 to enhance the reliability of multicast traffic
transmission.
z
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
attached to Switch C only along the path of Switch A—Switch B—Switch C.
z
It is required to configure GigabitEthernet 2/0/3 that connects Switch A to Switch C as a
static router port, so that 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.
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.
For details about the Spanning Tree Protocol (STP), refer to MSTP Configuration in the Layer 2
- LAN Switching Configuration Guide.