H3C Technologies H3C S10500 Series Switches - Manual (Page 56)

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The output shows that GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 of Switch A has joined
multicast group 224.1.1.1.
Static port configuration example
Network requirements
• As shown in Figure 15 , Router A connects to a multicast source (Source) through GigabitEthernet
1/0/2, and to Switch A through GigabitEthernet 1/0/1.
• IGMPv2 runs on Router A, and IGMPv2 snooping runs on Switch A, Switch B, and Switch C. Router
A acts as the IGMP querier.
• Host A and host C are permanent receivers of multicast group 224.1.1.1. GigabitEthernet 1/0/3
and GigabitEthernet 1/0/5 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.
• 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.
• Configure GigabitEthernet 1/0/3 on Switch A 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.
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.
• For more information about the Spanning Tree Protocol (STP), see Layer 2—LAN Switching
Configuration Guide.
Figure 15 Network diagram for static port configuration
Source
1.1.1.1/24
Router A
IGMP querier
GE1/0/1
10.1.1.1/24
Switch A
Switch B
Switch C
GE1/0/1
GE
1/0
/2
GE
1/0
/3
GE
1/0
/1
G
E1/0/2
GE
1/0
/1
GE1/0/2
GE
1/0
/3
GE1
/0/4 GE
1/0
/5
Host A
Receiver
Host B
Host C
Receiver
VLAN 100
GE1/0/2
1.1.1.2/24