Static port configuration example

As shown in Figure 13:

• Router A runs IGMPv2 and serves as the IGMP querier. Switch A, Switch B, and Switch C run IGMPv2 snooping.

• Host A and host C are permanent receivers of multicast group 224.1.1.1.

Configure static ports to meet the following requirements:

• To enhance the reliability of multicast traffic transmission, configure FortyGigE 1/0/3 and FortyGigE 1/0/5 on Switch C as static member ports for multicast group 224.1.1.1.

• Suppose the STP runs on the network. The forwarding path from Switch A to Switch C is blocked to avoid data loops. Multicast data flows to the receivers attached to Switch C only along the path of Switch A—Switch B—Switch C. When this path is blocked, a maximum of one IGMP query-response cycle must be completed before multicast data flows to the receivers along the path of Switch A—Switch C. In this case, the multicast delivery is interrupted. For more information about the STP, see Layer 2—LAN Switching Configuration Guide.

  Configure FortyGigE 1/0/3 on Switch A as a static router port. Then, multicast data can flow to the receivers nearly uninterruptedly along the path of Switch A—Switch C when the path of Switch A—Switch B—Switch C is blocked.

  Figure 13: Network diagram

  

1. Assign an IP address and subnet mask to each interface according to Figure 13. (Details not shown.)

2. Configure Router A:

   # Enable IP multicast routing.

   <RouterA> system-view
   [RouterA] multicast routing
   [RouterA-mrib] quit
   

   # Enable IGMP and PIM-DM on FortyGigE 1/0/1.

   [RouterA] interface fortygige 1/0/1
   [RouterA-FortyGigE1/0/1] igmp enable
   [RouterA-FortyGigE1/0/1] pim dm
   [RouterA-FortyGigE1/0/1] quit
   

   # Enable PIM-DM on FortyGigE 1/0/2.

   [RouterA] interface fortygige 1/0/2
   [RouterA-FortyGigE1/0/2] pim dm
   [RouterA-FortyGigE1/0/2] quit
   

3. Configure Switch A:

   # Enable IGMP snooping globally.

   <SwitchA> system-view
   [SwitchA] igmp-snooping
   [SwitchA-igmp-snooping] quit
   

   # Create VLAN 100, assign FortyGigE 1/0/1 through FortyGigE 1/0/3 to the VLAN, and enable IGMP snooping for the VLAN.

   [SwitchA] vlan 100
   [SwitchA-vlan100] port fortygige 1/0/1 to fortygige 1/0/3
   [SwitchA-vlan100] igmp-snooping enable
   [SwitchA-vlan100] quit
   

   # Configure FortyGigE 1/0/3 as a static router port.

   [SwitchA] interface fortygige 1/0/3
   [SwitchA-FortyGigE1/0/3] igmp-snooping static-router-port vlan 100
   [SwitchA-FortyGigE1/0/3] quit
   

4. Configure Switch B:

   # Enable IGMP snooping globally.

   <SwitchB> system-view
   [SwitchB] igmp-snooping
   [SwitchB-igmp-snooping] quit
   

   # Create VLAN 100, assign FortyGigE 1/0/1 and FortyGigE 1/0/2 to the VLAN, and enable IGMP snooping for the VLAN.

   [SwitchB] vlan 100
   [SwitchB-vlan100] port fortygige 1/0/1 fortygige 1/0/2
   [SwitchB-vlan100] igmp-snooping enable
   [SwitchB-vlan100] quit
   

5. Configure Switch C:

   # Enable IGMP snooping globally.

   <SwitchC> system-view
   [SwitchC] igmp-snooping
   [SwitchC-igmp-snooping] quit
   

   # Create VLAN 100, assign FortyGigE 1/0/1 through FortyGigE 1/0/5 to the VLAN, and enable IGMP snooping for the VLAN.

   [SwitchC] vlan 100
   [SwitchC-vlan100] port fortygige 1/0/1 to fortygige 1/0/5
   [SwitchC-vlan100] igmp-snooping enable
   [SwitchC-vlan100] quit
   

   # Configure FortyGigE 1/0/3 and FortyGigE 1/0/5 as static member ports for multicast group 224.1.1.1.

   [SwitchC] interface fortygige 1/0/3
   [SwitchC-FortyGigE1/0/3] igmp-snooping static-group 224.1.1.1 vlan 100
   [SwitchC-FortyGigE1/0/3] quit
   [SwitchC] interface fortygige 1/0/5
   [SwitchC-FortyGigE1/0/5] igmp-snooping static-group 224.1.1.1 vlan 100
   [SwitchC-FortyGigE1/0/5] quit
   

# Display information about static router ports in VLAN 100 on Switch A.

[SwitchA] display igmp-snooping static-router-port vlan 100
VLAN 100:
  Router slots (1 in total):
    1
  Router ports (1 in total):
    1
    FGE1/0/3

The output shows that FortyGigE 1/0/3 on Switch A has become a static router port.

# Display information about static IGMP snooping forwarding entries in VLAN 100 on Switch C.

[SwitchC] display igmp-snooping static-group vlan 100
Total 1 entries.

VLAN 100: Total 1 entries.
  (0.0.0.0, 224.1.1.1)
    Host slots (1 in total):
      1
    Host ports (2 in total):
      FGE1/0/3
      FGE1/0/5

The output shows that FortyGigE 1/0/3 and FortyGigE 1/0/5 on Switch C have become static member ports of multicast group 224.1.1.1.