Basic IGMP features configuration example

As shown in Figure 38:

• OSPF and PIM-DM run on the network.

• VOD streams are sent to receiver hosts in multicast. Receiver hosts of different organizations form stub networks N1 and N2. Host A and Host C are receiver hosts in N1 and N2, respectively.

• IGMPv2 runs between Switch A and N1, and between the other two switches and N2. Switch A acts as the IGMP querier in N1. Switch B acts as the IGMP querier in N2 because it has a lower IP address.

Configure the routers to meet the following requirements:

• The hosts in N1 can join only multicast group 224.1.1.1.

• The hosts in N2 can join any multicast groups.

1. Assign an IP address and subnet mask to each interface, as shown in Figure 38. (Details not shown.)

2. Configure OSPF on the switches in the PIM-DM domain. (Details not shown.)

3. Enable IP multicast routing, IGMP, and PIM-DM:

   # On Switch A, enable IP multicast routing.

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

   # Enable IGMP on VLAN-interface 100.

   [SwitchA] interface vlan-interface 100
   [SwitchA-Vlan-interface100] igmp enable
   [SwitchA-Vlan-interface100] quit
   

   # Enable PIM-DM on VLAN-interface 101.

   [SwitchA] interface vlan-interface 101
   [SwitchA-Vlan-interface101] pim dm
   [SwitchA-Vlan-interface101] quit
   

   # On Switch B, enable IP multicast routing.

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

   # Enable IGMP on VLAN-interface 200.

   [SwitchB] interface vlan-interface 200
   [SwitchB-Vlan-interface200] igmp enable
   [SwitchB-Vlan-interface200] quit
   

   # Enable PIM-DM on VLAN-interface 201.

   [SwitchB] interface vlan-interface 201
   [SwitchB-Vlan-interface201] pim dm
   [SwitchB-Vlan-interface201] quit
   

   # On Switch C, enable IP multicast routing.

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

   # Enable IGMP on VLAN-interface 200.

   [SwitchC] interface vlan-interface 200
   [SwitchC-Vlan-interface200] igmp enable
   [SwitchC-Vlan-interface200] quit
   

   # Enable PIM-DM on VLAN-interface 202.

   [SwitchC] interface vlan-interface 202
   [SwitchC-Vlan-interface202] pim dm
   [SwitchC-Vlan-interface202] quit
   

4. Configure a multicast group policy on Switch A so that hosts connected to VLAN-interface 100 can join only multicast group 224.1.1.1.

   [SwitchA] acl basic 2001
   [SwitchA-acl-ipv4-basic-2001] rule permit source 224.1.1.1 0
   [SwitchA-acl-ipv4-basic-2001] quit
   [SwitchA] interface vlan-interface 100
   [SwitchA-Vlan-interface100] igmp group-policy 2001
   [SwitchA-Vlan-interface100] quit
   

# Display IGMP information for VLAN-interface 200 on Switch B.

[SwitchB] display igmp interface vlan-interface 200
 Vlan-interface200(10.110.2.1):
   IGMP is enabled.
   IGMP version: 2
   Query interval for IGMP: 125s
   Other querier present time for IGMP: 255s
   Maximum query response time for IGMP: 10s
   Querier for IGMP: 10.110.2.1 (This router)
  IGMP groups reported in total: 1