Example: Configuring port-based multicast VLAN

As shown in Figure 26:

• Layer 3 device Switch A runs IGMPv2 and acts as the IGMP querier. Layer 2 device Switch B runs IGMPv2 snooping.

• The multicast source sends multicast data to multicast group 224.1.1.1. Receivers Host A, Host B, and Host C belong to VLAN 2, VLAN 3, and VLAN 4, respectively.

Configure a port-based multicast VLAN on Switch B to meet the following requirements:

• Switch A sends multicast data to Switch B through the multicast VLAN.

• Switch B forwards the multicast data to the receivers in different user VLANs.

1. Configure Switch A:

   # Enable IP multicast routing.

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

   # Create VLAN 20, and assign HundredGigE 1/0/2 to the VLAN.

   [SwitchA] vlan 20
   [SwitchA-vlan20] port hundredgige 1/0/2
   [SwitchA-vlan20] quit
   

   # Assign an IP address to VLAN-interface 20, and enable PIM-DM on the interface.

   [SwitchA] interface vlan-interface 20
   [SwitchA-Vlan-interface20] ip address 1.1.1.2 24
   [SwitchA-Vlan-interface20] pim dm
   [SwitchA-Vlan-interface20] quit
   

   # Create VLAN 10, and assign HundredGigE 1/0/1 to the VLAN.

   [SwitchA] vlan 10
   [SwitchA-vlan10] port hundredgige 1/0/1
   [SwitchA-vlan10] quit
   

   # Assign an IP address to VLAN-interface 10, and enable IGMP on the interface.

   [SwitchA] interface vlan-interface 10
   [SwitchA-Vlan-interface10] ip address 10.110.1.1 24
   [SwitchA-Vlan-interface10] igmp enable
   [SwitchA-Vlan-interface10] quit
   

2. Configure Switch B:

   # Enable the IGMP snooping feature.

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

   # Create VLAN 10, assign HundredGigE 1/0/1 to the VLAN, and enable IGMP snooping for the VLAN.

   [SwitchB] vlan 10
   [SwitchB-vlan10] port hundredgige 1/0/1
   [SwitchB-vlan10] igmp-snooping enable
   [SwitchB-vlan10] quit
   

   # Create VLAN 2, and enable IGMP snooping for the VLAN.

   [SwitchB] vlan 2
   [SwitchB-vlan2] igmp-snooping enable
   [SwitchB-vlan2] quit
   

   # Create VLAN 3, and enable IGMP snooping for the VLAN.

   [SwitchB] vlan 3
   [SwitchB-vlan3] igmp-snooping enable
   [SwitchB-vlan3] quit
   

   # Create VLAN 4, and enable IGMP snooping for the VLAN.

   [SwitchB] vlan 4
   [SwitchB-vlan4] igmp-snooping enable
   [SwitchB-vlan4] quit
   

   # Configure HundredGigE 1/0/2 as a hybrid port, and configure VLAN 2 as the PVID of the hybrid port.

   [SwitchB] interface hundredgige 1/0/2
   [SwitchB-HundredGigE1/0/2] port link-type hybrid
   [SwitchB-HundredGigE1/0/2] port hybrid pvid vlan 2
   

   # Assign HundredGigE 1/0/2 to VLAN 2 and VLAN 10 as an untagged VLAN member.

   [SwitchB-HundredGigE1/0/2] port hybrid vlan 2 untagged
   [SwitchB-HundredGigE1/0/2] port hybrid vlan 10 untagged
   [SwitchB-HundredGigE1/0/2] quit
   

   # Configure HundredGigE 1/0/3 as a hybrid port, and configure VLAN 3 as the PVID of the hybrid port.

   [SwitchB] interface hundredgige 1/0/3
   [SwitchB-HundredGigE1/0/3] port link-type hybrid
   [SwitchB-HundredGigE1/0/3] port hybrid pvid vlan 3
   

   # Assign HundredGigE 1/0/3 to VLAN 3 and VLAN 10 as an untagged VLAN member.

   [SwitchB-HundredGigE1/0/3] port hybrid vlan 3 untagged
   [SwitchB-HundredGigE1/0/3] port hybrid vlan 10 untagged
   [SwitchB-HundredGigE1/0/3] quit
   

   # Configure GigabitEthernet 1/0/4 as a hybrid port, and configure VLAN 4 as the PVID of the hybrid port.

   [SwitchB] interface hundredgige 1/0/4
   [SwitchB-HundredGigE1/0/4] port link-type hybrid
   [SwitchB-HundredGigE1/0/4] port hybrid pvid vlan 4
   

   # Assign GigabitEthernet 1/0/4 to VLAN 4 and VLAN 10 as an untagged VLAN member.

   [SwitchB-HundredGigE1/0/4] port hybrid vlan 4 untagged
   [SwitchB-HundredGigE1/0/4] port hybrid vlan 10 untagged
   [SwitchB-HundredGigE1/0/4] quit
   

   # Configure VLAN 10 as a multicast VLAN.

   [SwitchB] multicast-vlan 10
   

   # Assign HundredGigE 1/0/2 and HundredGigE 1/0/3 to VLAN 10.

   [SwitchB-mvlan-10] port hundredgige 1/0/2 to hundredgige 1/0/3
   [SwitchB-mvlan-10] quit
   

   # Assign GigabitEthernet 1/0/4 to VLAN 10.

   [SwitchB] interface hundredgige 1/0/4
   [SwitchB-HundredGigE1/0/4] port multicast-vlan 10
   [SwitchB-HundredGigE1/0/4] quit
   

# Display information about multicast VLANs on Switch B.

[SwitchB] display multicast-vlan
Total 1 multicast VLANs.

Multicast VLAN 10:
  Sub-VLAN list(0 in total):
  Port list(3 in total):
    HGE1/0/2
    HGE1/0/3
    HGE1/0/4

# Display dynamic IGMP snooping forwarding entries on Switch B.

[SwitchB] display igmp-snooping group
Total 1 entries.

VLAN 10: Total 1 entries.
  (0.0.0.0, 224.1.1.1)
    Host slots (0 in total):
    Host ports (3 in total):
      HGE1/0/2        (00:03:23)
      HGE1/0/3        (00:04:07)
      HGE1/0/4        (00:04:16)

The output shows that IGMP snooping maintains the user ports in the multicast VLAN (VLAN 10). Switch B will forward the multicast data of VLAN 10 through these user ports.