Example: Configuring port-based IPv6 multicast VLAN

As shown in Figure 95:

• Layer 3 device Switch A runs MLDv1 and acts as the MLD querier. Layer 2 device Switch B runs MLDv1 snooping.

• The IPv6 multicast source sends IPv6 multicast data to IPv6 multicast group FF1E::101. Receivers Host A, Host B, and Host C belong to VLAN 2, VLAN 3, and VLAN 4, respectively.

Configure a port-based IPv6 multicast VLAN on Switch B to meet the following requirements:

• Switch A sends IPv6 multicast data to Switch B through the IPv6 multicast VLAN.

• Switch B forwards the IPv6 multicast data to the receivers in different user VLANs.

1. Configure Switch A:

   # Enable IPv6 multicast routing.

   <SwitchA> system-view
   [SwitchA] ipv6 multicast routing
   [SwitchA-mrib6] 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 IPv6 address to VLAN-interface 20, and enable IPv6 PIM-DM on the interface.

   [SwitchA] interface vlan-interface 20
   [SwitchA-Vlan-interface20] ipv6 address 1::2 64
   [SwitchA-Vlan-interface20] ipv6 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 IPv6 address to VLAN-interface 10, and enable MLD on the interface.

   [SwitchA] interface vlan-interface 10
   [SwitchA-Vlan-interface10] ipv6 address 2001::1 64
   [SwitchA-Vlan-interface10] mld enable
   [SwitchA-Vlan-interface10] quit
   

2. Configure Switch B:

   # Enable the MLD snooping feature.

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

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

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

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

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

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

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

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

   [SwitchB] vlan 4
   [SwitchB-vlan4] mld-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 HundredGigE 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 HundredGigE 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 an IPv6 multicast VLAN.

   [SwitchB] ipv6 multicast-vlan 10
   

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

   [SwitchB-ipv6-mvlan-10] port hundredgige 1/0/2 to hundredgige 1/0/3
   [SwitchB-ipv6-mvlan-10] quit
   

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

   [SwitchB] interface hundredgige 1/0/4
   [SwitchB-HundredGigE1/0/4] ipv6 port multicast-vlan 10
   [SwitchB-HundredGigE1/0/4] quit
   

# Display information about IPv6 multicast VLANs on Switch B.

[SwitchB] display ipv6 multicast-vlan
Total 1 IPv6 multicast VLANs.

IPv6 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 MLD snooping forwarding entries on Switch B.

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

VLAN 10: Total 1 entries.
  (::, FF1E::101)
    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 MLD snooping maintains the user ports in the multicast VLAN (VLAN 10). Switch B will forward the IPv6 multicast data of VLAN 10 through these user ports.