Example: Configuring VLAN-based MLD snooping proxying

As shown in Figure 88, Router A runs MLDv1 and acts as the MLD querier. Switch A runs MLDv1 snooping. Configure MLD snooping proxying so that Switch A can perform the following actions:

• Forward MLD report and done messages to Router A.

• Respond to MLD queries sent by Router A and forward the queries to downstream hosts.

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1. Assign an IPv6 address and subnet mask to each interface, as shown in Figure 88. (Details not shown.)

2. Configure Router A:

   # Enable IPv6 multicast routing.

   <RouterA> system-view
   [RouterA] ipv6 multicast routing
   [RouterA-mrib6] quit
   

   # Enable MLD and IPv6 PIM-DM on HundredGigE 1/0/1.

   [RouterA] interface hundredgige 1/0/1
   [RouterA-HundredGigE1/0/1] mld enable
   [RouterA-HundredGigE1/0/1] ipv6 pim dm
   [RouterA-HundredGigE1/0/1] quit
   

   # Enable IPv6 PIM-DM on HundredGigE 1/0/2.

   [RouterA] interface hundredgige 1/0/2
   [RouterA-HundredGigE1/0/2] ipv6 pim dm
   [RouterA-HundredGigE1/0/2] quit
   

3. Configure Switch A:

   # Enable the MLD snooping feature.

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

   # Create VLAN 100, and assign HundredGigE 1/0/1 through HundredGigE 1/0/4 to the VLAN.

   [SwitchA] vlan 100
   [SwitchA-vlan100] port hundredgige 1/0/1 to hundredgige 1/0/4
   

   # Enable MLD snooping and MLD snooping proxying for the VLAN.

   [SwitchA-vlan100] mld-snooping enable
   [SwitchA-vlan100] mld-snooping proxy enable
   [SwitchA-vlan100] quit
   

# Send MLD reports from Host A and Host B to join IPv6 multicast group FF1E::101. (Details not shown.)

# Display MLD snooping group entries on Switch A.

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

VLAN 100: Total 1 entries.
  (::, FF1E::101)
    Host ports (2 in total):
      HGE1/0/3                                     (00:04:09)
      HGE1/0/4                                     (00:03:06)

The output shows that HundredGigE 1/0/3 and HundredGigE 1/0/4 are member ports of IPv6 multicast group FF1E::101. Host A and Host B will receive IPv6 multicast data for the group.

# Display MLD group membership information on Router A.

[RouterA] display mld group
MLD groups in total: 1
 HundredGigE1/0/1(2001::1):
  MLD groups reported in total: 1
   Group address: FF1E::101
    Last reporter: FE80::2FF:FFFF:FE00:1
    Uptime: 00:00:31
    Expires: 00:03:48

# Send an MLD done message from Host A to leave IPv6 multicast group FF1E::101. (Details not shown.)

# Display MLD snooping group entries on Switch A.

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

VLAN 100: Total 1 entries.
  (::, FF1E::101)
    Host ports (1 in total):
      HGE1/0/3                                     ( 00:01:23 )

The output shows that HundredGigE 1/0/3 is the only member port of IPv6 multicast group FF1E::101. Only Host B will receive IPv6 multicast data for the group.