IPv6 group policy configuration example

As shown in Figure 44, Router A runs MLDv1 and acts as the MLD querier. Switch A runs MLDv1 snooping.

Configure an IPv6 multicast group policy on Switch A so that Host A and Host B receive IPv6 multicast data for only IPv6 multicast group FF1E::101.

1. Assign an IPv6 address and prefix length to each interface according to Figure 44. (Details not shown.)

2. Configure Router A:

   # Enable IPv6 multicast routing.

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

   # Enable MLD on FortyGigE 1/0/1.

   [RouterA] interface fortygige 1/0/1
   [RouterA-FortyGigE1/0/1] mld enable
   [RouterA-FortyGigE1/0/1] quit
   

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

   [RouterA] interface fortygige 1/0/2
   [RouterA-FortyGigE1/0/2] ipv6 pim dm
   [RouterA-FortyGigE1/0/2] quit
   

3. Configure Switch A:

   # Enable MLD snooping globally.

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

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

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

   # Enable MLD snooping, and enable dropping IPv6 unknown multicast data packets for VLAN 100.

   [SwitchA-vlan100] mld-snooping enable
   [SwitchA-vlan100] mld-snooping drop-unknown
   [SwitchA-vlan100] quit
   

   # Configure an IPv6 multicast group policy so that hosts in VLAN 100 can join only IPv6 multicast group FF1E::101.

   [SwitchA] acl ipv6 number 2001
   [SwitchA-acl6-basic-2001] rule permit source ff1e::101 128
   [SwitchA-acl6-basic-2001] quit
   [SwitchA] mld-snooping
   [SwitchA–mld-snooping] group-policy 2001 vlan 100
   [SwitchA–mld-snooping] quit
   

# Send MLD reports from Host A and Host B to join IPv6 multicast groups FF1E::101 and FF1E::202. (Details not shown.)

# Display dynamic MLD snooping forwarding entries in VLAN 100 on Switch A.

[SwitchA] display mld-snooping group vlan 100
Total 1 entries.

VLAN 100: Total 1 entries.
  (::, FF1E::101)
    Host slots (0 in total):
    Host ports (2 in total):
      FGE1/0/3         (00:03:23)
      FGE1/0/4         (00:04:10)

The output shows the following information:

• Host A and Host B have joined IPv6 multicast group FF1E::101 through FortyGigE 1/0/4 and FortyGigE 1/0/3 on Switch A, respectively.

• Host A and Host B have not joined IPv6 multicast group FF1E::202.