Example: Configuring IPv6 PIM-DM

Network configuration

OSPFv3 runs on the network.
VOD streams are sent to receiver hosts in multicast. The receiver groups of different organizations form stub networks, and one or more receiver hosts exist in each stub network. The entire IPv6 PIM domain is operating in the dense mode.
Host A and Host C are multicast receivers in two stub networks N1 and N2.
MLDv1 runs between Switch A and N1, and between Switch B, Switch C, and N2.

Figure 120: Network diagram

Table 24: Interface and IPv6 address assignment

Device	Interface	IPv6 address	Device	Interface	IPv6 address
Switch A	Vlan-int100	1001::1/64	Switch D	Vlan-int300	4001::1/64
Switch A	Vlan-int103	1002::1/64	Switch D	Vlan-int103	1002::2/64
Switch B	Vlan-int200	2001::1/64	Switch D	Vlan-int101	2002::2/64
Switch B	Vlan-int101	2002::1/64	Switch D	Vlan-int102	3001::2/64
Switch C	Vlan-int200	2001::2/64	Switch D	Vlan-int300	4001::1/64
Switch C	Vlan-int102	3001::1/64	Switch D	Vlan-int103	1002::2/64

Procedure

Assign an IPv6 address and prefix length to each interface, as shown in Figure 120. (Details not shown.)
Configure OSPFv3 on the switches in the IPv6 PIM-DM domain. (Details not shown.)

Enable IPv6 multicast routing, MLD, and IPv6 PIM-DM:

# On Switch A, enable IPv6 multicast routing.

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

# Enable MLD on VLAN-interface 100 (the interface that is connected to the stub network).

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

# Enable IPv6 PIM-DM on VLAN-interface 103.

[SwitchA] interface vlan-interface 103
[SwitchA-Vlan-interface103] ipv6 pim dm
[SwitchA-Vlan-interface103] quit

# Enable IPv6 multicast routing, MLD, and IPv6 PIM-DM on Switch B and Switch C in the same way Switch A is configured. (Details not shown.)

# On Switch D, enable IPv6 multicast routing, and enable IPv6 PIM-DM on each interface.

<SwitchD> system-view
[SwitchD] ipv6 multicast routing
[SwitchD-mrib6] quit
[SwitchD] interface vlan-interface 300
[SwitchD-Vlan-interface300] ipv6 pim dm
[SwitchD-Vlan-interface300] quit
[SwitchD] interface vlan-interface 103
[SwitchD-Vlan-interface103] ipv6 pim dm
[SwitchD-Vlan-interface103] quit
[SwitchD] interface vlan-interface 101
[SwitchD-Vlan-interface101] ipv6 pim dm
[SwitchD-Vlan-interface101] quit
[SwitchD] interface vlan-interface 102
[SwitchD-Vlan-interface102] ipv6 pim dm
[SwitchD-Vlan-interface102] quit

Verifying the configuration

# Display IPv6 PIM information on Switch D.

[SwitchD] display ipv6 pim interface
 Interface          NbrCnt HelloInt   DR-Pri     DR-Address
 Vlan300            0      30         1          FE80::A01:201:1
                                                 (local)
 Vlan103            0      30         1          FE80::A01:201:2
                                                 (local)
 Vlan101            1      30         1          FE80::A01:201:3
                                                 (local)
 Vlan102            1      30         1          FE80::A01:201:4
                                                 (local)

# Display IPv6 PIM neighboring relationship on Switch D.

[SwitchD] display ipv6 pim neighbor
 Total Number of Neighbors = 3

 Neighbor        Interface           Uptime   Expires  Dr-Priority
 FE80::A01:101:1 Vlan103             00:04:00 00:01:29 1
 FE80::B01:102:2 Vlan101             00:04:16 00:01:29 3
 FE80::C01:103:3 Vlan102             00:03:54 00:01:17 5

# Send an MLD report from Host A to join IPv6 multicast group FF0E::101. (Details not shown.)

# Send IPv6 multicast data from IPv6 multicast source 4001::100/64 to IPv6 multicast group FF0E::101. (Details not shown.)

# Display IPv6 PIM multicast routing table information on Switch A.

[SwitchA] display ipv6 pim routing-table
 Total 1 (*, G) entry; 1 (S, G) entry

 (*, FF0E::101)
     Protocol: pim-dm, Flag: WC
     UpTime: 00:01:24
     Upstream interface: NULL
         Upstream neighbor: NULL
         RPF prime neighbor: NULL
     Downstream interface(s) information:
     Total number of downstreams: 1
         1: Vlan-interface100
             Protocol: mld, UpTime: 00:01:20, Expires: -

 (4001::100, FF0E::101)
     Protocol: pim-dm, Flag: ACT
     UpTime: 00:01:20
     Upstream interface: Vlan-interface103
         Upstream neighbor: 1002::2
         RPF prime neighbor: 1002::2
     Downstream interface(s) information:
     Total number of downstreams: 1
         1: Vlan-interface100
             Protocol: pim-dm, UpTime: 00:01:20, Expires: -

# Display IPv6 PIM multicast routing table information on Switch D.

[SwitchD] display ipv6 pim routing-table
 Total 0 (*, G) entry; 1 (S, G) entry

 (4001::100, FF0E::101)
     Protocol: pim-dm, Flag: LOC ACT
     UpTime: 00:02:19
     Upstream interface: Vlan-interface300
         Upstream neighbor: NULL
         RPF prime neighbor: NULL
     Downstream interface(s) information:
     Total number of downstreams: 2
         1: Vlan-interface103
             Protocol: pim-dm, UpTime: 00:02:19, Expires: -
         2: Vlan-interface102
             Protocol: pim-dm, UpTime: 00:02:19, Expires: -

The output shows the following information:

Switches on the SPT path (Switch A and Switch D) have the correct (S, G) entries.
Switch A has a correct (*, G) entry.

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