Example for Configuring a Static Interface to Implement Layer 2 Multicast

Networking Requirements

In Figure 1, the router connects to the user network through the Layer 2 switch on an IPv6 network. HostA, HostB, and HostC are the receivers. The user-side VLANIF interface of Router has static groups FF16::1 to FF16::5 configured and does not run MLD. HostA and HostB require to steadily receive data from FF16::1 to FF16::3 while HostC wants to steadily receive data from FF16::4 to FF16::5.

Figure 1 Network diagram for configuring a static interface to implement Layer 2 multicast

Configuration Roadmap

To meet the requirement, MLD snooping static router and member ports need to be configured on the Switch.

Create a VLAN and add interfaces to the VLAN.
Enable MLD snooping globally and in the VLAN.
Configure a static router port.
Configure a static member port.

Procedure

Create VLAN 10 and add the interface to VLAN 10.

<HUAWEI> system-view
[HUAWEI] sysname Switch
[Switch] vlan 10
[Switch-vlan10] quit
[Switch] interface gigabitethernet 0/0/1
[Switch-GigabitEthernet0/0/1] port link-type hybrid
[Switch-GigabitEthernet0/0/1] port hybrid pvid vlan 10
[Switch-GigabitEthernet0/0/1] port hybrid untagged vlan 10
[Switch-GigabitEthernet0/0/1] quit
[Switch] interface gigabitethernet 0/0/2
[Switch-GigabitEthernet0/0/2] port link-type hybrid
[Switch-GigabitEthernet0/0/2] port hybrid pvid vlan 10
[Switch-GigabitEthernet0/0/2] port hybrid untagged vlan 10
[Switch-GigabitEthernet0/0/2] quit
[Switch] interface gigabitethernet 0/0/3
[Switch-GigabitEthernet0/0/3] port link-type hybrid
[Switch-GigabitEthernet0/0/3] port hybrid pvid vlan 10
[Switch-GigabitEthernet0/0/3] port hybrid untagged vlan 10
[Switch-GigabitEthernet0/0/3] quit

Enable MLD snooping globally and in VLAN 10.
# Enable MLD snooping globally.
```
[Switch] mld-snooping enable
```
# Enable MLD snooping in VLAN 10.
```
[Switch] vlan 10
[Switch-vlan10] mld-snooping enable
[Switch-vlan10] quit
```

Configure a static router port.

[Switch] interface gigabitethernet 0/0/3
[Switch-GigabitEthernet0/0/3] mld-snooping static-router-port vlan 10
[Switch-GigabitEthernet0/0/3] quit

Configure a static member port.

[Switch] interface gigabitethernet 0/0/1
[Switch-GigabitEthernet0/0/1] mld-snooping static-group ff16::1 vlan 10
[Switch-GigabitEthernet0/0/1] mld-snooping static-group ff16::2 vlan 10
[Switch-GigabitEthernet0/0/1] mld-snooping static-group ff16::3 vlan 10
[Switch-GigabitEthernet0/0/1] quit
[Switch] interface gigabitethernet 0/0/2
[Switch-GigabitEthernet0/0/2] mld-snooping static-group ff16::4 vlan 10
[Switch-GigabitEthernet0/0/2] mld-snooping static-group ff16::5 vlan 10
[Switch-GigabitEthernet0/0/2] quit

Verify the configuration.

# Check the router port on the Switch.

[Switch] display mld-snooping router-port
 Total Number of Router Port on VLAN 10 is 1
   Port Name             UpTime          Expires         Flags
   GE0/0/3               00:00:06        --              STATIC

The command output shows that GE0/0/3 has become a static router port.

# Check the member port on the Switch.

[Switch] display mld-snooping port-info vlan 10
--------------------------------------------------------------------------------
                             (Source, Group)  Port                          Flag
                             Flag: S:Static    D:Dynamic
--------------------------------------------------------------------------------
VLAN 10, 5 Entry(s)                                                            
                     (*, ff16:0:0:0:0:0:0:1)  GE0/0/1                      S--
                                                          1 port(s)
                     (*, ff16:0:0:0:0:0:0:2)  GE0/0/1                      S--
                                                          1 port(s)
                     (*, ff16:0:0:0:0:0:0:3)  GE0/0/1                      S--
                                                          1 port(s)
                     (*, ff16:0:0:0:0:0:0:4)  GE0/0/2                      S--
                                                          1 port(s)
                     (*, ff16:0:0:0:0:0:0:5)  GE0/0/2                      S--
                                                          1 port(s)
--------------------------------------------------------------------------------

The command output shows that GE0/0/1 on the Switch joins multicast groups FF16::1 to FF16::3 and GE0/0/2 on the Switch has joined multicast groups FF16::4 to FF16::5.

# Check the Layer 2 forwarding table on the Switch.

[Switch] display mld-snooping forwarding-table vlan 10
VLAN ID : 10, Forwarding Mode : IP                                         
--------------------------------------------------------------------------------
                     (Source, Group)     Interface                  Out-Vlan
--------------------------------------------------------------------------------
                         Router-port     GigabitEthernet0/0/3          10
               (*, ff16:0:0:0:0:0:0:1)   GigabitEthernet0/0/1          10
                                         GigabitEthernet0/0/3          10
               (*, ff16:0:0:0:0:0:0:2)   GigabitEthernet0/0/1          10
                                         GigabitEthernet0/0/3          10
               (*, ff16:0:0:0:0:0:0:3)   GigabitEthernet0/0/1          10
                                         GigabitEthernet0/0/3          10
               (*, ff16:0:0:0:0:0:0:4)   GigabitEthernet0/0/2          10
                                         GigabitEthernet0/0/3          10
               (*, ff16:0:0:0:0:0:0:5)   GigabitEthernet0/0/2          10
                                         GigabitEthernet0/0/3          10
--------------------------------------------------------------------------------
Total Group(s) : 5

The command output shows that multicast groups FF16::1 to FF16::5 have generated the forwarding table on the Switch.

Configuration Files

Switch configuration file

#
sysname Switch
#
vlan batch 10
#
mld-snooping enable
#
vlan 10
 mld-snooping enable
#
interface GigabitEthernet0/0/1
 port link-type hybrid
 port hybrid pvid vlan 10
 port hybrid untagged vlan 10
 mld-snooping static-group ff16:0:0:0:0:0:0:1 vlan 10 
 mld-snooping static-group ff16:0:0:0:0:0:0:2 vlan 10 
 mld-snooping static-group ff16:0:0:0:0:0:0:3 vlan 10 
#
interface GigabitEthernet0/0/2
 port link-type hybrid
 port hybrid pvid vlan 10
 port hybrid untagged vlan 10
 mld-snooping static-group ff16:0:0:0:0:0:0:4 vlan 10 
 mld-snooping static-group ff16:0:0:0:0:0:0:5 vlan 10 
#
interface GigabitEthernet0/0/3
 port link-type hybrid
 port hybrid pvid vlan 10
 port hybrid untagged vlan 10
 mld-snooping static-router-port vlan 10 
#
return