Maipu Administration Guide

Configure MLD Basic Functions Example

Network Requirements

The whole network runs the IPv6 PIM-SM protocol.
Device1, Device2, and Receiver are in the same LAN and Device1 is the querier.
Receiver is one receiver of Device1 and Device2 stub network.
Run MLDv2 between Device1, Device2 and stub network.

Network Topology

Networking of configuring MLD basic functions

Figure 9-1 Networking of configuring MLD basic functions

Configuration Steps

Step 1: Configure VLAN, and add the port to the corresponding VLAN (omitted).

Step 2: Configure the IPv6 address of the interface (omitted).

Step 3: Globally enable the IPv6 multicast forwarding and enable the multicast protocol IPv6 PIM-SM on the interface. Enable MLD on the interface of Device1 and Device2 connecting the Receiver.

#Configure Device1.

Globally enable the IPv6 multicast forwarding, enable the multicast protocol IPv6 PIM-SM on the related interfaces, and enable MLD on the interface of connecting Receiver.

Device1#configure terminal
Device1(config)#ipv6 multicast-routing
Device1(config)#interface vlan2
Device1(config-if-vlan2)#ipv6 pim sparse-mode
Device1(config-if-vlan2)#exit
Device1(config)#interface vlan4
Device1(config-if-vlan4)#ipv6 pim sparse-mode
Device1(config-if-vlan4)#ipv6 mld enable
Device1(config-if-vlan4)#exit

#Configure Device2.

Globally enable the IPv6 multicast forwarding, enable the multicast protocol IPv6 PIM-SM on the related interfaces, and enable MLD on the interface of connecting Receiver.

Device2#configure terminal
Device2(config)#ipv6 multicast-routing
Device2(config)#interface vlan3
Device2(config-if-vlan3)#ipv6 pim sparse-mode
Device2(config-if-vlan3)#exit
Device2(config)#interface vlan4
Device2(config-if-vlan4)#ipv6 pim sparse-mode
Device2(config-if-vlan4)#ipv6 mld enable
Device2(config-if-vlan4)#exit

Step 4: Check the result.

#View the MLD version information and querier election result of Device1 interface vlan4.

Device1#show ipv6 mld interface vlan4
Interface vlan4 (Index 23) 
 MLD Enabled, Active 
 Querier: fe80::201:2ff:fe03:406 (Self) 
 Default version: 2 
 Querier parameter:  
   Query interval is 125 seconds 
   Querier timeout is 255 seconds 
   Query response time is 10 seconds 
   Last member query response interval is 1 seconds 
   Last member query count is 2  
   Group Membership interval is 260 seconds 
   Robustness variable is 2

#View the MLD version information and querier election result of Device2 interface gigabitethernet0/0/1.

Device2#show ipv6 mld interface vlan4
Interface vlan4 (Index 50331674) 
 MLD Enabled, Active 
 Querier: fe80::201:2ff:fe03:406 
 Non-Querier: fe80::201:7aff:febc:662b Expires: 00:04:07 
 Default version: 2 
 Querier parameter:  
   Query interval is 125 seconds 
   Querier timeout is 255 seconds 
   Query response time is 10 seconds 
   Last member query response interval is 1 seconds 
   Last member query count is 2  
   Group Membership interval is 260 seconds 
   Robustness variable is 2

# Receiver sends the MLDv2 member report packet to add to multicast group FF1E::1.

# View the multicast member table of Device1.

Device1#show ipv6 mld groups  
MLD Connected Group Membership
Total 1 Connected Groups 
Group     Interface    Uptime    Expires  V1-Expires Last Reporter
ff1e::1   vlan4        00:00:02  00:04:17 not used   fe80::b

#View the multicast member table of Device2.

Device2#show ipv6 mld groups
MLD Connected Group Membership
Total 1 Connected Groups 
Group      Interface   Uptime    Expires   V1-Expires Last Reporter
ff1e::1    vlan4       00:00:02  00:04:17  not used   fe80::b

On the interface, run the MLDv2 version, be compatible with the MLDv1 member relation report and MLDv1 member leave packet by default. You can configure the running MLD version of the interface via the command ipv6 mld version.
When multiple devices run MLD in one LAN, elect the MLD querier and the one with the smallest address is elected as the MLD querier of the LAN.