Administrator Guide

PIM-Sparse Mode Configuration Example
The following sample configuration shows how to configure the PIM Sparse mode designated router functionality on the VLT domain with
two VLT port-channels that are members of VLAN 4001.
For more information, refer to PIM-Sparse Mode Support on VLT.
Examples of Configuring PIM-Sparse Mode
The following example shows how to enable PIM multicast routing on the VLT node globally.
VLT_Peer1(conf)#ip multicast-routing
The following example shows how to enable PIM on the VLT port VLANs.
VLT_Peer1(conf)#interface vlan 4001
VLT_Peer1(conf-if-vl-4001)#ip address 140.0.0.1/24
VLT_Peer1(conf-if-vl-4001)#ip pim sparse-mode
VLT_Peer1(conf-if-vl-4001)#tagged port-channel 101
VLT_Peer1(conf-if-vl-4001)#tagged port-channel 102
VLT_Peer1(conf-if-vl-4001)#no shutdown
VLT_Peer1(conf-if-vl-4001)#exit
The following example shows how to configure the VLTi port as a static multicast router port for the VLAN.
VLT_Peer1(conf)#interface vlan 4001
VLT_Peer1(conf-if-vl-4001)#ip igmp snooping mrouter interface port-channel 128
VLT_Peer1(conf-if-vl-4001)#exit
VLT_Peer1(conf)#end
The following example shows how to repeat these steps on VLT Peer Node 2.
VLT_Peer2(conf)#ip multicast-routing
VLT_Peer2(conf)#interface vlan 4001
VLT_Peer2(conf-if-vl-4001)#ip address 140.0.0.2/24
VLT_Peer2(conf-if-vl-4001)#ip pim sparse-mode
VLT_Peer2(conf-if-vl-4001)#tagged port-channel 101
VLT_Peer2(conf-if-vl-4001)#tagged port-channel 102
VLT_Peer2(conf-if-vl-4001)#no shutdown
VLT_Peer2(conf-if-vl-4001)#ip igmp snooping mrouter interface port-channel 128
VLT_Peer2(conf-if-vl-4001)#exit
VLT_Peer2(conf)#end
Verifying a VLT Configuration
To monitor the operation or verify the configuration of a VLT domain, use any of the following show commands on the primary and
secondary VLT switches.
• Display information on backup link operation.
EXEC mode
show vlt backup-link
• Display general status information about VLT domains currently configured on the switch.
EXEC mode
show vlt brief
• Display detailed information about the VLT-domain configuration, including local and peer port-channel IDs, local VLT switch status,
and number of active VLANs on each port channel.
EXEC mode
show vlt detail
• Display the VLT peer status, role of the local VLT switch, VLT system MAC address and system priority, and the MAC address and
priority of the locally-attached VLT device.
EXEC mode
show vlt role
Virtual Link Trunking (VLT)
877