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multicast peer-routing timeout value command. You can configure an optimal time for a VLT
node to retain synced multicast routes or synced multicast outgoing interface (OIF), after a VLT peer
node failure, through the multicast peer-routing-timeout command in VLT DOMAIN mode. Using
the bootstrap router (BSR) mechanism, both the VLT nodes in a VLT domain can be configured as the
candidate RP for the same group range. When an RP fails, the VLT peer automatically takes over the role
of the RP. This phenomenon enables resiliency to be achieved by the PIM BSR protocol.
Configuring VLAN-Stack over VLT
To configure VLAN-stack over VLT, follow these steps.
1. Configure the VLT LAG as VLAN-stack access or trunk mode on both the peers.
INTERFACE PORT-CHANNEL mode
vlan-stack {access | trunk}
2. Configure VLAN as VLAN-stack compatible on both the peers.
INTERFACE VLAN mode
vlan-stack compatible
3. Add the VLT LAG as a member to the VLAN-stack on both the peers.
INTERFACE VLAN mode
member port-channel port—channel ID
4. Verify the VLAN-stack configurations.
EXEC Privilege
show running-config
Sample configuration of VLAN-stack over VLT (Peer 1)
Configure VLT domain
Dell(conf)#vlt domain 1
Dell(conf-vlt-domain)#peer-link port-channel 1
Dell(conf-vlt-domain)#back-up destination 10.16.151.116
Dell(conf-vlt-domain)#primary-priority 100
Dell(conf-vlt-domain)#system-mac mac-address 00:00:00:11:11:11
Dell(conf-vlt-domain)#unit-id 0
Dell(conf-vlt-domain)#
Dell#show running-config vlt
!
vlt domain 1
peer-link port-channel 1
back-up destination 10.16.151.116
primary-priority 100
system-mac mac-address 00:00:00:11:11:11
unit-id 0
Dell#
Virtual Link Trunking (VLT)
993