Administrator Guide

Configure VLT LAG as VLAN-Stack Access or Trunk Port
Dell(conf)#interface port-channel 10
Dell(conf-if-po-10)#switchport
Dell(conf-if-po-10)#vlt-peer-lag port-channel 10
Dell(conf-if-po-10)#vlan-stack access
Dell(conf-if-po-10)#no shutdown
Dell#show running-config interface port-channel 10
!
interface Port-channel 10
no ip address
switchport
vlan-stack access
vlt-peer-lag port-channel 10
no shutdown
Dell#
Dell(conf)#interface port-channel 20
Dell(conf-if-po-20)#switchport
Dell(conf-if-po-20)#vlt-peer-lag port-channel 20
Dell(conf-if-po-20)#vlan-stack trunk
Dell(conf-if-po-20)#no shutdown
Dell#show running-config interface port-channel 20
!
interface Port-channel 20
no ip address
switchport
vlan-stack trunk
vlt-peer-lag port-channel 20
no shutdown
Dell#
Configure the VLAN as VLAN-Stack VLAN and add the VLT LAG as members to the VLAN
Dell(conf)#interface vlan 50
Dell(conf-if-vl-50)#vlan-stack compatible
Dell(conf-if-vl-50-stack)#member port-channel 10
Dell(conf-if-vl-50-stack)#member port-channel 20
Dell(conf-if-vl-50-stack)#
Dell#show running-config interface vlan 50
!
interface Vlan 50
vlan-stack compatible
member Port-channel 10,20
shutdown
Dell#
Verify that the Port Channels used in the VLT Domain are Assigned to the VLAN-Stack VLAN
Configure BFD in VLT Domain
Dell EMC Networking OS supports Bidirectional Forwarding Detection (BFD) to detect communication failures on an interface that is a
part of a VLT link aggregation group (LAG).
In VLT domain, BFD provides high availability path when there are communication failures in any one of the VLT LAG links. The VLT nodes
and top of rack (ToR) use the VLT LAG links to carry the BFD packets. When any one of the VLT LAG links connected to the ToR is
down, the BFD packets reach the VLT primary or secondary using the VLTi (ICL) link.
Sample BFD configuration in VLT domain
The following shows the sample configuration of BFD implementation in VLT environment:
1002
Virtual Link Trunking (VLT)