Reference Guide

Virtual Link Trunking (VLT) | 307
In the following sample VLT configuration steps, VLT peer 1 is S4810-2, VLT peer 2 is S4810-4, and the
ToR is S60-1:
Configure the VLT domain with the same ID in VLT peer 1 and VLT peer 2
s4810-2(conf)#vlt domain 5
s4810-2(conf-vlt-domain)#
s4810-4(conf)#vlt domain 5
s4810-4(conf-vlt-domain)#
Configure the VLTi between VLT peer 1 and VLT peer 2:
1. LACP/Static LAG can be configured between the peer units (not shown)
2. Configure the peer-link port-channel in the VLT domains of each peer unit.
s4810-2(conf)#interface port-channel 1
s4810-2(conf-if-po-1)#channel-member TenGigabitEthernet 0/4-7
s4810-2(conf)#no shutdown
s4810-4(conf)#interface port-channel 1
s4810-4(conf-if-po-1)#channel-member TenGigabitEthernet 0/4-7
s4810-4(conf)#no shutdown
Configure the backup link between the VLT peer units.
1. Configure the peer 2 management ip/ interface ip for which connectivity is present in VLT peer 1.
2. Configure the peer 1 management ip/ interface ip for which connectivity is present in VLT peer 2.
s4810-2#show running-config vlt
!
vlt domain 5
peer-link port-channel 1
back-up destination 10.11.206.58
s4810-2#
s4810-2#show interfaces managementethernet 0/0
Internet address is 10.11.206.43/16
s4810-4#show running-config vlt
!
vlt domain 5
peer-link port-channel 1
back-up destination 10.11.206.43
s4810-4#
s4810-4#show running-config interface managementethernet 0/0
ip address 10.11.206.58/16
no shutdown
Configure the VLT links between VLT peer 1 and VLT peer 2 to the top of rack unit. In the following example,
port Te 0/40 in VLT peer 1 is connected to Te 0/48 of TOR and port Te 0/18 in VLT peer 2 is connected to
Te 0/50 of TOR.
1. Configure the static LAG/LACP between ports connected from VLT peer 1 and VLT peer 2 to the top
of rack unit.
2. Configure the VLT peer link port channel id in VLT peer 1 and VLT peer 2.
Note: If a third-party ToR unit is used, Dell Networking recommends using static LAGs with VLT peers to
avoid potential problems if the VLT peers are rebooted.