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Configure the VLT domain with the same ID in VLT peer 1 and VLT peer 2
Configure the VLTi between VLT peer 1 and VLT peer 2
Configure the backup link between the VLT peer units.
Configure the VLT links between VLT peer 1 and VLT peer 2 to the top of rack unit.
In the ToR unit, configure LACP on the physical ports
Verify VLT is up. Verify that the VLTi (ICL) link, backup link connectivity (heartbeat status) and VLT peer
link (peer chassis) are all up.
Verify the VLT LAG is up in both VLT peer units.
In the following sample VLT configuration steps, VLT peer 1 is MXL-2, VLT peer 2 is MXL-4, and the ToR is
MXL-1.
NOTE: If you use a third-party ToR unit, Dell Networking recommends using static LAGs with VLT
peers to avoid potential problems if the VLT peers are rebooted.
mxl-2(conf)#vlt domain 5
mxl-2(conf-vlt-domain)#
mxl-4(conf)#vlt domain 5
mxl-4(conf-vlt-domain)#
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.
mxl-2(conf)#interface port-channel 1
mxl-2(conf-if-po-1)#channel-member TenGigabitEthernet 0/4-7
mxl-2(conf)#no shutdown
mxl-4(conf)#interface port-channel 1
mxl-4(conf-if-po-1)#channel-member TenGigabitEthernet 0/4-7
mxl-4(conf)#no shutdown
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.
mxl-2#show running-config vlt
!
vlt domain 5
peer-link port-channel 1
back-up destination 10.11.206.58
mxl-2#
mxl-2#show interfaces managementethernet 0/0
Internet address is 10.11.206.43/16
mxl-4#show running-config vlt
!
vlt domain 5
peer-link port-channel 1
back-up destination 10.11.206.43
mxl-4#
mxl-4#show running-config interface managementethernet 0/0
ip address 10.11.206.58/16
no shutdown
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.
Virtual Link Trunking (VLT)
985