Users Guide

Congure VLT
Verify that both VLT peer devices are running the same operating system version. For VRRP operation, congure VRRP groups and L3
routing on each VLT peer.
Congure the following settings on each VLT peer device separately:
1 To prevent loops in a VLT domain, Dell EMC Networking recommends enabling STP globally using the spanning-tree mode
command. Enabling STP prevents accidental loops that faulty wiring causes.
2 Create a VLT domain by conguring the same domain ID on each peer using the vlt-domain command.
3 (Optional) To override the default VLT primary election mechanism based on the system MAC addresses of the VLT nodes, congure
a VLT node priority for each of the VLT nodes using the primary-priority command. Enter a lower priority value for the desired
primary VLT peer and a higher priority value for the desired secondary VLT peer.
NOTE: If a VLT peer is reloaded, it automatically becomes the secondary peer regardless of the VLT primary-priority
setting.
4 Congure VLTi interfaces with the no switchport command.
5 Congure the VLTi interfaces on each peer using the discovery-interface command. After you congure both sides of the
VLTi, the primary and secondary roles in the VLT domain are automatically assigned if primary priority is not congured.
6 (Optional) Manually recongure the default VLT MAC address. Congure the same VLT MAC address in both VLT peers. The manual
conguration minimizes the time required to synchronize the default MAC address of the VLT domain on both peer devices when one
peer switch reboots.
7 (Optional) Congure a nondefault time interval to delay bringing up VLT ports in the secondary VLT peer after reload or when VLTi
comes up after a shutdown or failure. The default time interval is 90 seconds.
8 Congure the VLT heartbeat backup link using the backup destination {ip-address | ipv6 ipv6–address } [vrf
management]
[interval interval-time] command.
9 Congure VLT port channels between VLT peers and an attached device using the vlt-port-channel command. Assign the
same VLT port channel ID from 1 to 128 to interfaces on dierent peers that you bundle together. The peer interfaces appear as a
single VLT port channel to downstream devices.
10 Connect peer devices in a VLT domain to an attached access device or server.
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Virtual Link Trunking