When deploying VLT, consider the following best practices:
- Both VLT peers require the same SmartFabric OS10 version within the production environment; however, a mismatch in versions is acceptable during the upgrade procedure.
- Backup destination, or heartbeat connectivity, is recommended through the management network.
- Enable spanning tree protocol to avoid unintentional loops in the network.
- Configure identical vlt-mac on both VLT peers to avoid VLT port-channel flap during failure scenarios, such as VLTi flap and node reboot.
- Increase the delay restore timer in a scaled VLAN configuration.
- Always deploy more than one link for the VLTi port-channel.
- Implement dynamic LACP for VLT port-channels.
- Implement VLT nodes as the root bridge and the backup root bridge.
- Use the default active/active VRRP mode in VLT-VLANs.
- Configure symmetrical configurations on VLT port-channels and VLT-VLANs on both VLT nodes.
- Identify and correct any mismatches reported by the show vlt mismatch command.
- For high availability, connect VLT port-channels to the access nodes. Orphan ports that are connected directly to servers or switches will fail if the connected node goes down.