OS10 Enterprise Edition User Guide Release 10.4.1.0

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Configure VLT

Verify that both VLT peer devices are running the same software version. For VRRP operation, configure VRRP groups and L3 routing on each VLT peer. To configure VLT and create a VLT domain where two devices are physically connected and provide a single port-channel connection to access devices, configure settings on each VLT peer device.

  1. To prevent loops in VLT domain, enable the STP globally ( spanning-tree mode {rstp | rapid-pvst} command). RSTP and RPVST+ modes are supported on VLT ports.
  2. Create a VLT domain by configuring the same domain ID on each peer ( vlt-domain command).
  3. (Optional) To override the default VLT primary election mechanism based on the system MAC addresses of the VLT nodes, configure 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.
  4. Configure the VLT interconnect interfaces on each peer ( discovery-interface command). After you configure both sides of the VLTi, the primary and secondary roles in the VLT domain are automatically assigned if primary priority is not configured.
  5. (Optional) Manually reconfigure the default VLT MAC address. Configure the VLT MAC address in both the VLT peers.
  6. (Optional) Configure a time interval to delay bringing up VLT ports after reload or peer-link restoration between the VLT peer switches.
  7. Configure the VLT backup link used for heartbeat timers ( backup destination { ip-address | ipv6 ipv6–address } [vrf management] [interval interval-time] command).
  8. Configure VLT port-channels between VLT peers and an attached device ( vlt-port-channel command). Assign the same VLT port-channel ID from 1 to 1024 to interfaces on different peers that you bundle together so that peer interfaces appear as a single VLT LAG to downstream devices.
  9. Connect peer devices in a VLT domain to an attached access device or server.

sample vlt configuration


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