VSX solution requirements

  • All VSX switches in your environment must have identical settings for the following:

    • The VLAN membership for all VSX trunk ports.

    • The loop-protection configuration on a VLAN that is part of a VSX LAG.
  • Mutually exclusive features:

    • VSX active-forwarding and VSX active-gateway

    • VSX active-gateway and VRRP

    • VSX and MVRP

    • VSX and RPVST

  • Profiles for 832x series switches: All switches must be assigned either in profile L3-agg or L3-core.

  • Support for Inter-Switch links (ISLs): VSX LAG does not support layer 3 processing, such as a routed port; however, multiple Virtual Switch Interfaces (VSI) can be configured on the switch in association with the VLANs carried over the given VSX LAG.

  • Support for Layer 3: A VSX LAG as a route only port is not supported. To enable Layer 3, create an SVI associated to a given VLAN that is enabled on the VSX LAG.

  • VLAN support: The same VLAN must be supported on both switches because the ISL is automatically made a member of all VLANs created on the switch. The VSX solution synchronizes the VLANs on the secondary VSX switches.

  • VSX active-forwarding with BFD is not supported.

  • VSX switches and software versions: Both VSX peer switches must use the same software version in most situations; however during an upgrade, one switch can run a different version than the peer with some limitations, such as no VSX synchronication support.