Local-Only Virtual Routers

Local-only Virtual Router (VR) functionality allows for separate logical IP lookup tables on switches that do not have hardware-based VR support, to be used only for IP packets to or from the switch's local IP addresses. Local-only user-created VRs allow for different gateways for routes to a host or subnet, based on the local VLANs on the switch.

Local-only VRs allow bidirectional monitoring of each individual path used to reach the switch itself, where each path may traverse, for example, a different firewall. Switches that support local-only VRs do not forward IP packets in local-only VRs in software or in hardware; they instead use separate lookup tables, including static routes, for packets to or from the switch's local IP addresses.

Supported Platforms

ExtremeSwitching X440-G2 and X620 series switches and stacks with these switches.

Limitations

  • IP forwarding is not permitted on local-only VRs, or on VLANs belonging to local-only VRs.

  • Local-only VRs default to having IP route compression disabled. Enabling IP route compression produces an error.

Changed CLI Commands

Changes are underlined.

create virtual-router vr-name local-only {type vrf {{vr} parent-vr-name}}

The following show command has a new "L" flag to signify local-only VRs.

show virtual-router