# Enabling DVMRP on a Virtual Router

By default, DVMRP is enabled on the router. To enable DVMRP on a VR:

1. Enable multicast routing.
   host1(config)#ip multicast-routing
2. (Optional) Create a VR or access a VR context.
   host1(config)#virtual-router boston

   | Note: If you do not specify a VR, you can configure DVMRP on the default router.

You must enable and configure DVMRP on one or more interfaces for DVMRP to function. See Activating DVMRP on an Interface. You can also set DVMRP limits for the VR; see Configuring DVMRP Limits.