Configuring DVMRP Limits

You can configure DVMRP and IGMP on the same interface. If you configure DVMRP and IGMP on an interface, the router determines that DVMRP owns the interface.

Note: You cannot configure DVMRP and PIM on the same interface.

When you have enabled DVMRP processing on a VR, you can configure the following settings for that VR:

• Configuring the Number of Routes that the Virtual Router Records in Warnings
• Configuring the Maximum Number of DVMRP Routes That the Router Advertises

Configuring the Number of Routes that the Virtual Router Records in Warnings

The following steps describe how you can set the number of DVRMP routes that the router can record before it generates a system log warning message. The warning alerts you so you can identify routers that are injecting large numbers of routes into the MBone.

To configure the number of routes that the router can record before it generates a system log warning message:

• Issue the ip dvmrp route-hog-notification command in Global Configuration mode.
  host1:boston(config)#ip dvmrp route-hog-notification 5000

  Use the no version to restore the default value, 10,000 routes.

Configuring the Maximum Number of DVMRP Routes That the Router Advertises

To limit the number of routes that the router can advertise on each interface:

• Issue the ip dvmrp route-limit command in Global Configuration mode.
  host1:boston(config)#ip dvmrp route-limit 5000

  Use the no version to restore the default value, 7000 routes.

Related Documentation

• DVMRP Overview
• ip dvmrp route-hog-notification
• ip dvmrp route-limit