DVMRP protocol operation begins with all configuration parameters defaulting to values that are reasonable for most links within a site.

DVMRP Interfaces field: Specifies if DVMRP is running on the interface.

Range: on/off
Default: off

Apply button: Applies the parameters on the current page to the running system.
Threshold field: The minimum IP time to live (TTL) required for a multicast datagram to be forwarded. It is used administratively to control the scope of multicast datagrams. Note that the TTL of forwarded packets is only compared to the threshold, it is not decremented by the threshold. Every multicast router decrements the TTL by 1. The packet is forwarded only if the TTL of the packet is greater than the threshold set for the outbound port.

Options: When connecting to the Internet Multicast Backbone (MBONE), the following values are recommended:

TTL Interface Type
1 Link within a site
32 Site boundary
64 Regional boundary
128 Continental boundary

Default: 1

Rate Limit (kb/sec) field: a bandwidth limit for all multicast traffic forwarded along the interface link. The rate limit value is specified in units of kilobits per second. Note: this feature is not supported in the current release.

Default: 0, which represents the special case of no rate limit.

Metric field: The cost associated with sending a datagram on the interface. It may be used to influence the choice of routes. A less expensive interface (smaller metric) will be preferred to a more expensive interface (larger metric). Note that metrics should be kept as small as possible.

Range: 1-31
Default: 1