This integer, from 1 to 32, sets the administrative distance metric used when calculating distance vectors for a configured DVMRP summary address. An admin adjusts this to control how attractive a manually summarized route appears to DVMRP neighbors relative to more specific routes. Leaving it at the default of 1 makes the summary route highly preferred, while raising it to 16 makes neighbors favor a more specific route over the summary when both are available.