IP Classless

Router(config)#ip classless

Instructs IOS to forward packets destined for an unknown subnet to the best supernet route

Router(config)#no ip classless

Turns off the ip classless command


A supernet route is a route that covers a range of subnets with a single entry.


The ip classless command is enabled by default in Cisco IOS Software Release 11.3 and later.

CCNA Self-Study(c) CCNA Portable Command Guide
CCNA Portable Command Guide
ISBN: 1587201585
EAN: 2147483647
Year: 2006
Pages: 261
Authors: Scott Empson

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