auto-summary — router
auto-summary no auto-summary
RIP (Version 2), EIGRP, BGP route summarization
By default, subnet routes are summarized to “classful” network routes. If you need to advertise subnets across networks, auto-summary must be disabled. To disable auto-summary, use the
no form of this command. For more information, consult Chapter 8.
The following configuration disables auto-summary for an EIGRP routing process:
router eigrp 110 network 10.0.0.0 no auto-summary