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Cisco IOS in a Nutshell, 2nd Edition by James Boney

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Name

auto-summary — router

Synopsis

auto-summary
no auto-summary

Configures

RIP (Version 2), EIGRP, BGP route summarization

Default

Enabled

Description

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.

Example

The following configuration disables auto-summary for an EIGRP routing process:

router eigrp 110
  network 10.0.0.0
  no auto-summary

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