Auto Route Summarisation

The following table summarises how routing protocols behave in relation to route summarisation.

Routing ProtocolRoute Summarisation
RIP version 1N/A
RIP version 2Auto summarise by default
IGRPN/A
EIGRPAuto summarise by default
OSPFNot enabled by default

To disable auto summarisation with RIP version 2 and EIGRP within Cisco IOS, use the no auto-summary command within the config-router Exec command mode.

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