no auto summary BGP

[Mukesh]

Hi all

I can't issue the following command. 

no auto summary command under router bgp 65000 

conf t

router bgp 65000 

no auto summary

it goes under address-family ipv4 will that be an issue? 

address-family ipv4
no auto summary

[balaji.bandi]

depends on use case :

auto-summary (BGP)

To configure automatic summarization of subnet routes into network-level routes, use the auto-summary command in address family or router configuration mode. To disable automatic summarization and send subprefix routing information across classful network boundaries, use the no form of this command.

auto-summary 

no auto-summary

Since  BGP can support multi-protocol you can use address-family ipv4 (unicast or Multicast)

[Harold Ritter · Accepted solution]

Hi @Mukesh  ,

"no auto-summary" has been the default behavior for BGP for years now, so no need to configure it.

Regards,

[M02@rt37]

Hello @Mukesh ,

Auto-summary behavior has changed across Cisco IOS software releases. Initially, auto-summary was enabled by default. However, with Cisco bug ID CSCdu81680 this behavior has changed. In the latest Cisco IOS, auto-summary is disabled by default.