RE: How to prohibit resetting bgp neighborship after any bgp config change in bird.conf

[Maria Matejka]

Hello! 

Well, of course all BGP sessions get reset when you restart BIRD itself. All the TCP sockets must be reconnected when the BIRD process starts anew.

Or you may use the graceful restart feature to alleviate some of the restarting pain, anyway BIRD is supposed to run long-term so restart is needed only if you upgrade BIRD itself. The standard way to update the config is to reload it, not to restart BIRD.

Maria

On 8 April 2023 17:11:32 CEST, saifullah at fiberathome.net wrote:
>Hello, 
>
> 
>
>Right, thank you for your feedback. Actually if we modify (add/ delete/ change) any address-family then it will reset the corresponding BGP sessions with “birc> configure” or “service bird reload”. But if you restart the service by “service bird restart”, then it will restart all sessions. Seems it is normal behavior. 
>
> 
>
>Thanks
>
>Saifullah 
>
> 
>
> 
>
>From: Maria Matejka <maria.matejka at nic.cz> 
>Sent: Friday, April 7, 2023 6:48 PM
>To: bird-users at network.cz; saifullah at fiberathome.net; 'Budiwijaya' <bbuuddiiww at gmail.com>
>Subject: RE: How to prohibit resetting bgp neighborship after any bgp config change in bird.conf
>
> 
>
>Hello!
>
>If you change bgp protocol parameters or rename your config blocks, it will restart the sessions, no matter what. Most of the knobs need restarting the session anyway, even by RFC.
>
>The "configure soft" works only for filter changes and you should't run BIRD for a long time before actually reloading the affected channels.
>
>We may suggest better if you disclose what you are actually changing.
>
>Maria
>
>On 7 April 2023 14:00:34 CEST, saifullah at fiberathome.net <mailto:saifullah at fiberathome.net>  wrote:
>
>Hi, 
>
> 
>
>This is not working. Any other way? Pls suggest. 
>
> 
>
> 
>
>Thanks & Regards
>
>Saifullah
>
> 
>
>From: Budiwijaya <bbuuddiiww at gmail.com <mailto:bbuuddiiww at gmail.com> > 
>Sent: Friday, April 7, 2023 3:47 PM
>To: saifullah at fiberathome.net <mailto:saifullah at fiberathome.net> 
>Cc: bird-users at network.cz <mailto:bird-users at network.cz> 
>Subject: Re: How to prohibit resetting bgp neighborship after any bgp config change in bird.conf
>
> 
>
>Hi,
>
> 
>
>Using command '#birdc configure soft' from linux command line should not reset any peers.
>
> 
>
>Thank you
>
>Budiwijaya
>
> 
>
> 
>
>On Fri, 7 Apr 2023 at 01:03, <saifullah at fiberathome.net <mailto:saifullah at fiberathome.net> > wrote:
>
>Dear Forum, 
>
>I am new in bird. I am getting a problem. When I am doing "service bird restart or reload" or "bird > configure" to affect any bgp config change, add, modification etc., then bgp neighborships are being reset. Is there any way to affect any configure change in bird.conf without resetting bgp neighborships? 
>
> 
>
>Regards // Saifullah 
>
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