Hello,

the option you want to use is `graceful restart time <number>` as cited from the documentation at https://bird.network.cz/?get_doc&v=20&f=bird-6.html#bgp-graceful-restart-time:

graceful restart time number

The restart time is announced in the BGP Graceful Restart capability and specifies how long the neighbor would wait for the BGP session to re-establish after a restart before deleting stale routes. Default: 120 seconds

And possibly these additional options:

min graceful restart time number

The lower bound for the graceful restart time to override the value received in the BGP Graceful Restart capability announced by the neighbor. Default: no lower bound.

max graceful restart time number

The upper bound for the graceful restart time to override the value received in the BGP Graceful Restart capability announced by the neighbor. Default: no upper bound.

Hope this helps!
David

Hello,

We use BIRD for communication with servers with higher-level switches.

In our config , there is config to set graceful restart like below.

protocol bgp example2 {

        import all;

        export all;

        ...

        graceful restart on;

}

As far as I know, the default value for graceful restart is 120 seconds.

But I don't know how to change this time.

Please give me some advice on this. Thank you.

-- 
David Petera (he/him) | BIRD Tech Support | CZ.NIC, z.s.p.o.