BIRD is taking too much time to converge 106362 prefixes from a non-client iBGP neighbor

[saifullah at fiberathome.net]

Hi Dear, 

Thank you for your feedback. The server I am using of 16 VCPU with 2 threads
per CPU and 16 GB RAM. I found that CPU utilizations is crossing 100% in a
CPU. Any way to install and configure BIRD so that it uses all CPU
simultaneously? 


Thanks & Regards
Abu Nasar Md. Saifullah

-----Original Message-----
From: Ondrej Zajicek <santiago at crfreenet.org> 
Sent: Monday, April 17, 2023 6:17 PM
To: saifullah at fiberathome.net
Cc: bird-users at network.cz
Subject: Re: BIRD is taking too much time to converge 106362 prefixes from a
non-client iBGP neighbor

On Thu, Apr 13, 2023 at 11:47:12PM +0600, saifullah at fiberathome.net wrote:
> Hi,
> 
> Thanks for your feedback. The topology is BIRD is connected with total 
> 8 neighbors (1 is non-client and 7 are in client mode) for my setup. 
> The non-client neighbor is actually a high end central RR router which 
> advertise about 106k prefixes to BIRD and with other 7 client, the 
> prefix count is below 100.
> 
> 1. During that time, I have checked and found that CPU load was normal.
> 2. I also checking prefix count using command "show protocols all 
> <non_client_neighbor>" and found prefixes were increasing gradually.

Hi

If CPU was normal (idle), then it is unlikely an issue with BIRD.
Prefixes are processed as they arrive, so they are delayed only if BIRD
cannot catch up and use 100% CPU (note that it is single-threaded, so you
have to check load on individual CPUs and not aggregate load, like is
default in 'top'). Perhaps the other side send prefixes slowly?

--
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org) OpenPGP encrypted
e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to
blame it on a computer is even more so."

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