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

[Ailton Soares]

Hello,

What's the bird version are you using ?

The Bird version 3 is in alpha 0, isn't production usable yet. If you like to test, you can download it on https://bird.network.cz/?download

Best regards,

Ailton

NIC.br/IX.br
Brasil Internet Exchange


Em 19/04/2023 02:19, saifullah at fiberathome.net escreveu:
> Hi
> 
> CPU MHz: 2494.140. I found the BIRD is using different CPU at different time and it’s crossing 100% utilization using command “htop”. It’s happening when I am trying to establish a neighbor where prefix count is more than 106K. I found that BIRD3 support multi-core. Is there any way to install BIRD 3?
> 
> Thanks & Regards
> 
> Abu Nasar Md. Saifullah
> 
> *From:* Darshan Kowlaser <darshan at darshankowlaser.com>
> *Sent:* Tuesday, April 18, 2023 11:00 PM
> *To:* saifullah at fiberathome.net
> *Subject:* Re: BIRD is taking too much time to converge 106362 prefixes from a non-client iBGP neighbor
> 
> Hi
> 
> Something to consider is that BGP on BIRD runs on a single core. If you slow clock speed you are going to run into issues? What is the CPU utilization while the BIRD daemon stopped?
> 
> On Tue, Apr 18, 2023 at 6:18 PM <saifullah at fiberathome.net <mailto:saifullah at fiberathome.net>> wrote:
> 
>     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 <mailto:santiago at crfreenet.org>>
>     Sent: Monday, April 17, 2023 6:17 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: 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 <mailto: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 <mailto:santiago at crfreenet.org>) OpenPGP encrypted
>     e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net <http://wwwkeys.pgp.net>) "To err is human -- to
>     blame it on a computer is even more so."
> 
>     Connecting our future with light
> 
> 
> 
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