Bird and cpu clock / cores.

[Mike Neo]

@Maria Matejka <maria.matejka at nic.cz>
What are your recommendations?

pon., 3 lis 2025 o 18:53 Alarig Le Lay <alarig at swordarmor.fr> napisał(a):

> I would use 4x3.8 in that case, without HT.
> But for VRRP I don’t see the point, bird doesn’t implement it.
>
> On Sun 02 Nov 2025 22:14:17 GMT, Mike Neo wrote:
> > Hello!
> > I need to configure a simple BGP router to support 1-2 full BGP peers and
> > one IX peer.
> > The total traffic supported is 1-2 Gbps.
> >
> > I'm planning two BGP routers based on Ubuntu + Bird (version 2 or 3).
> > Each router has two Intel X520-DA2 cards, one CPU, and 32GB of RAM.
> >
> > I'm considering:
> >
> > 1. CPU:
> > - 8x2.2 GHz or 4x3.8 GHz, or maybe something else?
> > - should I run HT or not?
> > 2. Architecture: iBGP + VRRP or VRRP only?
> > 3. Which Bird version?
> >
> > Anything else I should think about?
> >
> > Kind regards,
> > Mike
> >
> > niedz., 2 lis 2025 o 16:20 Maria Matejka <maria.matejka at nic.cz>
> napisał(a):
> >
> > > Hello!
> > >
> > > On Sun, Nov 02, 2025 at 07:05:42AM +0100, Mike Neo wrote:
> > >
> > > As far as I understand it, BIRD 3 implements multithreading by allowing
> > > different protocol instances or routing tables to run on separate
> worker
> > > threads, but each individual bgp protocol instance itself still
> operates
> > > mostly in a single-threaded manner. Right?
> > >
> > > Yes, every individual bgp protocol instance indeed runs in a single
> > > thread, and there is no good reason to split it because most of the
> time
> > > it’s the network which is slower than BGP.
> > >
> > > If you run just several bgp instances, you don’t need to care about the
> > > performance at all, even if you load a full table from all of them.
> > >
> > > As soon as you start running many bgp instances, you may use more
> threads.
> > > Yet, in the end it may be best to say what is your expected load and
> we may
> > > then tell you what may be the performance chokepoints and how many
> threads
> > > may work for you.
> > >
> > > Have a nice day!
> > > Maria
> > >
> > > –
> > > Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.
> > >
>
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