Bird and cpu clock / cores.

[Alarig Le Lay]

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.
> >