One bird VM (HA cluster) or two bird VMs (iBGP).

[Mike Neo]

Assuming that these will be two Ubuntu VMs with Bird iBGP/eBGP + VRRP, on
different hosts, outside the HA cluster and additionally with a passthrough
network card for each VM, then in fact it should be no different from two
physical routers, also in terms of performance, and in fact gives greater
maintenance possibilities, right?

Kind regards,
Mike

śr., 26 lut 2025 o 19:19 Bernd Naumann <bernd at kr217.de> napisał(a):

> Yes, two VMs is the way. But "nothing is wrong" with a "HA" foobar
> feature of a Cluster. Sure it depends what the Cluster will actually do
> and how it will behave, and maybe /I/ would not trust VMware, but with
> ganeti we wanted to bring up certain VMs up on a different node as soon
> as possible.
> Also virtual Routers are not bad at all. Depends on their function.
> We had a couple of x86 boxes at the edge but internally (VPN VM; Tenent
> Gateways) were all running as a KVM VM. Which is also nice because if
> your Cluster supports "migrating" then you can even move around a VM in
> case you need to do hardware maintenance or just applying a kernel update.
>
> Good luck,
> Bernd
>
>
> On 26.02.25 6:53 PM, Alarig Le Lay via Bird-users wrote:
> > I completely agree. I wouldn’t try to rely on something as shady as
> > virtualisation “HA” when something as simple as iBGP and VRRP is
> > available. I would even try to put my routers outside of any VM.
> >
> > On Wed 26 Feb 2025 19:23:27 GMT, Volodymyr Pidgornyi wrote:
> >> Hi.
> >>
> >> You would not install single bird instance on vmware HA cluster since
> >> you'll get sessions flaps when instance restart on falures. Right way
> is
> >> to run two different instances on different cluster nodes with HA
> >> deactivated for these instances and setup sessions from each bird
> instance.
> >>
> >> 26.02.2025 19:11, Mike Neo:
> >>> Hi,
> >>> I have one global operator and one IX via BGP and I'm wondering
> >>> whether to set up one bird VM based on vmware HA cluster or two bird
> >>> VMs without vmware HA cluster but located on separate nodes and
> >>> connected via iBGP.
> >>>
> >>> Of course, the iBGP connection allows for easy bird/VM updates but may
> >>> generate potential problems with iBGP and VRRP. However, if there is
> >>> one bird VM based on the vmware HA cluster, then in the event of a
> >>> node failure, it is necessary to wait until the machine is restarted
> >>> on the second node and until the prefixes from peers are loaded.
> >>>
> >>> What are your experiences with this?
>
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