Re: frr mailing list

[William Herrin via NANOG <nanog () lists nanog org>]

On Thu, Jan 15, 2026 at 10:03 AM Randy Bush via NANOG
<nanog () lists nanog org> wrote:
> who is deep on debian, esp trixie, networking with frr?
>
> anyone get vrrp working in trixie? i have been running it in bookworm
> for a long time. but trixie `/etc/network/interfaces` does not accept my
> bookwormish config which is
>
>     iface eno1
>         vrrp 6 198.180.150.126/25 2001:418:8006::126/64
>
> but trixie complains as follows
>
>     Jan 15 02:06:26 r0.dfw.rg.net ifdown[2990]: ifdown: /etc/network/interfaces:31: unknown or no method and no 
> inherits keyword specified
>     Jan 15 02:06:26 r0.dfw.rg.net ifdown[2990]: ifdown: couldn't read interfaces file "/etc/network/interfaces"

Hi Randy,

/etc/network/interfaces has nothing to do with FRR. I'd try a Debian forum.

Taking a stab in the dark: have you installed the ifupdown2 package or
are you using the ifupdown package? ifupdown doesn't support the vrrp
keyword.


FWIW, I get an identical error message from Bookworm. "iface
something" without a method such as static or manual gives that error.

AFAICT, the "vrrp" keyword is unhandled by ifupdown, so its presence
in /etc/network/interfaces should be a noop.

What results do you get from:
ifconfig eno1
ip -6 link show eno1
ip -6 addr show eno1

I don't use VRRP on Debian so unfortunately I may not be able to help
you directly. There does appear to be support for it in keepalived
that doesn't appear to touch /etc/network/interfaces. Intuitively, I
would expect the /etc/network/interfaces configuration to bring up the
non-vrrp configuration on the interface while whatever you use to
manage VRRP handles the VRRP details.

Regards,
Bill Herrin

-- 
For hire. https://bill.herrin.us/resume/
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