IS-IS on FRR - Is Anyone Running It?

Saku Ytti saku at
Mon Apr 6 09:48:14 UTC 2020

On Mon, 6 Apr 2020 at 12:43, Mark Tinka <mark.tinka at> wrote:

> Hello Padding is disabled by default in our IS-IS core, so the other
> side isn't doing it already.
> The problem you have is IS-IS on FreeBSD won't initialize because it
> sees the physical interface running at 9,000 bytes, and yet its code can
> only go up to 8,192 bytes.

Ok, and because this particular FRR VM does more than just ISIS, you
want the extra mtu between 9k and 8192?

Change MTU after starting ISIS? :>


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