[FROG] FRR "overlooks" creation of kernel routes (on linux) - how to debug?

[Donald Sharp]

I'm glad you were able to find the `debug zebra kernel` option.

Why do we need to handle NLM_F_DUMP_INTR in normal operations?  There is no
dump commands being given except on startup

donald

On Fri, Mar 25, 2022 at 1:05 PM Eugene Crosser <crosser at average.org> wrote:

> On 25/03/2022 15:38, Eugene Crosser wrote:
>
> > It looks
> > like netlink messages NEWROUTE and DELROUTE are never seen by zebra
> > process,
>
> It looks like I was enabling wrong debug options: I see that they are
> received by the process (with `debug zebra kernel`)
>
> I think that I have something to work with now. Will update when I find
> what is not working.
>
> By the way one thing that is very probably missing in the zebra code is
> handling of NLM_F_DUMP_INTR flag in nlhdr. If it is not checked, result
> of "dump" (bulk read of all routes, for example) will be occasionally
> inconsistent. Apparently zebra only does that at startup. Still, not a
> good thing.
>
> Regards
>
> Eugene
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