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Date:      Sat, 4 Dec 2021 18:03:29 +0100
From:      Kurt Jaeger <pi@freebsd.org>
To:        "Bjoern A. Zeeb" <bz@freebsd.org>
Cc:        freebsd-net@freebsd.org
Subject:   Re: why multi-hop icmp redirects to 0.0.0.0 on 13.0 ?
Message-ID:  <YaufYWCM9YOUG5Op@fc.opsec.eu>
In-Reply-To: <alpine.BSF.2.00.2112041633090.68830@ai.fobar.qr>
References:  <Yast8d1dRd7ZFWr3@fc.opsec.eu> <alpine.BSF.2.00.2112041609520.68830@ai.fobar.qr> <YauV138P1xyB53Ja@fc.opsec.eu> <alpine.BSF.2.00.2112041633090.68830@ai.fobar.qr>

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Hi!

> > rtr1 runs frr, has full route, either with or without default route.
> 
> If that makes no difference then something else is wrong.

I agree, but we have to find out, what is wrong...

> > > (b) At the time this happens does rtr1 have a route to z.z.z.z ?
> > >     route -4 get z.z.z.z

> > Yes.
> 
> And that is not pointing back to the interface rtr2 is on but out
> on an interface towards inet?

Technically, some of the routes point out to the same interface,
but a different IP (like x.x.x.5), and some point out to the wan interface.

Here's the small network layout again:

inet ------ wan:rtr1:lan ------ rtr2 ------ wan:host
                     x.x.x.1                y.y.y.1

-- 
pi@FreeBSD.org         +49 171 3101372                  Now what ?



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