netdev - Re: [PATCH RESEND] ip_gre: sendto/recvfrom NBMA address

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Date:	Wed, 24 Oct 2007 14:08:42 +0400
From:	Alexey Kuznetsov <kuznet@....inr.ac.ru>
To:	Timo Ter?s <timo.teras@....fi>
Cc:	Patrick McHardy <kaber@...sh.net>, davem@...emloft.net,
	netdev@...r.kernel.org
Subject: Re: [PATCH RESEND] ip_gre: sendto/recvfrom NBMA address

Hello!

> I was able to set a nbma gre tunnel, add routes to it and it worked
> perfectly ok.
> 
> Link-level next hop worked:
> ip route add <route> via <link-level-address> dev <tunnel-dev> onlink

This can work if you use gre0. By plain luck it has all-zero dev_addr.

It will break on nbma devices set with:

ip tunnel add XXX mode gre local a.b.c.d [key whatever] ...

Alexey
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