Subject: IP-IP v4 tunnel?
To: NetBSD Users's Discussion List <>
From: Peter Eisch <>
List: netbsd-users
Date: 12/19/2006 10:38:37
I tried using gif but my netbsd 3.0 upstream started dropping all the "big"
packets for the tunnel and returning:
 icmp 36: <tun-dest> unreachable - need to frag for IP

All the MTUs are standard: 1500 for Internet, 1280 on the gif tunnel.  The
routing was find -- everything worked very well for ssh and everything that
didn't approach the gif MTU.

Is there a _right_ way to tunnel ipv4 between two netbsd systems?