Subject: Re: New gre interface
To: None <>
From: Matthias Scheler <>
List: tech-net
Date: 09/14/1998 07:38:03
In article <>,
	"Heiko W.Rupp" <> writes:
>   Traceroute does not work yet over the tunnel :(

This is AFAIK not a bug in your GRE code. Routing packes through the
tunnel will requires less hops. So if the remote host doesn't use a tunnel
route back it ICMP replies will have a too low TTL to reach your system.

You can watch the same phenomenon with Linux's IPIP tunnel.

Matthias Scheler