Subject: port-i386/14502: Problems with gre tunnels
To: None <>
From: Mihai Chelaru <>
List: netbsd-bugs
Date: 11/08/2001 13:13:12
>Number:         14502
>Category:       port-i386
>Synopsis:       Problems with gre tunnels
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 08 03:14:01 PST 2001
>Originator:     Mihai Chelaru
>Release:        NetBSD 1.5.2
System: NetBSD Dionysos 1.5.2 NetBSD 1.5.2 (Kefren) #0: Fri Oct 26 01:53:41 EEST 2001 root@Dionysos:/data/usr/src/sys/arch/i386/compile/Kefren i386
Architecture: i386
Machine: i386
	I setted a gre tunnel between the netbsd machine a a cisco one. The system was rebooting constantly. After bringing up the tunnel i saw that a route is auto-added like this: route add TUNNEL_DEST_IP TUNNEL_SOURCE_IP. I did a ping TUNNEL_DEST_IP and the system suddenly rebooted. I did a traceroute TUNNEL_DEST_IP and the result was the same. I erase that route and now the problem looks solved. 
	Make a gre tunnel and do a ping to the IP from the other end of the tunnel.
	Delete that strange route like this:
	route delete TUNNEL_DEST_IP