[c-nsp] IP GRE tunnel up/down

[Matthew Huff]

If it cannot make the original connection it will show up/down

Can you route from the source to the tunnel destination and are there any firewalls that would block the GRE protocol?
Can the destination route back to the source loopback1?



-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Drew Weaver
Sent: Wednesday, July 13, 2011 11:20 AM
To: cisco-nsp
Subject: [c-nsp] IP GRE tunnel up/down

Howdy,

I am trying to establish a GRE/IP tunnel over the Internet:

interface Tunnel1
description GRE-Tunnel
ip unnumbered GigabitEthernet7/0/0
no ip directed-broadcast
tunnel source Loopback1
tunnel destination x.x.x.x
end

Pretty much no matter what I do the interface status is always:

Tunnel1 is up, line protocol is down

I've read that tunnels should be up/up unless you are using keepalives and it detects a failure.

Does anyone have any insight they can share on this?

thanks,
-Drew


_______________________________________________
cisco-nsp mailing list  cisco-nsp at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/