In my experience if the router has an entry in its routing
table for the destination then the GRE tunnel will show as
up/up. But if for some reason the router does not have an
entry in its routing table for the destination then the
GRE tunnel will show as up/down.
HTH
Rick
On 7/13/2011 2:11
-Original Message-
From: cisco-nsp-boun...@puck.nether.net
[mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Sascha Pollok
Sent: Wednesday, July 13, 2011 2:20 PM
To: Gert Doering
Cc: 'cisco-nsp'
Subject: Re: [c-nsp] IP GRE tunnel up/down
Can you route from the source to the tunnel
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
On Wed, 2011-07-13 at 11:19 -0400, Drew Weaver wrote:
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.
Is the destination reachable? I.e.
...@puck.nether.net
[mailto:cisco-nsp-boun...@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
Hi,
On Wed, Jul 13, 2011 at 12:20:17PM -0400, Matthew Huff wrote:
If it cannot make the original connection it will show up/down
There is no connection to be made for a GRE tunnel.
Can you route from the source to the tunnel destination and are there any
firewalls that would block the GRE
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?
All not relevant, unless tunnel keepalive is active.
Normally, the tunnel is down if either source or destination IP
Hi,
On Wed, Jul 13, 2011 at 08:19:54PM +0200, Sascha Pollok wrote:
Yes - or -imho- if the platform does not support it like a GSR
without a tunnel server card.
Oh, good point. We don't have any of these funny platforms... *duck*
gert
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