[c-nsp] GRE tunnel on GSR

Harold Ritter (hritter) hritter at cisco.com
Mon Apr 23 08:17:12 EDT 2007


Primoz, 

You can't configure a GRE tunnel on the GSR without using a tunnel
server card (Engine 2 LC). Please refer to the following document to see
the list of E2 LC that can be use for that purpose.

http://www.cisco.com/en/US/products/sw/iosswrel/ps1829/products_feature_
guide09186a0080091815.html#wp1034175

Cheers, 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Primoz Jeroncic
Sent: Monday, April 23, 2007 5:21 AM
To: Cisco Mailing list
Subject: [c-nsp] GRE tunnel on GSR

Hi guys

I guess I'm missing something obvious here, but I really have no idea
anymore. I'm trying to establish simple plain GRE tunnel between two GSR
boxes. No matter what I try, tunnel interface is up, while line protocol
is down.
I mean, how hard can it be to configure plain gre tunnel? On every other
box it's working without problem, but not on GSR. Currently I'm running
Service Provider 12.0.30(S5) IOS on both boxes, and config is really
standard one:

box 1
interface Tunnel0
 ip address 10.1.1.1 255.255.255.252
 tunnel source 10.2.2.1
 tunnel destination 10.3.3.1
!
interface FastEthernet2/0
 ip address 10.2.2.1 255.255.255.0

box 2
interface Tunnel0
 ip address 10.1.1.2 255.255.255.252
 tunnel source 10.3.3.1
 tunnel destination 10.2.2.1
!
interface FastEthernet2/0
 ip address 10.3.3.1 255.255.255.0

Both Ethernet interfaces are of course connected and ping works fine
between
10.2.2.1 and 10.3.3.1. Also based on Cisco feature navigator this IOS
supports GRE, so I have really no idea anymore.

I would appreciate any hint, since I'm really without any further ideas
about this.

Have fun,
Primoz Jeroncic
Support - IP Connectivity & Routing
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