> On 15 Jul 2015, at 19:34, [email protected] wrote:
> 
> hi,
> 
> okay...have googled and looked around...and no current joy.

Tunnel bandwidth configured on the interface, or being default is
only for information, and is not being enforced in any way. 

> we have a GRE tunnel between a 6506 (sup2T) running IOS 15.1 and a 3750 
> running IOS 15.2

3750 doesn’t support GRE, you’re hitting limitation of the platform.
It’s miracle it works - mostly propably, because it hits software
forwarding path, and even if it’s not supported, it works - somewhat.

-- 
| "There's no sense in being precise  |            Łukasz Bromirski |
|  when you don't know what you're    |   jid:[email protected] |
|  talking about."   John von Neumann | http://lukasz.bromirski.net |

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