Re: GRE Tunneling on Catalyst 3750

I stumbled upon this issue a few months back. The limitation is in
hardware - you may be able to configure it and get it to work but cisco
will not support it and won't guarantee that the code will remain in
future releases.

I also did some testing and was seeing CPU > 40% with just ping traffic,
I think the main concern would be around STP not getting enough CPU
resource causing network instability.

HTH

Leon.

On 10/09/2009 06:50 PM, TL wrote:
> This information is true as of July'09. I do not see any updates after that
> on the internal alias.
>
> Regards,
> TL.
>
> On Fri, Oct 9, 2009 at 8:45 PM, Cacca Mucca<caccamucca_at_gmail.com> wrote:
>
>
>> I know c3750s have hardware limitations as GRE tunneling endpoints.
>>
>> This is from Cisco web site:
>>
>>
>> Q. *Does the Cisco Catalyst 3750-E support GRE tunneling?
>> *
>>
>> A. No. The Cisco Catalyst 3750-E can switch transient GRE tunneled
>> traffic
>> in hardware at wire
>>
>> rate, but it cannot act as a GRE tunnel endpoint. Future support of GRE
>> tunneling in software
>>
>> is possible.
>>
>>
>>
>> Has Cisco come up with a software solution?
>>
>>
>>
>> If so, what IOS?
>>
>>
>>
>> Thanks,
>>
>> Jim
>>
>
>
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Received on Fri Oct 09 2009 - 20:47:29 ART