4500-x Hardware GRE experiences

[Wes Smith]

HW GRE support for the 4500-x was added in IOS-XE 3.07.

The release notes are pretty sparse.  

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/release/note/ol-37xe-4500x.html#pgfId-2633388

Does anyone have first hand experience using this feature on the 4500-x or Sup7 ?

Interested in performance/throughput  characteristics, capacities,   idiosyncrasies / gotchas. 

Cheers

[jerecassidy]

Hello Wes,

I was hoping you implemented some GRE-in-hardware on the 4500-x and are now able to answer your own question.  If not, maybe this will catch the eye of someone who has done so.

Thanks!

[wsmith@ca.ibm.com]

We did implement 4500x GRE but had to back it out.
There were switching bugs that punted most of the GRE traffic to the RP CPU.  
Performance was terrible.  

It's not a viable solution as of Dec 2015  IOS-XE 3.07.01.  

Might be fixed now, I don't recall the bug ID and I have not been tracking it.  

We were able to re-engineer and use QinQ for our tunneled traffic, but that's not an option if you have to transit a L3 network.