At 02:49 PM 11/30/2001 -0500, Brian Wallingford wrote:
>Are there practical bandwidth limitations to GRE tunnels (Assume such
>tunnels are restricted to a centrally-managed/owned network)? I was
>unable to find anything definitive on CCO.
We have run extensive tests on a 7206VXR, NPE400 sending to a 7513 w/ RSP4
and VIP4s. The numbers change depending if you run with or without CEF and
if you run with or without DCEF. Encap and decap also make a difference
and well as with or without checksums. Short summary:
- with no CEF and no DCEF, 22kpss with both the 7206 and the 7513 hit 99% CPU.
- with CEF or DCEF at 106kpps, the 7206 (doing the encap) will hit 100% CPU
and the 7513 will hit 96% CPU doing the decap.
- with DCEF/CEF but doing no checksums, one can hit 107kpps on the 7206VXR
doing encap and about 83% CPU and on the 7513 one will hit about 85% CPU
doing the decap on the VIP.
Regards,
Hank Nussbacher
Wanwall Ltd.
>brian
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