[c-nsp] VAM2+ Performance

[Peter Rathlev]

On Wed, 2010-03-17 at 18:05 +0000, Antonio Soares wrote:
> Does anyone have access to real world performance values for the VAM2
> + ? I have a router hitting the 50% with 40 Mbps of traffic. It
> has a NPE-G1 an it is running 12.4M. I also have ACLs and QOS.
> 
> The VAM2+ data sheet mentions "up to 280 Mbps":

We use a VAM2 (no "+") in an NPE-G1 12.4(24c)M, and it uses ~5% CPU when
doing ~20 Mbps and ~2 kpps.

AFAIK the VAM should do the encryption, so the CPU load would be from
GRE and maybe fragmentation.

Could it be fragmentation? Do you MSS-clamp the tunnels? Does "show ip
traffic" show many/any fragmentation?

-- 
Peter