[c-nsp] CPU and Bandwidth utilization on a 7206VXR

raa at opusnet.com raa at opusnet.com
Fri Jun 30 17:26:06 EDT 2006


Good point.  Thanks.  35mb both in and out.  Plus a fast Ethernet doing the
same.  Currently using netflow.  I agree on the CPU.  I'm looking into why
we are not using cef.  Thanks.

!
interface Serial1/0
 description measured 25MB DS3 to ELI
 ip access-group 110 in
 ip access-group 111 out
 ip route-cache flow
 no ip route-cache cef
 no ip mroute-cache
 dsu bandwidth 44210
 framing c-bit
 cablelength 10
 serial restart-delay 0
 no clns route-cache
!

-----Original Message-----
From: Eric Kagan [mailto:ekagan at axsne.com] 
Sent: Friday, June 30, 2006 2:00 PM
To: raa at opusnet.com; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] CPU and Bandwidth utilization on a 7206VXR

> 
> I'm trying to determine the kind of backplane I would need in 
> a 7206vxr to sustain 50-80Mbps.  I currently have a NPE-300.  
> The router is our gateway. Right now we do about 35Mbps @ 
> ~60% cpu.  I'm wondering if I could get by with an NPE-400.  
> I'd love a G1, but don't think I can pull that off right now. 
> Does anyone have a similar setup?

When you say 35mb or 50-80mb is that total on the router over all interfaces
or 35/50-80 in/out from upstream and then 35/50-80 pass through to LAN ?  We
are doing about 60-80mb in bound on FE from upstream and 60-80 in bound on
FE to LAN on one of our border VXR/400, 512mb and the CPU sits about 45% -
based on this you should be fine with a 400.  Do you have CEF running ?  The
CPU seems a bit high for the 300 currently with 35mb

Eric




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