Packet sizes are believed to be roughly equivalent between both 3845's because our upstream is just preffing some subnets toward one path than another. I checked everything CEF/interface related on both routers and it all appears to be correct and healthy.
Thanks, Frank -----Original Message----- From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Tony Varriale Sent: Monday, March 28, 2011 10:24 PM To: cisco-nsp Subject: Re: [c-nsp] 3845 maxing out at 400 Mbps On 3/28/2011 9:14 PM, Frank Bulk wrote: > We have two 3845's as border routers, each with three GigE interfaces (one > facing upstream, the other downstream, the third facing the other 3845). > The first 3845 has a typical packet-size mix (residential/business Internet) > is consistently maxing out at 400 Mbps (predominately ingress because of > asymmetric routing) running at about 43 kpps and 40% CPU. It's flat-lines > very evenly, uncannily so. We checked and double-checked transport and it's > set much higher, the same as the second 3845. > > The second 3845, which has a mix of both ingress and egress traffic at a > combined 82 kpps (35 kpps ingress/50 kpps egress) but lower combined 360 > Mbps operates at a higher CPU (presumably because there's also egress > traffic) with no flatlining. > > The ACLs are BCP 38-oriented with eBGP; no rate-limiting. We're running > 124-11.XW2. > > Any ideas? The numbers are well below Cisco's router spec sheet. > > Frank The first idea is pretty obvious: different packet sizes. Why so? The second idea would be to make sure you are staying in the CEF path as much as possible. Verify that yet? tv _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/