Hardware for 50Mbs BGP feed.WAS Rate Limiting on Cisco Router

[Dylan Ebner <dylan.ebner () crlmed com>]

Yesterday we took possession of a free 50Mb connection upgrade from one of our ISPs. The previous connection was 30Mbps 
with a partial route table via BGP. Other than BGP, the only other complex functions the router performs is access 
listing the CRYMU Team Bogon table and traffic shaping. We terminate this into a 2811 running 12.4 with 512MB of 
memory. When the Access lists were applied we peaked the connection at 39Mbps and when the access list was removed we 
peaked at 43.5Mbps. The CPU was pegged at 65% with the acl and 50% without. Given the recent discussion about 80Mbps 
and a 7200, what would members here recommend for a 50Mb connection that we expect to grow to 100Mb in the next 18 
months. We are also planning on adding netflow collection in the next year as well.

We were think of upgrading to a 3900 series, but it sounds like maybe we should be thinking bigger?

Also, how do members determine if their routers are overloaded. Besides looking at memory and CPU usage are their other 
statistics they look at? Are their third party tools that provide some insight into the routers condition?



Dylan Ebner

-----Original Message-----
From: Alan Bryant [mailto:alan () gtekcommunications com] 
Sent: Thursday, July 08, 2010 8:33 PM
To: gordslater () ieee org
Cc: Murphy, Jay, DOH; nanog () nanog org
Subject: Re: Rate Limiting on Cisco Router

So you guys would not recommend the traffic shaping route on a 7206
with a NPE-G1? Is it the processor or memory that would not be able to
handle it?

I don't necessarily plan on doing anything other than limiting it at
80Mbps or whatever it is that we are capping ourselves at at the time.

On Thu, Jul 8, 2010 at 7:13 PM, gordon b slater <gordslater () ieee org> wrote:
> On Thu, 2010-07-08 at 18:54 -0500, Jack Bates wrote:
> > underpowered router or poor code
>
> Agreed. So which is it?  :)
>
> To be fair, some IOS versions were better than others at it in my
> limited experience of that chassis.
>
> Gord
> --
> I hold you XAP



-- 
Alan Bryant | Systems Administrator
Gtek Computers & Wireless, LLC.
alan () gtekcommunications com | www.gtek.biz
O 361-777-1400 | F 361-777-1405