I'm currently exporting 3 interface flows on a 6503, with no measurable impact on CPU, and two interfaces on a ME6524, also with no impact. But, lower power routers may have issues. Of course, that's what the CPU utilization in the Intermapper probe is for. :-)
Tim Huffman Director of Engineering Business Only Broadband, LLC O (630) 590-6012 C (630) 340-1925 [EMAIL PROTECTED] www.bobbroadband.com > -----Original Message----- > From: [email protected] [mailto:InterMapper- > [EMAIL PROTECTED] On Behalf Of Chip Old > Sent: Friday, September 12, 2008 10:04 AM > To: InterMapper Discussion > Subject: Re: [IM-Talk] New InterMapper Feature - NetFlow Add-on - Call > forTesters > > On our remote Cisco 2811 routers I am exporting flows for two interfaces > each, and even at our busiest sites the processor load is never above 6%. > On two 7206VXR / NPE400 routers that handle many more interfaces and much > more traffic, processor usage stays in the 15% - 20% range. We've been > using netflow on all of these for about a year and have never noticed a > performance hit. YMMV depending on the capacity of your equipment. I'd > hate to do this with the 25xx routers we used to have at our remote sites. > > -- > Chip Old (Francis E. Old) <[EMAIL PROTECTED]> > Administrator, Network Operations > Baltimore County Public Library > 320 York Road > Towson, MD 21204-5179 US > 410-887-6180 office > 410-236-8582 mobile > 410-887-2091 fax > > > ________________________________ > From: Tim Huffman <[EMAIL PROTECTED]> > Reply-To: InterMapper Discussion <[email protected]> > Date: Fri, 12 Sep 2008 10:46:35 -0400 > To: InterMapper Discussion <[email protected]> > Subject: RE: [IM-Talk] New InterMapper Feature - NetFlow Add-on - Call > forTesters > > Andrey is right. The bandwidth involved is very low, although a large > number of collectors (or flows!) could eat a VERY large amount of disk > space! > > Exporting flows is not bandwidth intensive (it's basically just text), but > it can be processor intensive on the routers (depending on the router, how > many interfaces you are exporting flows on, and how much traffic/how many > flows the router has to keep track of), which is one of the reasons the > CAT3500 series won't do it. > ____________________________________________________________________ > List archives: > http://www.mail-archive.com/intermapper-talk%40list.dartware.com/ > To unsubscribe: send email to: [EMAIL PROTECTED] ____________________________________________________________________ List archives: http://www.mail-archive.com/intermapper-talk%40list.dartware.com/ To unsubscribe: send email to: [EMAIL PROTECTED]
