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]
