Stephane, I've used netflow on 1800 series routers and never noticed it consume significant CPU or memory resources. The flow exports the router will send to the netflow collector are small and you shouldn't notice an increase in site bandwidth consumption.
The value of netflow statistics are immense and well worth the small impact they have on system resources. A virus probing for other hosts will stand out like a sore thumb using the 'show ip cache flow' command on the console or running a report from your netflow collector. Or perhaps the traveling salesman at the site pulling a 2GB PST file over a 256K frame circuit. Keep in mind the port numbers are in hexadecimal if using the command line. Chris http:/travelingtech.net On Thu, Jun 3, 2010 at 12:52 PM, Stephane MAGAND <[email protected]>wrote: > Hi > > a small question: > > If i add Netflow on a Cisco 1721 routers with a 2 Mbits WAN link, > that's use a big quantity > of CPU/Memory ? > > If the server that receive the flow information are on the Wan, that"s > use a big quantity of > bandwith ? > > > The Cisco 1721 are used into a Mpls IP VPN (no ipsec) and with a BGP > Network (~90 routes) > > > Thanks > Stephane > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
