nanog mailing list archives

Re: Load balancing in routers


From: Donn Lasher <dlasher () clearskynet net>
Date: Mon, 08 Apr 2002 15:09:50 -0700



Paul's statement about CEF is interesting. It's probably the first public
statement I've ever heard where someone was praising CEF. Usually
discussions about CEF are accompanied by liberal amounts of swearing...

Just my anecdotal 2 cents:

2@Cisco 4000M, 4 T1's, load balanced. 5 meg of IP traffic, no filters.

no ip cef - 90% CPU - router on its' knees
ip cef - 40% router alive and kicking

Other than the memery overhead CEF adds to BGP, CEF is painless, and worthwhile.




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