From: Richard Gallagher (rgallagh@cisco.com)
Date: Mon Apr 18 2005 - 21:28:42 GMT-3
Mark,
There are no real reasons that you want to disable CEF unless you were
running into a bug where's it causing problems.
You might find the following doc intersting, it answers some of your
questions:
-
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fswtch_c/swprt1/xcfcef.htm
HTH, Rich
--* Rich Gallagher - Cisco Systems TAC * CCIE #7211 - R&S, C&S
Mark Lasarko wrote:
>Just thinking - as much real world as the lab I suppose... >Are there *any* situations where 'ip cef' would not be desirable? >(aside from the obvious "do not issue the command ip cef") > >I can only think of two myself... and I am not sure if both apply?? > >The first is proxy-arp, 'cause this can cause a routing loop > >The second is if you wanted to load-balance by the routing protocol >then you would not want cef >The logic being that cef would assume the load balancing functions over >the routing protocol once populated. > >and while I have the burning smell inside my brain... >I recall reading that arp populates cef. >I also recall reading that when arp times out cef entries will do the >same >are these two perceptions correct? >and with cef enabled (and populated) how does this impact arp activity >- if at all? > >Thoughts? >~M > >_______________________________________________________________________ >Subscription information may be found at: >http://www.groupstudy.com/list/CCIELab.html
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