From: Ruhann (groupstudy@ru.co.za)
Date: Tue Feb 17 2009 - 08:31:05 ARST
Hi
Guys, please correct on the following
In the event of load-sharing, ie one router with 2 link to another
By default routers running IOS 12.4 and later have CEF enabled by default on
most interfaces.
Default CEF will use per source/destination load-balancing,
CEF per packet can be enabled with "ip load-sharing per packet"
Then, you have fast switching and process switching:
Fast Switching (enabled with no ip cef and ip route-cache) does per
destination load-balancing only
when Process Switching (enabled with no ip route-cache) does per-packet
load-balancing again.
Please verify if above is correct, reason I asking, is I have found more
descrepencies with the DOC-CD,
claiming default cef does per dst only, but mr Doyle says it does per
src/dst.
(I have come to trust the Mr Doyle's teaching over the Doc-Cd, even though
his articles any not only cisco related.)
PS I did not mentioned here is the switching mechanism on the input
interface, as I am only after the differences conceptually.
Regards
-- <ruhann>Blogs and organic groups at http://www.ccie.net
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