[c-nsp] why disable ip cache and direct broadcast in switch

[Gert Doering]

Hi,

On Wed, Feb 25, 2009 at 07:10:51PM -0600, Max Palatnik wrote:
> No ip-route cache with no keywords afterwards refers to the fast-switch
> handling of packets.  CEF is usually enabled globally on the device (and
> thus is enabled for each interface), so this forces the interface to use CEF
> and ensures fast-switching is not enabled on the port.

No.

"no ip route-cache" will force *process switching*, and that's a bad thing
(certain IOS versions needed this to get features not supported in the
fast path, like per-packet load balancing on parallel links - but that's
really something you should immediately forget again, process switching is
*bad*).

If you want CEF, configure "ip route-cache cef" (which is default on recent
IOS versions, so it might not be visible in the config).

gert

-- 
USENET is *not* the non-clickable part of WWW!
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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