From: Kevin Baumgartner (kbaumgar@xxxxxxxxx)
Date: Wed Sep 13 2000 - 22:44:33 GMT-3
All this does is to allow enabling of fast switch
or by doing "no ip route-cache" to disable fast switch and
doing process switching.
The issue is that some features will not allow fast switching.
For example access-lists. The router need to look into each packet
to see if there is match on the access-list. So in this case fast switching
can't be used.
With fast switching it looks at the first packet and then
finds out what interface to send it to. Then all other packets who destination
is the same address will be fast switched out to the same interface and
will no have to look in the packet at all. This is much faster than
process switching.
Also a quick troubleshooting thing to try if
packets are not going out a interface is to turn
off fast switching. Especially if you are try some new
features and then don't work.
Kevin
At 08:05 PM 9/13/00 -0500, you wrote:
>Hi,
>
>Can anyone help me out here?
>
>I've been wondering about the aforementioned command. I realize, after lookin
g at the docs that "ip route-cache" enables fast switch processing but I'm curi
ous about the parameters and the ability to disable it.
>
>Can anyone provide me with some solid, factual, reasons as to why you would wa
nt to turn fast switching off or turn autonomous switching on, etc? Also why c
an you use it on a Vlan interface in a switch - this one sort of has me at the
moment?
>
>If this is something basic that I'm overlooking.......well....I was going to a
pologize but we all have to take a trip back to the basics sometime dont we....
.so I wont :)
>
>Thanks
>
>Jamie
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