From: George Spahl (georges@xxxxxxxxx)
Date: Tue Sep 19 2000 - 08:19:35 GMT-3
Kevin,
Are you saying that fast switching causes access-lists to be bypassed or
were you getting at something different?
Thanks,
George
At 06:44 PM 9/13/00 -0700, Kevin Baumgartner wrote:
>
>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
>looking at the docs that "ip route-cache" enables fast switch processing but
>I'm curious about the parameters and the ability to disable it.
>>
>>Can anyone provide me with some solid, factual, reasons as to why you would
>want to turn fast switching off or turn autonomous switching on, etc? Also
>why can 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 apologize but we all have to take a trip back to the basics sometime dont
>we.....so I wont :)
>>
>>Thanks
>>
>>Jamie
>
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