it is...
Peter Slow, CCNP Voice Specialist
Network Engineer
Planetary Networks
535 West 34th. Street
New York, New York
10001
Cell: +1(516) 782.1535
Desk: +1(646) 792.2395
Mail: [EMAIL PROTECTED]
-----Original Message-----
From: Ednilson Rosa [mailto:[EMAIL PROTECTED]]
Sent: Monday, June 25, 2001 9:23 AM
To: [EMAIL PROTECTED]
Subject: Re: Fast Switching on Cisco Routers [7:9753]
Hi Debbie and all!
Is one of theses switching methods the same as the "Cisco Express
Forwarding" (CEF)?? If not, what are the differences between them and, most
important, what do I loose on enabling it?
I tried the link you included in your message but I received a "Document Not
Found" :-( Is the link correct?
http://www.cisco.com/cpress/cc/td/cpress/design/topdown/td0512.htm
Regards!
ER
CCNA
----- Original Message -----
From: "Debbie Westall"
To:
Sent: Monday, June 25, 2001 9:18 AM
Subject: Re: Fast Switching on Cisco Routers [7:9753]
Mohamed,
My comments are included below.
Debbie
--- Mohamed El Komy wrote:
> I'd like to know "which is the default switching in
> Cisco Routers for TCP/IP
> traffic?" Is it Process or Fast Switching?"
> Also there're some questions I need an answer to:
>
> 1- When issuning debug commands,do I need to turn
> off Fast Switching ?
I'm not really sure about this, I have never read
anything that said this.
> 2- Which leads to more CPU and Memory utilization:
> Process or Fast Swithing?
Process switching is PER-PACKET load-balancing with NO
caching. It makes use of the routing table everytime.
It is the slowest of all the switching modes.
Fast Switching is PER-DESTINATION load-balancing, the
first packet hits the routing table, everyone after
that (to the same destination) is taken from the
cached entry.
> 3- What's the differnece between
> Fast,Autonomous,Silicon and Optimum
> Switching?
Autonomous switching is available on 7000 series and
above. Uses the "autonomous-switching" cache that is
located on the interface processors. Provides faster
packet switching bu allowing the controller to switch
packets indenpendently, without having to interrupt
the system processor.
Silicon switching - this is similiar to autonomous
switching, thru the use of a silicon-switching cache
located on the Silicon Switch Processor.
Optimum Switching - is similiar to fast switching, but
is faster, due to enhanced caching algorithm and
optimized structure of the "optimum-switching. ONly
available on routers equipped with a route/switch
processor (RSP).
All this info was taken from the following document:
http://www.cisco.com/cpress/cc/td/cpress/design/topdown/td0512.htm
>
> I also need some technical papers about Distributed
> Switching using VIP
> cards on Cisco 7500 series and its Architecture.
>
> Thanks,
> komy
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