From: Roger Dellaca (rdellaca@xxxxxxxxxx)
Date: Tue Jan 16 2001 - 22:08:03 GMT-3
as far as CAR, I think it's a good solution, but the lab was written in Sep 99
(se the "topology" page), was CAR even around? The best solution now may not b
e the answer at that time.
I can see the logic of wanting to put the traffic-shape on both ends. In the a
nswer given, the access-l has telnet as the destination, and it's on the router
with the referenced token-ring, so the packets are sourced from the token ring
with destinations of telnet daemons somewhere else in the network, as you stat
e.
So the logic I would attach to this is that it will slow down the input to teln
et if you cut & paste large volumes of commands! - but has no effect on the sp
eed with which you receive back screens.
>>> "Connary, Julie Ann" <jconnary@cisco.com> 01/10 2:17 PM >>>
That's what I thought of doing at first - and then the lab answer was
to use traffic -rate shaping on the serial so I questioned why only on
one side.
This is the fatkid lab on performance and queing at fatkid.com
Also - does token-ring support CEF? The docs say you have to have CEF to do
CAR.
Julie ann
At 08:04 PM 1/10/2001 +0200, you wrote:
>Ann,
>
>What about using input and output CAR on R3?
>This way shouldn't you force telnet (TCP) to back-off due to the windowing
>mechanism?
>Objections?
>
>-----Original Message-----
>From: Connary, Julie Ann [mailto:jconnary@cisco.com]
>Sent: Wednesday, January 10, 2001 3:53 PM
>To: ccielab@groupstudy.com
>Subject: traffic shaping on a serial line
>
>
>Hi,
>
>if you have the following:
>
>
>
>R1 --------serial at 64K ---------------R3 --------Token Ring
>
>You want to limit the users on the token ring from telnet using over 32K of
>the bandwidth,
>
>So I know on R3 you would use GTS to limit telnet to 32K.But what about the
>reverse traffic coming from R1?
>
>Don't you have to traffic shape there too? The fatkid labs only shape on
>one side of the link - the R3 side.
>Seems to me that in telnet you issue a command and get a screenfull of data
>- so more traffic would
>be coming back and you would want to also limit on the R1 side. Thoughts?
>
>I guess you would assume that the telnets are ONLY sourced from the
>TokenRing - so
>your access-list on R1 would have to be:
>
>access-list 101 permit tcp any eq telnet any
>
>vs. the access-list on R3:
>
>access-list 101 permit tcp any any eq telnet.
>
>
>Julie Ann
>
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> Julie Ann Connary
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