From: Raj Bahad (raj.bahad@xxxxxxxxxxxxxx)
Date: Wed Jul 24 2002 - 10:29:13 GMT-3
Hi,
Use the url listed below for a very good example on how to accurately work out
the byte count based on percentages for custom queuing which use various
packet sizes.
http://www.cisco.com/warp/customer/cc/pd/ibsw/ibdlsw/prodlit/dlsw5_rg.htm
I found it very useful.
Raj.
>===== Original Message From "Tom Larus" <tlarus@cox.net> =====
>The 12.1 IOS docs on this subject note that getting the byte-count right is
>not as important now as it used to be, because now the custom-queuing system
>remembers the deficit when a queue is depleted early or when the last packet
>from a queue does not exactly match the configured byte-count, and accounts
>for this the next time the queue is serviced.
>
>Does this mean we really don't need to worry so much about the packets sizes
>used by different protocols, or that if we don't get it right, our result
>will be less wrong than with 12.0, but would still be wrong? It would nice
>if we could be accurate using the default byte-counts now.
>
> Does anyone have a guide to the approximate packet sizes of various
>protocol's packets? The default is 1500. I read that DLSW needs FST
>traffic to be no more than 512 bytes, and I see that a lot of people set lf
>to 1500 for TCP DLSW traffic. I would imagine that this is so traffic
>originating on a 4472 MTU token ring interface doesn't have to be fragmented
>at a 1500 MTU ethernet interface. I seem to remember seeing IPX set to 1024
>in a practice lab solution, but I don't know if it is right. Telnet tends
>to use tiny packets, but does anyone know what a good reference byte-count
>would be?
>
>Thanks,
>Tom Larus
>----- Original Message -----
>From: "Tommy C" <tkc9789@hotmail.com>
>To: <limmt@lycosasia.com>; <ccielab@groupstudy.com>
>Sent: Tuesday, July 23, 2002 9:22 PM
>Subject: Re: FW: Custom Queueing bandwidth allocation
>
>
>> I think you'll also need the average packet sizes for each queue to come
>up
>> with the byte counts.
>>
>>
>> >From: "Ivan" <limmt@lycosasia.com>
>> >Reply-To: "Ivan" <limmt@lycosasia.com>
>> >To: <ccielab@groupstudy.com>
>> >Subject: FW: Custom Queueing bandwidth allocation
>> >Date: Wed, 24 Jul 2002 08:52:49 +0800
>> >
>> >Hi,
>> >
>> >Had a question on Custom queueing.
>> >When a question ask to use custom queueing and allocate different
>bandwidth
>> >to each queue, I"m not sure how to work out the bandwidth allocation base
>> >on the percentage.
>> >
>> >Example:
>> >
>> >allocate
>> >queue 1 to ip traffic with 50% bandwidth
>> >queue 2 to ipx traffic with 20% bandwidth
>> >queue 3 to sna traffic with 30% bandwidth
>> >
>> >
>> >With this, how should I specify in the
>> >queue-list 1 protocol <protocol> <queue_no> byte-count <byte-count>
>> >command.
>> >
>> >Appreciate for any advice.
>> >Thanks.
>> >Ivan Lim
>> >
>> >
>> >
>> >------------------------------------------------------------------------
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