From: Cisco Net (network.cisco@gmail.com)
Date: Sat Nov 06 2004 - 00:08:58 GMT-3
Marvin,
Its a cool calculations..
By the way if one of the q byte count is not given, would you assume
it as 1500 also (iam not talking about the default q in custom q). In
this example
lets say "queue-list queue 2 byte-count 3000" is not configured but
queue-list 1 protocol ip 2 tcp ftp
queue-list 1 protocol ip 2 tcp ftp-data
are configured. So should i assume that que 2 is 1500 bytecount ?
Another question, if there is no default class is configured in the
given custom queue, still do i need conside the 1500 byte count when i
calculate the percentage ?
Thank you
REgards
Cert
On Fri, 5 Nov 2004 19:00:53 -0800, marvin greenlee
<marvin@ccbootcamp.com> wrote:
> You have a total of 4 queues
> queue 1 5000 bytes
> queue 2 3000 bytes
> queue 3 500 bytes
> queue 4 1500 bytes (default byte-count for custom queueing)
>
> Assuming that there is traffic in all the queues, the traffic will be sent
> round robin, based on the queue sizes. For one cycle, a total of 10000
> bytes is sent. Of that cycle, 5000 is www (queue 1), so www would receive
> 50% of the bandwidth (5000/10000). The other queues are also calculated
> based on the byte count's relation to the total bytes sent in the cycle.
>
> 30% - queue 2 (FTP / FTP data)
> 5% - queue 3 (telnet)
> 15% - queue 4 (default)
>
> You don't need to reserve bandwidth for the default traffic, but the other
> reservations are made, bringing the total for the service policy to 85%, and
> the max-reserved bandwidth must be adjusted since the default is to only
> allow you to reserve 75% of the interface bandwidth. The default queue
> length for a queue is 20 packets. Since the WWW queue had a limit of 30,
> that was brought to the class.
>
> Are you sure that the answer values aren't bandwidth percent values?
>
> With the bandwidth values in K, the reservation would be a total of 85K.
>
> - Marvin Greenlee, CCIE#12237
> Network Learning Inc
> marvin@ccbootcamp.com
> www.ccbootcamp.com (Cisco Training)
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Joseph D. Phillips
> Sent: Friday, November 05, 2004 6:35 PM
> To: group study
> Subject: QoS [bcc][faked-from]
> Importance: Low
>
> Regarding Internetworkexpert Lab 15:
>
> Could someone please explain to me the math used to equate the following
> custom queueing config (or at least send me a Cisco link explaining it)....
>
> interface e0/1
> custom-queue-list 1
> queue-list 1 protocol ip 1 tcp www
> queue-list 1 protocol ip 2 tcp ftp
> queue-list 1 protocol ip 2 tcp ftp-data
> queue-list 1 protocol ip 3 tcp telnet
> queue-list 1 default 4
> queue-list 1 queue 1 byte-count 5000 limit 30
> queue-list 1 queue 2 byte-count 3000
> queue-list 1 queue 3 byte-count 500
>
> ...to this...........
>
> class-map match-all migrate-ftp
> match protocol ftp
> class-map match-all migrate-www
> match protocol http
> class-map match-all migrate-telnet
> match protocol telnet
> policy-map migrate
> class migrate-www
> bandwidth 50
> queue-limit 30
> class migrate-ftp
> bandwidth 30
> class migrate-telnet
> bandwidth 5
> interface Ethernet0/1
> max-reserved-bandwidth 85
> service-policy output migrate
>
> (By the way I couldn't do bandwidth 5 under the policy-map.. the lowest
> value was 8.)
>
> ????????
>
> If the byte-count is used to determine the bandwidth, www traffic, for
> instance, would be limited to 40,000 bps which is .0004 of the
> transmission rate the link supports (Ethernet).
>
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