From: Ram Shummoogum (rshummoo@ca.ibm.com)
Date: Fri May 23 2003 - 11:15:32 GMT-3
I hope you realized that with those numbers you will not be able to realize
the exact %.
Packet size 500----------------25%
Packet size 1412---------------10%
Packet size 700-----------------65%
STEP1: Divide 0.25 by 500,0 .10 by 1412 and 0.65 by 700
0.10/1472 will give you the smallest number.
STEP 2:Rationalize the results from step 1 by dividing by (0.10/1472)
Results are: 7.06, 1, 13.11 ( normally at this level you try to convert
them to a whole numbers by multiplying by a small constant, but in this
case it is not possible unless you multiply by 100 which is not recommended
as your queue 2 and default might starve). If the results from step 2 were
1.5, 2, 2.5 then you multiply by 2 to get 3, 4, 5.
Round up the above numbers( i.e 7.06, 1 and 13.11)
Results are: 8, 1, 14
Multiply by packet size:
Results: 4000 1412 9800 Those are your byte count:
4000 + 1412 + 9800 = 15212.
Verification:
(4000/15212) * 100% = 26.3 % which is close to 25%
(1412/15212) * 100% = 9.28 % which is close to 10%
(9800/15212) * 100% = 64.42 % which is close to 65%
HTH
RAM
"Emad" <emad@zakq8.com>@groupstudy.com on 05/23/2003 04:18:31 AM
Please respond to "Emad" <emad@zakq8.com>
Sent by: nobody@groupstudy.com
To: "CCIE LAB (E-mail)" <ccielab@groupstudy.com>
cc:
Subject: Custom-queueing
Dear Folks,
I have an example of custom queuing but I forgot the point behind it , can
u plz suggest a solution and describe it ,
I want to configure custom queuing on a router with a BRI interface
regarding the following:
EIGRP,OSPF and IPX traffic have an average packet size of 500 and need 25
percent of the link . WWW traffic has an average packet size of 1412 and
will get 10 percent of the link. The average packet size for the default
queue is 700 and will get 65 percent of the link
Assign the queue to the interface
(plz describe to me in details how u calculate the queue byte-count )
after finishing this example , I want to ask for another something , I have
old books like Karl solie but QoS is not well covered and I don't have
newer books talking about large scale QoS like required in the new lab ,
therefore plz provide me with more scenarios about QoS that may fulfill my
shortage in resources
Thanx in advance
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