From: Charles Church (cchurch@wamnet.com)
Date: Fri May 30 2003 - 13:23:01 GMT-3
Scott,
Is it safe to say that when the bytes you're trying to borrow from the next
cycle exceed the byte count associated with a cycle (ie you just transmitted
a 1500 byte HTTP packet, only 500 was permitted), that both the second and
third cycles for HTTP will be queued/dropped, since they were borrowed?
Chuck Church
CCIE #8776, MCNE, MCSE
Wam!Net Government Services
13665 Dulles Technology Dr. Ste 250
Herndon, VA 20171
Office: 703-480-2569
Cell: 585-233-2706
cchurch@wamnet.com
PGP key: http://pgp.mit.edu:11371/pks/lookup?search=chuck+church&op=index
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Scott Morris
Sent: Thursday, May 29, 2003 1:15 PM
To: 'Ryder, Keith'; 'Oliver Ziltener'; ccielab@groupstudy.com
Subject: RE: CustomeQueuing default packet-size-no answer till yet
With IOS 12.0 and later, you no longer need to be as specific with the
frame size in your calculation of queue emptying. The IOS will allow
"borrowed" bits now, so if your queue chunk is 1024, and you have a 1500
byte packet, you're allowed to "borrow" bits from the next cycle,
meaning next time around you'll only be allowed to empty 548 bytes from
that specific queue (1024 minus the 476 bytes you borrowed from last
time).
So this saves a lot of headache in trying to guess what the average size
of an http packet is going to be (which of course, depends upon the
direction (requests or returns from a site)) or things like that.
So that may help clarify where the IPExpert labs are coming from
(haven't seen 'em though, so I'm just going off the cuff here).
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Ryder, Keith
Sent: Thursday, May 29, 2003 5:37 AM
To: 'Oliver Ziltener'; ccielab@groupstudy.com
Subject: RE: CustomeQueuing default packet-size-no answer till yet
Oliver
Not sure what Ipexpert are indicating.
There is also a misunderstanding of the terms.
Frame size is used to calculate the appropriate BYTECOUNT values for the
queue.
The 1500 in this context is the default byte count for each queue. By
modifying the byte count in each queue and the AVERAGE frame size the
required bandwidth can be approximated.
-----Original Message-----
From: Oliver Ziltener [mailto:ziltener@netcloud.ch]
Sent: 13 May 2003 22:39
To: Oliver Ziltener; ccielab@groupstudy.com
Subject: AW: CustomeQueuing default packet-size-no answer till yet
I try it again...
When nothing is in the exercise declared, then I was thinking the
default packet size has to be 1500, but in IPexpert section 23 they take
1024. What is right?
thnx
Oliver
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