From: Vincent Mashburn (vmashburn@fedex.com)
Date: Wed Jan 31 2007 - 11:14:04 ART
Bob,
I have had the same question for some time now. I have run some tests
and tried to make the buffers fill up to see if I could spot any buffer
failures in the "show buffers" output. My thinking was that if I could
spot the pool where the failures are occurring then I would know where
the buffers are being pulled from, but no luck there. The only thing
that I can think of right now is that there is some sort of dynamic
allocation from the RAM. This is one of many features that are not well
documented on the 3560.
Thanks
Vince Mashburn
Sr. Voice / Data Engineer
901-263-5072
CCVP, CCNP
Cisco IP Telephony Support Specialist
Cisco IP Telephony Operations Specialist
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Bob Sinclair
Sent: Wednesday, January 31, 2007 7:33 AM
To: ccielab@groupstudy.com; cisco@groupstudy.com;
cisco-nsp@puck.nether.net
Subject: 3560 egress queue buffers
Is it possible to determine the number of buffers allocated to a 3560
egress queue? The configuration guide tells us that buffer space can be
allocated among the 4 queues, using a queue-set, as follows:
mls qos queue-set output 1 buffers A B C D
Were A, B, C and D are percentage values that must total 100. My
question is "percentage of what number?" The same question could be
asked about the Weighted Tail Drop thresholds. Is it possible to
determine the absolute value of the buffer space allocated in packets or
bytes?
With the 3550 you can define buffer depth, in packets, using the reserve
levels, but I see no analog in the 3560.
Any input appreciated!
-- Thanks,Bob Sinclair CCIE 10427 CCSI 30427 www.netmasterclass.net
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