Bump - anyone have thoughts on this one?
From: scarruthe...@hotmail.com
To: ccie_voice@onlinestudylist.com
Date: Sun, 14 Feb 2010 10:40:58 -0800
Subject: [OSL | CCIE_Voice] Adjust 3750 Egress Priority Queue Bandwidth
I wanted some thoughts on how others would handle a request to tweak the
amount of bandwidth availble to an egress priority queue on a 3750. So for
example a request to allocate 25% of available bandwidth for switchports
connected to IP phones on the 3750.
I have heard suggestions to handle this in the following manner - this is
assuming auto qos voip trust cisco-phone has been run on the port already:
interface fa 1/0/2
no priority-queue out
srr-queue bandwidth shape 4 0 0 0
srr-queue bandwidth share 0 33 33 33
But I'm struggling to see that this meets the requirement. In this
configuration we would be enabling shaping of queue 1 and assigning it 25% of
available bandwidth. Then assigning remaining bandwidth equally to the
remaining three queues. But this does not appear to be meeting the requirement
of assigning the priority queue 25% of the bandwidth. We would be assigning
the queue that RTP traffic is placed in by default 25% of total bandwidth but
the initial no priority queue out command technically disables a strict
priority queue and thus it does not seem to fit the requirement.
Thoughts? While I struggle to see the disablement of the priority queue as
strictly meeting the requirement - I also find no explicit means to allocate
the priority queue a strict amount of bandwidth (I.e. the equal if the ingress
queue command - mls qos srr-queue input bandwidth 75 25 that could be used to
meet this requirement for default priority ingress queue 1. How about skipping
the initial no priority queue-out command but only issuing the shape and share
commands as specified above? Wouldn't leaving the priority queue enabled and
assigning it a shape value of 25% (1/4) satsify the requirement better?
Thanks
Scott
Hotmail: Trusted email with powerful SPAM protection. Sign up now.
_________________________________________________________________
Hotmail: Trusted email with powerful SPAM protection.
http://clk.atdmt.com/GBL/go/201469227/direct/01/_______________________________________________
For more information regarding industry leading CCIE Lab training, please visit
www.ipexpert.com
