From: Balogh, Jim (jim.balogh@gwl.com)
Date: Wed Feb 15 2006 - 14:45:11 GMT-3
My formatting got messed up....this should look better:
________________________________
From: Balogh, Jim
Sent: Wednesday, February 15, 2006 10:34 AM
To: 'ccielab@groupstudy.com'
Subject: QoS Shaping Question
Please see configuration below. I am trying to get a handle on the Shaping
Queue, Interface Software Queue and TX ring. If I wanted to configure the
Shaping Queue with one LLQ for VoIP, and remaining traffic to be moved into a
WFQ, and then the Software Interface Queue as a WFQ, will my config look like
policy-map VOIP
class VOIP-RTP
priority 32 _ configures a LLQ within the SHAPING QUEUE!!
class class-default
fair-queue _ configure WFQ within the SHAPING QUEUE!!
policy-map SHAPE-ALL
class class-default
shape average 96000 960 _SHAPING Queue-shape to 96k with Tc=10ms
service-policy VOIP _ apply VOIP policy to the SHAPING QUEUE
interface serial0/0
fair-queue _enable WFQ for the SOFTWARE QUEUE!!!!
interface serial0/0.1
service-policy output SHAPE-ALL _ enable CB Shaping
From my understanding, if the transmission rate is above the Shaping rate, the
packets will be moved into the Shaping Queue. Then the scheduler removes a
packet from the Shaping Queue (either a WFQ or LLQ if a VoIP packet is
waiting), and if the TX Ring is full the packet is moved to the Interface
Software Queue. In this case the Software Queue is a WFQ.
QUESTION - if I want the Shaping Queue to retain the same config, how can I
configure the Software Queue as CBWFQ? Thx.
Jim
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