From: Dennis J. Hartmann (dennisjhartmann@hotmail.com)
Date: Thu Sep 29 2005 - 22:53:12 GMT-3
I believe what Brian is talking about here is DUAL FIFO. This is
the nomenclature/syntax that will be displayed when viewing the physical
interface with such mechanism applied?
Can you verify this Brian? Thanks.
Cheers,
Dennis Hartmann
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Brian McGahan
Sent: Wednesday, September 28, 2005 4:18 PM
To: Stefan Grey; ccielab@groupstudy.com
Subject: RE: MQC bandwidth
Stefan,
Assuming you are referring to Frame Relay QoS it depends if you are
doing per-VC queueing or not. By default there is one shared output queue
for the interface regardless of how many VCs or subinterfaces you have. In
this case QoS is applied to the main interface since there is only one
output queue, and hence only one "bandwidth" value that is significant.
With legacy and MQC based Frame Relay Traffic Shaping each VC is
assigned a separate output queue that in turn contends for the transmit ring
of the interface. Since there are separate output queues you can apply
separate QoS attributes onto then, either at the main interface,
subinterface, or VC level. In this case the available bandwidth for a
particular queue is based on the "mincir" value, either as defined by the
"frame-relay mincir" command in legacy FRTS or the "shape adaptive"
command in the MQC. By default this value is half of the configured "cir"
or "average" rate.
If you have a specific practice lab task that you want more
information about for QoS feel free to post it, otherwise check here for
more information:
http://www.cisco.com/en/US/tech/tk543/tk544/technologies_tech_note09186a
00800a4754.shtml
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Stefan Grey
> Sent: Wednesday, September 28, 2005 11:25 AM
> To: ccielab@groupstudy.com
> Subject: MQC bandwidth
>
> Hello group,
>
> Question:
>
> "Output queue calculations for the MQC are based on the configured
> bandwidth value of the interface and not the speed the interface is
> clocked at.
Be
> sure to set the appropriate bandwidth value when configuring the MQC
on an
> interface."
>
> When we configure CBWFQ on the subinterface should we configure the
> reference bandwidth on the subinterface itself or on the physical
> interface.
> Where does router look for reference??
>
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