From: Chris Riling (criling@gmail.com)
Date: Fri Dec 28 2007 - 03:11:56 ART
Bruno's explanation makes sense to me as well, but if you shape the traffic
to 512K you'd have that "sledgehammer effect as well right? It was my
understanding that using the bandwidth command in and of itself doesn't
actually do anything to the traffic itself, just fools metrics if routing
protocols are involved, or, in this case, if you set the bandwidth command
to the actual bandwidth available on the DSL line, you'd be able to
"accurately congest" the interface when you actually are approaching the
limits of the DSL... At this point your QoS policies will take effect
because your interface will be congested... Maybe you want to set the
bandwidth command slightly lower than what's available, just so that the
traffic gets QoSed before it's actually policed by the service provider?
Just a thought, I might be rather incoherent; it's late.
Thanks,
Chris
On Dec 28, 2007 12:56 AM, Wollmann, Bruno RQHR <Bruno.Wollmann@rqhealth.ca>
wrote:
> Hi Cyrus,
>
> I think what you want to do is cause artificial congestion on your
> ethernet interface so that you can decide how to manage your traffic
> rather than having your SP just drop packets randomly.
>
> To do this you could shape all traffic on that interface to 512Kbps and
> then in a child policy apply your specific needs.
>
> class-map match-all SOMETHING
> match SOMETHING
>
> policy-map CHILD
> class SOMETHING
> priority 256
>
> policy-map PARENT
> class class-default
> shape average 512000
> service-policy CHILD
>
> HTH
> Bruno
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> sirus MOGHADASIAN
> Sent: December 27, 2007 9:05 PM
> To: groupstudy
> Subject: How to apply QOS on Eth link connected to SP while it never
> will be congested!!?
>
> I want to apply QOS on ethernet link that connects to ADSL modem (say
> 512
> Kbps) ,this interface never will be congested so QOS policy never going
> to work on it, The only way I found is 4 queue of switch to configure
> for applying QOS.
>
> Is there any other way to configure MQC on this ethernet interface while
> it is not congested (512 Kbps vs 100Mbps)?
>
>
>
> Cyrus
>
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