Fanglo MA wrote:
>
> Dear ALL,
>
> I have some congestion found with my Internet with is connected to the
> provider via FR. From the setting configurated by ISP, the no fair-queue
> is set on the FR link to ISP. I would like to ask if this is any
> negative impact on FR with fair queue so that make it be default to FR
> setting? What consideration should I consider to implement queueing
> policy to help improving congestion in my case? I know I should collect
> baseline performance for further evaulation, does anyone can advice how
> to collect such information? My router is low-end 2500 cisco running
> 11.3 feature.
>
If the issue is congestion, then weighted-fair queueing won't affect
that. WFQ can change the order of packets as they leave an interface,
but doesn't change the total _amount_ of packets. (Except to the extent
that it helps latency-sensitive apps/transports avoid a retransmission.)
If you're identifying congestion by the FECN/BECN counters in the output
of "show frame pvc x" and you are pretty sure that the frame cloud is
dropping frames during bursts, then frame relay traffic shaping may help.
It will take some empirical tuning, because each provider can police
differently, but for a starting point, shape the hub site output to
equal the remote site's port rate.
HTH,
Marty Adkins Email: [EMAIL PROTECTED]
Mentor Technologies Phone: 410-280-8840 x3006
275 West Street, Plaza 70 WWW: http://www.mentortech.com
Annapolis, MD 21401 Cisco CCIE #1289
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