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QOS - 4500 12.2.25SG

nkhwaja
Level 1
Level 1

‎12-21-2005 10:34 AM - edited ‎03-03-2019 01:12 AM

Should DBL be configured for voice traffic class ?

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mheusinger
Level 10
Level 10

‎12-21-2005 03:07 PM

What exactly do you mean by DBL?

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nkhwaja
Level 1
Level 1
In response to mheusinger

‎12-30-2005 08:20 AM

DBL = dynamic buffer limiting that is enabled by 'qos dbl' command on 4500 switches.

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m.mcconnell
Level 1
Level 1
In response to nkhwaja

‎12-30-2005 11:09 AM

Well, DBL works with AQM (Active Queue Management) which is a congestion avoidance type of QoS. Congestion Avoidance is usually considered bad in a voice environment because it drops packets and dropped packets will cause poor voice quality. You probably don't want to use DBL for voice and you might want to be careful with it for TCP flows.

-Mark

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