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QOS for Voice

Hi,
we are having issues with Voice breakage when using WebEx..But when we are using the voice conference feature the voice dosent break..only on webex the voice breaks..Below si the QOS settings on my router.Can you please let me understand what is wrong here.

We have a 40mb mpls link and its above 85% used during office hours.

policy-map WAN-EDGE
class ROUTING
bandwidth remaining percent 1
class VOICE
priority 3500
police rate 3560000 burst 256000 peak-burst 512000 conform-action transmit exceed-action set-dscp-transmit af41 violate-action set-dscp-transmit af41
policy-map VOICE-POLICY
class voice-traffic
set dscp af43

TimotiSt

How do you classify the packets? Just on DSCP marking?

arnold

Within webex as tomotist' question suggests, your voice qos does not impact/work on voice with webex as that is for the qos is seen as a data stream not meeting the voice QoS.
Webex falls into port 80/443 port data traffic, the only way to distinguish is by trying to handle the source/destination of the data packets as the criteria.

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Predrag Jovic

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Jody Lemoine

I see that you're manually marking excess traffic with your policer as AF41, so I'm presuming that you're using this DSCP value as an upstream indicator of what can be safely dropped. Unfortunately, AF41 is the DSCP marking for WebEx voice payloads as well, which might explain the poor quality. It would be a good idea to match existing AF41 traffic with your VOICE class-map and adjust your policer to re-mark transmitted packets that •don't• exceed the policer's parameters with the same DSCP marking as your phones' voice payload.