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Questions on QoS for Voice

LouiseSmith
Occasional Contributor

Questions on QoS for Voice

Hello,

 

If I setup a new VLAN for the voice, should I still program the Qos for PBX since data and voice are in differenct subnet/vlan?

 

If yes, how do I program QoS on voice vlan to have priority 6?

 

Thank you

 

3 REPLIES
Vince-Whirlwind
Honored Contributor

Re: Questions on QoS for Voice

You would normally configure the end devices to correctly tag the traffic.

 

"6" is not the IEEE standard CoS setting for voice.

Priyansha
HPE Pro

Re: Questions on QoS for Voice

adding the voice keyword to a VLAN does the following:
enables LLDP-MED
sets 802.1p to 6
sets DSCP to EF, and
transmits the Vlan ID to the end device.

 

Thank you,
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Vince-Whirlwind
Honored Contributor

Re: Questions on QoS for Voice

I've been wanting to see this spelled out for years!

Thanks!

 

On a side note, notice HP uses a value of "6" for 802.1p?

As you can see, this is not IEEE-standard-compliant, the correct value should be "5":
http://en.wikipedia.org/wiki/IEEE_P802.1p

 

I've been hassling HP about this for years...