ProCurve QoS VoIP

[Infatuas]

I've read through a few posts but none adressed my questions.

Normally for QoS on VoIP vlan I do the following:

vlan 700

name "VoIP"

qos priority 6

exit

I have recently changed this method to include dscp-map to priority 6 as it allows me to qos specific ports, specifically those in which have a PBX connectd as Mitel's PBX does not include QoS tags by default which helps with QoS'ing the signalling traffic. now it looks like this. In short, I'm forcing all VoIP to not only be retagged with DSCP46 but tagging traffic that otherwise wouldn't be in a normal deployment.

(config)# qos dscp-map 101110 priority 6

vlan 700

name "VoIP"

qos dscp 101110

exit

I have proven out that it is sucessfully applying qos policy to my pbx now. However, I saw another option and was wondering if it would help at all.

(config)# qos type-of-service diff-services

Since I have already performed packet captures and verified traffic is flowing into proper QoS queues is the diff-services command directly above even necessary? I believe by default without specifying type-of-service it is already Differentiated Services but just needed some confirmation.

[paulgear]

The preferred setup for VoIP VLANs is to use the "voice" keyword; this sets both 802.1p priority and DSCP, as well as enabling LLDP-MED on switches which support it.