QoS for VoIP on ICX switches

[chris_everett_f]

Hello all,

I'm trying to set up some basic QoS functionality on a number of ICX7150 switches.  I have all of my phones in a particular vlan and would like to have the switch mark any incoming packets on that vlan with an appropriate DSCP value.  I thought that the command to do this was ip-dscp-remark 46, on the vlan in question.  But this doesn't apply to the vlan, but rather the whole switch.  

Anybody have any idea on how to do this?

[paul_mcguire_20]

You should only need “trust dscp” on each port that has a phone.

[netwizz]

Paul is correct provided the phone marks the DSCP value on the packets.  If not, there really is not much of a way to create classes and queues in the ICX environment.

[eric_pouliot]

For VoIP I use these settings:

lldp med network-policy application voice tagged vlan priority 7 dscp 46 ports ethe 1/1/x to 1/1/xx
lldp med network-policy application voice-signaling tagged vlan priority 7 dscp 42 ports ethe 1/1/x to 1/1/xx

And on each ports, I have :

 loop-detection
 dual-mode 
 spanning-tree root-protect
 spanning-tree 802-1w admin-edge-port
 inline power power-by-class 2
 voice-vlan
 stp-protect
 broadcast limit 12000
 unknown-unicast limit 10000
 stp-bpdu-guard
 trust dscp