QoS for VoIP on ICX switches

Question

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?

unknown · Answer

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/xxlldp med network-policy application voice-signaling tagged vlan  priority 7 dscp 42 ports ethe 1/1/x to 1/1/xxAnd 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

unknown · Answer

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.

unknown · Answer

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