QoS for VoIP on ICX switches

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?