I need to set QOS on my Cisco switches for a new UCASS phone system. I have not used QOS before and want to make sure I do it correctly. The phones will be on their own VLAN so I am not sure if I can set this at a level that everything on that VLAN uses this QOS. What I need to set is DSCP 46 and L2P 5. and will this need to be set on all switches or just the ones that the phones physically plug into. Thank you for any assistance you can provide.