HP L3 Switch, SHoretel Voip and QOS/Prioritisation best practices

Im stuck on how best to achieve a reliable qos on our voice network.

HQ Overview:
Cisco Router (managed)
Cisco ASA 5505 (managed)
HP 2910al Poe L3 Switch (ours) - vlan1 - data & vlan20 - voice,            /         2x HP 1910s - vlan1 only
ingate siparator                                                                                       /           printers/computers
Shoretel kit, switches, director, etc..

My issue now is with regard to quality, so looking at deploying QOS.  I have added a prioritisation rule but not sure if the answer..
The phones are configured: 802.1q, tagging on, vlanid20.
Should i tag all vlan20 ports?  Currently all are untagged.  Phone direct in switch, not daisy chained.
Should i enabled voice on the vlan20 or is the rule sufficient?
vlan1 or primary, correct?

The current switch L3 config:
Running configuration:

; J9148A Configuration Editor; Created on release #W.15.08.0012
; Ver #02:11.05:16
hostname "HP-E2910al-48G-PoE"
module 1 type j9148a
mirror-port 5
power-over-ethernet pre-std-detect
qos type-of-service diff-services
timesync sntp
sntp unicast
sntp server priority 1 87.124.126.49
sntp server priority 2 178.79.165.21
time timezone 60
ip authorized-managers 172.19.0.0 255.255.0.0 access manager
ip authorized-managers 172.16.0.0 255.255.0.0 access manager
ip authorized-managers 10.255.255.0 255.255.255.128 access manager
ip authorized-managers 192.168.2.0 255.255.255.0 access manager
ip authorized-managers 192.168.3.0 255.255.255.0 access manager
ip authorized-managers 10.255.254.0 255.255.255.128 access manager
ip authorized-managers 192.168.100.0 255.255.255.0 access manager
ip default-gateway 172.19.10.15
no ip icmp redirects
ip route 0.0.0.0 0.0.0.0 172.19.10.15
ip routing
interface 1
   name "to HP1910 (top)"
   no power-over-ethernet
   exit
interface 2
   name "tp HP1910 (bottom)"
   no power-over-ethernet
   exit
interface 3
   name "to ASA 5505 fe01"
   no power-over-ethernet
   exit
interface 4
   name "Cisco_AP_172.19.3.20"
   exit
interface 5
   no power-over-ethernet
   exit
interface 6
   no power-over-ethernet
   exit
interface 7
   name "Shoretel E1k"
   speed-duplex 100-full
   exit
interface 8
   name "Shoretel SG90"
   speed-duplex 100-full
   exit
interface 9
   name "Shoretel SG90Bri"
   speed-duplex 100-full
   exit
interface 10
   name "chi-Oaisys"
   exit
interface 11
   name "Shoretel HQ"
   exit
interface 12
   name "Ingate"
   exit
interface 14
   name "Test Phone"
   exit
snmp-server community "public" unrestricted
snmp-server contact "IT"
vlan 1
   name "DEFAULT_VLAN"
   no untagged 7-48
   untagged 1-6
   ip address 172.19.4.5 255.255.0.0
   exit
vlan 20
   name "Voice"
   untagged 7-48
   ip address 172.16.4.5 255.255.0.0
   ip helper-address 172.19.10.17
   ip helper-address 172.19.10.18
   qos dscp 101110
   exit
no autorun
password manager

Thanks
LVL 1
CHI-LTDAsked:
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rscottvanCommented:
Your configuration should be fine.  If the phones and Shortel gear are connected to the same physical switch and running in the same VLAN untagged, QoS should not be needed at all on VLAN 20 and is only adding complexity you don't need.

Do your calls go in/out via PRI/s or VOIP trunks?  If VOIP, then you need to prioritize (QoS) at the WAN edge for traffic between your VOIP trunk provider and your Shoretel system.  (I think this would just be the siparotor, but I'd need some additional clarification about your config, like a drawing.)

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CHI-LTDAuthor Commented:
others on here are saying we need qos regardless...

calls go over sip trunks.  yes we use a siperator.
flow:

internet - cisco router - cisco firewall - ingate and l3 hp switch - phones and shoretel kit

everything gatewaying through the switch.
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