unable to ping from vlan to vlan (pc only)

going to be something simple, im sure!
just connected a laptop into my vlan20 (voice) network and its not picking up an ip from my dhcp servers.  tried statics, still nothing.
i can route from my shoretel phones across to the data vlan1 and PCs from vlan1 to vlan20 fine.  Just computers on the vlan20 arent working.
Ideas?

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 authorized-managers 192.168.200.0 255.255.255.0 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 "Oaisys"
   exit
interface 11
   name "Shoretel HQ"
   exit
interface 12
   name "Ingate"
   exit
interface 19
   name "Test Phone"
   exit
interface 21
   name " "
   exit
interface 25
   name " "
   exit
interface 31
   name " "
   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 7-12
   tagged 13-48
   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
   voice
   exit
no autorun
password manager

thanks
LVL 1
CHI-LTDAsked:
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jburgaardCommented:
vlan 20 is only
untagged 7-12
so did you connect the PC in this range?

is your DHCP at one of these?
 ip helper-address 172.19.10.17
 ip helper-address 172.19.10.18
CHI-LTDAuthor Commented:
ah, yes i think i did!
yes to both
CHI-LTDAuthor Commented:
just connected a phone into vlan1 and its talking to vlan20.
i guess the untagged ports on vlan20 should be set to no untagged?

the untagged ports on vlan20 were configured this way for some historic qos issues.  not sure if this setting is correct or not..?
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jburgaardCommented:
a PC normaly should be connected to an Untagged port to be able to communicate.
a phone could be set up differently
with a PC connected to one of the untagged ports can you ping your default gateway, 172.16.4.5 ?
CHI-LTDAuthor Commented:
so if i wanted a computer connected to vlan20 to talk to vlan1 and get dhcp settings then i would need to configure the port (say port 15) to be untagged?
Am i correct in saying currently the settings are:

vlan 1
   name "DEFAULT_VLAN"
   no untagged 7-48 - can talk to anything anywhere.
   untagged 1-6 - will talk to anything anywhere
   ip address 172.19.4.5 255.255.0.0
   exit
vlan 20
   name "Voice"
   untagged 7-12 - will talk to anything anywhere
   tagged 13-48 - will talk to vlan20 only
   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
   voice
   exit

in which case how can the phones talk anywhere and my pc connected into the same port not get an IP?
jburgaardCommented:
"so if i wanted a computer connected to vlan20 to talk to vlan1 and get dhcp settings then i would need to configure the port (say port 15) to be untagged?"
If the port to witch the PC is connected if that is not an untagged port (here in vlan20) then it cannot communicate with the switch at all.
In general there must be a match between switchport-tagging and device-tagging.

Am i correct in saying currently the settings are:..in short: no, tagging is about basic connectivity.
CHI-LTDAuthor Commented:
still don't understand how a phone in say port 31 can get an ip and a PC cant..
jburgaardCommented:
if the phone can communicate on port 31, then the phone is aware of how to interpret the packets tagged with the vlan 20 extension (tagged packet are longer than untagged).
The PC just drops these packets.
CHI-LTDAuthor Commented:
ok.  well just changed the port from tagged to untagged:

vlan 20
   name "Voice"
   untagged 7-12,19
   tagged 13-18,20-48
   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
   voice

i can now get an ip from the voice scope..
jburgaardCommented:
good
CHI-LTDAuthor Commented:
in in our case regarding qos, our phones get the 802.1q tagging from the shoretel director server, and ip address via a dhcp scope on data vlan1.   The switch has those vlan20 ports tagged also.
We also have qos & prioritisation setup on the router and dedicated bandwidth for voice.

By having tagging enabled on the switch and phones is this correct, do both need to have tagging enabled?
jburgaardCommented:
Phones can be set up in more ways , one way in witch you have phone connected to switch and eventually one pc connected through phone, in that setup if pc and phone should end in different vlans , then the switch port would be untagged in pc-vlan and tagged in phone-vlan.
But you cannot say one way is the only way, only there must be a match between the components in the setup including DHCP-options, software-settings downloaded to phone during init, switch-port-settings etc.
HTH

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