VLAN issue with HP Procurve J9729A and Cisco ATA 187 IP Phones

[sphar1970]

Hi everyone,

We have Cisco ATA 187s that will only pickup a DHCP lease when they are untagged in their VOICE VLAN:

e.g. Port 18 below has the ATA 187 connected to it.

vlan XX

   name "Voice"
   untagged 18
   tagged 1-17,19-31,33-47
   ip address x.y.z.1 255.255.255.0
   ip helper-address x.y.z.6
   voice
   exit

If we tag all ports in the VOICE vlan, the ATA 187 will not pickup a DHCP lease.

vlan XX
   name "Voice"
   tagged 1-47
   ip address x.y.z.1 255.255.255.0
   ip helper-address x.y.z.6
   voice
   exit

The DHCP Server has 003, 005, 006, 015, 150 Cisco TFTP Server options defined

The ATA has the VLAN ID set to vlan XX

Any ideas appreciated.

[dmesser-hhs]

Is that your config on the core routing switch?  Check the VLAN settings on the phone (Operational VLAN ID, Admin. VLAN ID) 

Here is the config I use on my core routing switch and one of my edge switches.

Core Routing Switch:

______________________

vlan 60
name "Cisco_VOIP"
untagged I1
tagged A2,A12,B3,I23,Trk10-Trk12,Trk31-Trk38
ip address 172.17.104.1 255.255.248.0
ip helper-address 172.17.104.20
voice
exit

Edge Switch:

__________________________

vlan 60
name "Cisco_VoIP"
untagged 23-24
tagged 1-22,25-48
no ip address
voice
exit

[sphar1970]

Yes, that's the config on the Core and Edge switches, it should work given we have the IP helper.

But the ATA 187s will only work when we untag the port, making it very painful from an IT administrative perspective as if the phones move, their respective ports will need to be untagged as well.

[Chrisd131313]

Not sure if this is of any help to you... taken from the Cisoc ATA 180 series basic config online doc...

From version 2.15 and later, the default behavior of the Cisco ATA has changed in regards to the use of Cisco Discovery Protocol (CDP) and 802.1Q VLAN tagging. These changes might affect the way in which the Cisco ATA obtains an IP address from a DHCP server. If your Cisco ATA fails to grab an IP address or it grabs an IP address from your Voice VLAN, then you might need to change the default value in the Opflags field.

The doc can be found here.

HTH

[sphar1970]

Thanks for the information but the ATA 187 has no flags for debugging and really is a bare-bones devices when it comes to troubleshooting issues like this.