I have a VTP transparent 4507 R with a trunk to the core switch . All Vlans are allowed on the trunk.
Also, locally I have created vlan 9 which is a data vlan.
Once , I configure the Gi port to use the data vlan and the voice vlan which is created on the core switch , the phones wont boot.
The modules in the 4507 R are X4548GB PoE.
switchport access vlan 9
switchport voice vlan 53
Vlan 9 is locally created on the 4507R.
If I use any other vlan for data ( except this Vlan 9) , the phones dont have any problem ; they boot up and download all the config from the DHCP.
Have anyone seen this before?