Cisco ASA 5505 and VoIP configuration

[doraids80]

Hi, I am new to firewalls, is it possible to create a Voice-Vlan along with the data-Vlan so we can connect the network cable from wall to phone then from phone to the computer and those VLANS take different IP addresses just like we do on Cisco Routers?

if yes, can anyone help guiding me? Thanks

Data-Vlan would be Vlan1 (192.168.1.0)

Voice-Vlan would be Vlan20 (192.168.20.0)

DHCP would be provided from the server.

any guidance would be appreciated. 

[Karsten Iwen]

You can configure the switchport as trunk (you need the SecPlus License for that). On the voice-vlan, you enable DHCP-relay to forward the DHCP-packets to the server:

interface Ethernet 0/7
  switchport trunk allowed vlan 1,20
  switchport mode trunk
!
dhcprelay server 192.168.1.x NAME-OF-DATA-VLAN
dhcprelay enable NAME-OF-VOICE-VLAN

[doraids80]

Yes I have SecPlus and switchport e0/2 is already in trunk mode and allowes both vlans thru. 

Thanks, my configuration was missing dhcprelay, I'll test and put feedback