May i know whether MX480 support voice vlan? If support is it the configuration same as below url?
interface GigabitEthernet0/3switchport access vlan 122switchport mode accessswitchport voice vlan 222spanning-tree portfastspanning-tree bpduguard enable!
Thanks and appreciate any help
MX platform doesn't have a pre-defined voice/voip vlan just like the EX have. But you can manually define one with preserved VLAN and corresponding Forwarding Class
The configuration is supported on the mx with the 802.1x docs here.