Voice Vlan compatibility with 802.1x authentication ?

Millbull

Hello,

I'm having trouble with Voice vlan and 802.1x authentication.

On my GS1920-48HP (v4.80), 802.1X and radius is working fine.

My settings are:

Vlan 100, 110, 252 untagged (802.1x enabled)

Vlan 20 (guest vlan), untagged. And Vlan 20 PVID on all ports with 802.1X enabled.

I've configured Voice vlan 3 with OUI for my Polycom Ip phones.

All ports on vlan 3 untagged.

When I connect an Ip phone, it shows PVID 3 in the Mac Table section but the phone gets an IP adress from Vlan 20 (guest vlan).

The only way I've found to put the phone in Vlan 3 is to disable Vlan 20 on this port.

So, is Voice Vlan compatible with 802.1X and guest vlan, and if so, what could be the problem?

Regards

Zyxel_Melen

Hi @Millbull

The Voice VLAN has higher priority than 802.1X and guest VLAN.

I did a local lab and my IP phone can get the correct IP address from voice VLAN interface.

May I know if your configuration is the same as your provided before? If so, I will check your configuration.

Please also help to check:

1. Does there have any VLAN mis-configuration in your topology?

2. Does your IP phone set static IP address or static VLAN?

Millbull

Hi @Melen,

Thank for the reply.

The IP phone uses dhcp.

I will send you a private message with the config file and tech-support.

Regards