XG DHCP Service not working for IP telephones

What you generally see when deploying VoIP phone, is that these phone expect a Trunk port that transmits both the VoIP VLAN and the Data VLAN.

Has it already been verified that this setup is done correctly? Because if a PC gets a DHCP IP, and a phone does not, I'm not very inclined to look at the XG as the source of evil :)

You however have to make sure that the XG is playing DHCP server in both those VLANS obviously.

Daan,

thanks for answer.

There is no VLAN in place.

Espacially because all other DHCP Server (Fritzbox, Microsoft) are working fine.

Did you check what DHCP options your phones are expecting? Perhaps your non XG DHCP firewall is already providing those, and they are not setup in the DHCP of the XG?

I will check. Seems to be the only possibility.

I need to define DHCP Options using SSH, isn't it?

I didn'T find any options within the web admin.

Best Gernot

Hi,

Yes, DHCP Options are not in the Webadmin yet. 

https://community.sophos.com/kb/en-us/123529