Phones not communicating with pabx.

[Keith Gauci]

Hi all.

I have to sites configured, site A and site B.

-Site A is the main site where the PABX is located. All the phones at site A works perfectly fine. Network: 192.168.31.0/24
-Site B is configured with a point to point VPN that is connected to site A. On site B i divided the network with VLANS. Having 192.168.1.0/24 as default VLAN and 192.168.10.0/24 as the LAN.
-From Site B's LAN I manage to ping the PABX.

A few months ago I've set up 3cx on a PC at site A as a temp solution. Everything was working. Even on site B. When I connected a phone to the LAN network is was being auto provisioned.

A week ago I transferred the 3cx on an VM (Hyper-V). I kept the same IP, the firewall test showed that all is ok and the dashboard didn't show any problems. But, now at site B when I connect a phone to the LAN network the phone is getting an IP from the default VLAN network thus it does not see the PABX thus it doesn't auto provision.

I'm sure that it is not a VLAN issue as if I connect another device to the same wall port/ switch port it gets an IP on the LAN network,

Has anyone encountered this before? Or maybe someone knows of a solution?
I was thinking to implement the DHCP option 66. Is it the case?


Thank you and have a good day.

 

[AWS2P]

did you try to factory reset a phone and register it from scratch ?

 

[Keith Gauci]

did you try to factory reset a phone and register it from scratch ?

Yes i tried. With a phone that was working and with a new unboxed one to be sure.

 

[HRMNY]

Do you have the port on your switch set correctly(I would assume, trunk port) for the HyperV host? In the virtual switch on the host do you have the VLANs defined?

 

[Saqqara]

Unless you are passing pnp traffic down the site to site vpn , you will need to use dhcp option 66 on lan b

not sure why you installed a sbc server on the same network as the 3cx server, it is not required as you setup the phone as local lan

 

[Keith Gauci]

Do you have the port on your switch set correctly(I would assume, trunk port) for the HyperV host? In the virtual switch on the host do you have the VLANs defined?

hmm this makes sense. I just created an external virtual switch. I will check how and what needs to be done. As thinking about it, the virtual switch is the "additional" piece I added when I migrated the 3cx on a VM.

Thank you!

 

[Keith Gauci]

Unless you are passing pnp traffic down the site to site vpn , you will need to use dhcp option 66 on lan b

not sure why you installed a sbc server on the same network as the 3cx server, it is not required as you setup the phone as local lan

Hi,

I will implement the DHCP option 66. Re the sbc server I don't have it installed.