Not able to add Multicast Group to NIC

[AMistich]

Hi so I have an issue that I am trying to solve. I searched the forums and internet and followed suggestions in in these two pages https://www.3cx.com/docs/plug-and-play-ip-phone/ and https://www.3cx.com/community/threads/multicast-group-missing-from-nic-driver.61131/ When I ran the netsh command I do not see the multicast group on the NIC for the phone system.

All interfaces are used, I have tried to change the metric from Automatic to 1 for IF 6 and rebooted the system but it did not show up. I tried to follow the suggestions in the plug and play IP Phone page, but it looks to be based off of Windows 7 since Windows 10 removed the adaptors and bindings configuration. To get around this issue I tried to add the route using the route add command but that did not solve the issue. I did a packet capture with Wireshark on the PBX and I am seeing the broadcast from the phone asking to subscribe but no response.

I did find this page https://www.3cx.com/community/threa...ausing-local-provisioning-to-also-fail.61212/ which may explain my problem, but it only gives the solution for a Linux based system. I am using a Windows 10 system for the PBX. Has anyone found a solution to this issue that is Windows 10 based?

Thanks in advance for any help.

 

[Alphabetic]

So, my Win 10 PC didnt have 3CX PBX Installed and the cmd

netsh int ip show joins

showed all my adapters without the 3CX multicast address.

So, I went ahead and installed 3CX and specified my default adapter to be used and now when I run the same command I can see the multicast address in the list.

So, my recommendation would be to backup 3CX, remove it, reinstall it and restore and select your correct network adapter.

Pre 3CX



post 3CX:

 

[AMistich]

So, my recommendation would be to backup 3CX, remove it, reinstall it and restore and select your correct network adapter.

I was hoping for something less drastic but it may be necessary. A vendor initially installed 3cx so they may not have selected the correct NIC. I will have to do this after hours so won't be able to try this very quickly.