Multicast Paging Issues and Hyper-V

[tomnorton]

Hi

We are doing some testing with Multicast Paging. We have purchased a Grandstream SIP Speaker and Fanvil PA2 unit to carry out a proof of concept. Both are on the supported list.

You can do a standard page to them, however multicast doesn't work properly. It's very hit and miss if they get the page, and when they do the sound quality is very poor and garbled.

We have discovered the issue appears to be with Hyper-V networking. If we do a multicast page from a standalone Windows PC to the devices on the same subnet it all works fine. However as soon as you try to do it from a VM on Hyper-V it doesn't work.

We have tried it on 2 different Hyper-V clusters we have. One runs 2016 and the other 2019 Server. Both have the same issue.

It's not just an issue with 3CX, we have tried some 3rd party multicast paging software to see if that is any different and we have the same issue.

Just wondering if anyone else has experienced similar issues and if there are some settings we should be changing in Hyper-V?

Thanks

Tom

 

[Alphabetic]

Can I just check that you've followed this guide to set up your VM?

https://www.3cx.com/docs/installing-microsoft-hyper-v/

Specifically, Gen1 VM and also installing the NTP service?

apt update
apt install ntp

Can you also provide more information?

https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

 

[tomnorton]

Hi

Yes, I can confirm that we have followed the above guide for setting up the VM.

Here is our current setup:

• 3CX Version, Enterprise Annual 16.0.9
• Server OS, Windows Server 2016
• Is the 3CX Server Hosted and where? On-Premise Hyper-V. Windows Server 2019
• IP Phone Make/Model/Firmware version, Fanvil PA2 2.8.2.7020
• Provisioning Method: Local
• Has the Firewall Checker passed: YES
• Are custom Phone Templates being used: No

Thanks

Tom

 

[Alphabetic]

Hi

Yes, I can confirm that we have followed the above guide for setting up the VM.

Here is our current setup:

• 3CX Version, Enterprise Annual 16.0.9
• Server OS, Windows Server 2016
• Is the 3CX Server Hosted and where? On-Premise Hyper-V. Windows Server 2019
• IP Phone Make/Model/Firmware version, Fanvil PA2 2.8.2.7020
• Provisioning Method: Local
• Has the Firewall Checker passed: YES
• Are custom Phone Templates being used: No

Thanks

Tom

Do you have any network switches with multicasting properties on?