Johan

@pbxnsip: thx for putting me in the right direction. Problem is now solved, in my post above i didnot see that the wrong nic(Berofix) was joined in the multicast, by increasing the metric of the wrong nic, now the right nic joins the multicast. This remains one question: Why isn't the multicast join created on startup and do i have to restart the snomone service?

I've had a busy time lately, finally got some time to look into this. Multicast is enabled in the SnomOne settings. However whenever i start/restart the machine the join is not created. When restarting the snomone service the join is created and visible in "netsh interface ip show joins". But still the server doesnot react to the multicast.

As you can read in my first post. I turned the firewall off, beside that i see the packets sent from the phone on the server nic with wireshark. The problem is the pbx doesnot react to the multicast.

This was an entirely new install.

Currently i'm testing SnomOne, which went very smoothly on my testsetup in Hyper-v with win2k8r2-x64. So we decided to create a demoserver for our customers, thats where my problems started. The Demo server is a Win7Pro-NL-32bit machine. The server doesnot react to the Multicast from the phones, so no provisioning. I have to put in the HTTP client user/pw and provisioningpath in each phone to get them provisioned. The firewall on the server is turned off. I can see the multicasts from the phones with wireshark on my nic. Can anybody please help me TIA add.info: Server: Win7Pro-NL-32bit Snom version: 2011-4.2.0.3966 (Win32) (also tried 4.2.0.3950) Listen to sip.mcast.net: Yes Bind to MAC Address: <mac> on the extensions All Snom Phones, last firmware (8.4.18)