cucm 8.6 and InformaCast Paging

[Nkechi Latunji]

Hi

I have configured inforaCast Paging and my network for multicasting. I test my multicasting by using the igmp join-group x.x.x.x and was able to ping the multicast ip address from the subnet of the multicast source.

When i page, all the ip phones in the page group have their mute button light Up, but no audio. Any ideas?

Thanks

Nki

[Manish Gogna]

Hi Nikechi,

Have you taken a capture from the IP phone yet? There is a possibility that the RTP packets are not reaching the IP phone due to a firewall or a routing issue. Please make sure that the UDP ports for RTP are open in the network.

HTH

Manish

[Nkechi Latunji]

Hi,

I have not taken a capture of the ip phone yet. There is no firewall between the ip phones and InformaCast server and i have full ip connectivity and routing between the subnets. The cucm is on the informaCast subnet and no routing issues there. All ports are open internal to the network

[Manish Gogna]

Hi Nkechi,

If you are sure about the network then it becomes even more important to get a capture from the IP phone and filter the packets to see what it is recieving from Informacast IP.

Manish

[Nkechi Latunji]

ok...i will run wireshark

[jsteinhauer]

So, InformaCast uses multicast to send audio from itself to the IP phones.  If you have a layer 3 device (e.g. router or layer 3 switch) in between your InformaCast server and your IP phone, you will need to configure multicast routing on that/those device(s).  Here's a link to our multicast whitepaper that goes through these issues:

http://www.singlewire.com/wp-multicast-informacast.html