Multicast Network - Basic Informacast Paging

[Network Admin]

Can anyone explain only the mandatory or the minimum configuration for preparing Multicast environment for basic informacast paging. How to prepare the network for Multicast Environment. Here in this scenario , we have a plane network where all the IP Phones/ Computers/Voice Gateway/UC APPLICATIONS all are in the same vlan or same subnet of 10.10.10.0 /24 .  Is there any special command and configuration that has to be done on the Switches for basic paging ?

[Terry Cheema]

If there is no layer 3 device anywhere in between and everything is in same VLAN, multicast should work without any configuration. The multicast traffic should be flooded to all ports in the VLAN (unless IGMP snooping is turned On). In this case you dont need to do anything much, you can even turn off IGMP snooping to let the switch flood multicast traffic to all ports in the VLAN if the multicast traffic is low (cmd: no igmp snooping)

So to summarize in above scenario:

1) Test without adding in any configuration

2) If its failing anywhere temporarily turn off IGMP Snooping and test again.

For a scenario with L3 devices involved, at a high level, below configuration will be needed:

On routers:

ip multicast-routing

ip pim rp-address 1.1.1.1    << SVI interface for Voice Vlan

On L3 Switches:

Int VLAN X

ip pim sparse-dense mode

But in your case, it seems, it should work without any configuration.

-Terry

[Network Admin]

Hey Terry Cheema    

We have a new setup , where we have  :-

1. Informacast Paging Server in Vlan 10  of Core Switch  ( Paging Server IP : 10.10.10.18 )

    Server Vlan SVI IP Address  -  10.10.10.1 (Core Switch 6509 )

2. IP Phone in Vlan 20 of Access Switch ( Access Switch 3750 Switch Connected to Core Switch )

    Voice Vlan SVI IP address    - 10.10.20.1 ( Core Switch 6509 )