Not seeing any multicast traffic

fonestar1978

Hello,

I am trying to setup two 3750's on a multicast network. I have enabled ip multicast routing and ip routing on the switches. I have enabled ip pim dense-mode on the svi's (vlan 1). But when I do "debug ip mpacket", "debug ip packet" and "debug ip mrouting" I am not seeing anything at all.

The two switches are connected via ethernet trunk? Could this be it? They need a L3 path or else a tunnel? Where to start?

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mikej412

What are you using to generate multicast traffic on VLAN 1?

fonestar1978

mikej412 wrote: »

What are you using to generate multicast traffic on VLAN 1?

It is connected to multicasting vhf radios and their controllers by Motorola. I expected to see some hellos and such doing the various debugs but I didn't. When I do a "show ip igmp neighbors" I now see the Motorola.

shodown

Do you have routing between the 2 switches. It can even be a static route. and have you setup igmp snoopoing for the vlan. You should also have PIM between your 2 layer 3 interfaces. I'm still working, but I'll check back in after work, but to sum it up

Setup routing between the devices
have the dense mode command on every layer 3 interface you are using.
You should have a pim neighborship between your 2 layer 3 interfaces
you should have IGMP at layer 2

oxzgan

shodown wrote: »

Do you have routing between the 2 switches. It can even be a static route. and have you setup igmp snoopoing for the vlan. You should also have PIM between your 2 layer 3 interfaces. I'm still working, but I'll check back in after work, but to sum it up

Setup routing between the devices
have the dense mode command on every layer 3 interface you are using.
You should have a pim neighborship between your 2 layer 3 interfaces
you should have IGMP at layer 2

yes exactly