Unable to add Router to Layer 2 Multicast platform

[Drew]

I have a layer 2 network configure for multicast traffic. 

1. I have two switches --3750.   Switch1 is the core switch and switch 2 is trunked from switch 1. 

2. the multicast server is connected to switch 2 via and access port in a vlan...Lets say vlan 5

3. switch 1(core) has various vlans configured on it, to include vlan 5.  The multicast server has an IP in the vlan 5 network and the port on switch 2 is in vlan 5.  Now, because these switches are igmp enabled no need to put PiM protocol.  I just enabled Multicast-Routing on both.

4.  I have a receiver who is in vlan 5 and is able to View the multicast traffic on either switch as long as its assigned to vlan 5.

AT THIS POINT ALL IS WELL!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

*******BEFORE I ADD ANYTHING ELSE NOTE THAT THIS WAS CONFIGURED AS ROUTER ON A STICK WITH SUBINF ON THE ROUTER WITH VLAN 5*****************WORKED WELL BUT IM TRYING TO REMOVE ALL LAYER 2 FUNCTION OFF THE ROUTER, IF POSSIBLE.

Problem:

With the same setup I want to add the router to the multicast tree so that the ports on the router will participate and I can add a switch to the router and a receiver can access the multicast traffic. 

1.  on switch 1 added ip routing and made one of the ports a routed port to the router.  so switch port gi1/0/24 and router port gi0/0 are now in the same /29 network.

2. I have enabled PIM Dense-mode on both ports: gi1/0/24 and Rtr gi0/0.  I have also added ip igmp join for my multicast address.

3. On the router I have enabled multicast-routing.   I have also added ip igmp join for my multicast address on gi0/0

4. I repeated the same on gi0/1: PIM dense, ip igmp join,  multicast-routing, and Ipaddr to another network.   this is where I want to add another switch.  but at the moment I have a test laptop running VLC to receive the traffic to no avail.

Im not even sure if this is possible but I wanted to reach out to see if this is even possible since the Mserver is on a switch this time as oppose to have  a multicast server on the router casting down to the switches.

I also tried adding ip igmp snooping quirer on the router .. still a no go..

Any advice!!!!! thanks

[Jon Marshall]

Not sure I follow.

PIM on a L3 interface will allow multicast traffic to be routed through that interface.

So you enabled PIM on the router and the L3 switch routed port to the router but you did not enable it on the SVI for vlan 5 because it wasn't allowed ie. your switch only supports limited multicast routing functionality.

But it does allow you to add PIM in passive mode. What this does is stop any PIM messages being sent into vlan 5 which means you can't have any other L3 devices in vlan 5 running PIM.

In effect it is saying there is only one way out of that vlan for multicast traffic and that is via the SVI.

Does this make sense ?

Jon

[Drew]

Makes since but not clearly.  So since we made Pim passive on that svi int. its telling that so either send and receive or receive and not send PIM message. so in this case send PIM message out of vlan 5 to other interfaces so that other requester can now see the pim messages.  Im just thinking along the lines of passive interfaces with eigrp and ospf.   but I think I get the gist of it due to the limits of my switch.

[Jon Marshall]

It is basically saying you cannot send or receive PIM messages in that vlan ie. vlan 5 in your case.

But it still allows multicast routing between the SVI and other PIM enabled interfaces on the switch otherwise you wouldn't have got the stream to work.

It is slightly confusing but then to be honest so is multicast in general :-)

Jon

[Drew]

Make Sense!!!!!!

Now I get to explain this to my grasshoppers!

Thanks and enjoy your day!

[Jon Marshall]

Andrew

Can you add this to the SVI for vlan 5 -

"ip pim passive"

Jon