I’m missing a link when it comes to multicast at layer 2.
The goal is to connect a receiver to a server. The receiver is connected to a port on a layer 2 switch using VLAN 100 and the switch connects to another switch using a DOT1Q trunk. The upstream trunk connects to another Core switch using EIGRP.
The Core switch then connects to another site Via EIGRP and then to a switch using DOT1Q and then to the MCAST Server on vlan 110.
RCVR-> vlan100- SWA-> dot1q- SWB-> EIGRP- CoreSW->EIGRP (MAN L2) - HUBCoreSW->dot1q-SW1->vlan110- MCAST Server
NOTE: CoreSW is the RP & PIM sparse-mode is used
It is my understanding that IGMP works on Layer 2 to get the MCAST traffic to the Layer 3 device.
in this case SWA to SWB IGMP is used. from SWB to CoreSW & HUBCoreSW PIM is used.
The SWB RP then sends MCAST traffic to HUBCoreSW and the HUBCoreSW sends to SW1
Do i need to turn on IP PIM sparse-mode for
The part i’m missing:
- Am i required to enable sparse mode on the VLAN 100 ON SWB where the SVI is located
- Am i required to enable spare mode on VLAN 100 on SW1 where the SVI is located
- The layer 2 switches should be ok the way they are with IGMP version 2 enabled
I have read the layer 2 lessons and will read again. I’m just so unclear on when to enable sparse-mode on the SVI or if there is something i’m missing.
Hopefully the example makes sense and you are able to understand my question.
Clear as Mud as it may be. lol.
Just looking for light to be shed. Thanks in advance for your help.