PIM Edge Mode is a subset of PIM that operates with the following restrictions:
- The switch does not act as a candidate rendezvous point (CRP).
- The switch does not act as a candidate bootstrap router (CBSR).
- At most, four active PIM-SM interfaces are permitted. There is no restriction on the number of passive interfaces (within the limit of the maximum IP interfaces).
- Only PIM Sparse Mode (PIM-SM) is supported.
Active PIM interfaces can have other PIM enabled routers on them. Passive interfaces should only have hosts sourcing or receiving multicast traffic. If another PIM router is connected to a multi-access VLAN then passive mode should not be enabled for that respective VLAN.