Complete Protocol dictionary, glossary and reference
BIDIR-PIM: Bi-directional PIM
Bi-directional PIM (BIDIR-PIM) is one of the Protocol Independent Multicast (PIM) protocols based on PIM-SM. The main difference of BIDIR-PIM from PIM-SM is in the method used to send data from a source to the RP. Whereas in PIM-SM data is sent using either encapsulation or a source-based tree, in BIDIR-PIM the data flows to the RP along the shared tree, which is bi-directional. The main advantage of BIDIR-PIM is that it scales very well when there are many sources for each group. However, the lack of source-based trees means that traffic is forced to remain on the possibly inefficient shared tree. BIDIR-PIM is not used often in real world.