What is PIM network?

Protocol-Independent Multicast (PIM) is a family of multicast routing protocols for Internet Protocol (IP) networks that provide one-to-many and many-to-many distribution of data over a LAN, WAN or the Internet.

How does PIM-SM work?

PIM-SM uses shared trees by default and implements source-based trees for efficiency; it assumes that no hosts want the multicast traffic unless they specifically ask for it. It creates a shared distribution tree centered on a defined rendezvous point (RP). Traffic from this source is relayed to the receivers.

What is the purpose of an RP in PIM?

The RP is the multicast router that is the root of the PIM-SM shared multicast distribution tree. D. The RP responds to the PIM join messages with the source of a requested multicast group.

What is multicast FHR?

Multicast delivers application source market data feeds to multiple receivers without burdening the source or the receivers, while using a minimum of network bandwidth. In this configuration example for multicast deployment, the QFX5100 devices serve as the last-hop router (LHR) and first-hop router (FHR).

What is a PIM join message?

When a receiver starts to require data from a PIM-SM network, the receiver’s DR sends a Join message through the reverse path forwarding (RPF) interface towards the RP to instruct the upstream neighbor to forward packets to the receiver. The Join message is sent in the upstream direction hop by hop to set up an RPT.

What is a PIM-SM domain?

In a given PIM-SM domain, routers identified as DRs, RPs, and a BSR participate in delivering multicast traffic to the IP multicast receivers that request it. This approach avoids the flooding method of distributing multicast traffic (employed by PIM-DM) and is best suited for lower bandwidth situations.

What is the difference between IGMP and PIM?

IGMP snooping allows a device to only forward multicast streams to the links on which they have been requested. PIM Sparse mode requires specific designated routers to receive notification of all streams destined to specific ranges of multicast addresses.

Which multicast group is used for all PIM routers?

Configuration. R1, R2, R3 and R4 are our multicast routers that we will configure for PIM sparse mode. S1 will be the source that sends multicast traffic. H3 and H4 are two receivers.

How does SSM multicast work?

In SSM, multicast traffic from each individual source will be transported across the network only if it was requested (through IGMPv3, IGMP v3lite, or URD memberships) from a receiver. In contrast, ISM forwards traffic from any active source sending to a multicast group to all receivers requesting that multicast group.

Why do we need multicast?

Using multicast, a source can send a single copy of data to a single multicast address, which is then distributed to an entire group of recipients. A multicast group identifies a set of recipients that are interested in a particular data stream, and is represented by an IP address from a well-defined range.