What is PIM dense mode?

What is PIM dense mode?

Protocol Independent Multicast – Dense Mode (PIM-DM) is a data-driven multicast routing protocol, which builds source-based multicast distribution trees that operate on the Flood- and-Prune principle. It requires unicast-reachability information, but does not depend on a specific unicast routing protocol.

What is IP PIM sparse dense mode?

The ‘ip pim sparse-dense mode’ command enables PIM to operate in sparse or dense mode, depending on the multicast group. When you enable sparse-dense mode, the interface is treated as dense mode if the multicast group is in dense mode. If the group is in sparse mode, the interface is treated in sparse mode.

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.

How does PIM Sparse Mode work?

PIM Sparse Mode (PIM-SM) is a multicast routing protocol designed on the assumption that recipients for any particular multicast group will be sparsely distributed throughout the network. In other words, it is assumed that most subnets in the network will not want any given multicast packet.

Why is PIM needed?

At its most basic level, a PIM lets you collect, manage, and enrich your product information, create product catalogs, and distribute information to your sales and eCommerce channels in one place. This is an essential tool for retail businesses in particular that manage products online.

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 does IP PIM do?

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.

What is sparse mode in PIM?

Sparse mode: we don’t forward multicast traffic on any interface until a downstream router requests us to forward it. In this lesson, we’ll take a close look at PIM dense mode. PIM dense mode is a push method where we use source based trees.

What is the default version of Pim on Cisco routers?

The default version on Cisco IOS is version 2. The expiry times is the holddown timer that is counting down. Each time when the router receives a PIM hello packet, it will reset itself to 00:01:45 (105 seconds). Let’s take a look at the multicast routing tables:

What is the difference between sparse mode and dense mode?

Here’s the key difference between sparse and dense mode: Dense mode: we forward multicast traffic on all interfaces until a downstream router requests us to stop fowarding. Sparse mode: we don’t forward multicast traffic on any interface until a downstream router requests us to forward it. In this lesson, we’ll take a close look at PIM dense mode.