What is sparse-dense mode?
Sparse-dense mode, as the name implies, allows the interface to operate on a per-group basis in either sparse or dense mode. A group specified as dense is not mapped to an RP. Instead, data packets destined for that group are forwarded by means of PIM dense-mode rules.
What is ip PIM sparse-dense mode in Cisco?
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.
What is RP in sparse mode?
If a multicast group has a known RP, the interface is treated in sparse mode. If a group has no known RP, the interface is treated in dense mode and data will be flooded over this interface. To successfully implement Auto-RP and prevent any groups other than 224.0.
How does PIM Sparse Mode work?
A Protocol Independent Multicast (PIM) sparse-mode domain uses reverse-path forwarding (RPF) to create a path from a data source to the receiver requesting the data. When a receiver issues an explicit join request, an RPF check is triggered.
What is the difference between sparse and dense mode?
One of the primary difference between Dense and Sparse mode is the multicast technique used. In Dense mode packets are flooded to the entire network and then branches where there are no receivers are eliminated. In Sparse mode packets branches distribution growth as new nodes join the multicast group.
Which multicast group is used for all PIM routers?
All PIM protocols share a common control message format. PIM control messages are sent as raw IP datagrams (protocol number 103), either multicast to the link-local ALL PIM ROUTERS multicast group, or unicast to a specific destination.
Should IGMP snooping be enabled?
When to Enable IGMP Snooping for Home Use For a home based network, you should enable it when you frequently use any kind of streaming or mirroring from your devices to stream to Apple TV or Chromecast. In some brand firmware such as Asus, enabling IGMP Snooping can fix some of the Apple TV Airplay mirroring issues.
How does IP PIM Sparse-Dense Mode work?
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 is an interface treated in Sparse Mode?
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. You must have a rendezvous point (RP) if the interface is in sparse-dense mode and you want to treat the group as a sparse group.
What are the modes of Multicast PIM Sparse?
Multicast PIM has three modes: 1 PIM sparse mode: this is a “pull” model where we only forward multicast traffic when requested. 2 PIM dense mode: this is a “push” model where we flood multicast traffic everywhere and then prune it when it’s not… More
Why is border interface important in PIM Sparse Mode?
A border interface in a PIM sparse mode domain requires precautions to prevent exchange of certain traffic with a neighboring domain reachable through that interface, especially if that domain is also running PIM sparse mode.