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What is Cisco IP PIM Sparse Mode?
ip pim sparse-mode command enables your interface (SVI) to participate in sparse mode multicast traffic transmission and multicast shared tree. this way clients in that VLAN are able to receive multicast traffic from different multicast groups (sources) although you can controll it by configuring other parameters.
What is ip PIM sparse?
PIM Sparse Mode. PIM sparse mode (PIM-SM) uses a pull model to deliver multicast traffic. Only network segments with active receivers that have explicitly requested the data will receive the traffic.
What is the role of RP in PIM Sparse Mode?
An RP acts as the meeting place for sources and receivers of multicast data. In a PIM-SM network, sources must send their traffic to the RP. This traffic is then forwarded to receivers down a shared distribution tree.
What is the difference between PIM sparse and dense mode?
PIM Sparse Mode (PIM-SM) explicitly builds unidirectional shared trees rooted at a rendezvous point (RP) per group, and optionally creates shortest-path trees per source. PIM-SM generally scales fairly well for wide-area usage. PIM Dense Mode (PIM-DM) uses dense multicast routing.
How do you set up PIM?
To configure PIM join suppression on a non-RP downstream router in the multicast LAN:
- Configure PIM sparse mode on the interfaces.
- Enable the join suppression timer.
- Configure the prune override interval value.
- Configure the propagation delay of the link.
- (Optional) Configure PIM tracing operations.
What is sparse mode?
Sparse mode. Protocol Independent Multicast – Sparse-Mode (PIM-SM) is a protocol for efficiently routing Internet Protocol (IP) packets to multicast groups that may span wide-area and inter-domain internets.
How do I access PIM?
Add a PIM tile to the dashboard
- Sign in to the Azure portal.
- Select All services and find the Azure AD Privileged Identity Management service.
- Select the Privileged Identity Management Quick start.
- Select Pin blade to dashboard to pin the Privileged Identity Management Quick start page to the dashboard.
What are the major characteristics of PIM Sparse Mode?
The major characteristics of PIM sparse mode are as follows: 1 Routers with downstream receivers join a PIM sparse-mode tree through an explicit join message. 2 PIM sparse-mode RPs are the routers where receivers meet sources. 3 Senders announce their existence to one or more RPs, and receivers query RPs to find multicast sessions.
How does Multicast PIM Sparse Mode work on a router?
Since we are using PIM sparse mode, this router will have to forward the multicast traffic to the RP. Instead of forwarding everything, R1 will only send the first multicast packet. This packet is encapsulated in a PIM register message and forwarded to the RP. Once the RP receives the PIM register message there are two options:
When does PIM Sparse router send a PIM Join message?
To summarize this, PIM sparse routers will send a PIM join message when: The router has received an IGMP membership report from a host on a directly connected interface. The router has received a PIM join from a downstream router. When the RP receives the PIM join, it will start forwarding the multicast traffic.
How does a Multicast PIM Join message work?
It will check its unicast routing table for the IP address of the RP and sends a PIM join message on the interface that is used to reach the RP. In this case, that means the PIM join is forwarded towards R4. When R4 receives the PIM join, it has to request the RP to start forwarding multicast traffic so it will also send a PIM join.