Cisco multicast auto-rp configuration

What is multicast auto RP?

The auto-RP mechanism is one way that a multicast router can learn the set of group-to-RP mappings. Auto-RP automatically distributes mapping information to routing devices. It simplifies use of multiple RPs for different multicast group ranges, thus allowing multiple RPs to act as backups for each other.

How does multicast select RP?

The mapping agent listens to the RP announcement packets from our RP candidates and makes a list of all possible RPs. It will then elect an RP and informs the rest of the network with RP mapping packets that are sent to multicast address 224.0. 1.40.

What is RP in multicast routing?

A rendezvous point (RP) is required only in networks running Protocol Independent Multicast sparse mode (PIM-SM). The protocol is described in RFC 2362. In PIM-SM, only network segments with active receivers that have explicitly requested multicast data will be forwarded the traffic.

Should multicast be enabled?

Even if you are diligent about network security, it helps to add an extra level to your internal videos. Multicast streaming is a far more secure option than using a third-party unicast OTT streaming application to deliver content over the internet. With multicast, you're operating within a secure, private IP network.

What is RP mapping?

RP mapping agents store the information that is embedded in the RP announcements in a cache inside a group-to-RP mapping. The RP mapping agents join a multicast group 224.0. 1.39, where they receive the RP announcements. RP MAs send advertisements to a popular multicast group known as Cisco-RP-Discovery (224.0. 1.40).

What is Autorp?

Auto-RP is a proprietary group discovery and mapping mechanism for IPv4 PIM that is described in cisco-ipmulticast/pim-autorp-spec, Auto-RP: Automatic discovery of Group-to-RP mappings for IP multicast .

What is multicast distribution tree between RP and receiver?

Shared Tree

The RP is the point at which hosts/receivers join to learn of active sources. Multicast sources must transmit their traffic to the RP. When receivers join a multicast group on a shared tree, the root of the tree is always the RP, and multicast traffic is transmitted from the RP down toward the receivers.

Is multicast L2 or L3?

L2 multicast is concerned with delivering the multicast stream within a vlan eg. IGMP snooping etc. L3 multicast is concerned with delivering the multicast stream between vlans eg PIM .

What is RP card in Cisco?

The route processor (RP) card is the system controller for the Cisco CRS 4-slot line card chassis. It performs route processing and distributes forwarding tables to the MSCs. Although the routing system contains two RP cards, only one RP is active at a time.

What is the purpose of RP in PIM?

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 does IP PIM RP address do?

Description. This command specifies the Rendezvous Point (RP) for a particular multicast group.

Should I block multicast traffic?

I would say block it at the edge of your network just to be safe, although by default multicast isn't routed anyway unless you go through extra hoops. Multicast is used quite heavily for mass operating system deployments and streaming broadcast video over a LAN.

What is the purpose of RP in PIM?

What is Autorp?

Should I enable WMF?

WMF uses Internet Group Management Protocol (IGMP) to keep track of the participants of the group. It is commonly enabled in situations when there only interested hosts need to receive a multicast. Enabling this feature is useful to improve wireless connectivity in your network.

Is multicast traffic UDP or TCP?

Unicast uses TCP (Transmission Control Protocol) for communications while multicast communication uses UDP (User Datagram Protocol).

Does multicast work over VPN?

You can configure a Layer 3 VPN to support multicast traffic using the Protocol Independent Multicast (PIM) routing protocol. To support multicast, you need to configure PIM on routers within the VPN and within the service provider's network.

Is multicast L2 or L3?

L2 multicast is concerned with delivering the multicast stream within a vlan eg. IGMP snooping etc. L3 multicast is concerned with delivering the multicast stream between vlans eg PIM .

What is Rp in Cisco router?

Route Processor Overview

The route processor (RP) card is the system controller for the Cisco CRS 4-slot line card chassis. It performs route processing and distributes forwarding tables to the MSCs. Although the routing system contains two RP cards, only one RP is active at a time.

What is RP in PIM Sparse Mode?

PIM Sparse Mode uses a special router called a Rendezvous Point (RP) to connect the flow source or multicast tree to the router next to the wannabe receiver. The RP is typically used only temporarily, as we'll see below. There can be different RP's for different multicast groups, which is one way to spread the load.

What is the IP address for the Cisco RP announce multicast group?

0.39 and 224.0. 1.40, for Auto-RP configuration in order to announce the RP in the multicast group.