The access lists in this example allow the RPs to be an RP only for the groups you want. Ip pim send-rp-announce loopback0 scope 16
The loopback interface must be PIM-enabled and advertised by an Interior Gateway Protocol (IGP), or it must be reachable with static routing. This is the case even if one or more of its physical interfaces fails. With a loopback interface, it is always up and never goes down, which ensures the RP continues to advertise itself through any available interfaces as an RP. This is not always the case, and the router stops advertising itself as the RP once the physical interface goes down. If you choose a physical interface, you rely on that interface to always be up. For example, the command looks like ip pim send-rp-announce Vlan500 scope 100. If a VLAN interface is used to announce the RP address, then the interface-type option in the ip pim send-rp-announce scope ttl-value command should contain the VLAN interface and the VLAN number. Also, it is possible to use Switched VLAN Interfaces (SVIs). Note that when you choose an interface from which to source RP announcements, Cisco recommends that you use an interface such as a loopback instead of a physical interface. You can use one RP that also serves as the mapping agent, or you can configure multiple RPs and multiple mapping agents for redundancy purposes. These discovery messages are used by the remaining routers for their RP-to-group map. The RP mapping agent listens to the announced packets from the RPs, then sends RP-to-group mappings in a discovery message that is sent to 224.0.1.40. The RPs use 224.0.1.39 to send their announcements. You can also use Auto-RP in order to achieve the same setup, which is easier to configure.Īuto-RP requires that you configure the RPs to announce their availability as RPs and mapping agents. This type of static RP configuration requires that all routers in the PIM domain have the same ip pim rp-address address acl commands configured. However, if you want different RPs to handle different groups, you need to configure all routers to include which groups the RPs will serve. You could have one router, either RP 1 or RP 2, be the RP for all groups. You can configure multiple RPs, but there can only be one RP per specific group. Static RP configuration requires that all routers in the PIM domain have the same ip pim rp-address commands configured. In this example, Router A is the RP which is typically the closest router to the source. Note: The "Source" in the examples throughout this document represents the source of multicast traffic, and "Receiver" represents the receiver of multicast traffic. If the group is in sparse-mode (for example, if an RP is known), the interface is treated as sparse-mode. In this mode, the interface is treated as dense-mode if the group is in dense-mode. As of Cisco IOS® Sotware Release 11.1, you can configure the interface commands ip pim dense-mode and ip pim sparse-mode simultaneously with the ip pim sparse-dense-mode command. The common requirement, for all configurations within this document, is to configure multicasting globally and configure PIM on the interfaces. However, if dense mode is desired, configure the global command ip multicast-routing and the interface command ip pim sparse-dense-mode on each interface that needs to process multicast traffic. Dense ModeĬisco recommends that you use Protocol Independent Multicast (PIM) sparse mode, particularly Auto-RP, where possible and especially for new deployments. Refer to Cisco Technical Tips Conventions for more information on document conventions.
CISCO RECEIVER MULTIPLE MONITORS SOFTWARE
This document is not restricted to specific software and hardware versions. Note: Refer to Internet Protocol Multicast documentation for more information. Prerequisites RequirementsĬisco recommends that readers of this document have basic knowledge of Internet Protocol (IP) Multicast.
CISCO RECEIVER MULTIPLE MONITORS HOW TO
This document discusses the basics of how to configure multicast for various networking scenarios.
Applications that take advantage of multicast include video conferencing, corporate communications, distance learning, and distribution of software, stock quotes, and news. IP multicasting is a bandwidth-conserving technology that reduces traffic because it simultaneously delivers a single stream of information to thousands of corporate recipients and homes.