Pim Sparse Router Types - Foundry Networks Switch and Router Installation And Configuration Manual

Foundry Switch and Router Installation and Configuration Guide
8. Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change
to the startup-config file on the device's flash memory.
PIM Sparse Overview
Software release 06.5.00 contains support for Protocol Independent Multicast (PIM) Sparse version 2. PIM
Sparse provides multicasting that is especially suitable for widely distributed multicast environments. The
Foundry implementation is based on RFC 2362.
In a PIM Sparse network, a PIM Sparse router that is connected to a host that wants to receive information for a
multicast group must explicitly send a join request on behalf of the receiver (host).
PIM Sparse routers are organized into domains. A PIM Sparse domain is a contiguous set of routers that all
implement PIM and are configured to operate within a common boundary. Figure 18.3 shows a simple example of
a PIM Sparse domain. This example shows three BigIron Layer 3 Switches configured as PIM Sparse routers.
The configuration is described in detail following the figure.
Port 3/8
207.95.8.1
BigIron
PIM Sparse router A
209.157.24.162
Source for Group
239.255.162.1
Figure 18.3 Example PIM Sparse domain

PIM Sparse Router Types

Routers that are configured with PIM Sparse interfaces also can be configured to fill one or more of the following
roles:
• PMBR – A PIM router that has some interfaces within the PIM domain and other interface outside the PIM
domain. PBMRs connect the PIM domain to the Internet.
NOTE: You cannot configure a Foundry routing interface as a PMBR interface for PIM Sparse in the current
software release.
18 - 12
PIM Sparse router B
Port 2/1
207.95.8.10
Rendezvous Point (RP) path
VE 1
207.95.6.1
Shortest Path Tree (SPT) path
This interface is also the
Bootstrap Router (BR) for
this PIM Sparse domain, and
BigIron
the Rendezvous Point (RP) for the
PIM Sparse groups in this domain.
Port 2/2
207.95.7.1
VE 1
207.95.6.2
Port 3/8
207.95.7.2
BigIron
PIM Sparse router C
Receiver for Group
239.255.162.1
December 2000