Quick Reference Guide

478 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
PIM Sparse
19
Syntax: ip pim ttl <1-31>
Dropping PIM traffic in hardware
Unwanted PIM Dense or PIM Sparse multicast traffic can be dropped in hardware on Layer 3
Switches. . Refer to “Passive multicast route insertion” on page 501.
PIM Sparse
Devices support Protocol Independent Multicast (PIM) Sparse version 2. PIM Sparse provides
multicasting that is especially suitable for widely distributed multicast environments. The Dell
implementation is based on RFC 2362.
NOTE
On PowerConnect B-Series TI24X devices, this feature is supported.
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 87
shows a simple example of a PIM Sparse domain. This example shows three Layer 3 Switches
configured as PIM Sparse routers. The configuration is described in detail following the figure.
FIGURE 87 Example of a PIM Sparse domain
PIM Sparse switch types
Switches that are configured with PIM Sparse interfaces also can be configured to fill one or more
of the following roles:
PIM Sparse
Switch B
Port 1
207.95.8.10
Port 2
207.95.7.1
Rendezvous Point (RP) path
Port 8
207.95.8.1
Port 8
207.95.7.2
VE 1
207.95.6.1
VE 1
207.95.6.2
Shortest Path Tree (SPT) path
PIM Sparse
Switch A
PIM Sparse
Switch C
209.157.24.162
Source for Group
239.255.162.1
Receiver for Group
239.255.162.1
This interface is also the
Bootstrap Router (BR) for
this PIM Sparse domain, and
the Rendezvous Point (RP) for the
PIM Sparse groups in this domain.