Enterasys C3G124-24 - Configuring PIM-SM; Commands; Design Considerations; Purpose

Configuring PIM-SM
Enterasys C3 Configuration Guide 27-37
Configuring PIM-SM
Design Considerations
Enterasys Networks recommends that administrators consider the following recommendations
before configuring the Enterasys C3 for a PIM-SM environment.
• A Enterasys C3 cannot be configured as a Candidate-RP or a Candidate-BSR.
• A Enterasys C3 should not be the first hop router for a multicast stream. In other words, the
multicast stream should not originate on a Enterasys C3.
• A Enterasys C3 should not be positioned in the core of a PIM-SM topology, and should only
be positioned at the edge in a PIM-SM topology. In other words, the Enterasys C3 should only
be used to deliver multicast streams to end clients.
Purpose
To enable and configure Protocol Independent Multicast in Sparse Mode (PIM-SM). This protocol
provides the means of dynamically learning how to forward multicast traffic in an environment
where group members are sparsely located throughout the network and bandwidth is limited. In
situations where members are densely located and bandwidth is plentiful, DVMRP would suffice
(see “Configuring DVMRP” on page 27-25.)
PIM-SM determines the network topology using the underlying unicast routing protocol to build
a Multicast Routing Information Base (MRIB).
Commands
* Advanced License Required *
PIM-SM is an advanced routing feature that must be enabled with a license key. If you have purchased an
advanced license key, and have enabled routing on the device, you must activate your license as described in
the chapter entitled “Activating Licensed Features” in order to enable the PIM-SM command set. If you wish
to purchase an advanced routing license, contact Enterasys Networks Sales.
Note: An Enterasys Networks Feature Guide document containing an in-depth discussion of
multicast configuration is located on the Enterasys Networks web site:
https://extranet.enterasys.com/downloads/
Note: IGMP must be enabled on all VLANs running PIM-SM, and must also be globally enabled
on the Enterasys C3. For details on enabling IGMP, refer to Chapter 17.
For information about... Refer to page...
Global configuration commands
ip pimsm 27-38
ip pimsm staticrp 27-38
Interface configuration commands
ip pimsm enable 27-39
ip pimsm query-interval 27-40