Brocade TurboIron 24X Series Configuration Guide - Manual (Page 836)

802 Brocade TurboIron 24X Series Configuration Guide
53-1003053-01
PIM Dense
PIM DM versions
Devices support PIM DM V1 and V2. The default is V2. You can specify the version on an individual
interface basis.
The primary difference between PIM DM V1 and V2 is the methods the protocols use for
messaging:
• PIM DM V1 – uses the Internet Group Management Protocol (IGMP) to send messages
• PIM DM V2 – sends messages to the multicast address 224.0.0.13 (ALL-PIM-ROUTERS) with
protocol number 103
The CLI commands for configuring and managing PIM DM are the same for V1 and V2. The only
difference is the command you use to enable the protocol on an interface.
NOTE
Version 2 is the default PIM DM version. The only difference between version 1 and version 2 is the
way the protocol sends messages. The change is not apparent in most configurations. You can use
version 2 instead of version 1 with no impact to your network. However, if you want to continue to
use PIM DM V1 on an interface, you must change the version, then save the configuration.
NOTE
The note above does not mean you can run different PIM versions on devices that are connected to
each other. The devices must run the same version of PIM. If you want to connect a Layer 3 Switch
running PIM to a device that is running PIM V1, you must change the version on the Layer 3 Switch
to V1 (or change the version on the device to V2, if supported).
Configuring PIM DM
NOTE
This section describes how to configure the “dense” mode of PIM, described in RFC 1075. Refer to
“Configuring PIM Sparse” on page 808 for information about configuring PIM Sparse.
Enabling PIM on the router and an interface
By default, PIM is disabled. To enable PIM,perform the following:
• Enable the feature globally.
• Configure the IP interfaces that will use PIM.
• Enable PIM locally on the ports that have the IP interfaces you configured for PIM.
Suppose you want to initiate the use of desktop video for fellow users on a sprawling campus
network. All destination workstations have the appropriate hardware and software but the devices
that connect the various buildings need to be configured to support PIM multicasts from the
designated video conference server as shown in
Figure 104 on page 800.
PIM is enabled on each of the devices shown in Figure 104 , on which multicasts are expected. You
can enable PIM on each router independently or remotely from one of the routers with a Telnet
connection. Follow the same steps for each router. A reset of the router is required when PIM is first
enabled. Thereafter, all changes are dynamic.