Brocade Multi-Service IronWare Multicast Configuration Guide (Supporting R05.6.00) - Manual (Page 40)

28 Multi-Service IronWare Multicast Configuration Guide
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PIM Dense
1
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
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 Brocade device
running PIM to a device that is running PIM V1, you must change the PIM version on the Brocade
device 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” for information about configuring PIM Sparse.
Enabling PIM on the device and an interface
By default, PIM is disabled. To enable PIM:
• 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 5 .
PIM is enabled on each of the devices shown in Figure 5 , on which multicasts are expected. You
can enable PIM on each device independently or remotely from one of the devices with a Telnet
connection. Follow the same steps for each device. All changes are dynamic.
Globally enabling and disabling PIM
To globally enable PIM, enter the following command.
Brocade(config)# router pim
Syntax: [no] router pim
NOTE
When PIM routing is enabled, the line rate for receive traffic is reduced by about 5%. The reduction
occurs due to overhead from the VLAN multicasting feature, which PIM routing uses. This behavior
is normal and does not indicate a problem with the device.
The [no] router pim command behaves in the following manner:
• Entering router pim command to enable PIM does not require a software reload.
• Entering a no router pim command removes all configuration for PIM multicast on a device
(router pim level) only.