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PIM Dense 3<br />
Enabling PIM on the device and an interface<br />
By default, PIM is disabled. To enable PIM:<br />
• Enable the feature globally.<br />
• Configure the IP interfaces that will use PIM.<br />
• Enable PIM locally on the ports that have the IP interfaces you configured for PIM.<br />
Suppose you want to initiate the use of desktop video for fellow <strong>user</strong>s on a sprawling campus<br />
network. All destination workstations have the appropriate hardware and software but the devices<br />
that connect the various buildings need to be configured to support PIM multicasts from the<br />
designated video conference server as shown in Figure 3 on page 73.<br />
PIM is enabled on each of the devices shown in Figure 3, on which multicasts are expected. You<br />
can enable PIM on each device independently or remotely from one of the devices with a Telnet<br />
connection. Follow the same steps for each device. All changes are dynamic.<br />
Globally enabling and disabling PIM<br />
To globally enable PIM, enter the following command.<br />
<strong>Brocade</strong>(config)# router pim<br />
Syntax: [no] router pim<br />
The [no] router pim command behaves in the following manner:<br />
• Entering router pim command to enable PIM does not require a software reload.<br />
• Entering a no router pim command removes all configuration for PIM multicast on a device<br />
(router pim level) only.<br />
Enabling PIM for a specified VRF<br />
To enable PIM for the VRF named “blue”, use the following commands.<br />
<strong>Brocade</strong>(config)# router pim vrf blue<br />
Syntax: [no] router pim [vrf vrf-name]<br />
The vrf parameter allows you to configure PIM (PIM-DM and PIM-SM) on the virtual routing instance<br />
(VRF) specified by the vrf-name variable. All PIM parameters available for the default device<br />
instance are configurable for a VRF-based PIM instance.<br />
The [no] router pim vrf command behaves in the following manner:<br />
• Entering the router pim vrf command to enable PIM does not require a software reload.<br />
• Entering a no router pim vrf command removes all configuration for PIM multicast on the<br />
specified VRF.<br />
Enabling a PIM version<br />
To enable PIM on an interface, globally enable PIM, then enable PIM on interface 3, enter the<br />
following commands.<br />
<strong>Brocade</strong>(config)# router pim<br />
<strong>Brocade</strong>(config)# int e 1/3<br />
<strong>Brocade</strong>(config-if-e10000-1/3)# ip address 207.95.5.1/24<br />
<strong>Brocade</strong>(config-if-e10000-1/3)# ip pim<br />
<strong>Brocade</strong>(config-if-e10000-1/3)# write memory<br />
<strong>Brocade</strong>(config-if-e10000-1/3)# end<br />
FastIron Ethernet Switch IP Multicast Configuration Guide 75<br />
53-1002638-02
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