BigIron RX Series Configuration Guide 59353-1001986-01PIM dense 23The primary difference between PIM DM V1 and V2 is the methods the protocols use formessaging:• PIM DM V1 – uses the IGMP to send messages.• PIM DM V2 – sends messages to the multicast address 224.0.0.13 (ALL-PIM-ROUTERS) withprotocol number 103.The CLI commands for configuring and managing PIM DM are the same for V1 and V2. The onlydifference is the command you use to enable the protocol on an interface.NOTEIf you want to continue to use PIM DM V1 on an interface, you must change the version, then savethe configuration.NOTEThe note above does not mean you can run different PIM versions on devices that are connected toeach other. The devices must run the same version of PIM. If you want to connect a device runningPIM to a device that is running PIM V1, you must change the PIM version on the device to V1 (orchange the version on the device to V2, if supported).Configuring PIM DMNOTEThis section describes how to configure the “dense” mode of PIM, described in RFC 1075. Refer to“Configuring PIM Sparse” on page 599 for information about configuring PIM Sparse.Enabling PIM on the router and an interfaceBy 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.• Reload the software to place PIM into effect.Suppose you want to initiate the use of desktop video for fellow users on a sprawling campusnetwork. All destination workstations have the appropriate hardware and software but the Brocaderouters that connect the various buildings need to be configured to support PIM multicasts fromthe designated video conference server as shown in Figure 90 on page 591.PIM is enabled on each of the Brocade routers shown in Figure 90, on which multicasts areexpected. You can enable PIM on each router independently or remotely from one of the routerswith a Telnet connection. Follow the same steps for each router. A reset of the router is requiredwhen PIM is first enabled. Thereafter, all changes are dynamic.Globally enabling and disabling PIMTo globally enable PIM, enter the following command.BigIron RX(config)# router pimSyntax: [no] router pimThe behavior of the [no] router pim command was as follows:
