608 BigIron RX Series Configuration Guide53-1002253-01PIM Sparse23NOTEBrocade recommends that you configure the same BigIron RX as both the BSR and the RP.Current limitationsThe implementation of PIM Sparse in the current software release has the following limitations:• PIM Sparse and regular PIM (dense mode) cannot be used on the same interface.• You cannot configure or display PIM Sparse information using the Web management interface.(You can display some general PIM information, but not specific PIM Sparse information.)Configuring global PIM Sparse parametersNOTEWhen PIM routing is enabled on a BigIron RX, 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.To configure basic global PIM Sparse parameters, enter commands such as the following on eachBigIron RX within the PIM Sparse domain.BigIron RX(config)# router pimSyntax: [no] router pimNOTEYou do not need to globally enable IP multicast routing when configuring PIM Sparse.The command in this example enables IP multicast routing, and enables the PIM Sparse mode of IPmulticast routing. The command does not configure the BigIron RX as a candidate PIM SparseBootstrap Router (BSR) and candidate Rendezvous Point (RP). You can configure a BigIron RX as aPIM Sparse router without configuring the BigIron RX as a candidate BSR and RP. However, if youdo configure the BigIron RX as one of these, Brocade recommends that you configure the BigIronRX as both of these. Refer to “Configuring BSRs” on page 609.Entering a [no] router pim command does the following:• Disables PIM or DVMRP.• Removes all configuration for PIM multicast on a BigIron RX (router pim level) only.Configuring PIM interface parametersAfter you enable IP multicast routing and PIM Sparse at the global level, you must enable it on theindividual interfaces connected to the PIM Sparse network.To enable PIM Sparse mode on an interface, enter commands such as the following.BigIron RX(config)# interface ethernet 2/2BigIron RX(config-if-e10000-2/2)# ip address 207.95.7.1 255.255.255.0BigIron RX(config-if-e10000-2/2)# ip pim-sparseSyntax: [no] ip pim-sparseThe commands in this example add an IP interface to port 2/2, then enable PIM Sparse on theinterface.
