Configuring PIM-SM 643Configuring PIM-DMGraft Retry PeriodIn PIM-DM, graft is the only type of message that uses the acknowledgmentmechanism. In a PIM-DM domain, if a router does not receive a graft-ack messagefrom the upstream router within the specified time after it sends a graft message,the router keeps sending new graft messages at a configurable interval, namelygraft retry period, until it receives a graft-ack from the upstream router.Follow these steps to configure graft retry period:n For the configuration of other timers in PIM-DM, refer to “Configuring PIMCommon Timers” on page 656.Configuring PIM-SMn A device can serve as a C-RP and a C-BSR at the same time.PIM-SM ConfigurationTask ListComplete these tasks to configure PIM-SM:ConfigurationPrerequisitesBefore configuring PIM-SM, complete the following task:■ Configure any unicast routing protocol so that all devices in the domain areinteroperable at the network layer.To do… Use the command… RemarksEnter system view system-view -Enter interface view interface interface-typeinterface-number-Configure graft retry period pim timer graft-retryintervalOptional3 seconds by defaultTask Remarks“Configuring PIM-SM” on page 643 Required“Configuring a BSR” on page 644 “Performing basic C-BSR configuration” onpage 645Optional“Configuring a global-scope C-BSR” on page646Optional“Configuring an admin-scope C-BSR” onpage 646Optional“Configuring a BSR admin-scope regionboundary” on page 647Optional“Configuring global C-BSR parameters” onpage 647Optional“Configuring an RP” on page 648 “Configuring a static RP” on page 648 Optional“Configuring a C-RP” on page 648 Optional“Enabling auto-RP” on page 649 Optional“Configuring C-RP timers” on page 649 Optional“Configuring PIM-SM Register Messages” on page 650 Optional“Disabling RPT-to-SPT Switchover” on page 651 Optional“Configuring PIM Common Information” on page 653 Optional
