3Com Switch 8800 Configuration Guide Chapter 28 PIM-DM Configuration28-7Table 28-9 Displaying and debugging PIM-DMOperation CommandDisplay the PIM multicast routing tabledisplay pim routing-table [ { { *g[ group-address [ mask { mask-length |mask } ] ] | **rp [ rp-address [ mask{ mask-length | mask } ] ] } |{ group-address [ mask { mask-length |mask } ] | source-address [ mask{ mask-length | mask } ] } * } |incoming-interface { Vlan-interfaceVlan-interface-number | null } |{ dense-mode | sparse-mode } ] *Display the PIM interface information display pim interface [ Vlan-interfaceVlan-interface-number ]Display the information about PIMneighboring routersdisplay pim neighbor [ interfaceVlan-interface Vlan-interface-number ]Display BSR information display pim bsr-infoDisplay RP information display pim rp-info [ group-address ]Enable the PIM debugging debugging pim common { all | event |packet | timer }Disable the PIM debugging undo debugging pim common { all |event | packet | timer }Enable the PIM-DM debuggingdebugging pim dm { alert | all | mbr |mrt | timer | warning | { recv | send }{ all | assert | graft | graft-ack | join |prune } }Disable the PIM-DM debuggingundo debugging pim dm { alert | all |mbr | mrt | timer | warning | { recv |send } { all | assert | graft | graft-ack |join | prune } }28.4 PIM-DM Configuration ExampleI. Networking requirementsLanswitch1 is connected to the multicast source through VLAN-interface 10, connectedto Lanswitch2 through VLAN-interface 11 and connected to Lanswitch3 throughVLAN-interface 12. Through running PIM-DM, you can implement multicast amongRECEIVER 1, RECEIVER 12 and Multicast Source.II. Networking diagram