3Com Switch 8800 Configuration Guide Chapter 29 PIM-SM Configuration29-6Operation CommandRemove thecandidate-RP configured undo c-rp { interface-type interface-number | all }When configuring RP, if the range of the served multicast group is not specified, the RPwill serve all multicast groups. Otherwise, the range of the served multicast group is themulticast group in the specified range. It is suggested to configure Candidate RP on thebackbone router.29.2.7 Configuring Static RPStatic RP serves as the backup of dynamic RP, so as to improve network robusticity.Perform the following configuration in PIM view.Table 29-4 Configuring static RPOperation CommandConfigure static RP static-rp rp-address [ acl-number ]Remove the configured static RP undo static-rpBasic ACL can control the range of multicast group served by static RP.If static RP is in use, all routers in the PIM domain must adopt the same configuration. Ifthe configured static RP address is the interface address of the local router whose stateis UP, the router will function as the static RP. It is unnecessary to enable PIM on theinterface that functions as static RP.When the RP elected from BSR mechanism is valid, static RP does not work.29.2.8 Configuring the PIM-SM Domain BorderAfter the PIM-SM domain border is configured, bootstrap messages can not cross theborder in any direction. In this way, the PIM-SM domain can be split.Perform the following configuration in VLAN interface view.Table 29-5 Configuring the PIM-SM domain borderOperation CommandSet the PIM-SM domain border pim bsr-boundaryRemove the PIM-SM domain border configured undo pim bsr-boundary