Operation Manual – MulticastH3C S7500 Series Ethernet Switches Chapter 7 PIM Configuration7-15To do... Use the command... RemarksLimit the range ofvalid C-RPs crp-policy acl-numberOptionalz You can configure to filter theIP addresses of somemulticast groups in an ACL.z By default, the range of validC-RPs is not set for theswitch.Caution:z Only one candidate BSR can be configured on a Layer 3 switch. The BSRconfiguration on another interface will replace the former configuration.z You are recommended to configure both the candidate BSR and candidate RPs ona Layer 3 switch in the backbone network.z If the range of multicast groups that the RP serves is not specified when the RP isconfigured, the RP serves all multicast groups. Otherwise, the RP serves themulticast groups within the specified range.z You can configure basic ACLs to filter related multicast IP addresses and control therange of multicast groups that the RP serves.z If you use static RPs, all routers in the PIM domain must adopt the sameconfiguration.z If the configured static RP address is the address of an up interface on the localswitch, the switch will serve as a static RP.z Static RPs do not take effect until the RP generated by the BSR mechanism takeseffect.z The PIM protocol need not be enabled on the interfaces of static RPs.z The limit on the range of valid BSRs is to prevent the valid BSRs in the networkbeing replaced maliciously. The other BSR information except the range will not bereceived by the Layer 3 switch, and thus the security of BSRs in the network isprotected.z The limit on the range of C-RPs is to avoid C-RP cheating. You can limit the range ofvalid C-RPs and limit the range of multicast groups that each C-RP serves.7.4.3 Configuring PIM-SM Domain BoundaryFollow these steps to configure PIM-SM domain boundary:
