Configuring Pim-Sm Domain Boundary - H3C S7500 Series Operation Manual

Operation Manual – Multicast
H3C S7500 Series Ethernet Switches
To do...
Limit the range of
valid C-RPs
Caution:
Only one candidate BSR can be configured on a Layer 3 switch. The BSR
configuration on another interface will replace the former configuration.
You are recommended to configure both the candidate BSR and candidate RPs on
a Layer 3 switch in the backbone network.
If the range of multicast groups that the RP serves is not specified when the RP is
configured, the RP serves all multicast groups. Otherwise, the RP serves the
multicast groups within the specified range.
You can configure basic ACLs to filter related multicast IP addresses and control the
range of multicast groups that the RP serves.
If you use static RPs, all routers in the PIM domain must adopt the same
configuration.
If the configured static RP address is the address of an up interface on the local
switch, the switch will serve as a static RP.
Static RPs do not take effect until the RP generated by the BSR mechanism takes
effect.
The PIM protocol need not be enabled on the interfaces of static RPs.
The limit on the range of valid BSRs is to prevent the valid BSRs in the network
being replaced maliciously. The other BSR information except the range will not be
received by the Layer 3 switch, and thus the security of BSRs in the network is
protected.
The limit on the range of C-RPs is to avoid C-RP cheating. You can limit the range of
valid C-RPs and limit the range of multicast groups that each C-RP serves.

7.4.3 Configuring PIM-SM Domain Boundary

Follow these steps to configure PIM-SM domain boundary:
Use the command...
crp-policy acl-number
7-15
Chapter 7 PIM Configuration
Remarks
Optional
You can configure to filter the
IP addresses
multicast groups in an ACL.
By default, the range of valid
C-RPs is not set for the
switch.
of some