644 CHAPTER 47: PIM CONFIGURATION
Before configuring PIM-SM, prepare the following data:
■ An ACL rule defining a legal BSR address range
■ Hash mask length for RP selection calculation
■ C-BSR priority
■ Bootstrap interval
■ Bootstrap timeout time
■ An ACL rule defining a legal C-RP address range and the range of multicast
groups to be served
■ C-RP-Adv interval
■ C-RP timeout time
■ The IP address of a static RP
■ An ACL rule for register message filtering
■ Register suppression timeout time
■ Probe time
■ ACL rules and ACL order for disabling RPT-to-SPT switchover
Enabling PIM-SM With PIM-SM enabled, a router sends hello messages periodically to discover PIM
neighbors and processes messages from PIM neighbors. When deploying a
PIM-SM domain, you are recommended to enable PIM-SM on all interfaces of
non-border routers (border routers are PIM-enabled routers located on the
boundary of BSR admin-scope regions).
Follow these steps to enable PIM-SM:
c
CAUTION: All the interfaces of the same router must work in the same PIM mode.
Configuring a BSR
n
The BSR is dynamically elected from a number of C-BSRs. Because it is
unpredictable which router will finally win a BSR election, the commands
introduced in this section must be configured on all C-BSRs.
About the Hash mask length and C-BSR priority for RP selection calculation
To do… Use the command… Remarks
Enter system view system-view -
Enable IP multicast routing multicast routing-enable Required
Disable by default
Enter interface view interface interface-type
interface-number
-
Enable PIM-SM pim sm Required
Disabled by default
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