3Com Switch 8800 Advanced Software V5 Configuration Guide

588 CHAPTER 42: PIM CONFIGURATION
Configuration
Prerequisites
Before configuring PIM common information, complete the following tasks:
■ Configure any unicast routing protocol so that all devices in the domain are
interoperable at the network layer.
■ Configure PIM-DM, or PIM-SM
Before configuring PIM common information, prepare the following data:
■ An ACL rule as multicast data filter
■ Priority for DR election (global value/interface level value)
■ PIM neighbor timeout time (global value/interface value)
■ Prune delay (global value/interface level value)
■ Prune override interval (global value/interface level value)
■ Hello interval (global value/interface level value)
■ Maximum delay between hello message (interface level value)
■ Assert timeout time (global value/interface value)
■ Join/prune interval (global value/interface level value)
■ Join/prune timeout (global value/interface value)
■ Multicast source lifetime
■ Maximum size of join/prune messages
■ Maximum number of (S, G) entries in a join/prune message
Configuring a PIM Filter No matter in a PIM-DM domain or a PIM-SM domain, devices can check
passing-by multicast data based on the configured filtering rules and determine
whether to continue forwarding the multicast data. In other words, PIM devices
can act as multicast data filters. These filters can help implement traffic control on
one hand, and control the information available to receivers downstream to
enhance data security on the other hand.
Follow these steps to configure a PIM filter:
n
Generally, a smaller distance from the filter to the multicast source results in a
more remarkable filtering effect.
“Configuring Join/Prune Message Limits” on page 592 Optional
Task Remarks
To do... Use the command... Remarks
Enter system view system-view -
Enter PIM view pim -
Configure a multicast group
filter
source-policy acl-number Required
No multicast data filter by
default