Preparations Before Configuring Pim-Sm - 3Com 5500-SI Configuration Manual

Preparations before
Configuring PIM-SM
Configuring PIM-SM
Configuring Candidate RPs
In a PIM-SM network, multiple RPs (candidate-RPs) can be configured. Each
Candidate-RP (C-RP) is responsible for forwarding multicast packets with the
destination addresses in a certain range. Configuring multiple C-RPs is to implement
load balancing of the RP. These C-RPs are equal. All multicast routers calculate the RPs
corresponding to multicast groups according to the same algorithm after receiving
the C-RP messages that the BSR advertises.
It should be noted that one RP can serve multiple multicast groups or all multicast
groups. Each multicast group can only be uniquely correspondent to one RP at a time
rather than multiple RPs.
Configuring BSRs
The BSR is the management core in a PIM-SM network. Candidate-RPs send
announcement to the BSR, which is responsible for collecting and advertising the
information about all candidate-RPs.
It should be noted that there can be only one BSR in a network but you can configure
multiple candidate-BSRs. In this case, once a BSR fails, you can switch over to another
BSR. A BSR is elected among the C-BSRs automatically. The C-BSR with the highest
priority is elected as the BSR. If the priority is the same, the C-BSR with the largest IP
address is elected as the BSR.
Configuring Static RP
The router that serves as the RP is the core router of multicast routes. If the dynamic
RP elected by BSR mechanism is invalid for some reason, the static RP can be
configured to specify RP. As the backup of dynamic RP, static RP improves network
resilience and enhances the operation and management capability of multicast
network.
PIM-SM basic configuration includes:
Enabling Multicast
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Enabling PIM-SM
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Configuring the PIM-SM Domain Border
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Entering the PIM View
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Configuring Candidate-BSRs
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Configuring Candidate-RPs
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Configuring Static RP
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PIM-SM advanced configuration includes:
Configuring the Sending Interval for the Hello Packets of the Interface
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Configuring the Filtering of Multicast Source/Group
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Configuring the Filtering of PIM Neighbor
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Configuring the Maximum Number of PIM Neighbor on an Interface
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Configuring RP to Filter the Register Messages Sent by DR
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Limiting the Range of Legal BSR
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Limiting the Range of Legal C-RP
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Clearing Multicast Route Entries from PIM Routing Table
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PIM-SM Overview 341