Pim-Sm Configuration - 3Com 7700 Configuration Manual

PIM-SM Configuration

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.
Configure 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.
PIM-SM configuration includes:
Enable Multicast
■
Enable PIM-SM
■
Configure the interface hello message interval
■
Set the PIM-SM domain border
■
Enter PIM view
■
Configure candidate-BSRs
■
Configure candidate-RPs
■
Configure RP to filter the register messages sent by DR
■
Set the threshold of switchover from the RPT to the SPT
■
The first four items of configuration are mandatory. The remaining can use the
default configuration. It should be noted that at least one router in an entire
PIM-SM domain should be configured with Candidate-RPs and Candidate-BSRs.
Enable Multicast
Refer to "Common Multicast Configuration ".
Enable PIM-SM
This configuration can be effective only after multicast is enabled.
Perform the following configuration in VLAN interface view.
Table 23 Enable PIM-SM
Operation
Enable PIM-SM on an interface
Disable PIM-SM on an interface
Repeat this configuration to enable PIM-SM on other interfaces. Only one
multicast routing protocol can be enabled on an interface at a time.
PIM-SM Configuration
Command
pim sm
undo pim sm
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