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Configuring PIM-SM 139
Repeat this configuration to enable PIM-SM on other interfaces. Only one
multicast routing protocol can be enabled on an interface at a time.
Once enabled, PIM-DM cannot be enabled on the same interface.
Setting the PIM-SM Domain Border
After the PIM-SM domain border is configured, bootstrap messages cannot cross
the border in any direction. In this way, the PIM-SM domain can be split.
Perform the following configuration in VLAN interface view.
By default, no domain border is set. After this configuration is performed, a
bootstrap message cannot cross the border, but other PIM packets can. This
configuration can effectively divide a network into domains using different BSRs.
This command cannot create a multicast packet forwarding border but only a PIM
bootstrap message border.
Entering PIM View
Global parameters of PIM should be configured in PIM view.
Perform the following configuration in system view.
Using undo pim command, you can clear the configuration in PIM view and back
to system view.
Configuring Candidate-BSRs
In a PIM domain, one or more candidate BSRs should be configured. A BSR
(Bootstrap Router) is elected among candidate BSRs. The BSR takes charge of
collecting and advertising RP information.
The automatic election among candidate BSRs is described as follows. One
interface which has started PIM-SM must be specified when configuring the router
as the candidate BSR. At first, each candidate BSR considers itself as the BSR of the
PIM-SM domain, and sends a Bootstrap message by taking the IP address of the
interface as the BSR address. When receiving Bootstrap messages from other
routers, the candidate BSR will compare the BSR address of the newly received
Bootstrap message with that of itself. Comparison standards include priority and
IP address. The bigger IP address is considered better when the priority is the same.
If the new BSR address is better, the candidate BSR will replace its BSR address.
Table 146 Setting the PIM-SM Domain Border
Operation Command
Set the PIM-SM domain border pim bsr-boundary
Remove the PIM-SM domain border
configured
undo pim bsr-boundary
Table 147 Entering PIM View
Operation Command
Enter PIM view pim
Back to system view undo pim