Configure a Candidate BSR on a Port

Configure additional routers as candidate BSRs (C-BSR) to provide backup protection in the event that the primary BSR fails. PIM-SM cannot run without a BSR.

Before you begin

Static RP is disabled.

About this task

The C-BSR with the highest configured preference becomes the BSR for the domain. If two C-BSRs use equal preference, the candidate with the higher IP address becomes the BSR. If you add a new C-BSR with a higher preference to the domain, it automatically becomes the new BSR.

Procedure

Enter GigabitEthernet Interface Configuration mode:

enable

configure terminal

interface GigabitEthernet {slot/port[/sub-port][-slot/port[/sub-port]][,...][slot/all][all]}

Note

If the platform supports channelization and the port is channelized, you must also specify the sub-port in the format slot/port/sub-port.
Configure a candidate BSR:

ip pim bsr-candidate preference <0–255>

Example

Configure a candidate BSR:

Switch:1(config-if)#ip pim bsr-candidate preference 2

Variable definitions

Use the definitions in the following table to use the ip pim bsr-candidate command.


Variable	Value
preference `<0–255>`	Activates the C-BSR on this interface and configures its preference value, from 0–255, to become a BSR. The C-BSR with the highest BSR preference and address is the preferred BSR. The default is –1, which indicates that the current interface is not a C-BSR. To set this option to the default value, use the default operator with the command.