Configure a Candidate BSR on a VLAN
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
Example
Configure a candidate BSR on a VLAN:
Switch:1(config-if)#ip pim bsr-candidate preference 5
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 configure this option to the default value, use the default operator with the command. |