Adjusting C-BSR Parameters

At first, each Candidate-BSR (C-BSR) considers itself as a BootStrap router (BSR) and sends Bootstrap messages to all devices in the network. You can adjust the hash mask length of the C-BSR carried in a Bootstrap message, the C-BSR priority, the interval for sending Bootstrap messages, and the holdtime of Bootstrap messages on a device configured with the C-BSR.

Prerequisites

Before adjusting parameters of the C-BSR, complete the following tasks:

Configuring a unicast routing protocol
Configuring Basic PIM-SM Functions

Context

Perform the following steps on the FW configured with the C-BSR:

You can re-set various parameters of a C-BSR. This configuration is optional. If there is no specific requirement, the default values of parameters are recommended.

Procedure

Access the system view.
system-view
Access the PIM view.
pim [ vpn-instance vpn-instance-name ]
Set the hash mask length of a C-BSR.
```
c-bsr hash-length hash-length
```
Set the priority of the C-BSR.
```
c-bsr priority priority
```
Set the interval for the BSR to send Bootstrap messages.
```
c-bsr interval interval
```
Set the time of holding the Bootstrap message received from a BSR.
```
c-bsr holdtime interval
```
The BSR periodically sends a Bootstrap message to the network. After receiving the Bootstrap message, the FWs keep the message for a certain time. During the period, the BSR election stops temporarily. If the Holdtime timer times out, a new round of BSR election is triggered among C-BSRs.

Ensure that the value of c-bsr holdtime is greater than the value of c-bsr interval. Otherwise, the winner of BSR election cannot be fixed.