pim bfd

Function

The pim bfd command adjusts the PIM BFD parameters on an interface.

The undo pim bfd command restores the default values of PIM BFD parameters.

Format

pim bfd { min-tx-interval tx-value | min-rx-interval rx-value | detect-multiplier multiplier-value } ^*

undo pim bfd { min-tx-interval | min-rx-interval | detect-multiplier } ^*

undo pim bfd { min-tx-interval tx-value | min-rx-interval rx-value | detect-multiplier multiplier-value } ^*

Parameters

Parameter	Description	Value
min-tx-interval tx-value	Specifies the minimum interval for transmitting BFD packets.	The value is an integer ranging from 100 to 1000, in milliseconds. The default value is 1000.
min-rx-interval rx-value	Specifies the minimum interval for receiving BFD packets.	The value is an integer ranging from 100 to 1000, in milliseconds. The default value is 1000.
detect-multiplier multiplier-value	Specifies the local multiplier of BFD packets.	The value is an integer that ranges from 3 to 50. The default value is 3.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

In application, you can continuously configure one or more parameters. If some parameters are configured, other parameters that are not configured reserve the existing configurations.

The value ranges and default values of BFD parameters are defined uniformly in the BFD module. The values vary with products.

The minimum values of tx-value and rx-value vary with products. You are recommended to set the two values to be equal to or greater than 100. Otherwise, the BFD session flapping may occur.

The two ends negotiate the actual sending interval and receiving interval, and detection period of BFD packets based on the following negotiation mechanism:

Actual sending interval and receiving interval:
- Actual sending interval = Max (local min-tx-interval, remote min-rx-interval)
- Actual receiving interval = Max (remote min-tx-interval, local min-rx-interval)
Actual detection period = remote detect-multiplier * Max (remote min-tx-interval, local min-rx-interval)

BFD parameters can be configured on both the receive and transmit ends, and the configurations on the two ends are both effective.

Example

# Adjust the minimum interval for transmitting BFD packets on GE 1/0/1.

<sysname> system-view
[sysname] interface GigabitEthernet 0/0/1
[sysname-GigabitEthernet0/0/1] pim bfd min-tx-interval 100