tos-exp (BFD session view)

Function

The tos-exp command sets a priority of BFD control packets for a single static BFD session.

The undo tos-exp command restores the default setting.

Format

tos-exp tos-value

undo tos-exp

Parameters

Parameter	Description	Value
tos-value	Specifies the priority of the BFD packet.	It is an integer ranging from 0 to 7. The default value is 7, which is the highest priority.

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Priorities of BFD sessions can be set based on the importance of services bound to BFD sessions. For an important service, run the tos-exp command to set a high priority for BFD control packets. When the system is congested, BFD control packets with a higher priority are preferentially sent.

Precautions

You can configure the priority in static BFD mode but not in dynamic BFD mode.
If the tos-exp command is run in the BFD session view to set a priority and the tos-exp command is run in the BFD view to set a priority, the configuration of the tos-exp command in the BFD session view takes effect.

You are advised to change the default configuration only after you have known the related affects.

Example

# Set the priority of the BFD packet to 5.

<sysname> system-view
[sysname] bfd 100
[sysname-bfd-session-100] tos-exp 5