car cross-board

Function

The car cross-board command limits the rate of trunk packets and dumb terminal packets.

The undo car cross-board command restores the default rate of trunk packets and dumb terminal packets.

By default, trunk packets and dumb terminal packets are forwarded at the default rate.

Format

car cross-board cir cir-value [ cbs cbs-value ]

undo car cross-board

Parameters

Parameter	Description	Value
cbs cbs-value	Specifies the CBS.	The value is an integer ranging from 1000 to 19200000, in bytes. The default value is 7680000 bytes.
cir cir-value	Specifies the CIR.	The value is an integer that ranges from 0 to 10000000. The default value is 1024000.

Parameter

Description

Value

cbs cbs-value

Specifies the CBS.

The value is an integer ranging from 1000 to 19200000, in bytes. The default value is 7680000 bytes.

cir cir-value

Specifies the CIR.

The value is an integer that ranges from 0 to 10000000. The default value is 1024000.

Views

Attack defense policy view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
cpu-defend	write

Usage Guidelines

Usage Scenario

To prevent downlink congestion caused by heavy traffic and affect queue scheduling on CPU ports, you can configure rate limit for trunk packets and dumb terminal packets to limit the rate of packets. This prevents other protocol packets from being sent to the CPU due to CPU scheduling blocking.

Precautions

In VS mode, this command is supported only by the admin VS.

Example

# Set the CIR to 20000 kbit/s and CBS to 6400000 bytes for trunk packets and inter-board packets on a dumb terminal.

<HUAWEI> system-view
[~HUAWEI] cpu-defend policy 1
[*HUAWEI-cpu-defend-policy-1] car cross-board cir 20000 cbs 6400000