vlan-host-car

Function

The vlan-host-car command sets the CAR for CPU-destined packets that carry the same VLAN ID on the user side.

The undo vlan-host-car command restores the default settings.

By default, the CIR of the CPU-destined packets with VLAN tags of the same VLAN ID on the user side is 5120 kbit/s, the PIR is 5120 kbit/s, the CBS is 2560000 bytes, and the PBS is 2560000 bytes.

This command is supported only on the NetEngine 8000 F1A.

Format

vlan-host-car cir cir-value [ pir pir-value ] [ cbs cbs-value pbs pbs-value ]

undo vlan-host-car

Parameters

Parameter	Description	Value
pir pir-value	Specifies the PIR.	The value is an integer ranging from 0 to 4294967295, in kbit/s.Setting the PBS to be greater than or equal to the CBS.
cbs cbs-value	Specifies the CBS.	The value is an integer ranging from 10000 to 4294967295, in bytes.
pbs pbs-value	Specifies the PBS.	The value is an integer ranging from 0 to 4294967295, in bytes. Setting the PBS to a value smaller than the CBS is recommended so that traffic conforming to the CBS can be sent to the CPU.
cir cir-value	Specifies the CIR.	The value is an integer ranging from 8 to 4294967295, in kbit/s.

Views

Slot view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
cpu-defend	write

Usage Guidelines

Usage Scenario

When any of the following problems occurs, you can set the CAR for CPU-destined packets that carry the same VLAN ID on the user side through this command.

Traffic congestion occurs on a link due to excessive CPU-destined packets that carry the same VLAN ID, which affects the processing efficiency of the CPU.

Certain packets are lost when the CAR is improperly set for CPU-destined packets that carry the same VLAN ID.

Configuration Impact

When this command is configured and multiple packets are sent to the CPU:

If these packets are single-tagged VLAN packets, packets with the same VLAN ID share the VLAN-Host-CAR.

If these packets are double-tagged VLAN packets, packets with the outer and inner VLAN IDs being respectively the same share the VLAN-Host-CAR.

Precautions

If the effective CIR is not the same as the configured CIR, run the display cpu-defend vlan-host-car auto-adjust statistics slot slot-id command to check whether automatic bandwidth adjustment is implemented.

Example

# Set the CIR and PIR to 5000 kbit/s and 7000 bytes respectively for CPU-destined packets that carry the same VLAN ID on the user side in slot 1.

<HUAWEI> system-view
[~HUAWEI] slot 1
[~HUAWEI-slot-1] vlan-host-car cir 5000 pir 7000