trap-threshold crc-error

Function

The trap-threshold crc-error command sets an upper threshold, lower threshold, and detection interval for the CRC error alarm.

The undo trap-threshold crc-error command restores the upper threshold, lower threshold, and detection interval of the CRC error alarm to the default values..

By default, the upper threshold of the CRC error alarm is 1000, the lower alarm threshold is 100, and the detection interval is 10 seconds.

Format

trap-threshold crc-error threshold interval-second interval [ shutdown ]

trap-threshold crc-error threshold interval-second interval

undo trap-threshold crc-error

Parameters

Parameter	Description	Value
threshold	Specifies an alarm threshold for CRC errors.	The value is an integer ranging from 1 to 65535. The default upper alarm threshold is 1000, and the default lower alarm threshold is 100.
interval-second interval	Specifies a detection interval for CRC error frames.	The value is an integer ranging from 1 to 65535, in seconds. The default value is 10.
shutdown	Shuts down an interface at the physical layer if the number of CRC error frames received by the interface reaches the alarm threshold for three consecutive detection intervals.	By default, an interface is not shut down at the physical layer if the number of CRC error frames received by the interface reaches the alarm threshold for three consecutive detection intervals.
crc-error	This object indicates that an alarm is generated when the number of CRC error packets exceeds the threshold.	-

Views

100GE interface view, 10G LAN interface view, 10G WAN interface view, 25GE interface view, 400GE interface view, 40GE interface view, 50GE interface view, FlexE interface view, GE optical interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
device-mgr	write

Usage Guidelines

Usage Scenario

To set a threshold and detection interval for the CRC error alarm, run the trap-threshold crc-error command. After this configuration is performed, a device generates an alarm and sends it to an NMS only when the number of CRC error frames sent or received by the device reaches the specified threshold for three consecutive detection intervals. The device sends a clear alarm to the NMS only when the number of CRC error frames sent or received by the device falls below the threshold for three consecutive detection intervals.

If an interface receives a large number of CRC error frames, the interface is prone to flapping. Such interface flapping may easily be left unnoticed. To address this issue, specify shutdown in the command so that the interface is shut down at the physical level if the number of CRC error frames received within the specified interval reaches the configured alarm threshold.

Configuration Impact

If shutdown is specified in the command and the interface is deactivated because the number of CRC error frames received within the specified interval reaches the configured alarm threshold, the interface remains Down even if a clear alarm is generated. To prevent services from being affected, activate the interface manually after a clear alarm is generated.

Precautions

The configured threshold takes effect only when the CRC alarm function is enabled.

The following commands cannot coexist. The most recently run command overwrites the previous one.

trap-threshold crc-error
trap-threshold crc-error bit-error-ratio
trap-threshold crc-error high-threshold
trap-threshold crc-error { mac-fcs-exc | mac-fcs-sd }
trap-threshold crc-error percent
trap-threshold crc-error packet-error-ratio

Example

# On GE 0/1/0, set the CRC error alarm threshold to 5 and the detection interval to 10 seconds.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[~HUAWEI-GigabitEthernet0/1/0] trap-threshold crc-error 5 interval-second 10