transmission-alarm down

Function

The transmission-alarm down command customizes the alarms that cause the physical status of interfaces to go Down.

The undo transmission-alarm down command removes the customized alarms. If no parameter is specified for the command, the default configuration is restored after the command is executed.

By default, LRDI, PAIS, PRDI, LAIS, LOF, and LOS alarms can cause the physical status of 10GE WAN interfaces to go Down.

This command is supported only on the NetEngine 8000 F1A.

Format

transmission-alarm down { los | lof | lais | oof | lrdi | lcd | auais | b3tca | lom | lop | lrei | pais | prdi | prei | pplm | puneq | rdool | rrool | sdbere | sfbere | trool | b1tca | b2tca } ^*

Parameters

Parameter	Description	Value
los	Indicates the signal loss alarm. This alarm is caused by a poor link.	-
lof	Indicates the frame loss alarm. This alarm is caused by a poor physical link or low clock precision.	-
lais	Indicates the line alarm.	-
oof	Indicates the frame loss alarm. If consecutive five frames are not received, an OOF alarm will be generated.	-
lrdi	Indicates the line remote defect alarm.	-
lcd	Indicates the alarm of code group synchronization loss.	-
auais	Indicates an administrative unit alarm.	-
b3tca	Indicates the B3 threshold crossing alarm.	-
lom	Indicates the alarm of tributary multiframe loss.	-
lop	Indicates the pointer loss alarm. If consecutive eight frames received by pointer J1 are invalid, the lop alarm will be generated.	-
lrei	Indicates the line remote error alarm.	-
pais	Indicates the path alarm.	-
prdi	Indicates the path remote defect alarm.	-
prei	Indicates the path remote error alarm.	-
pplm	Indicates the path payload mismatch alarm.	-
puneq	Indicates the path unequipped alarm.	-
rdool	Indicates the out-of-lock alarm of received data.	-
rrool	Indicates the out-of-lock alarm of the received reference clock.	-
sdbere	Indicates the signal degrade threshold alarm.	-
sfbere	Indicates the signal failure threshold alarm.	-
trool	Indicates the out-of-lock alarm of the transmitted reference clock.	-
b1tca	Indicates the B1 threshold crossing alarm.	-
b2tca	Indicates the B2 threshold crossing alarm.	-

Views

10G WAN interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
device-mgr	write

Usage Guidelines

Usage Scenario

Frequent generation of alarms will cause the physical status of interfaces to switch between Up and Down. You can use the transmission-alarm down command to customize the alarms that cause the status change. In this manner, IP devices can ignore the alarms that are not customized to suppress network flapping.

Precautions

By default, the LAIS, LOF, and LOS alarms can change the interface status. If these types of alarms are disabled, service data cannot be forwarded correctly.
Because subcards on hardware support different types of alarms, not all interfaces support the preceding alarms. If the alarm type that the hardware does not support is configured, the configuration fails. The system will display a message telling you which alarm types are not supported on this interface.
After the transmission-alarm down command is run, only the alarms specified currently can cause the physical status of interfaces to go Down, and the previous configuration performed by using this command is deleted. After the undo transmission-alarm down command is run, the alarms specified currently do not cause the status of interfaces to go Down.
If no parameter is specified for the undo transmission-alarm down command, the default configuration is restored after the command is executed.
WLNK alarms can be viewed only and cannot be configured by using this command. The WLNK alarms are always enabled and can cause the physical status of interfaces to go Down. You can run the display transmission-alarm command to view the status and statistics on the alarms.

Example

# Configure GE 0/1/0 to physically go Down at the generation of LOS, LOF, and OOF alarms.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[~HUAWEI-GigabitEthernet0/1/0] transmission-alarm down los lof oof