transmission-alarm down (system view)
Function
The transmission-alarm down command customizes alarms for 10GE WAN interfaces globally, that is, specifies alarms that can cause a physical interface to go Down.
The undo transmission-alarm down command cancels the alarms customized for 10GE WAN interfaces globally.
By default, only LRDI, PAIS, PRDI, LAIS, LOF, and LOS alarms are enabled globally on 10GE WAN interfaces, which can cause the physical interface to go Down.
This command is supported only on the NetEngine 8000 F1A.
Format
transmission-alarm down wan { los | lof | lais | oof | lrdi | lcd | auais | b3tca | lom | lop | lrei | pais | prdi | prei | pplm | puneq | rdool | rrool | sdbere | sfbere | trool | b1tca | b2tca } *
undo transmission-alarm down wan [ 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 |
Administrative Unit Alarm Indication Signal. |
- |
| 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. |
- |
Usage Guidelines
Usage Scenario
The frequent generation of alarms causes the physical status of an interface to continuously alternate between Up and Down and continuous network flapping. To customize alarms for 10GE WAN interfaces globally, run the transmission-alarm down command. This configuration specifies alarms that can cause a physical interface to go Down.
Precautions
In VS mode, this command is supported only by the admin VS.
- 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.
- After the transmission-alarm down command is run, a global 10GE WAN interface becomes Down only when the specified alarm is generated, and the previous configuration performed using this command is deleted.
- After the undo transmission-alarm down command is run, a global 10GE WAN interface does not become Down when the specified alarm is generated.
- If the global alarm customization function is configured and the non-default alarm customization configuration exists on an interface, the configuration on the interface takes effect. If the configuration on the interface is the default alarm customization configuration, the global configuration takes effect.
- 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.