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Alarm Overview

Alarms warn you about conditions that can prevent the device from operating normally.

When an alarm condition triggers an alarm, the device lights the yellow (amber) ALARM LED on the front panel. When the condition is corrected, the light turns off.

Note: The ALARM LED on J Series devices light yellow whether the alarm condition is major (red) or minor (yellow).

This section contains the following topics:

Alarm Types

The device supports three types of alarms:

Alarm Severity

Alarms have two severity levels:

Alarm Conditions

To enable alarms on a device interface, you must select an alarm condition and an alarm severity. In contrast, alarm conditions and severity are preconfigured for chassis alarms and system alarms.

Note: For information about chassis alarms for your device, see the Hardware Guide for your device.

This section contains the following topics:

Interface Alarm Conditions

Table 178 lists the interface conditions, sorted by interface type, that you can configure for an alarm. Each alarm condition can be configured to trigger either a major (red) alarm or minor a (yellow) alarm. The corresponding configuration option is included.

For the services stateful firewall filters (NAT, IDP, and IPsec), which operate on an internal adaptive services module within a device, you can configure alarm conditions on the integrated services and services interfaces.

Table 178: Interface Alarm Conditions

Interface

Alarm Condition

Description

Configuration Option

DS1 (T1)

Alarm indication signal (AIS)

The normal T1 traffic signal contained a defect condition and has been replaced by the AIS. A transmission interruption occurred at the remote endpoint or upstream of the remote endpoint. This all-ones signal is transmitted to prevent consequential downstream failures or alarms.

ais

Yellow alarm

The remote endpoint is in yellow alarm failure. This condition is also known as a far-end alarm failure.

ylw

Ethernet

Link is down

The physical link is unavailable.

link-down

Integrated services

Hardware or software failure

On the adaptive services module, either the hardware associated with the module or the software that drives the module has failed.

failure

Serial

Clear-to-send (CTS) signal absent

The remote endpoint of the serial link is not transmitting a CTS signal. The CTS signal must be present before data can be transmitted across a serial link.

cts-absent

Data carrier detect (DCD) signal absent

The remote endpoint of the serial link is not transmitting a DCD signal. Because the DCD signal transmits the state of the device, no signal probably indicates that the remote endpoint of the serial link is unavailable.

dcd-absent

Data set ready (DSR) signal absent

The remote endpoint of the serial link is not transmitting a DSR signal. The DSR signal indicates that the remote endpoint is ready to receive and transmit data across the serial link.

dsr-absent

Loss of receive clock

The clock signal from the remote endpoint is not present. Serial connections require clock signals to be transmitted from one endpoint and received by the other endpoint of the link.

loss-of-rx-clock

Loss of transmit clock

The local clock signal is not present. Serial connections require clock signals to be transmitted from one endpoint and received by the other endpoint of the link.

loss-of-tx-clock

Services

Services module hardware down

A hardware problem has occurred on the device's services module. This error typically means that one or more of the CPUs on the module has failed.

hw-down

Services link down

The link between the device and its services module is unavailable.

linkdown

Services module held in reset

The device's services module is stuck in reset mode. If the services module fails to start up five or more times in a row, the services module is held in reset mode. Startup fails when the amount of time from CPU release to CPU halt is less than 300 seconds.

pic-hold-reset

Services module reset

The device's services module is resetting. The module resets after it crashes or is reset from the CLI, or when it takes longer than 60 seconds to start up.

pic-reset

Services module software down

A software problem has occurred on the device's services module.

sw-down

E3

Alarm indication signal (AIS)

The normal E3 traffic signal contained a defect condition and has been replaced by the AIS. A transmission interruption occurred at the remote endpoint or upstream of the remote endpoint. This all-ones signal is transmitted to prevent consequential downstream failures or alarms.

ais

Loss of signal (LOS)

No remote E3 signal is being received at the E3 interface.

los

Out of frame (OOF)

An OOF condition has existed for 10 seconds. This alarm applies only to E3 interfaces configured in frame mode. The OOF failure is cleared when no OOF or LOS defects have occurred for 20 seconds.

oof

Remote defect indication

An AIS, LOS, or OOF condition exists. This alarm applies only to E3 interfaces configured in frame mode.

rdi

T3 (DS3)

Alarm indication signal

The normal T3 traffic signal contained a defect condition and has been replaced by the AIS. A transmission interruption occurred at the remote endpoint or upstream of the remote endpoint. This all-ones signal is transmitted to prevent consequential downstream failures or alarms.

ais

Excessive number of zeros

The bit stream received from the upstream host has more consecutive zeros than are allowed in a T3 frame.

exz

Far-end receive failure (FERF)

The remote endpoint of the connection has failed. A FERF differs from a yellow alarm, because the failure can be any failure, not just an OOF or LOS failure.

ferf

Idle alarm

The Idle signal is being received from the remote endpoint.

idle

Line code violation

Either the line encoding along the T3 link is corrupted or a mismatch between the encoding at the local and remote endpoints of a T3 connection occurred.

lcv

Loss of frame (LOF)

An OOF or loss-of-signal LOS condition has existed for 10 seconds. The LOF failure is cleared when no OOF or LOS defects have occurred for 20 seconds. A LOF failure is also called a red failure.

lof

Loss of signal

No remote T3 signal is being received at the T3 interface.

los

Phase-locked loop out of lock

The clocking signals for the local and remote endpoints no longer operate in lock-step.

pll

Yellow alarm

The remote endpoint is in yellow alarm failure. This condition is also known as a far-end alarm failure.

ylw

System Alarm Conditions and Corrective Actions

Table 179 lists the two preset system alarms, the condition that triggers each alarm, and the action you take to correct the condition.

Table 179: System Alarm Conditions and Corrective Actions

Alarm Type

Alarm Condition

Corrective Action

Configuration

The rescue configuration is not set.

Set the rescue configuration. For instructions, see the JUNOS CLI User Guide.

License

You have configured at least one software feature that requires a feature license, but no valid license for the feature is currently installed.

Note: This alarm indicates that you are in violation of the software license agreement. You must install a valid license key to be in compliance with all agreements.

Install a valid license key. For instructions, see the JUNOS Software Administration Guide.


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