Troubleshooting the ACX7332 Router
Alarm Types and Severity Classes on ACX7332 Routers
Before monitoring the alarms on the router, become familiar with the terms defined in Table 1.
|
Term |
Definition |
|---|---|
|
Alarm |
Signal that alerts you to conditions that might prevent normal operation. On a router, the alarm signal is the ALM LED that is lit on the front of the chassis. |
|
Alarm condition |
Failure event that triggers an alarm. |
|
Alarm severity |
Seriousness of the alarm. The level of severity can be either major (steady red) or minor (steady amber). |
|
Chassis alarm |
Predefined alarm that is triggered by a physical condition on the router, such as a power failure, excessive component temperature, or media failure. |
|
System alarm |
Predefined alarm that is triggered by a missing rescue configuration or failure to install a license for a licensed software feature. |
Alarm Types
The router supports these alarms:
-
Chassis alarms indicate a failure on the router or one of its components. Chassis alarms are preset and cannot be modified.
-
System alarms indicate a missing rescue configuration. System alarms are preset and cannot be modified, although you can configure them to appear automatically in the J-Web interface display or CLI display.
Alarm Severity Classes
Alarms on ACX7332 routers have two severity classes:
-
Major (steady red)—Indicates a critical situation on the router that has resulted from one of the following conditions. A major alarm condition requires immediate action.
-
One or more hardware components have failed.
-
If any fan has failed.
-
If any power supply module (PSM) is not connected or if a PSM has failed.
-
One or more hardware components have exceeded temperature thresholds.
-
An alarm condition that is configured on an interface has triggered a critical warning.
-
-
Minor (steady amber)—Indicates a noncritical condition on the router that, if left unchecked, might cause an interruption in service or degradation in performance. A minor alarm condition requires monitoring or maintenance.
A missing rescue configuration generates a minor system alarm.
Troubleshooting 100 Gbps Interface Bring-up Failure
Problem
The 100 Gbps links on an ACX7332 devices fail to come up, indicating a
connectivity issue. This issue is confirmed in the show interfaces
<interface-name> media command output, which shows the
physical link as down, and the show interfaces diagnostics optics
<interface-name> command output, which reports a Tx
loss of signal functionality alarm.
Here's the sample output of the show interfaces <interface-name>
media command:
user@device> show interfaces et-0/0/27 media
Physical interface: et-0/0/27, Enabled, Physical link is Down
Interface index: 1264, SNMP ifIndex: 569
Description: to.se26:1/1/c6/1_L3_lag
Link-level type: Ethernet, MTU: 9216, LAN-PHY mode, Speed: 100Gbps, BPDU Error: None, Loop Detect PDU Error: None, Ethernet-Switching Error: None,
MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Disabled, Media type: Fiber
Device flags : Present Running Transceiver-Tx-Alarm
Interface flags: Hardware-Down SNMP-Traps Internal: 0x100000
CoS queues : 8 supported, 8 maximum usable queues
Current address: 3c:08:cd:8b:5f:19, Hardware address: 3c:08:cd:8b:5e:20
Last flapped : 2025-06-17 20:06:16 UTC (22:18:01 ago)
Input rate : 0 bps (0 pps)
Output rate : 0 bps (0 pps)
Active alarms : LINK
Active defects : LINK, LOCAL-FAULT
Ethernet FEC Mode : NONE
FEC Codeword size 0
FEC Codeword rate 0.000
Ethernet FEC statistics Errors
FEC Corrected Errors 0
FEC Uncorrected Errors 0
FEC Corrected Errors Rate 0
FEC Uncorrected Errors Rate 0
MAC statistics:
Input bytes: 24, Input packets: 0, Output bytes: 11013984, Output packets: 43968
Filter statistics:
Filtered packets: 0, Padded packets: 0, Output packet errors: 0
Interface transmit statistics: Disabled
Link Degrade :
Link Monitoring : DisableThe following is the sample output of the show interfaces diagnostics
optics <interface-name> command:
user@device> show interfaces diagnostics optics et-0/0/27
Physical interface: et-0/0/27
Module temperature : 27 degrees C / 80 degrees F
Module voltage : 3.29 V
Module max power : 4 W
Module temperature high alarm : Off
Module temperature low alarm : Off
Module temperature high warning : Off
Module temperature low warning : Off
Module voltage high alarm : Off
Module voltage low alarm : Off
Module voltage high warning : Off
Module voltage low warning : Off
Module temperature high alarm threshold : 76 degrees C / 168 degrees F
Module temperature low alarm threshold : -6 degrees C / 21 degrees F
Module temperature high warning threshold : 73 degrees C / 163 degrees F
Module temperature low warning threshold : -3 degrees C / 26 degrees F
Module voltage high alarm threshold : 3.7 V
Module voltage low alarm threshold : 3 V
Module voltage high warning threshold : 3.599 V
Module voltage low warning threshold : 3.049 V
Laser bias current high alarm threshold : 130 mA
Laser bias current low alarm threshold : 5 mA
Laser bias current high warning threshold : 125 mA
Laser bias current low warning threshold : 10 mA
Laser output power high alarm threshold : 5.011 mW / 7.00 dBm
Laser output power low alarm threshold : 0.229 mW / -6.39 dBm
Laser output power high warning threshold : 2.511 mW / 4.00 dBm
Laser output power low warning threshold : 0.575 mW / -2.40 dBm
Laser rx power high alarm threshold : 4.466 mW / 6.49 dBm
Laser rx power low alarm threshold : 0.114 mW / -9.40 dBm
Laser rx power high warning threshold : 3.548 mW / 5.49 dBm
Laser rx power low warning threshold : 0.162 mW / -7.90 dBm
Laser temperature high alarm threshold : 76 degrees C / 168 degrees F
Laser temperature low alarm threshold : -6 degrees C / 21 degrees F
Laser temperature high warning threshold : 73 degrees C / 163 degrees F
Laser temperature low warning threshold : -3 degrees C / 26 degrees F
Lane 0
Laser bias current : 0 mA
Laser output power : 0 mW / -Inf dBm
Laser temperature : 27 degrees C / 80 degrees F
Laser receiver power : 1.334 mW / 1.25 dBm
Laser bias current high alarm : Off
Laser bias current low alarm : Off
Laser bias current high warning : Off
Laser bias current low warning : Off
Laser temperature high alarm : Off
Laser temperature low alarm : Off
Laser temperature high warning : Off
Laser temperature low warning : Off
Laser receiver power high alarm : Off
Laser receiver power low alarm : Off
Laser receiver power high warning : Off
Laser receiver power low warning : Off
Laser output power high alarm : Off
Laser output power low alarm : Off
Laser output power high warning : Off
Laser output power low warning : Off
Tx loss of signal functionality alarm : On
Rx loss of signal alarm : Off
Tx laser disabled alarm : OffSolution
As a temporary workaround, you can issue the following command to bring the interfaces up:
user@device> request system application app evo-pfemand restart node
re0
This issue is resolved with a PHY firmware upgrade included in the latest recommended Junos OS Evolved release. The firmware upgrade is available starting Junos OS Evolved release 23.2R2-S5.