This article describes an issue wherein the EX3400 Series device's port LED continues to be on even after completely halting the device, and indicates that the solution is to upgrade to Junos OS 18.1R3-S8 release.

Note: The reproduction rate of the issue is 30% of the time.

After executing the request system halt at now command on EX3400 devices, the port LED continues to remain on.

Initial State

The link is connected to other EX3400 switches and these ports are up.

root> show interfaces terse | match "up    up" | match ge-

ge-0/0/0                up    up
ge-0/0/0.0              up    up   eth-switch
ge-0/0/1                up    up
ge-0/0/1.0              up    up   eth-switch
ge-0/0/2                up    up
ge-0/0/2.0              up    up   eth-switch
ge-0/0/3                up    up
ge-0/0/3.0              up    up   eth-switch
ge-0/0/4                up    up
ge-0/0/4.0              up    up   eth-switch
ge-0/0/5                up    up
ge-0/0/5.0              up    up   eth-switch
ge-0/0/6                up    up
ge-0/0/6.0              up    up   eth-switch
ge-0/0/7                up    up
ge-0/0/7.0              up    up   eth-switch
ge-0/0/8                up    up
ge-0/0/8.0              up    up   eth-switch
ge-0/0/9                up    up
ge-0/0/9.0              up    up   eth-switch
ge-0/0/10               up    up
ge-0/0/10.0             up    up   eth-switch
ge-0/0/11               up    up
ge-0/0/11.0             up    up   eth-switch
ge-0/0/12               up    up
ge-0/0/12.0             up    up   eth-switch
ge-0/0/13               up    up
ge-0/0/13.0             up    up   eth-switch
ge-0/0/14               up    up
ge-0/0/14.0             up    up   eth-switch
ge-0/0/15               up    up
ge-0/0/15.0             up    up   eth-switch
ge-0/0/16               up    up
ge-0/0/16.0             up    up   eth-switch
ge-0/0/17               up    up
ge-0/0/17.0             up    up   eth-switch
 
{master:0}
root>
root> show chassis hardware
Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                NX0219160762      EX3400-48T
Pseudo CB 0
Routing Engine 0          BUILTIN      BUILTIN           RE-EX3400-48T
FPC 0            REV 24   650-059881   NX0219160762      EX3400-48T
  CPU                     BUILTIN      BUILTIN           FPC CPU
  PIC 0          REV 24   BUILTIN      BUILTIN           48x10/100/1000 Base-T
  PIC 1          REV 24   650-059881   NX0219160762      2x40G QSFP
  PIC 2          REV 24   650-059881   NX0219160762      4x10G SFP/SFP+
Power Supply 0   REV 05   640-060603   1EDV91005CA       JPSU-150W-AC-AFO
Fan Tray 0                                               Fan Module, Airflow Out (AFO)
Fan Tray 1                                               Fan Module, Airflow Out (AFO)
 
{master:0}
root>

Test

1. Step-1. Execute request system halt at now .

root> request system halt at now
warning: This command will halt all the members.
If planning to halt only one member use the member option
Halt the system at now? [yes,no] (no) yes
 
                Stopping cron.
.
Waiting (max 60 seconds) for system process `vnlru' to stop... done
Waiting (max 60 seconds) for system process `bufdaemon' to stop... done
Waiting (max 60 seconds) for system process `syncer' to stop...
Syncing disks, vnodes remaining... 0 0 0 done
All buffers synced.
Uptime: 7m11s
Khelp module "jsocket" can't unload until its refcount drops from 3 to 0.
 
The operating system has halted.
Please press any key to reboot.

2. Step-2. Check the Link LED. With the above condition, the uplink LED is always on.

Note: The peer device can, however, detect the link down normally.

This problem is fixed in Junos OS release 18.1R3-S8.