Connectrix: MDS: Show Users Command Displays an Incorrect Date and Time Jan 1 08:00 only

Summary: The Show Users Command provides information about users logged into the system. This article explains an issue where the date and time are shown incorrectly.

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Symptoms

The switch is running at NX-OS 9.4.1a.

The users command output displays an incorrect timestamp as shown below: 
[Model 9132T on NX-OS 9.4.1a]                    
===================
 
MDS9132T-s1fA-sw3# show version 
  system:    version 9.4(1a)                         <<<<<<<<<<<<<<<<<<< 9.4.1a
  system image file is:    bootflash:///m9100-s6ek9-mz.9.4.1a.bin
  system compile time:     12/25/2023 12:00:00 [01/12/2024 10:45:51]
  Reason: Reload due to non-disruptive system reload
 
MDS9132T-s1fA-sw3# sh clock
Time source is Hardware Calendar
09:55:11.833 IST Sat Jun 15 2024
 
MDS9132T-s1fA-sw3# show users
NAME     LINE         TIME         IDLE          PID COMMENT
admin    pts/0        Jan  1 05:30   .         16852 session=ssh *      <<<<<<<<<<<< Jan 1 05:30

Cause

This is due to a Cisco Defect ID CSCWK43183 affecting NX-OS 9.4.1a.

Resolution

In NX-OS version 9.4(1a), the output of the show users command consistently displays January 1 along with the time offset from UTC based on the configured time zone.

Since the show users output displays an incorrect timestamp, the show accounting log can be checked for the most recent login timestamp for the admin user.

Workaround: 
When a user logs in to the switch on SSH, accounting log records the login of the user as below:
<timestamp> :type=start:id=10.138.65.80@pts/1:user=admin:cmd=
 
When a user logs into the switch on console, accounting log records the login of the user as below:
<timestamp> :type=start:id=console0:user=admin:cmd=
 
To view the last logged in time for a user named "admin", run the below command:
 # show accounting log | grep "start.*admin" | tail lines 1

Fix:
Upgrade to NX-OS 9.4.2 version. 
DS9132T-s1fA-sw3# show version | grep sys
  system:    version 9.4(2)                     <<<<<<<<<<<<<<<<<<<<< 9.4.2
  system image file is:    bootflash:///m9100-s6ek9-mz.9.4.2.bin
  system compile time:     4/25/2024 12:00:00 [05/10/2024 03:55:39]
 
MDS9132T-s1fA-sw3# sh users
NAME     LINE         TIME         IDLE          PID COMMENT
admin    pts/0        Jun 15 10:16   .          6362 (10.1xx.x5.1x5) session=ssh *   >>>> showing correct timings
 
After downgrading the switch from version 9.4.1a to 9.3.2a, the timestamps displayed by the 'show users' command are now correct.

BIOS compile time:       05/16/2023
  kickstart image file is: bootflash:///m9300-s1ek9-kickstart-mz.9.3.2a.bin   <<<<
  kickstart compile time:  4/25/2023 12:00:00 [05/13/2023 03:09:36]
  system image file is:    bootflash:///m9300-s1ek9-mz.9.3.2a.bin
  system compile time:     4/25/2023 12:00:00 [05/13/2023 04:28:40]
 
MDS9396S-s1fB-SW1# show users
NAME     LINE         TIME         IDLE          PID COMMENT
admin    pts/0        Jun 15 15:41   .          4855 (10.1xx.2xx.x8) session=ssh *  <<<< show users displaying the correct time.
 
MDS9396S-s1fB-SW1# show clock
Time source is NTP
15:42:36.016 ist Sat Jun 15 2024
 
Note:
Before performing an upgrade to 9.4.2, verify if TACACS is used as an authentication protocol in your switches.
  • If yes, Cisco defect CSCWK14579 may cause authentication failures after the upgrade to 9.4.2. Hence, disable TACACS and perform the firmware upgrade. Then enable the TACACS configuration.
  • If switches are not using TACACS for authentication, you can upgrade to 9.4(2) without any issues.

Products

VxBlock and Vblock Systems
Article Properties
Article Number: 000226156
Article Type: Solution
Last Modified: 19 May 2025
Version:  2
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