This article is to give information on this Alarm, "netScalerLoginFailure", and how to clear it in the Command Center. 
This Alarm is derived from a VPX Instance configured on a Netscaler SDX. 
The cause of this Alarm was because the "nsroot" Password was changed directly on the Netscaler Instance, instead of creating a new "Admin Profile" in order to change the password.
 

---

Instructions

 
#1.    Go to "Citrix Network",  "Device Inventory", "Devices"
 
 
 
#2.  After you Click "once" to highlight the device which shows a critical Alarm.
 
       Click on "Alarms" at the bottom of the page.
 

 
#3.  Another window will open.
        Locate "netScalerLoginFailure" and click on "Details".
       

 
#4.   From the "Alarm Details" page, you will see:
          Description:   "User:   nsroot"
          Category:       "netScalerLoginFailure"
 
 
 
#5.  To correct this issue.
        Create another "Admin Profile" for the VPX Instance with your "new" password.
        http://support.citrix.com/proddocs/topic/sdx-60/sdx-ag-prov-ns-instances-config-admin-profiles-tsk.html
 

This article is to give you information on this Alarm, "netScalerLoginFailure", and how to clear it in the Command Center.

You can also view the "ns.log" files from the Netscaler to see "nsroot login failures".