Unable to access NetScaler SDX SVM (Management Service VM).

Complete the following steps to resolve this issue:

1. Log on to the XenServer using the root credentials.

2. Run the following command to get the UUID of the host machine:
   xe vm-list
   
   Output of the command will look like below:
   
   [root@netscaler-sdx ~]# xe vm-list
   uuid ( RO)           : b19e82df-b157-4f7f-81d8-6a583987e208
        name-label ( RW): Control domain on host: netscaler-sdx
       power-state ( RO): running
   
   
   uuid ( RO)           : e3b3d9d5-ef2b-6d4d-0312-c45f9eb71e43
        name-label ( RW): Management Service VM
       power-state ( RO): running
    

3. Reboot the SVM using the following command:
   xe vm-reboot uuid=<uuid of the Management Service VM> 

4. If you are unable to access the SVM (Management Service) for NetScaler SDX through HTTP Graphical User Interface then, reboot the NetScaler SVM using the reboot command from within the SVM Command Line Interface. This is issuing the reboot command directly and not the /etc/rc.d/svmd reboot.
   Note: This does not bring down the NetScaler VPX instances.