The monitors which are implemented using scripts to know the status of the service do not go through the SNIP address.
Instead they always go through Netscaler management ip.
All the other monitors for.e.g TCP and HTTP continue to be using SNIP address.
Even if you configure a Net Profile, it does not work.

 

This is by design as scriptable monitors use Freebsd to send traffic and sourced from NSIP.
There is now a way to configure the ADC to source scriptable monitor traffic from a SNIP address.  You can find this information here.
 

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Problem Cause

The OS only sees the physical interface of Netscaler which is the management interface. All the other SNIP or MIP IP's are virtual to the Netscaler and the OS does not recognize it.
 

Some of the perl script monitors are LDAP and SMTP.