Doesn't work with only one network interface
One of the fundamental architectural requirements is that NetScaler requires 3 network interfaces. However when you deploy this AMI it only comes with one. No problem right? just manually add the other two? Wrong. If you try this your NetScaler becomes unresponsive, you can't access the http/https or the SSH or anything else.
Citrix support does not care enough to even look into this issue. It's almost like they never tested this other than powering it on to see if it worked.
If running instance you attach interface then while boot up it came up with 1 interface but on the run it got extra interfaces. So instance is confused and hence it goes this way. This is called interface hotplug. You should never attach interface to a running instance The correct way of doing this is :- 1. Stop the instance 2. Attach interfaces 3. Start interface