can you login to OneView? you can go on the administration tab at the Netsight start page, login with your credentials and then see the server log in the "server log" tab.
I am assuming you are not using RADIUS or LDAP authentication for the authentication.
If you cannot login to that, you will need to access it via SSH. the server.log file is located at /usr/local/Extreme_Networks/NetSight/appdata/logs/
you can type:
grep binding server.log
and the last entry should show you what netsight is binding to.