This is our application Setup
1) SSL Enabled BIG IP load balancer
2) SSL enabled OAM SSO
3) 2 OHS servers (Non SSL)
4) single cluster 8 managed server (Non SSL)
When I access the application through the BIGIP URL and login, the appllication page(post login) shows "This page has insecure content." .
Do I need to do any specific configuration in Weblogic and OHS?
are you using some customized application or some product like oracle portal etc ? make sure your bigip certificate is valid and not expired.