We are testing an upgraded version of Moodle from 1.9.10 to 2.0.2 on a test server and have preserved the same LDAP settings across the upgrade process. We have an OpenLDAP server which handles authentication for the entire school district and is distributed over several servers.
LDAP authentication works, but there is a substantial (over 60 seconds!) delay for the 2.0.2 install to authenticate. The delay for our production server running Moodle 1.9.10 is never more than 3-4 seconds and since they are using the exact same credentials, I can't see where the problem might lie.
Is anyone else experiencing this type of delay? Any ideas on what could be the issue?