When LDAP anonymous bind (no username and password defined) is used on K1000, it does not work on K2000.
Workaround
use LDAP username and password
Notes
This feature is marked in JIRA as one that is not going to get a fix. Though K1C-2071 is marked as resolved in K1000 6.4 and this may have an effect on K2000 when devices are used and linked together.