||LDAP in Mac OS X Server|
|Subject:||LDAP Authentication (10.3.4 Server & Client)|
Response to: LDAP Authentication (10.3.4 Server & Client)
i have seen similar issues with auth to a mac osX server running both netinfo and openldap when spanning tree is turned on. i would disable spanning tree on your switches and try the auth again.
the reason it works with the dumb hub is simply that is doesn't support spanning tree