Hi, following Susan's council...I leave out my purpose about floating ip and I set up two server ldap in client's configuration...int this way everything works, but I have two question: 1) After set up via authconfig in a fedora 5 client ldap configuration I reboot client but on booting seems that something doesn't work...I have to wait a lot of time..after this time X doens't work and I remake Xconfiguration..but, after that I succesfully log in in client and query on ldap servers...I found in logs this: Xfs: nfs_ldap: reconnetting to ldap server (sleeping 4 seconds)... -CUT- Xfs: nfs_ldap: reconnecting to ldap server (sleeping 40 seconds)... And so on...but repeat...after X reconfiguration everything works..the problem is every time I reboot client I have to configure X :-( 2) When for test I shutted nodo1 query and authentication was made correctly from nodo2, but I saw that in this case it was slower than with nodo1...for every query I ave to wait about 3 seconds....while with nodo1 it was istantaneous. Thanks for help Alex