ldap authentication for redhat

[Fırat Varlı <Firat.Varli@isbank.com.tr>]

 Hi,
 I am trying to make my redhat authenticate from openldap. I created user on
openldap and I successfully logon to my box.
 Also I can logon with root and local users. But when I stop openldap I can
logon neither with the user on openldap nor root or local user.
 I should at least logon with root if openldap goes down.
 My nsswitch.conf and system-auth files are as below, thanks for any idea.
system-auth
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
auth        required      /lib/security/$ISA/pam_env.so
auth        sufficient    /lib/security/$ISA/pam_unix.so likeauth nullok
auth        sufficient    /lib/security/$ISA/pam_ldap.so use_first_pass
auth        required      /lib/security/$ISA/pam_deny.so

account     required      /lib/security/$ISA/pam_unix.so
account     [default=bad success=ok user_unknown=ignore service_err=ignore
system_err=ignore] /lib/security/$ISA/pam_ldap.so

password    required      /lib/security/$ISA/pam_cracklib.so retry=3 type=
password    sufficient    /lib/security/$ISA/pam_unix.so nullok use_authtok
md5 shadow
password    sufficient    /lib/security/$ISA/pam_ldap.so use_authtok
password    required      /lib/security/$ISA/pam_deny.so

session     required      /lib/security/$ISA/pam_limits.so
session     required      /lib/security/$ISA/pam_unix.so
session     optional      /lib/security/$ISA/pam_ldap.so
###############################################
nsswitch.conf
passwd:     files ldap
shadow:     files ldap
group:      files ldap

hosts:      files dns

bootparams: nisplus [NOTFOUND=return] files
ethers:     files
netmasks:   files
networks:   files
protocols:  files ldap
rpc:        files
services:   files ldap

netgroup:   files ldap
publickey:  nisplus
automount:  files ldap
aliases:    files nisplus