I don't have pam configured on my SuSE 10.1 server to use kerberos but I have setup nsswitch.conf for ldap which I've been trying to configure. When I try to login on the console it works. I configured kerberos client in YaST but I don't see how this is working

When I "grep -i krb *" in the pam.d directory it shows no pam_krb5.so but how is it that I'm still able to login with kerberos + ldap...I can even change my passwd for the kerberos accounts.
/etc/pam.d/common-*
::::::::::::::
common-account
::::::::::::::
#
# /etc/pam.d/common-account - authorization settings common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of the authorization modules that define
# the central access policy for use on the system. The default is to
# only deny service to users whose accounts are expired.
#
account required pam_unix2.so
::::::::::::::
common-auth
::::::::::::::
#
# /etc/pam.d/common-auth - authentication settings common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of the authentication modules that define
# the central authentication scheme for use on the system
# (e.g., /etc/shadow, LDAP, Kerberos, etc.). The default is to use the
# traditional Unix authentication mechanisms.
#
auth required pam_env.so
auth required pam_unix2.so
::::::::::::::
common-password
::::::::::::::
#
# /etc/pam.d/common-password - password-related modules common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of modules that define the services to be
# used to change user passwords. The default is pam_unix2 in combination
# with pam_pwcheck.
# The "nullok" option allows users to change an empty password, else
# empty passwords are treated as locked accounts.
#
# To enable Blowfish or MD5 passwords, you should edit
# /etc/default/passwd.
#
# Alternate strength checking for passwords should be configured
# in /etc/security/pam_pwcheck.conf.
#
# pam_make can be used to rebuild NIS maps after password change.
#
password required pam_pwcheck.so nullok
password required pam_unix2.so nullok use_first_pass use_authtok
::::::::::::::
common-session
::::::::::::::
#
# /etc/pam.d/common-session - session-related modules common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of modules that define tasks to be performed
# at the start and end of sessions of *any* kind (both interactive and
# non-interactive). The default is pam_unix2.
#
session required pam_limits.so
session required pam_unix2.so
/etc/nsswitch.conf
#
# /etc/nsswitch.conf
#
# An example Name Service Switch config file. This file should be
# sorted with the most-used services at the beginning.
#
# The entry '[NOTFOUND=return]' means that the search for an
# entry should stop if the search in the previous entry turned
# up nothing. Note that if the search failed due to some other reason
# (like no NIS server responding) then the search continues with the
# next entry.
#
# Legal entries are:
#
# compat Use compatibility setup
# nisplus Use NIS+ (NIS version 3)
# nis Use NIS (NIS version 2), also called YP
# dns Use DNS (Domain Name Service)
# files Use the local files
# [NOTFOUND=return] Stop searching if not found so far
#
# For more information, please read the nsswitch.conf.5 manual page.
#
# passwd: files nis
# shadow: files nis
# group: files nis
passwd: files ldap
shadow: files ldap
group: files ldap
hosts: files dns
networks: files dns
services: files
protocols: files
rpc: files
ethers: files
netmasks: files
netgroup: files
publickey: files
bootparams: files
automount: files
aliases: files