Thanks Sumit,
There isn't any hostname assignment via dhcp. I checked the sssd.conf file and its
exactly as you recommended. i found another line of error when i checked the log now
[sssd[ldap_child[70480]]]: Failed to initialize credentials using keytab
[MEMORY:/etc/krb5.keytab]: Client 'host/xxx@xxx' not found in Kerberos database.
Unable to create GSSAPI-encrypted LDAP connection.