[Samba] KRB KDC problem

[Trimble, Ronald D]

Can someone help me figure out what is going on here?  For quite some time now, our implementation of Samba has been humming along without problems.  Now all of a sudden I am unable to get valid sequence numbers for one of our domains.  Here are the details...

>From /var/log/samba/log.wb-EU

[2008/02/06 10:41:41, 1] libsmb/clikrb5.c:ads_krb5_mk_req(602)
  ads_krb5_mk_req: krb5_get_credentials failed for usea-eudc2$@EU.UIS.UNISYS.COM (Cannot contact any KDC for requested realm)
[2008/02/06 10:41:41, 1] libsmb/clikrb5.c:ads_krb5_mk_req(602)
  ads_krb5_mk_req: krb5_get_credentials failed for usea-eudc2$@EU.UIS.UNISYS.COM (Cannot contact any KDC for requested realm)
[2008/02/06 10:41:41, 1] nsswitch/winbindd_ads.c:ads_cached_connection(128)
  ads_connect for domain EU failed: Cannot contact any KDC for requested realm
[2008/02/06 10:41:41, 10] nsswitch/winbindd_cache.c:refresh_sequence_number(494)
  refresh_sequence_number: failed with NT_STATUS_UNSUCCESSFUL
[2008/02/06 10:41:41, 10] nsswitch/winbindd_cache.c:store_cache_seqnum(438)
  store_cache_seqnum: success [EU][4294967295 @ 1202312501]
[2008/02/06 10:41:41, 10] nsswitch/winbindd_cache.c:refresh_sequence_number(506)
  refresh_sequence_number: EU seq number is now -1
[2008/02/06 10:41:41, 10] nsswitch/winbindd_cache.c:cache_store_response(2268)
  Storing response for pid 29455, len 3240


>From /etc/hosts

192.61.58.35    USEA-EUDC2      USEA-EUDC2.eu.uis.unisys.com


>From /etc/krb5.conf

[libdefaults]
        default_tgs_enctypes = DES-CBC-CRC DES-CBC-MD5 RC4-HMAC
        default_tkt_enctypes = DES-CBC-CRC DES-CBC-MD5 RC4-HMAC
        preferred_enctypes = DES-CBC-CRC DES-CBC-MD5 RC4-HMAC
        default_realm = NA.UIS.UNISYS.COM
        dns_lookup_kdc = true

[realms]
        NA.UIS.UNISYS.COM = {
        kdc = 192.63.225.68:88
        admin_server = 192.63.225.68:749
        }

        EU.UIS.UNISYS.COM = {
        kdc = 192.61.58.35:88
        admin_server =192.61.58.35:749
        }

        AP.UIS.UNISYS.COM = {
        kdc = 192.61.58.61:88
        admin_server = 192.61.58.61:749
        }

        LAC.UIS.UNISYS.COM = {
        kdc = 192.61.146.131:88
        admin_server = 192.61.146.131:749
        }

[domain_realm]
        .na.uis.unisys.com = NA.UIS.UNISYS.COM
        na.uis.unisys.com = NA.UIS.UNISYS.COM
        .eu.uis.unisys.com = EU.UIS.UNISYS.COM
        eu.uis.unisys.com = EU.UIS.UNISYS.COM
        .ap.uis.unisys.com = AP.UIS.UNISYS.COM
        ap.uis.unisys.com = AP.UIS.UNISYS.COM
        .lac.uis.unisys.com = LAC.UIS.UNISYS.COM
        lac.uis.unisys.com = LAC.UIS.UNISYS.COM


Here is a sample of running the sequence wbinfo command...

LINUX-1:/etc/samba # wbinfo --sequence
LAC : 2115985
EU : DISCONNECTED
AP : DISCONNECTED
UIS : 74810628
BUILTIN : 1202313222
USTR-LINUX-1 : 1202313222
NA : 271239463


Any help would be much appreciated.  Thanks!