samba - Jun 2003 - PDC disconnected until restart (NT_STATUS_NO_LOGON_SERVER - or so)

Hi,

We experience an every-now-and-then problem with our samba PDC. For a couple of
days or so, the PDC runs just fine. Then, one after another, the workstations
(Win9x, NT4/SP6a, Win2000/SP3) complain about the PDC not being there and refuse
to logon users (naturally). The only workstation that's still able to see
and connect to the PDC is the one that's on the same broadcast domain. An
smbclient -L CLIENT -U username then yields an NT_STATUS_NO_LOGON_SERVER (or so)
error. A simple /etc/init.d/samba/restart gets every workstation back on the
domain until the next time.
Our setup is as follows: About 15 workstations are on five different subnets.
Four of them connect via an ISDN router to the fifth. This 'backbone'
has a bandwidth of 64K for each subnet and has a rather high latency (takes
about 7 sec until smbclient is done). The samba PDC (2.2.3a) runs under Debian
stable, it gets updated on a regular basis via apt-get update/upgrade. A second
samba server (formerly the PDC) does it's job as a file server. The PDC does
logon-scripts, policies, shares and domain authentication, no printing, no
profiles.
In case anybody is interested, I'll attach the smb.conf and a log.nmbd that
covers a perion in which at least one workstation (UNION) already lost the
domain connectivity.

Any input would be very much appreciated. Thanks in advance
	Olaf
-------------- next part --------------
# Samba config file created using SWAT
# from developer.rrrrrrrrration.de (192.168.1.2)
# Date: 2003/03/24 00:13:56

# Global parameters
[global]
	workgroup = RRRRRRRATION
	netbios name = RRRRROLIS
	server string = %h server (Samba %v)
	encrypt passwords = true
	obey pam restrictions = Yes
#	password server = RRRRROLIS
	passwd program = /usr/bin/passwd %u
	passwd chat = *Enter\snew\sUNIX\spassword:* %n\n *Retype\snew\sUNIX\spassword:*
%n\n .
	log level = 3
	syslog = 0
	log file = /var/log/samba/log.%m
	max log size = 1000
	name resolve order = wins bcast
	domain admin group = ogrewe root @domadmin
	add user script = /usr/sbin/adduser --force-badname --firstuid 10000 -gid 500
--disabled-login --no-create-home --home /dev/null --shell /bin/false --quiet
--gecos NT-Workstation %u
	logon drive = M:
#	logon path = \\%L\Profiles\%U.pds
	logon path 	logon home 	domain logons = Yes
	os level = 65
	preferred master = True
	domain master = True
	dns proxy = No
	wins support = Yes
	remote announce = 192.168.2.255 192.168.3.255 192.168.4.255 192.168.5.255
	invalid users = 
	logon script = logon.bat 

[homes]
	comment = Home Directories
	create mask = 0700
	directory mask = 0700
	browseable = No
	read only = No

[Allgemein]
	comment = Allgemeines Verzeichnis
	path = /samba/Allgemein
	read only = No
	create mask = 0770
	directory mask = 0770

[printers]
	comment = All Printers
	path = /tmp
	create mask = 0700
	printable = Yes
	browseable = No

[Profiles]
	comment = User Profiles
	path = /samba/profiles
	read only = No
	create mask = 0600
	browseable = Yes

[netlogon]
	comment = The domain logon service
	path = /samba/netlogon
	browseable = No

[CD-ROM]
	comment = CD-ROM-Laufwerk
	path = /var/autofs/misc/cd