samba - Jan 2005 - XP SP2 offline files sync delay (again)

I'm running Samba 3.0.7 on Mandrakelinux 9.2 as a PDC, with a few shares 
from the PDC and more on a separate Mandrakelinux 10.0 member file 
server, also running Samba 3.0.7.  The passdb backend is LDAP and 
clients are all Windows XP Professional SP1.  Except for the below, 
everything works great!

We make heavy use of offline files, and with Windows XP SP1, all is 
well.  However, when I install SP2, something breaks with the offline 
files sync operation - there is a ~60 sec. delay and I'm not sure the 
syncs even happen.  Domain logins, mapping drives, browsing, etc. all 
seem OK with SP2.

I am planning to update to Samba 3.0.11 when it is released, and have 
held at 3.0.7 not seeing any fixes since then apparently relevant.

FYI, below are two tcpdump -vv outputs, each syncing a single folder 
from the share \\pdc\software.  The client is 'dblack-pc'.  The dumps 
were taken in exactly the same way, differing only in which SP is 
installed.  I can uninstall XP SP2 and things go back to normal.  The 
Windows firewall is disabled in both cases.

http://jamsoft.com/~dave/samba/sync-sp1.txt
http://jamsoft.com/~dave/samba/sync-sp2.txt

Of note are many MAILSLOT operations on the sp2 dump, but none on the 
sp1 dump.  In both cases I just started the dump on the server, then on 
the client clicked synchronize on the offline folder.  Also, to explain 
- 192.168.10.230 is a floating IP address of 'pdc' and 192.168.10.193 is
the machine's primary address 'aptos'.  I have communications occur
on
the .230 address so it may be migrated between physical machines using 
heartbeat/DRBD, which so far works fine for all other functions.  Hope 
that's not a factor in this problem.

Last, here's my smb.conf file:

http://jamsoft.com/~dave/samba/smb.conf

Any help/advice would be greatly appreciated.  I've scoured the net and 
this list for clues, finding nothing substantive.  This issue is so far 
is a show stopper for me to roll out XP SP2 at work.

Dave

Thought I'd reply to the list with a follow-up:

- If I uninstall my Cisco VPN client software, the delay goes down to 16 
sec.  Perhaps a newer version will work better with SP2.

- My PDC and backup PDC are dual-homed, and the client is (erroneously) 
trying to contact each one of their private interfaces, with 4 second 
timeouts - hence the 16 sec delay above.  I logged this on my firewall.

I'm going to post separately about dealing with a multi-homed situation.

Dave

David Black wrote:
> We make heavy use of offline files, and with Windows XP SP1, all is 
> well.  However, when I install SP2, something breaks with the offline 
> files sync operation - there is a ~60 sec. delay and I'm not sure the 
> syncs even happen.  Domain logins, mapping drives, browsing, etc. all 
> seem OK with SP2.