After successfull installation of sp7 (without drivers update) to netware
6.5 server it periodically shows following messages:

12.10.2007 13.39.20 : DS-10553.73-272
Established communication with server .MILADA.MFF

12.10.2007 13.39.25 : DS-10553.73-271
Unable to communicate with server .MILADA.MFF

There are only two servers in the tree, the second is netware 4.11 DS 6.21
and holds the master replica.

Both have ipx bound to 802.2 frame, ipxping on both servers works up to
packet size 1497.
Time on both servers is synchronized to another server.

The "Repair Server's Network Address" option in DSRepair on 6.5 server
gives
020C351D (see attached parts of dsrepair logs) but correct network address
of 4.11 server is 33E1351D.

What can be the solution?
Pavel Kudrna



/************************************************** **************************/
Netware 4.1 Directory Services Repair 4.73 , DS 6.21
Log file for server "MILADA.MFF" in tree "TROJA"
Time synchronization and server status information
Start: Friday, October 12, 2007 1:56:50 pm Local Time

DS.NLM Replica Time Time is
Time
Server name Version Depth Source in sync
+/-
---------------------------+---------+---------+-----------+--------+-------
SHEENI.MFF 10553.73 0 Secondary Yes
0
MILADA.MFF 6.21 0 Secondary Yes
0
*** END ***


/************************************************** **************************/
NetWare 1602.00 Directory Services Repair 10551.26, DS 10553.73

Log file for server ".SHEENI.MFF" in tree "TROJA"

Time synchronization and server status information

Start: Friday, 12 October 2007 14.03.54 Local Time

---------------------------+---------+---------+-----------+--------+-------
DS.NLM Replica Time Time is
Time
Server name Version Depth Source in sync
+/-
---------------------------+---------+---------+-----------+--------+-------

.MILADA.MFF - - - -
-
ERROR: Could not connect to server, Error : -625
.SHEENI.MFF 10553.73 0 Secondary Yes
0
---------------------------+---------+---------+-----------+--------+-------


/************************************************** **************************/
NetWare 1602.00 Directory Services Repair 10551.26, DS 10553.73
Log file for server ".SHEENI.MFF" in tree "TROJA"
Repairing Server Network Addresses
Start: Friday, 12 October 2007 14.15.49 Local Time
************************************************** **************
This operation will search IPX, SLP, and DNS tables, if
available, in order to validate network address attributes of
NCP_SERVERS, as well as the referrals on replica objects.
If the information on DNS/DHCP tables or the /etc/hosts file is
incorrect, then we cannot guarantee proper validation of network
addresses, nor replica referral updates. This is particularly true
if the system uses unregistered DHCP addresses or the information
in the HOSTS file is incorrect or outdated
************************************************** **************

Checking server: .MILADA.MFF
Found a Network Address Property on the server object and through SAP:
Address Type = IPX, data[12] = 020C351D0000000000010451
Found a Network Address Property on the server object and through DNS:
Address Type = TCP, data[6] = 195.113.23.132:524
Checking server address in Replica ID: 1, .[Root].
ERROR: Could not connect. Error : -626

Checking server: .SHEENI.MFF
Found a Network Address Property on the server object and through SLP:
Address Type = IPX, data[12] = 000001110000000000010451
Found a Network Address Property on the server object and through SLP:
Address Type = TCP, data[6] = 195.113.23.135:524
Found a Network Address Property on the server object and through SLP:
Address Type = UDP, data[6] = 195.113.23.135:524
Checking server address in Replica ID: 2, .[Root].
*** END ***