Newsgroup: it.comp.reti.ip-admin
Titolo: Dominio non disponibile - 2000 Advanced Server con client NT 4.0

Ho una rete di circa 100 PC  NT 4.0 (sp 6a) e un server di Dominio da poco
aggiornato a Win 2000 Advanced Server - Active Directory.
Se i PC si collegano tutti contemporanemamente ad una risorsa del server
(soprattutto se contemporaneamente fanno il logon) la rete si paralizza e
appare il messaggio
Il dominio X non è disponibile. La rete continua a funzionare perchè il
server rimane raggiungibile dalle risorse di rete.
Ho cercato un pò di informazioni prima di scrivere qui ma non riesco a
comprendere la soluzione.
Molto probabilmente ho dei problemi con il DNS, credo che le risposte del
server siano più lente del dovuto, per cui se i pc sono pochi, piano piano
risponde a tutti se si connettono tutti insieme, si ingrippa.
Ciò è confortato da numerosi messaggi di errore che ho nell'eventviewer: ne
riporto alcuni.
Segnalazioni sul log del DNS
----------------------------------------------------------------------------
--------------------------------------
10/05/2002 0.18.01 DNS Error None 6702 N/A  SRV-AULA01 DNS Server has
updated its own host (A) records.  In order to insure that its DS-integrated
peer DNS servers are able to replicate with this server, an attempt was made
to update them with the new records through dynamic update.  An error was
encountered during this update, the record data is the error code.
If this DNS server does not have any DS-integrated peers, then this error
should be ignored.
If this DNS server's ActiveDirectory replication partners do not have the
correct IP address(es) for this server, they will be unable to replicate
with it.
To insure proper replication:
1) Find this server's ActiveDirectory replication partners that run the DNS
server.
2) Open DnsManager and connect in turn to each of the replication partners.
3) On each server, check the host (A record) registration for THIS server.
4) Delete any A records that do NOT correspond to IP addresses of this
server.
5) If there are no A records for this server, add at least one A record
corresponding to an address on this server, that the replication partner can
contact.  (In other words, if there multiple IP addresses for this DNS
server, add at least one that is on the same network as the ActiveDirectory
DNS server you are updating.)
6) Note, that is not necessary to update EVERY replication partner.  It is
only necessary that the records are fixed up on enough replication partners
so that every server that replicates with this server will receive (through
replication) the new data.
----------------------------------------------------------------------------
------------------
Segnalazioni sul log del Systema
13/05/2002 18.23.37 DhcpServer Error None 1051 N/A SRV-AULA01 The DHCP/BINL
service has determined that it is not authorized to service clients on this
network for the Windows domain: BRG-AULA01.
13/05/2002 16.14.14 Srv Warning None 2021 N/A SRV-AULA01 The server was
unable to allocate a work item 1 times in the last 60 seconds.
13/05/2002 16.12.14 Srv Warning None 2021 N/A SRV-AULA01 The server was
unable to allocate a work item 21 times in the last 60 seconds.
13/05/2002 12.17.20 w32time Warning None 64 N/A SRV-AULA01 "Because of
repeated network problems, the time service has not been able to find a
domain controller to synchronize with for a long time. To reduce network
traffic, the time service will wait 960 minutes before trying again. No
synchronization will take place during this interval, even if network
connectivity is restored. Accumulated time errors may cause certain network
operations to fail. To tell the time service that network connectivity has
been restored and that it should resynchronize, execute ""w32tm /s"" from
the command line. "
13/05/2002 12.17.20 w32time Error None 62 N/A SRV-AULA01 This Machine is a
PDC of the domain at the root of the forest. Configure to sync from External
time source using the net command,  'net time /setsntp:<server name>'.
13/05/2002 12.12.08 Srv Warning None 2021 N/A SRV-AULA01 The server was
unable to allocate a work item 1132 times in the last 60 seconds.
-------------------------------------------------------------------------
Il server ha due schede, una verso la rete interna dei 100 PC con indirizzo
192.168.157.XXX     255.255.255.0
l'altra verso internet con 151.XXX.XXX.XXX  255.255.255.0
Il DNS è configurato con la ricerca verso se stesso e con il forward verso
due server DNS della rete Internet.
Grazie a coloro che vorranno aiutarmi.
Graziano

gia....non è il numero di PC...i pc devono avere come dns il server w2k...
e se prprio hanno la testa dura modifica anche host e lmhost...
usi dhcp?...se si metti il wins su dhcp..