Re: network drops out every afternoon
- From: davis_pc <davispc@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Sat, 15 Jul 2006 12:36:01 -0700
I called the customer, it appears they are still having a connectivity
problem. I know I have the two NICs set up right. Event log is not
complaining. Network and Internet function fine. When they loose a connection
to the server, Internet keeps working OK which tells me the server is still
handling Internet traffic fine. What I believe is happening is the LAN
connection hangs, does not disconnect but there is no response from the
server like it is maybe a authentication problem? They have to "end task" or
reboot to get the server back. They may have a Word doc open, or Excel, or a
Quickbooks company file and at some random time, it just hangs or the program
which has the file open will state it can no longer acces the file. I have
replaced the switch already. To recap - this is a SBS2003 server with two
NICs, everyone is set up on the domain and using Exchange server. All is well
when it works, it just won't reliably stay working. The connection hangs on
ALL workstations (5). It usually quits at random times on each workstation
after about 8 hours of constant use. My next try is to make sure a simple
file transfer/copy occurs in a reasonable amount of time from each
orkstation, I will try copying a 30MB file to/from each workstation but in
the meantime, has anyone got an idea of what to try next? - Dave
"Tony" wrote:
Dave,.
Sorry I've been slow to respond (out of office over 4th long weekend).
Anyway, good luck and let us know if it works.
Tony
"davis_pc" <davispc@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:92E2AD51-EF63-4CEC-8311-1B5DDFE71A67@xxxxxxxxxxxxxxxx
I've switched DHCP service and DNS services back on SBS. Router DHCP is
now
off. I also switched to using both NICs for this config. One for the LAN
and
the other for Internet/router/firewall. I know SBS is happier configured
this
way. I am now waiting to see how the LAN connectivity hangs in there. I
am
90 miles from this customer but have remote access enabled - I will
monitor
and get back to you. Thanks for the suggestions. - Dave
"Tony" wrote:
Dave,
I may have missed it but did you say you have DNS also turned off on the
SBS
server? If so you will probably want to turn it back on and have all
your
client PC's look to SBS for DNS only not the router. I had some similar
setup/issues a while back and here is what I did to fix them.
1) I too had two NIC's with one disabled on SBS server. I enabled the
second one and re-ran CEICW choosing "A direct broadband connection" as
outlined in http://www.12c4pc.com/sbs2k3/sbs2k3-n2.htm (even though I
have
"A router with an IP address"). I then connected the internal LAN NIC
connection to the switch with the client PC's. And the external WAN NIC
to
the ADSL router. Now the PC's will need to go through the SBS server's
firewall to get out to the Internet (another layer of protection).
2) On my client PC's I made sure that they pointed to the SBS server as
the
sole DNS entry.
3) One other thing I did was put the ADSL router onto a different IP
scheme.
Now my DSL router uses the 172.16.0.xxx (the SBS WAN connection has this
IP
address statically assigned) whereas, my internal LAN is on the
192.168.1.xxx address scheme (this also allows the SBS server to use DHCP
as
well as the router which has a built in wireless access point that I use
for
visiting accountants) and this gives me separation from a few people that
can use our wireless access to get out to the Internet and still not have
access to our internal network.
Since moving to this scenario it has worked flawlessly. I would like to
point out the reference in #1 above was very helpful in setting this up.
I
hope this helps you out.
Tony
"davis_pc" <davis_pc@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:8AE554B2-1916-4436-8115-953ED270930C@xxxxxxxxxxxxxxxx
Thanks for your considerartion --Working at a customer who has SBS2003.
Single NIC used on server with local static IP (but two NICs are avail.
one
is disabled) Each workstation accesses Exchange/Outlook via the server
and
Internet via a router. When they loose connection to server, they never
loose
Internet connectivity, but access to the server/Exchange just goes
away.
BUT
You can still ping the server! Only a reboot of each workstation allows
each
workstation access back to the server. I've looked at event logs,
nothing
coincides with the problem. There are references to DNS in event logs
(see
below) but each workstation is DHCP with the router. DHCP and DNS
services
are off/stopped on the server. Server has a local static IP. When the
problem
happens they get errors cosistent with a disconnected server (but
remember
I
can still ping it) Nothing in the security event log. Here are some of
the
event log messages that may or may not have something to do with this:
they
are listed in order of most to least frequent. NONE of these events
coincide
with when the problem occurs - no events coincide! But it consistently
drops
out at random times ,usually in the afternoon after about 6 to 8 hrs.
of
use.
Event ID 5781---Dynamic registration or deregistration of one or more
DNS
records failed because no DNS servers are available.
---I think the above would be normal with DNS service turned off
Event ID 2504---The server could not bind to the transport
\Device\NwlnkIpx.
---who cares if I can't use Netware???
Event ID 38672---No suitable default server credential exists on this
system. This will prevent server applications that expect to make use
of
the
system default credentials from accepting SSL connections. An example
of
such
an application is the directory server. Applications that manage their
own
credentials, such as the internet information server, are not affected
by
this.
--possible cause?
Event ID 40961---The Security System could not establish a secured
connection with the server DNS/prisoner.iana.org. No authentication
protocol
was available.
--Looks like a bad name somewhere is getting thrown into DNS limbo
---LOT OF THESE --all slightly different
Event ID 223---The description for Event ID ( 223 ) in Source ( NTDS
ISAM )
cannot be found. The local computer may not have the necessary registry
information or message DLL files to display messages from a remote
computer.
You may be able to use the /AUXSOURCE= flag to retrieve this
description;
see
Help and Support for details. The following information is part of the
event:
NTDS, 588, NTDSA: , C:\WINDOWS\NTDS\edb0064A.log,
C:\WINDOWS\NTDS\edb0064A.log.
---another example
Event ID 221---The description for Event ID ( 221 ) in Source ( NTDS
ISAM )
cannot be found. The local computer may not have the necessary registry
information or message DLL files to display messages from a remote
computer.
You may be able to use the /AUXSOURCE= flag to retrieve this
description;
see
Help and Support for details. The following information is part of the
event:
NTDS, 588, NTDSA: , C:\WINDOWS\NTDS\ntds.dit.
--another one
Event ID 701---The description for Event ID ( 701 ) in Source ( ESE )
cannot
be found. The local computer may not have the necessary registry
information
or message DLL files to display messages from a remote computer. You
may
be
able to use the /AUXSOURCE= flag to retrieve this description; see Help
and
Support for details. The following information is part of the event:
Information Store, 3668, First Storage Group: , C:\Program
Files\Exchsrvr\mdbdata\priv1.edb.
Let me know if anyone needs any more info - Thanks for any response to
this
issue. Your expertise is appreciated.
Dave Davis
- References:
- Re: network drops out every afternoon
- From: davis_pc
- Re: network drops out every afternoon
- From: Tony
- Re: network drops out every afternoon
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