Losing network connection, winsock maybe??

June 28, 2012 at 11:18:51
Specs: Windows server 2003 x64, 3.0ghz xeon 16gb
ok, ill get as detailed as i can with this.

We are running Sharepoint 2007(sp3 and wss sp3) on a dell pe2950 running Server 2003 std x64 sp2, 4 146gb 15k sas raid 10, 16gb ram, dual xeon 516 3ghz. the network card is a quad port intel 1gb pci-x server nic. Was running broadcom net xtreme dual port onboard, and had the same issue.

alright, on to the issue at hand.

We are losing partial network connection, after about 14-15 hours of the machine working correctly. What happens is that it cannot ping, or access, any machines not on the same network segment(this machine is on 192.168.3.* and cannot access machines, or be accessed from 192.168.2.*, 192.168.4.*, etc, etc). what i have found is that when i try to ping 192.168.2.210(our dns, dhcp server). its times out about 20 times and replies 2-3 times, and then repeats the cycle all over again. i have done a winsock reset on the machine, and sometimes it starts back up and works again, sometimes it doesn't.

any ideas so far??

i realize that i am leaving some stuff out, but ill be here to answer any questions, if there is something else pertinent to coming up with a solution

Thanks in advance
Rodney


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#1
June 28, 2012 at 11:48:41
winsock is all or nothing. Its not inbetween.

sounds more like a defective router between these ip segments.

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#2
June 28, 2012 at 12:05:23
i would have thought the same, but everything else plugged into the same hardware is working. we changed the NIC, changed the cat5e cable, changed the port, and even moved it to a different switch all together. Weird huh? also, being that my server is on the same segment, i can rdp into it all day long, and anyone else on the same segment can access it as well. But, different segments cannot get to it.

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#3
June 28, 2012 at 12:43:08
different segments cannot get to it.

that certainly is not workstation dependent.
what are you using to route between these segments?

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#4
June 28, 2012 at 13:22:18
we are routing between them using an hp 3400cl switch utilizing vlans. where this machine is located, there are about 20 other machine working fine, and we have switched out nics, switches, cables, and even changed ports. weird huh? i was originally looking at that as being the issue, but im assuming that its not after i changed everything.

its completely random. the machine cannot ping, or be pinged by machines on other segments. when running a continuous ping, then it will reply for 3-4 times, then time out for 15-20 times, then reply once again 3-4 times. What i noticed when i make a change to the network card properties(client for microsoft networks, nlb, fiel and printer sharing, tcp/ip) if i check or uncheck any of these, it starts working for about 4-5 seconds, then drops again.


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#5
June 28, 2012 at 13:55:23
So its only this one workstation that is the issue?

lets see a ipconfig /all from it and one from a machine in the same segment for review.

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#6
June 28, 2012 at 14:43:54
I am out of the office for the remainder of the day. I will post tomorrow for you.

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#7
June 29, 2012 at 05:45:19
Ill get the imaged posted in the next post, but i wanted to notify you of an issue i noticed this morning. When i came in this morning, of course there was only access via the same segment. so i rebooted the server. After reboot, it will only access same segment for about 15 minutes, then it will communicate with all segments.this is something i have noticed before as well.

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#10
June 29, 2012 at 07:58:12
From the timeouts it does not appear routing is working well. I suspect equipment hardware malfunction if this has been working for years. You should be able to see some kind of errors in the switches logs. Is the switch under maintenance?


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#11
July 2, 2012 at 13:01:01
still having the random issue with it losing part of the network connection. have tried everything...

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