topic Re: Network Problem in Networking

Network Problem

Fabio_56 — Wed, 16 Jun 2004 07:19:22 GMT

We have installed two Proliant ML370 with NC7781 network adapter.
The cable is a C.5 E. and we use hub 3com.
We verified that, some time, the connections between this machine get down.
Each this new servers comunicate always with all firewall zones without problem.

We changed the hub, re-certificate the cable but the problem persist.
help me!, thanks

Re: Network Problem

Ronald Postma — Wed, 16 Jun 2004 10:18:45 GMT

Hi Fabio,
I do not have any idea at the moment, but it does not have to be a hardware problem
Is there anything in the eventlogs?
Are all drivers up to date?
Are all critical OS patches installed?
What is the OS?

HTH,
Ronald

Re: Network Problem

Roger Faucher — Wed, 16 Jun 2004 11:14:36 GMT

Fabio:

Try the newest NIC driver. Go here:

http://h20180.www2.hp.com/apps/Lookup?h_lang=en&h_cc=us&cc=us&h_page=hpcom〈=en&h_client=S-A-R163-1&h_pagetype=software&h_query=ml370&submit.x=5&submit.y=7

then drill down by choosing the appropriate ML370 model, then the appropriate OS, and finally look in Driver - Network.

Also, make sure both ends are set the same (for instance, avoid having one end set to Autodetect and the other end set to 100/half-duplex).

HTH

Make a great day!

Roger

Re: Network Problem

Fabio_56 — Thu, 17 Jun 2004 02:41:08 GMT

There is nothing in the event wiever
All drives ar update from the hp site
The OS is Windows 2000 server Sp4
All the critical OS patches are installed

Yesteday I substituted the 3Com hub with a cisco switch.

Re: Network Problem

Antoniov. — Thu, 17 Jun 2004 03:11:57 GMT

Fabio,
what network protocol are you using? If you are using NDIS or NetBeui or NetBios you can meet this problem.
If you are using TCP/IP check if there are 2 host with same IP address.

Ciao
Antonio Vigliotti

Re: Network Problem

Fabio_56 — Thu, 17 Jun 2004 03:29:41 GMT

Antonio

I use TCP/Ip protocol, and a'm sure that there are not duplicate ip adderess.
In the dmz zone there are only these two server.
thanks

Re: Network Problem

Simon Purdue — Thu, 17 Jun 2004 05:05:00 GMT

Have you run the basics:

1. Ping the IP address of each server from the other.

2. Ping the NetBIOS computer name of the servers. This prove WINS resolution (if you have WINS running of course).

3. Ping the DNS name of the computer to prove DNS resolution is working e.g. computername.domainname.com.

Thanks
Simon

Re: Network Problem

Fabio_56 — Thu, 17 Jun 2004 05:32:51 GMT

Hi Simon

1) I have verified the ping with other server it's always good (I've problem only between two new server).

2) The wins service is up and resolve correctly the servers names

3) The dns service rosolve corectly the servers names.

thanks

Re: Network Problem

Simon Purdue — Thu, 17 Jun 2004 06:12:20 GMT

If you're machines are up-to-date, then I'd change the network cards for a different brand, say a 3Com or Intel.

If the problem is intermittent and event logs don't show anything, then this could point to a hardware failure.

One other thing to try is load the latest Support Pack for the ML370 (here's the Windows 2000 one: http://h18023.www1.hp.com/support/files/server/us/download/18416.html). Once you've got this installed run the HP Systems Management Home Page from Start/Programs/HP Management Agents and drill down to the Network Card properties - you may find some info in there on the condition of the card.

Hope this helps.

Re: Network Problem

Thomas Bianco — Thu, 17 Jun 2004 06:58:03 GMT

stray suggestion: disable the teaming software. we had a few servers go all strange on us but it cleared up when we unteamed the network cards.

also you might check the driver statistics for runts or discards. that could signify noise or surges at the switch.

Re: Network Problem

Anton van Ruitenbeek — Thu, 17 Jun 2004 07:01:23 GMT

Fabio,

Do you have disabled the autonogation of the ports on the hub (I think it will be a switch) and on the NIC of the PC ?

Most of the time this is the reason of sometimes up and sometimes not with 3com.

AvR