Solved

Microsoft Network card shows not connected when really it is

Posted on 2011-03-22
4
209 Views
Last Modified: 2012-05-11
Hi, i have an application which buffers network traffic in the case of a comms outage, when we reconnect the network (turn on the switch) we are finding a random machine (5 connected to switch) will have its nic card status showing not connected. If i go into Network Connections and disable and re-enable the card, normal service is resumed.
Does anyone know why one NIC card seems to go down each time we reboot the switch, i assume the sudden flood of messages is causing the crash. Is there anything in Windows i can change to try and fix the problem?

Thanks
0
Comment
Question by:Jonesey007
  • 2
4 Comments
 
LVL 30

Expert Comment

by:IanTh
ID: 35190407
these days nics can go into sleep mode but I dont know why a switch reboot causes that
0
 
LVL 35

Accepted Solution

by:
Ernie Beek earned 500 total points
ID: 35190439
Did you check the switch to see if it might be an issue there (ports holddown, NAC, etc)?
0
 

Author Comment

by:Jonesey007
ID: 35197303
Hi
Ive got another machine in this state so have alittle more information
The machine looks like it can send, just not receive. This particular example still shows as connected but our app failed and on investigation we can see the connection is down.
So the machine cannot ping other machines. I have setup wireshark and all i am seeing is ARP messages to the Router. When i try and ping another machine, i can see the other machine reply its MAC address which proves outbound is working but this never reaches the terminal.
Any other idea's based on this info?
Thanks
0
 
LVL 35

Expert Comment

by:Ernie Beek
ID: 35197347
You might want to try to set the speed and duplex manually instead of automatically.
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Short answer to this question: there is no effective WiFi manager in iOS devices as seen in Windows WiFi or Macbook OSx WiFi management, but this article will try and provide some amicable solutions to better suite your needs.
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

26 Experts available now in Live!

Get 1:1 Help Now