Network Troubleshooting - Windows

= >> Information that we must have in a ticket <<=

Name and location (building, room #). Make sure we have their extension or cell #. Jack ID (it’s on a silver or white tag around or ON the jack, e.g. "A-0-12"). 'IP address,MAC addressandthe result of running the "arp -a" command.

midd_secure

If user can't connect to midd_secure:

• Does the connection repeatedly ask for the user's credentials? Check whether user can get onto webmail. If not, might be using wrong PW/UN or account could be locked out.
  

• See the Wireless article's information on how to connect.

Common error messages

• "Trust relationship with server could not be established." The computer likely needs to be re-added to the domain or needs its name checked. Usually this message will only happen with lab computers, which are under DeepFreeze so we can't make any meaningful changes - Networks will have to deal with it. Get any information you can think of (Is it just one computer, or all in a specific area? MIDD numbers? Does it go away on restarting?) and assign to SR.

General network troubleshooting steps

• Run ipconfig then look for the message under “Media State” (if there is one) and check IP addresses.

1. Message: “Media is disconnected” – NIC thinks it’s unplugged. Possible solutions:
   1. Loose cable (“ensure that both ends of the cable are firmly connected”)
   2. Wrong jack (red jack or “Data” jack = GOOD; blue jack is turned OFF, usually)
   3. Bad cable (try a different cable), bad jack (try another jack or connect another computer to the original jack), bad network card (invite customer to LIB202)
2. See Network Troubleshooting for what some IPs may indicate. In ANY case, here are some generic steps to try:
   1. [ ipconfig /release followed by ipconfig /flushdns and ipconfig /renew ]
   2. Disable the connection in Control Panel, wait 5 seconds, re-enable it.
   3. Unplug jack, wait 5 seconds, plug back in. Doesn’t help? - Reboot.
   4. Try disabling 3^rd party firewall software (e.g. Norton, McAfee, etc. may interfere with our network). Also, check to see if the browser has a proxy server configured.

If you still can't resolve the issue after these steps, get some information from the customer:

• Name and location (building, room #). Make sure we have their extension or cell #.
• Jack ID (it’s on a silver or white tag around or ON the jack, e.g. “A-0-12”).
• The customer then should runipconfig /all andtell youthe message under “Media State” (if there is one), theIP address, Physical (aka MAC) address andtheDHCP server address (if there is a DHCP address listed).
• If there is a DHCP address, customer should ping the DHCP server address, run arp -a and tell you the output of arp.
• Record all of the above and create a ticket for SR.

Computer has a valid IP, but cannot open webpages

• Disable 3rd party Firewall (Norton, McAfee, Trend Micro)
• Reset IP and Winsock: Start => Run => CMD

netsh winsock reset
netsh int ip reset c:\reset.log

• See Resetting Winsock Catalog for more details.
• Reboot

Troubleshooting Network Issues with Vista

Please see above. If you want to delve deeper here are some Advanced_Network_Troubleshooting topics.

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