Resolving IP address connectivity issues

Investigation

Verify lack of connectivity to the server enclosure

Use the ping command inside a command prompt or the Attempt connection page in the DS Storage Manager to attempt to retrieve IP address and network configuration information from the server enclosure. If you are able to retrieve the IP address and network information, attempt to perform the action again. If you are unable to retrieve the IP address and network configuration information, continue with the rest of these procedures.

Check the cabling between the management console and the server enclosure

Check that the cabling between the management console and the server enclosure has not become loose or dislodged.

Check that all of the cables are operational

If a cable develops a fault and you had connectivity prior to the error, you might receive an error entry or message stating that the connection to the server enclosure has been lost. Replace the specified cable to regain connectivity to the expansion enclosure.

If the DS Storage Manager still cannot locate the server enclosure

Follow the steps below to reset the IP address on the processor card in the server enclosure to the default IP address. Attempt to reconnect to the server enclosure using the default IP address after you complete these steps.

1. Use the serial conversion cable that was shipped with the enclosure to attach your computer to the serial port on the enclosure.
2. Use a terminal emulator to connect to the server enclosure through the serial port that is located on the processor card (for example, NetTerm or Windows^® HyperTerminal). If you are using Windows HyperTerminal, you might need to provide a connection name and icon before you can specify the connection settings. Choose a communications port, such as COM1 or COM3, and connect to the processor card using following settings:

   Remote connection setting	Remote connection value
   Bits per second	38400
   Data bits	8
   Parity	None
   Stop bits	1
   Flow control	Hardware

3. Use the default user ID of guest to access the processor card. The ncnetconf script begins automatically.
   Note: Use the password that you assigned to the guest user ID when you set the initial IP addresses on the processor cards.
4. After the program has started, select Configure network parameters from the ncnetconf Main Menu options.
5. To reset the IP address, perform the following steps:
   1. Choose Reset to default static IP network configuration from the Network configuration menu options. You will receive a confirmation that the default IP address has been changed to the following defaults:
      • 172.30.143.213 for cluster0
      • 172.30.143.214 for cluster1
      Note: The ncnetconf program prevents you from setting an IP address and network mask combination that conflict with any of the following IP addresses:

      • 172.30.143.213
      • 172.30.143.214
      • 192.0.2.0
      • 192.0.2.1
   2. Select Back to Main Menu to return to the ncnetconf Main Menu.
   3. Select Apply changes and exit from the options in the main menu to save your changes and exit the application.
6. After you are able to connect to the server enclosure, set the IP addresses on each processor card to meet your network needs.

If, after you complete all of the steps above, the DS Storage Manager cannot communicate with the server enclosure, call IBM Support.

IBM Support personnel can determine the cause of the problem and find a resolution that will regain connectivity to the storage.