Administration Guide

Changing extension nodes and extension node adapters

You can change information for extension nodes and extension node adapters that you've already defined in the SDR by using either the SMIT or the command line.

Whichever way you choose, after changing the information in the SDR, the extension node has to be reconfigured to make the changes become effective. Which steps to perform and in which sequence, depends on which attributes you plan to change. Consider each step in the following procedure and perform it if it applies to your circumstances:

1. IBM suggests you run the Efence command to fence the extension node before making any changes.
2. If you intend to change the network address (IP address) of the extension node adapter, you have to remove the current interface (or IP address) on the extension node adapter before you reconfigure the extension node adapter. Run the following commands on the extension node adapter:

   ifconfig gt0x0 down
   ifconfig gt0x0 delete
   

   where x is the slot number, in hexadecimal notation, of the extension node adapter.

3. If you choose to use SMIT and you specify yes for the option Reconfigure the extension node, it will reconfigure the node as part of changing the SDR information. You can also choose to reconfigure it later. Decide whether to use SMIT or the command line and make your change.
4. If you did not have SMIT reconfigure the extension node or if you used the command line, use the instructions in Reconfiguring extension nodes and extension node adapters to do it now.
5. If the switch automatic unfence feature is enabled and the extension node is in the autojoin state, the node should automatically join the switch after it tests ready. To bring the extension node on the switch if the automatic unfence feature has been disabled or if the extension node is not in the autojoin state, run the Eunfence command after the extension node has been reconfigured.
6. Verify that the changes you specified have been made. See Listing extension node and extension node adapter information.

From SMIT

1. Access the Extension Node Database Information menu:

   ENTER

   smit enter_extdata

   • The Extension Node Database Information menu appears.

2. Change information in the SDR for extension nodes:

   SELECT

   Enter Extension Node Information

   • The Enter Extension Node Information menu appears.

   ENTER

   Enter new values for the extension node attributes you wish to change. (See Adding extension nodes and extension node adapters for a description of these values.)

   Note:

   You cannot change the node number of the extension node. You must remove the extension node number from the SDR (by using the SMIT menus described in Removing extension nodes and extension node adapters or the enrmnode command) and add it back with a new node number (by using the SMIT menus described in Adding extension nodes and extension node adapters or the endefnode command).

   SELECT

   OK

3. Return to the Extension Node Database Information menu.
4. Change information in the SDR for extension node adapters:

   SELECT

   Enter Extension Node Adapter Information

   • The Enter Extension Node Adapter Information menu appears.

   ENTER

   Enter new values for the extension node adapter attributes you wish to change. (See Adding extension nodes and extension node adapters for a description of these values.)

   Note:

   You cannot change the node number of the extension node. You must remove the extension node number from the SDR (by using the SMIT menus described in Removing extension nodes and extension node adapters or the enrmnode command) and add it back with a new node number (by using the SMIT menus described in Adding extension nodes and extension node adapters or the endefnode command).

   SELECT

   OK

From the command line

1. Use the endefnode command with the appropriate flags and operand to change the definition for an extension node in the SDR.
2. Use the endefadapter command with the appropriate flags and operand to change the definition for an extension node adapter in the SDR.

See the book PSSP: Command and Technical Reference for details on these commands.