Switch Memory and Configuration

Using the CLI To Implement Configuration Changes

3.Observe the switch’s performance with the new parameter settings to verify the effect of your changes.

4.When you are satisfied that you have the correct parameter settings, use the write memory command to copy the changes to the startup-config file.

Syntax: write memory

For example, the default port mode setting is auto. Suppose that your network uses Cat 3 wiring and you want to connect the switch to another autosensing device capable of 100 Mbps operation. Because 100 Mbps over Cat 3 wiring can introduce transmission problems, the recommended port mode is auto-10, which allows the port to negotiate full- or half-duplex, but restricts speed to 10 Mbps. The following command configures port A5 to auto-10 mode in the running-config file, allowing you to observe performance on the link without making the mode change permanent.

HPswitch(config)# interface e a5 speed-duplex auto-10

After you are satisfied that the link is operating properly, you can save the change to the switch’s permanent configuration (the startup-config file) by executing the following command:

HPswitch(config)# write memory

The new mode (auto-10) on port A5 is now saved in the startup-config file, and the startup-config and running-config files are identical. If you subsequently reboot the switch, the auto-10mode configuration on port A5 will remain because it is included in the startup-config file.

How To Cancel Changes You Have Made to the Running-Config File.

If you use the CLI to change parameter settings in the running-config file, and then decide that you don’t want those changes to remain, you can use either of the following methods to remove them:

■Manually enter the earlier values you had for the changed settings. (This is recommended if you want to restore a small number of parameter settings to their previous boot-up values.)

■Update the running-config file to match the startup-config file by reboot­ ing the switch. (This is recommended if you want to restore a larger number of parameter settings to their previous boot-up values.)

If you use the CLI to change a parameter setting, and then execute the boot command without first executing the write memory command to save the change, the switch prompts you to specify whether to save the changes in the current running-config file. For example:

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