want to locate Username and Password.

[Saqib Javed]

Hi, 

My switch is HP procurve 3400 cl. I did reset and clear buttons for few sec press, but after rebooting I need to enter the username and password. please let me know that default username/password should be used after entering enable mode. 

Saqib 

[Mik-HPN]

It all depends on what you did.

1. Pressing the Clear button alone for one second resets the password(s) con-figured on the switch.
2. Pressing the Reset button alone for one second causes the switch to reboot.
3. Press and hold the Reset button and press and hold the Clear button, release the Reset button and wait for about one second for the Self-Test LED to start flashing then release the Clear button, this process restores the switch configuration to the factory default settings.

Front-Panel-Security see page 2-8 and forward.

http://ftp.hp.com/pub/networking/software/Access_Security-5300xl-3400cl.pdf

If front-panel-security was enabled and depending on the config (2-18) you might need to contact support for a one time password see 2-20.