You can configure username and password pairs, which are locally stored on the switch. These pairs are assigned to lines or ports and authenticate each user before that user can access the switch. If you have defined privilege levels, you can also assign a specific privilege level (with associated rights and privileges) to each username and password pair.
Configuring Username and Password Pairs
Follow these steps to configure username and password pairs:
SUMMARY STEPS
1. enable
2. configure terminal
3. username name [privilege level] {password encryption-type password}
4. Use one of the following:
line console 0
line vty 0 15
5. login local
6. end
7. show running-config
8. copy running-config startup-config
Please refer http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/15-0_2_EX/security/configuration_guide/b_sec_152ex_2960-x_cg/b_sec_152ex_2960-x_cg_chapter_0100.html
