brmlab

• connect to management
  • null-modem cable on the Console port, 19200 8N1, no hw flow, sw flow yes
  • 1x/2x [enter] for a login prompt.
  • telnet to a known TCP/IP address. 1x/2x [enter] for a login prompt.
• login:
  • admin/(no password)
  • security/security

Login: admin
Password: 

Menu options: -------------3Com SuperStack 3 Switch 3300TM--------------
 bridge             - Administer bridging/VLANS
 ethernet           - Administer Ethernet ports
 feature            - Administer system features
 ip                 - Administer IP
 logout             - Logout of the Command Line Interface
 snmp               - Administer SNMP
 system             - Administer system-level functions

Type ? for help.
----------------------------------Switch 3300TM (1)---------------------
Select menu option: 

• to reset factory defaults, type SYSTEM[enter] then type INITIALIZE[enter]. This will reset everything that has been set up on the switch, with the exception of the TCP/IP address, if there is one. All other previous configurations will need to be re-entered.

Select menu option (system): INITIALIZE
Initializes the system to factory defaults and causes a reset.
Do you wish to continue (yes,no) [no]: yes

You can type in username “3comcso” and password “RIP000”. It will ask you to reinitialize the switch. This will reset all settings including passwords.