go on CLI (serial cable/ Serial cable to USB / console cable / or connect via the IP address you are reaching the GUI from Windows cmd: telnet <ip> or use a ssh client---- I think telnet is enabled by default, if not enable via GUI on Security->TCP/UDP services)
Take a look at current config
type:
show running-config
take a look at the entries of the interfaces and lookup for strange things and issue these commands too:
show interfaces status
show interfaces configuration detailed
show interfaces protected-ports detailed
show interfaces switchport GE 9
show interfaces switchport GE10
show port monitor
show ports security
(that's to know if the ports are belonging to some vlan and the PVID is not 1, or if the port is security locked, or if it is configured as mirroring another port and to see if it is really up)
additionally you could try:
show errdisable interfaces GE 9
show errdisable interfaces GE 10
show green-ethernet
show cable-diagnostics cable-length
(it's gotta show either <50 or the length)
in any case shut the interfaces down manually and bring them up manually (just type after the # :))
#config
(config)#interface range ge9-10
(config-if-range)#shutdown
(config-if-range)#no shutdown
(config-if-range)#do show interfaces status
(config-if-range)#exit
(config)#exit
#
try to connect again, if not then backup your config (GUI save as text and encrypted passwords) and go on GUI ->Administration->reboot->click delete startup config, and restore to factory defaults, then reboot.
If not then your unit is damaged!
