作为网络管理员我们经常会碰到交换机无法Login人情况，碰到类似这样的问题通常情况下可以通过Reset Switch 来解决。
How to reset the cisco Castlast switch configure.
1，Reboot switch 9400.
2,Initializing Handware press " Ctrl +C " go to rommon mode..
rommon>set SWITCH_IGNORE_STARTUP_CFG 1
rommon>reset
Do you sich to reset? [y]y
Please wait while the system restarts.
>>>>>>>> >>>
switch>enable
!use below command you will see all of the switch profiles.
switch#show romvar
switch#config t
switch(config)#no system ignore startupconfig
switch#show romvar | in SWITCH
SWITCH_IGNORE_STARTUP_CFG="0"
switch#wr
save the config
