we just recieved our 3850 switches and i have one that will not reboot to the startup config. im pretty sure i can fix the problem in rommon mode but so far nothing works to get it into rommon mode. anyone have any ideas?
Ok I was having the same issue on 3 different 3850s I was finally able to fix it and would like to paste the fix I used here in hopes it will help others.
"show version" display config reg 0x142 (will be 0x102 at next reload)
CSCui54490
Description
Symptom: When start-up configuration is ignored by setting ROMMON boot parameter (SWITCH_IGNORE_STARTUP_CFG) or start-up configuration is removed, the default config register value will be shown as 0x142 instead of 0x102.
C3850#show version | inc register Configuration register is 0x142 (will be 0x102 at next reload)
Conditions: When ROMMON boot parameter "SWITCH_IGNORE_STARTUP_CFG" is set to 1, "show version" command will not display default config register(0x102). OR "system ignore startupconfig switch all" configured under "config t" This command basically sets the SWITCH_IGNORE_STARTUP_CFG to 1. OR "write erase" is executed and switch is booted. Workaround: Steps: 1. Configure "system ignore startupconfig switch all" under "config t". 2. Configure "no system ignore startupconfig switch all" under "config t". 3. Save the config 4. Reload the switch.
Once it is up, the config register should be 0x102. C3850#show version | inc register Configuration register is 0x102
