3850 after upgrade cycling through wired charaters and messages

[Difan Zhao]

Hi guys,

I tried to upgrade a 3850 switch from the 3.2.3 to 16.9.4 in the install mode. After the upgrade, the switch does not come up. It is cycling through these messages constantly...

BOOT=flash:packages.conf
CFG_MODEL_NUM=WS-C3850-48PW-SZ
CLEI_CODE_NUMBER=IPMW700ARB
ECI_CODE_NUMBER=466864
LINUX_COREMASK=15
MAC_ADDR=E0:89:9D:25:F1:80
MANUAL_BOOT=no
MODEL_NUM=WS-C3850-48P
MODEL_REVISION_NUM=R0
MOTHERBOARD_ASSEMBLY_NUM=73-14442-10
MOTHERBOARD_REVISION_NUM=A0
MOTHERBOARD_SERIAL_NUM=FOC18452NVE
POE1_ASSEMBLY_NUM=73-14095-01
POE1_REVISION_NUM=B0
POE1_SERIAL_NUM=FOC1845403L
POE2_ASSEMBLY_NUM=73-14095-01
POE2_REVISION_NUM=B0
POE2_SERIAL_NUM=FOC18452FQD
RECOVERY_BUNDLE=sda9:cat3k_caa-recovery.bin
STKPWR_ASSEMBLY_NUM=73-11956-08
STKPWR_REVISION_NUM=B0
STKPWR_SERIAL_NUM=FOC184500TW
SYSTEM_SERIAL_NUM=FCW1845C1SB
TAN_NUM=800-37564-03
TAN_REVISION_NUMBER=A0
TERMLINES=0
USB_ASSEMBLY_NUM=73-12923-05
USB_REVISION_NUM=C0
USB_SERIAL_NUM=FOC18451JHY
VERSION_ID=V04
TEMPLATE=advanced
BSI=0
CALL_HOME_DEBUG=00000
DIAG_DEBUG=000000000000
ABNORMAL_RESET_COUNT=0
SWITCH_PRIORITY=14
RET_2_RTS=23:00:14 UTC Mon Oct 7 2019
SWITCH_NUMBER=2
RANDOM_NUM=1157071131
▒▒▒▒▒▒▒0▒▒▒▒▒▒▒▒,▒▒▒▒<many many more of these>▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒BAUD=9600
BOOT=flash:packages.conf
CFG_MODEL_NUM=WS-C3850-48PW-SZ
CLEI_CODE_NUMBER=IPMW700ARB
ECI_CODE_NUMBER=466864
LINUX_COREMASK=15
MAC_ADDR=E0:89:9D:25:F1:80
MANUAL_BOOT=no
MODEL_NUM=WS-C3850-48P
MODEL_REVISION_NUM=R0
MOTHERBOARD_ASSEMBLY_NUM=73-14442-10
MOTHERBOARD_REVISION_NUM=A0
MOTHERBOARD_SERIAL_NUM=FOC18452NVE
POE1_ASSEMBLY_NUM=73-14095-01
POE1_REVISION_NUM=B0
POE1_SERIAL_NUM=FOC1845403L
POE2_ASSEMBLY_NUM=73-14095-01
POE2_REVISION_NUM=B0
POE2_SERIAL_NUM=FOC18452FQD
RECOVERY_BUNDLE=sda9:cat3k_caa-recovery.bin
STKPWR_ASSEMBLY_NUM=73-11956-08
STKPWR_REVISION_NUM=B0
STKPWR_SERIAL_NUM=FOC184500TW
SYSTEM_SERIAL_NUM=FCW1845C1SB
TAN_NUM=800-37564-03
TAN_REVISION_NUMBER=A0
TERMLINES=0
USB_ASSEMBLY_NUM=73-12923-05
USB_REVISION_NUM=C0
USB_SERIAL_NUM=FOC18451JHY
VERSION_ID=V04
TEMPLATE=advanced
BSI=0
CALL_HOME_DEBUG=00000
DIAG_DEBUG=000000000000
ABNORMAL_RESET_COUNT=0
SWITCH_PRIORITY=14
RET_2_RTS=23:00:14 UTC Mon Oct 7 2019
SWITCH_NUMBER=2
RANDOM_NUM=1157071131

I have tried with reboot. I have tried with pressing mode button while plugging in the power and continue to hold. These message just kept on repeating. I never get the "switch:" prompt. Any idea why? Thanks! 

[Leo Laohoo]

In ROMMON, what happens if you enter the command "boot flash:packages.conf"?

[Difan Zhao]

Sorry for the late response... The email notification for your response was blocked by our email spam filter... I can't get in the ROMMON. The message just kept on repeating without allowing me to enter the mode

[Leo Laohoo]

Console into the switch and reboot.
Post the entire bootup process.

[ashok_boin]

Have you tried holding the "Mode" button for 10secs? If yes & no use, then advise to raise a TAC case as this seems to be a bug or any hw failure.

[Difan Zhao]

Sorry for the late response... The email notification for your response was blocked by our email spam filter... I will receive the switches in the new year and try it myself. The switches were at a remote office. As per my onsite personnel, he did press it for more than 30 seconds. I will report back. Thank you.

[CSCO11737098]

Not to drag up an old post, but what is the difference between the Z version listed here and the regular WS-C3850-48PW-S? I can't find any real references to WS-C3850-48PW-SZ but it does seem valid