ā10-02-2017 07:44 AM - edited ā03-08-2019 12:14 PM
During a setup of my new cores (2 x 3850 XS switches) running IOS XE 16.6.1 in VSS mode due to an unknown reason one of my switches keeps rebooting after switch election with the following message :
Waiting for 120 seconds for other switches to boot
#######################################################################################################################
Switch number is 2
Chassis 2 reloading, reason - Active/standby selection failed in 1+1 Mode
Oct 2 14:08:18.652 FP0/0: %PMAN-5-EXITACTION: Process manager is exiting: reload fp action requested
Switch rebooted continously for atleast 5 times. Disabling autoreboot
Oct 2 14:08:23.557 RP0/0: %PMAN-5-EXITACTION: Process m
octeon_wdt: WDT device closed unexpectedly. WDT will not stop!
reboot: Restarting system
I have tried to boot without the startup config (as used in the password recovery), and many other things including the full emergency recovery which erases the boot flash: but no success.
Switch refuses to do anything else than looping with the message above.
The other switch is available, and I had a succesfull setup with VSS but again with an unknown reason I found this morning the switch in a continues boot.
As the IOS is recent, I cannot find anything on the web how to solve this issue (VSS is a recent added option to this hardware platform) so any tips on completely factory default my 3850XS or removing / bypasing the VSS stack election would be great !
ā10-02-2017 08:04 AM
Is there a mode button on the model? If yes, hold it down for about 10 seconds and that should put the device into factory default, if not RMA to Cisco, use IOS 03.06.06.E.152-2.E6.bin for now.
HTH
ā10-02-2017 08:09 AM - edited ā10-02-2017 08:10 AM
The mode button does not work other than getting the bootloader prompt. (that's how I was able to do the recover procedures) I could try to downgrade it to a 3 version, is that what you are suggesting ?
RMA is a final resort, so hoping for a "soft" solution here, and as my design is VSS based downgrading to a 3 version is not an option (VSS is not supported), Cisco presales promised me VSS is supported and stable.
Hoping on a soft sollution / someone who experienced and solved this I created this topic.
If worse comes to worse I will create a TAC case for eventualy a RMA procedure.
ā10-05-2017 06:39 AM
So for future reference if any ony finds this .. here is the sollution to get your switch out of the boot loop :
in bootloader mode enter :
Switch: set
you will see outout like below (values may vary)
switch: set
ABNORMAL_RESET_COUNT=0
ASIC_PCI_RESET=1
AUTOREBOOT_RESTORE=1
BOOT=flash:packages.conf
BOOT_LOADER_UPGRADE_DISABLE=1
BSI=0
CFG_MODEL_NUM=WS-C3650-48TQ-L
CLEI_CODE_NUMBER=IPMWC00ARE
CSR_PCIERST_DISCONNECTED=yes
DC_COPY=yes
D_STACK_DOMAIN_NUM=1
ECI_CODE_NUMBER=469509
LICENSE_BOOT_LEVEL=lanbasek9,all:ngwc;
MAC_ADDR=40:01:7A:F4:35:00
MANUAL_BOOT=yes
MODEL_NUM=WS-C3650-48TQ
MODEL_REVISION_NUM=Q0
MOTHERBOARD_ASSEMBLY_NUM=73-15902-05
MOTHERBOARD_REVISION_NUM=A0
MOTHERBOARD_SERIAL_NUM=FDO21252AMQ
RANDOM_NUM=131611057
RECOVERY_BUNDLE=sda9:cat3k_caa-recovery.bin
STACK_1_1=3_0 !!!!!!!!!!!!
SWITCH_IGNORE_STARTUP_CFG=1
SWITCH_NUMBER=1
SWITCH_PRIORITY=15
SYSTEM_SERIAL_NUM=FDO2126V05E
TAN_NUM=800-41241-03
TAN_REVISION_NUMBER=C0
TEMPLATE=advanced
TERMLINES=0
VERSION_ID=V04
issue
switch: STACK_1_1=0_0
boot manually the switch which fails to boot:
Switch:boot
I was able to boot again and log in than I did :
switch clear stack-mode
removed the Virtual stackwise domain :
no stackwise-virtual
And to be sure I reloaded and did a wr erase after that and another reload.
Long story short DO NOT USE IOS XE 16.6.1.
ā04-13-2018 03:53 PM
I had the exact same issue with a Catalyst 9500-12Q. However, the stack variable on that model is read-only. If you try to set the variable to something different, it kicks back "variable is write protected"
I was able to just unset those variables for the stack configuration and it booted normally again.
ā07-05-2019 11:11 PM
We are currently having this issue using 16.6.6 for 3850 stacked switch. Any advise?
ā08-12-2019 07:31 PM
ā09-03-2020 08:59 PM
Thanks - this procedure works for me very well.
ā12-25-2018 05:46 AM
ā10-31-2019 10:31 AM
I had the exact same problem.
Chassis 3 reloading, reason - Active/standby selection failed in 1+1 Mode
Here is the fix....
!--- From the 'switch:' prompt, issue 'set'
set
!--- You'll notice the from the output 'STACK_1_1=2_0'
!--- change this to 'STACK_1_1' by issuing 'unset STACK_1_1' and then 'boot'
unset STACK_1_1
boot
!--- now the switch boots normal
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