9300 Stack Redundancy not rebuild after Reboot

[BorislavPenchev0962]

Hi,

we have a Stack 2x C9300L-24P-4X
did Switch reboot, but noticed that switch does not change to Role to "Standby" , but to Role "Member" instead
- in "Redundant System Information" is Hardware Mode = Simplex (instead of Duplex)

How can we ensure that switch will join back and not fly out after reboot ?

#sh redundancy
Redundant System Information :
------------------------------
Available system uptime = 6 days, 17 hours, 12 minutes
Switchovers system experienced = 0
Standby failures = 0
Last switchover reason = none

Hardware Mode = Simplex
Configured Redundancy Mode = sso
Operating Redundancy Mode = Non-redundant
Maintenance Mode = Disabled
Communications = Down Reason: Failure

Current Processor Information :
-------------------------------
Active Location = slot 1
Current Software state = ACTIVE
Uptime in current state = 6 days, 17 hours, 12 minutes
Image Version = Cisco IOS Software [Amsterdam], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 17.3.4, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2021 by Cisco Systems, Inc.
Compiled Sat 03-Jul-21 01:55 by mcpre
BOOT = flash:packages.conf;
CONFIG_FILE =
Configuration register = 0x102

Peer (slot: 0) information is not available because it is in 'DISABLED' state

Best Regards

Boris

[balaji.bandi]

post  below output :

#show switch detail

#show switch stack-ring speed

If you like provisionbing you can do below config also setup a priority so master can be elected.

switch 1 provision c9300-XX
switch 2 provision c9300-XX

[BorislavPenchev0962]

here the output:

#sh sw detail

Switch/Stack Mac Address : *8.4e80 - Local Mac Address

Mac persistency wait time: Indefinite

H/W Current

Switch# Role Mac Address Priority Version State

-------------------------------------------------------------------------------------

*1 Active *.4e80 1 V01 Ready

2 Member *.5e80 1 V01 Ready

Stack Port Status Neighbors

Switch# Port 1 Port 2 Port 1 Port 2

--------------------------------------------------------

1 OK OK 2 2

2 OK OK 1 1

#sh switch stack-ring speed

Stack Ring Speed : 320G

Stack Ring Configuration: Full

Stack Ring Protocol : StackWise

Provisioning was already configured, here output from Running config:

switch 1 provision c9300l-24p-4x

switch 2 provision c9300l-24p-4x

BR

[BorislavPenchev0962]

Hi, 

l think the output looks fine, do you find anything suspicious ?

Best Regards

Boris

[balaji.bandi · Accepted solution]

I do not see any issue here as per the output.

Turn off whole stack and bring back and test it. (if you going this route, make switch priority also, and save the config - before you reload)

[BorislavPenchev0962 · Accepted solution]

we did the following:
remove Stacking Cables

delete Stack 1+1-Mode with command "unset STACK_1_1" (in ROMmon Mode/console).

after cold boot the switch was again in Stack and it took 5min to take the Standby Role .

thanks for help !