Catalyst 9500 Standby Switch entered Rommon Mode.

[Ravs]

Hi there. We have encountered a problem with the Catalyst 9500 SVL setup. We noted that the SVL and DAD could successfully be setup. However, after a reboot of the Standby 9500, the switch went in the Rommon Mode. We had to again issue the command : boot flash: IOS Image to bring up the switch again. The value of the Config Register on the Active 9500 is 0x102.

We will be most grateful if someone can advise on this please and any checks we need to do. The status of the stackwise commands is as follows:

Switch# Role Mac Address Priority Version State
-------------------------------------------------------------------------------------
*1 Active c4b2.395f.7660 15 V02 Ready
2 Standby c4b2.3934.2dc0 1 V02 Ready

Switch#show stackwise-virtual dual-active-detection
Dual-Active-Detection Configuration:
-------------------------------------
SwitchDad portStatus
---------------------------
1 TwentyFiveGigE1/0/48 up
2 TwentyFiveGigE2/0/48 up

Stackwise Virtual Link(SVL) Information:
----------------------------------------
Flags:
------
Link Status
-----------
U-Up D-Down
Protocol Status
---------------
S-Suspended P-Pending E-Error T-Timeout R-Ready
-----------------------------------------------
SwitchSVLPorts Link-StatusProtocol-Status
-------------- --------------------------
1 1HundredGigE      1/0/51 U R
HundredGigE           1/0/52 U R
2 1HundredGigE      2/0/51 U R
HundredGigE           2/0/52 U R

[Leo Laohoo]

If the secondary went into ROMMON, I'd like to know what the config-registry value is.
Maybe password-recovery is enabled?

[Ravs]

Thanks Leo.

The 9500s are in production now. I am not really sure how to access the Standby 9500 to check for the Config Register value. But on the active switch it is 0x102.

Is there any command to check for the Standby Config Register value from the Active Switch. 

Regards

[balaji.bandi]

you can issue :

##show redundancy and post the output here 

Can you explain how the steps you followed to build this StackWise virtual to understand the problem in a better way?

[Ravs]

Thanks a lot Balaji

The output of the show redundancy is as follows:

show redundancy
Redundant System Information :
------------------------------
Available system uptime = 2 days, 9 hours, 59 minutes
Switchovers system experienced = 0
Standby failures = 0
Last switchover reason = none

Hardware Mode = Duplex
Configured Redundancy Mode = sso
Operating Redundancy Mode = sso
Maintenance Mode = Disabled
Communications = Up

Current Processor Information :
-------------------------------
Active Location = slot 1
Current Software state = ACTIVE
Uptime in current state = 2 days, 9 hours, 59 minutes
Image Version = Cisco IOS Software [Fuji], Catalyst L3
Switch Software (CAT9K_IOSXE), Version 16.9.4, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2019 by Cisco Systems, Inc.
Compiled Thu 22-Aug-19 18:14 by mcpre
BOOT = bootflash:packages.conf;
CONFIG_FILE =
Configuration register = 0x102

Peer Processor Information :
----------------------------
Standby Location = slot 2
Current Software state = STANDBY HOT
Uptime in current state = 2 days, 9 hours, 56 minutes
Image Version = Cisco IOS Software [Fuji], Catalyst L3
Switch Software (CAT9K_IOSXE), Version 16.9.4, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2019 by Cisco Systems, Inc.
Compiled Thu 22-Aug-19 18:14 by mcpre
BOOT = bootflash:packages.conf;
CONFIG_FILE =
Configuration register = 0x102

The steps followed is as follows

stackwise-virtual
domain 1
exit

inter ran Hu1/1/3, Hu1/1/4
stackwise-virtual link 1

int Twe1/0/48
stackwise-virtual dual-active-detection

switch 1 priority 15


Switch 2
stackwise-virtual
domain 1
exit

inter ran Hu1/1/3, Hu1/1/4
stackwise-virtual link 1

int Twe1/0/48
stackwise-virtual dual-active-detection

Reload Switch 1 and Switch 2

Please let me know of any queries.

Regards

[balaji.bandi]

check the boot variable as per the below document do necessary changes write and reload and test it.

BOOT = bootflash:packages.conf;

https://www.cisco.com/c/dam/en/us/products/collateral/switches/catalyst-9000/nb-06-cat-9k-stack-wp-cte-en.pdf

[Leo Laohoo]

Console into the secondary switch and reboot.
I want to see why it is booting into ROMMON.

[Ravs]

Thanks Leo

Currently the Standby Switch has the Console disabled.

Do you need me to Connect the Console Cable and then Remove the Power Cords
and then Plug it back again.

Regards

[Leo Laohoo]

If it is possible, yes.

[Ravs]

Hi Guys.

We are scheduling a reboot on the Cisco 9500 SVL Standby Switch and will be most grateful if you can assist with the following since after this we will not be able to reboot the standby switch and need your advice if the below steps will be ok. I am suspecting that the Standby Switch will be in Bundle Mode now after we issued the command boot flash: IOS Image.bin - Also assuming that the Active Switch would be in the Install Mode.

Thus after Reboot of the Standby Switch, 

1. If the switch enters the Rommon mode again, we will enter the following command

BOOT = bootflash:packages.conf;

               But can i enter the above in the Rommon Mode. 

Then enter the command install add file flash:cat9k_2.bin activate commit

              But also can I enter this command in the Rommon Mode.

How do we also check for the config register value and amend it to 0x102 on the Standby Switch in the Rommon Mode before we reboot if required.

2. Then  will reset the switch

Hopefully it does not go in the rommon mode. 

We will be most grateful for any help and correcting the steps above and will be happy for any other advice as well.