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Nexus 3500 failed downgrade from 7.x to 6.x

dusintoddsfire
Level 1
Level 1

Nexus 3548X will no longer boot after incorrectly trying to downgrade to 6.x. I am trying to figure out how to recover from this at boot prompt but haven't so far. Any pointers on how to get out of this appreciated. I figure I need to boot from the network but how to do that is none obvious to me. 

 

(c) Copyright 2016, Cisco Systems.
BIOS v.4.2.0, Sat 09/23/2017, 08:39 AM
N3K-C3548P-10GX
Press ctrl L to go to loader prompt in 2 secs

Booting kickstart image: bootflash:/n3500-uk9-kickstart.6.0.2.A8.8.bin

...............................................................................
..................................Image verification OK


## get_boot_mode_from_bios, ios_mode : 0, boot_mode : 0
Booting kernel
[ 0.000000] Fastboot Memory at 0c100000 of size 201326592
▒Usage: init 0123POST INIT Starts at Mon Jan 1 00:00:26 UTC 2001
Starting Nexus 3500 Platform POST.....
Executing Mod 1 1 SEEPROM Test:...done (0 seconds)
Executing Mod 1 1 GigE Port Test:.done (8 seconds)
Executing Mod 1 1 PCIE Test:.................done (0 seconds)
Mod 1 1 Post Completed Successfully
POST is completed
...r. done.
Loading System Software Sun Dec 31 19:00:52 EST 2000

load_plugin: failed to link plugin file from /isan/plugin/0. (rc = 0x40ea001f)
Extract plugin 0 failed
Remove plugin 0
Load plugin failed
INIT:
INIT: Sending processes the TERM signal
INIT: Sending processes the KILL signal
Cisco Nexus Operating System (NX-OS) Software
TAC support: http://www.cisco.com/tac
Copyright (c) 2002-2018, Cisco Systems, Inc. All rights reserved.
The copyrights to certain works contained in this software are
owned by other third parties and used and distributed under
license. Certain components of this software are licensed under
the GNU General Public License (GPL) version 2.0 or the GNU
Lesser General Public License (LGPL) Version 2.1. A copy of each
such license is available at
http://www.opensource.org/licenses/gpl-2.0.php and
http://www.opensource.org/licenses/lgpl-2.1.php
switch(boot)# ## get_boot_mode_from_bios, ios_mode : 0, boot_mode : 0
switch(boot)# Booting kernel
^
% invalid command detected at '^' marker.

01326592
▒Usage: init 0123POST INIT Starts at Mon Jan 1 00:00:26 UTC 2001
Starting Nexus 3500 Platform POST.....
Executing Mod 1 1 SEEPROM Test:...done (0 seconds)
Executing Mod 1 1 GigE Port Test:.done (8 seconds)
Executing Mod 1 1 PCIE Test:.................done (0 seconds)
Mod 1 1 Post Completed Successfully
POST is completed
...r. done.
Loading System Software Sun Dec 31 19:00:52 EST 2000

load_plugin: failed to link plugin file from /isan/plugin/0. (rc = 0x40ea001f)
Extract plugin 0 failed
Remove plugin 0
Load plugin failed
INIT:
INIT: Sending processes the TERM signal
INIT: Sending processes the KILL signal
Cisco Nexus Operating System (NX-OS) Software
TAC support: http://www.cisco.com/tac
Copyright (c) 2002-2018, Cisco Systems, Inc. All rights reserved.
The copyrights to certain works contained in this software are
owned by other third parties and used and distributed under
license. Certain components of this software are licensed under
the GNU General Public License (GPL) version 2.0 or the GNU
Lesser General Public License (LGPL) Version 2.1. A copy of each
such license is available at
http://www.opensource.org/licenses/gpl-2.0.php and
http://www.opensource.org/licenses/lgpl-2.1.php
switch(boot)#

1 Reply 1

Kirk J
Cisco Employee
Cisco Employee

Greetings.

Below describes the process to get kickstart/system over from tftp server.

 

Video of process: https://supportforums.cisco.com/t5/data-center-videos/how-to-restore-a-cisco-nexus-switch-from-loader-prompt/ba-p/3101970

 

Cntrl + L to get break into boot loader

loader > set ip x.x.x.x 255.255.255.0

loader > boot tftp://x.x.x.x/n3500-uk9-kickstart.6.0.2.A8.9.bin

kick start will load up.

....

int mgmt0

  ip address x.x.x.x 255.255.255.0

  no shut

copy tftp: bootflash:

Enter source filename: n3500-uk9-kickstart.6.0.2.A8.9.bin

Enter hostname for the tftp server: x.x.x.x

copying........

 

switch(boot)# copy tftp: bootflash:
Enter source filename: n3500-uk9.6.0.2.A8.9.bin
Enter hostname for the tftp server: x.x.x.x

copying.....

 

switch(boot)# dir

  should see 2 .bin files you just copied

 

reload

 

Cntrl + L to break into boot loader again

 

now boot your kickstart and system image from your local bootflash

loader > boot n3500-uk9-kickstart.6.0.2.A8.9.bin n3500-uk9.6.0.2.A8.9.bin

 

You should get a setup prompt from here.

Hopefully you have a copy of your running config.

 

Assumptions:

your kickstart and system images are at root of your tftp server in examples above.

 

If you still have issues, I would open a TAC case for assistance.

 

Thanks,

Kirk...

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