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Failed in Upgrading Firmware’s & Recovering?

Quick notes for myself: Disclaimer! This can be important!

My humble request is that kindly do not take into account ME as Associate in Nursing knowledgeable on these items, I’m NOT certified in something Mikrotik/Cisco/Linux or Windows. But I even have worked with some core networks and that I browse, analysis & strive stuff all of the time. After you are enthralled by personal job & operating united man army, you have got to perform several tasks within which you’re not formally trained for. therefore I’m not speaking/posting regarding stuff I’m erstwhile trained in, I just about go along with expertise and what I even have learned on my very own. And, if I don’t understand one thing then I browse & learn all regarding it.

So, please don’t hold me/my-postings to be invariably 100% correct. I build mistakes similar to everyone else. but – I do my best, learn from my mistakes and check out to assist others

Maybe this post can facilitate another novice like ME

WS-C3650-48PD

Fortunately this model have nice user interface that supports simple upgrade of firmware’s , so I used it to upgrade to latest stable build Fuji-16.9.4

SG300-28PP/SG500-52PP

This model even have nice user interface that supports simple upgrade of firmwares , so I used it to upgrade to latest stable build

3750X-48T-S

WS-C3750E-24TD

OLD version:

WS-C3750E-24TD     12.2(40)SE

Steps for Upgrade:

First setup new or use existing TFTP server, transfer the new code from

https://software.cisco.com/download/home/280831016/type/280805680/release/15.0.2-SE11?i=!pp

& copy the code file (.BIN format) in TFTP root folder. currently from switch console , copy the file from TFTp into switch FLASH

copy tftp: flash:
It will raise the tftp server scientific discipline, and source/destination file name, fill them up as per your native state of affairs

>Address or
name of remote host? <IP_ADDRESS_OF_TFTP_SERVER>
>source filename? <IMAGE_NAME.bin>
>Destination filename? <IMAGE_NAME.bin>
conf t
boot system flash:<IMAGE_NAME.bin>
exit
wr
reload

After this switch can bring up, and new code are overwritten.

New version:

Release 15.0.2-SE11 MD

WS-C3850-24T
Notes

With this model, I encountered few problems in upgrading 3850 switch.

Gibralter sixteen.12.1 impotence : 3850 / Switch was doing bring up in loop with following error
Kernel panic – not syncing: VFS: Unable to mount root fs on unknown-block(1,0)

Fuji 16.9.4 MD : 3850 / Switch Port Orange lightweight issue
With this upgrade , switch shod however all ports lights runed to amber.

Denali 16.3.9 MD : 3850 / Well tested , worked OK
Therefore I reverted back to to Denali-16.3.9 that worked fine & stable.

Steps for Upgrade:

First setup new or use existing TFTP server, transfer the new code from

https://www.cisco.com/c/en/us/support/switches/catalyst-3850-24t-s-switch/model.html#~tab-downloads


>Address or name of remote host? <IP_ADDRESS_OF_TFTP_SERVER>
>source filename?
<IMAGE_NAME.bin>
>Destination
filename? <IMAGE_NAME.bin>
conf t
software install file
flash:cat3k_caa-universalk9.16.03.09.SPA.bin new force verbose

After this switch can raise to reload , do therefore to use changes

New version:
16.3.9

Recovering from IOS unsuccessful upgrade on 3850 Switch
after the Gibralter code upgrade , 3850 switch sebaceous cyst into bring up loop.

Kernel panic – not syncing: VFS: Unable to mount root fs on unknown-block(1,0)

More infor on this issue mentioned here @ https://community.cisco.com/t5/switching/catalyst-c3850-gibraltar-16-12-1-ed/td-p/3907723

After getting into recovery mode , I created the case worsen by deleting some flash files. this can be however I recovered from this case.

from the switch Management port, connect a cable on to your laptop/desktop & assign any personal scientific discipline on the system like 192.168.99.1/24. Install any free TFTP server like SOLARWINDS TFTP Server. copy the stable code like McKinley sixteen.0.3.09 within the tftp root folder.

Cat3k_caa-universalk9.16.03.09.SPA.bin

Now mistreatment any terminal tool like putty, connected to change via CONSOLE port, press MODE button whereas booting & entered RECOVERY mode. & issued following CMD’s

 flash_init
mgmt_init
set IP_ADDR 192.168.99.2/255.255.255.0
set default router 192.168.99.1
emergency-install tftp://192.168.99.1/cat3k_caa-universalk9.16.03.09.SPA.bin

There was another simple methodology by connecting USB into usb port of switch, however since switch might not acknowledge newest usb’s , so I had to require a protracted route of TFTP.

Asad Mukhtar

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