Last Updated on 13/08/2025 by administrator

Cisco C1000 upgrade IOS

Cisco C1000 upgrade IOS [English]

Motivation:

This manual shows how to upload IOS via FTP and upgrade IOS for switch Cisco Catalyst (1000) series.

Implementation – Cisco C1000 upgrade IOS [1]:

In this example we are going to use IOS called c1000-universalk9-mz.152-7.E9.bin. IOS image can be downloaded from this pages: https://software.cisco.com/download/home

Example of copy IOS file from FTP server (running under IP address 192.168.1.10) to C1000 series switch:

SW-C1000#copy ftp://yourlogin:yourpassword@192.168.1.10/c1000-universalk9-mz.152-7.E9.bin flash:

Progress and successful copy of IOS to C1000 switch flash memory:

Destination filename [c1000-universalk9-mz.152-7.E9.bin]?
Accessing ftp://*****:*****@192.168.1.10/c1000-universalk9-mz.152-7.E9.bin...
Loading c1000-universalk9-mz.152-7.E9.bin !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 18179072/4096 bytes]

MD5 verification:

SW-C1000#verify /md5 c1000-universalk9-mz.152-7.E9.bin

Partial output from MD5 verification:

...............................................................................................................................................................................................................Done!
verify /md5 (flash:c1000-universalk9-mz.152-7.E9.bin) = ef02abb004b8693bd22c4d6974ca0ba7

Set Boot Variable:

SW-C1000(config)#boot system flash:/c1000-universalk9-mz.152-7.E9.bin

Check Boot Variable settings:

SW-C1000#show boot | i c1000-universalk9-mz.152-7.E9.bin

Partial output from show boot command:

BOOT path-list : flash:/c1000-universalk9-mz.152-7.E9.bin

Save running-config to startup-config:

SW-C1000#wr

Reboot switch:

SW-C1000#reload

In practise, it took up 3 mins to get connectivity back for model C1000-48T-4G-L.

After reboot check version:

SW-C1000#show version

Partial output from show version command shows that new version IOS 15.2(7)E9 has been loaded and it is working:

Switch Ports Model                     SW Version            SW Image
------ ----- -----                     ----------            ----------
*    1 52    C1000-48T-4G-L            15.2(7)E9             C1000-UNIVERSALK9-M

Optionally delete old IOS image (in this can it was image called c1000-universalk9-mz.152-7.E4.bin):

SW-C1000#del flash:/c1000-universalk9-mz.152-7.E4.bin

All done.

Another article:

How to upgrade Cisco C9300 IOS.