Cisco (Cisco) switches? C3750-e? 6. Upgrading the ISO

"Introduction" Cisco switch Catalyst 3750-e Series production in 2007, the original system is very old, in order to let it out of the spring, we can upgrade its system.

Pre-upgrade preparation

First we need a new version of the Catalyst 3750-e Series Cisco switch ISO file, online searchable to many, here we recommend a 2015-year version of the download link is:

Cisco switch Catalyst 3750-E Series ISO (2015)

Then we need a TFTP server software, there are many, commonly used Cisco TFTP and 3CDaemon and so on, because the test 3CDaemon upload large files more stable, so we recommend the use of 3CDaemon, download links are:

TFTP Server tool 3CDaemon

Unzip the downloaded 3CDaemon compressed document to the D-disk 3CDaemon directory, and copy the downloaded 3750 thought switch IOS to that directory.

① into the 3CDaemon directory, you can see the Cisco IOS files about 20M. Double-click 3CDaemon to start the TFTP service.

② Double-click the Set TFTP Server button.

③ both the upload and download directories are set to 3CDaemon in the directory. So TFTP is set up.

View current ISO version

You can run the show version command in privileged mode to view the current IOS version information.

① can see iOS files as System image file is "Flash:/c3750e-universalk9-mz.122-40.se.bin" , Version 12.2 (+) SE.

You can run the dir command in privileged mode to view the current FLASH content.

②flash can be understood as the computer's hard disk, which is used to store the boot system files, which shows a. bin IOS file, and one. SE2, this is a subdirectory. 、

You can run the CD command in privileged mode to enter the appropriate subdirectory to view the contents of the directory, which is the same as the DOS operation of the computer.

③ You can also use show boot to determine the startup file in case you are unsure which iOS file to start.

④ can be sure that the boot is the root directory of the iOS files, the subdirectory under the iOS file is redundant.

backup IOS and boot profiles

Before upgrading iOS, it's a good idea to back up the original iOS files to prevent the upgrade from failing with a chance to restore.

The ① Backup command is simple, copy the ISO file from the root of the flash to the TFTP server, and the following is the TFTP address, which is the computer address that starts 3CDeamon. If the file name does not change, then directly enter, appear! After copying, you can see the size of the file and the time it took to copy it.

② all configurations are lost after upgrading iOS, it is also recommended that you back up your boot configuration files.

③ look at the 3CDaemon directory, backup files and upgrade files are all in.

Delete an existing IOS file

Why would you want to delete an existing iOS file? The reason is that there is not enough flash space.

① the dir command to see less than 17M of space in the Flash, while the upgraded file is about 20M

② Delete the launched IOS file via the delete command and press ENTER two times to confirm.

③ again with the dir command to see, the. bin iOS file is missing, flash free space is 28M.

④ is deleted with the same file. SE2 directory, but can not be like a DOS directly connected to the directory of files once deleted,delete command plus parameter /recursive/foce on it.

uploading IOS files

After the FLASH of old iOS is deleted, you can upload a new iOS file.

① also uses Copycommand, copy the TFTP server contents into FLASH, enter the TFTP address, the file name to be copied, enter the confirmation, and the copy process will be prompted.

② through the dir command can the new IOS have been uploaded successfully.

Modify the boot IOS file

After uploading the new IOS file, you will need to modify the startup file name.

① Enter global configuration mode, use the boot System command to set the boot file to the new iOS file name under FLASH root.

② into privileged mode, execute WriteSave the configuration, execute Reloadcommand to restart the switch.

Verify that the new IOS

After restarting, the first start of the new iOS will be slow, need to wait a period of time, there will be two times the "huge" fan turn, ignore, back and restart when it is normal.

① re-use Show VersionCommand view, surprise to see the version has been upgraded to 2015 15.0 (2) version SE8.

② confirm that the boot file is a newly uploaded file by using the show Boot command. Upgrade iOS success!!!

To Restore a startup configuration file

After upgrading IOS, the original configuration is gone, and in order to not reconfigure it, you can restore the backup profile back.

① with copy command, copy the TFTP server content to FLASH, enter the TFTP address, to copy the boot configuration file name, return to the system default boot configuration file name, and then enter to confirm it, restart the switch after the configuration takes effect. This will restore the original configuration.

Cisco (Cisco) switches? C3750-e? 6. Upgrading the ISO