Installation guide

Release Notes for the Catalyst 3750 Switch Cisco IOS Release 12.1(14)EA1

OL-4215-01

Downloading Software

Note The CMS is not forward-compatible, which means that if a member switch is running a software version

that is newer than the release running on the command switch, the new features are not available on the

member switch. If the member switch is a new device supported by a software release that is later than

the software release on the command switch, the command switch cannot recognize the member switch,

and it is displayed as an unknown device in the Front Panel view. You cannot configure any parameters

or generate a report through CMS for that member; instead, you must launch the Device Manager

application to configure and to obtain reports for that member.

Downloading Software

These are the procedures for downloading software:

• “Determining the Software Version and Feature Set” section on page 4

• “Determining Which Files to Use” section on page 5

• “Upgrading a Switch by Using CMS” section on page 5

• “Upgrading a Switch by Using the CLI” section on page 5

• “Recovering from a Software Failure” section on page 6

Note Before downloading software, read this section for important information.

Determining the Software Version and Feature Set

The Cisco IOS image is stored as a .bin file in a directory that is named with the Cisco IOS release. A

subdirectory contains the files needed for web management. The image is stored on the system board

Flash device (flash:).

You can use the show version privileged EXEC command to see the software version that is running on

your switch. The second line displays C3750-I5-M for the enhanced multilayer image (EMI) or

C3750-I9-M for the standard multilayer software image (SMI).

Note Although the show version output always shows the software image running on the switch (Layer 2 or

Layer 2/3), the model name shown at the end of this display is the factory configuration (SMI or EMI)

and does not change if you upgrade the software image.

You can also use the dir filesystem: privileged EXEC command to see the directory names of other

software images that you might have stored in Flash memory.