Updating cisco ios 2950

Recently I was tasked with upgrading one of my 2950 switches from Version 12.1(22)EA13 to EA14, mainly because I wanted some crypto on there to play around with SSH.

Most probably know how to upgrade a router, you assign an IP to the interface connected to your TFTP server and bobs your uncle.

Attach one end of the Cisco serial console cable to the 9-pin serial port on the Windows 7 computer. Select “Connect using:” and then choose the “Com port” in the drop down list, that is being used to connect the Windows 7 computer to the Cisco 2960, and then tap the “Enter” key. Select the “Bits per second:” drop-down box, and then choose the “9600” setting from the list that appears. Touch the “Enter” key and the Cisco command line interface (CLI) appears. Enter the “enable” command at the command prompt, and tap the “Enter” key. After the IOS image file has been transferred to the Cisco 2960, the switch automatically reboots and starts running the new IOS image.

Attach the other end of the Cisco serial console cable to the Cisco 2960 serial console port. Select the “Globe” start button on the Windows 7 computer, then select “Computer” and then navigate to the location where the Hyperterminal application files are stored. Select the “Flow Control” drop down menu, and choose the “None” setting in the list that appears. Enter the Privileged Exec password when requested, and then tap the “Enter” key. Enter “archive download-sw /overwrite /reload tftp:// IOS-file-name.tar” on the command prompt, substituting the “” with the actual name of the IOS update image file that is stored in the root directory of the TFTP service on the Windows 7 computer.

Since you probably only need the uptime information look nine or ten lines down for one of the output lines that starts with the hostname configured on the Catalyst switch and followed by uptime and the amount of time the switch has been running.

Native IOS can also be found with newer software versions that have eliminated Cat OS entirely in favor of IOS, even on hardware that originally required Cat OS.

Catalyst is the brand for a variety of network switches sold by Cisco Systems.

While commonly associated with Ethernet switches, a number of different network interfaces have been available throughout the history of the brand.

Cisco acquired several different companies and rebranded their products as different versions of the Catalyst product line.

The original Catalyst 50 series were based on technology acquired from Crescendo Communications.

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