Cisco provides two major commands to check IOS version and related information includes model number, types of interfaces, amount of memory, software version, and configuration setting.The first popular command is “show version” to check IOS info.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.When your router is unable to boot up normally, please scroll down to the bottom of the page for suggestions.* Under any circumstances, DO NOT delete working IOS image off the flash memory unless the image has been backed up to server (TFTP or FTP server) or you have working IOS image stored in the server.Later description will show you how to back up the image* There is a chance that a router loses power or loses connection during the IOS image transfer (copy from or to server) which may cause the router to have no working IOS image to boot up from. Try the following* Backup image to TFTP server * Download image from TFTP server For those routers or switches that have USB port, you can use USB Flash drive to backup or to download IOS images as follows* Backup image to USB Flash drive * Download image from USB Flash drive Once you have both old and new IOS images in USB Flash drive, you can either save copies to your computer or to some storage such as DVD, tape backups, or some FTP servers.For example, 12.1(8)E14 is a Rebuild, the 14 denoting the 14th rebuild of 12.1(8)E.Cisco network equipment is powered by the Cisco IOS software which is stored in flash memory of the router and moved into the RAM during boot process.
Catalyst is the brand for a variety of network switches sold by Cisco Systems.
I had 6 switches that got botched today and we only have 2 laptops so I spent 2.5 hours (38 min/switch minimum) babysitting the laptops while they download the new binary.
Obviously if I don't have time to do the firmware over Tel Net I don't have time to do it out in the field, at least not at the amount of time it's costing me. Sounds like you already have IP addresses on the boxes, so a central TFTP server that can handle multiple simultaneous downloads should do the trick.
Through the CLI, the commands available to each privilege level can be defined. Using the Embedded event manager feature, the interpreter can be scripted to react to events within the networking environment, such as interface failure or periodic timers.
Available command modes include: Rebuilds – Often a rebuild is compiled to fix a single specific problem or vulnerability for a given IOS version.