Updating ios via xmodem
rommon 2 confreg do you wish to change the configuration? Invoke this application only for disaster recovery. y/n [n]: y Ready to receive file c3640-i-mz.121-7...
After the above message appears u have to download the file using xmodem, the procedure is as follows, 1) Go to Hyperterminal, click Transfer 2) Click on send file 3) click on browse -------- look for the file name in your local "C" drive 4) Below filename field is Protocol ------- change it to xmodem 5) And then clik on send After some time the router will reload itself and will ask you "Press return to get stated" Router en Router#conf t Enter configuration commands, one per line. Router(config)#conf t Router(config)#config-register 0x2102 Router(config)#line con 0 Router(config-line)# speed 9600 --------- Change the speed of the console port to 9600 Then go to Hyperterminal and change baud rate to 9600 in your terminal.
The procedure uses the default console speed of 9600 bits per second. Increasing the console speed (which is possible for the Cisco 26 series routers) helps decrease the time it takes to do the xmodem file transfer. rommon 2 xmodem -c c3640-i-mz.121-7Do not start the sending program yet...
3600 / 2600 in rommon 1- rommon meminfo ---------- to see memory information You are in rommon and 1- when "b" is typed the router comes back in rommon. 3- So the last solution is to download an image using xmodem When in ROMMON mode, follow the procedure below Using the ROMMON confreg utility. File size Checksum File name 4936800 bytes (0x4b5460) 0x2dd7 c3640-i-mz.121-7(bad checksum: 0x13eb) WARNING: All existing data in flash will be lost!
Fortunately, just like upgrading IOS on a Cisco router, it’s an easy, straightforward process that you can knock out in a few minutes. In order to upgrade the software, you’re going to actually acquire the software.
on a WS-C3550 series switch using Tera Term switch: copy xmodem: flash:c3550-ipbasek9-mz.122-40. CCC now send the file by clicking on the top menu: file- xmodem - and chose the file from your local directory the transfer should start now. File "xmodem:" successfully copied to "flash:c3550-ipbasek9-mz.122-40. SE.bin" now you have to boot the image you copied: switch: boot flash:c3550-ipbasek9-mz.122-40. SE.bin"...############ Press RETURN to get started!
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The newer routers allow you to get the router onto the network and TFTP a new IOS in.
So do the 3560X and 3750X, but I’ll get to that in a moment.
