Cisco IOS Upgrade Using USB Flash

Cisco IOS Upgrade

3 Easy steps to upgrade the software version of a Cisco ASR Series Router.


Step 1
Go to romon mode pressing Ctrl+C during boot of the router hardware.
Step 2
 Find the USB Device attached in USB Port of the router and find the | file path using “dev” and “dir” command consecutively.
Step 3
 Boot from USB Drive directly using the full path of the file located in USB Drive.

Log File
System Bootstrap, Version 15.4(3r)S4, RELEASE SOFTWARE (fc1) Technical Support: https://www.cisco.com/techsupport Copyright (c) 2014 by cisco Systems, Inc. Compiled Fri 20-Jun-14 17:24 by alnguyen Boot ROM1CYLON not detected.. UEA platform with 3670016 Kbytes of main memory Warning: filesystem is not clean Located asr920-universalk9_npe.03.14.02.S.155-1.S2-std.bin Image size 266519148 inode num 14, bks cnt 65069 blk size 8*512 ############################################################################################# Autoboot: aborted due to user interrupt [CTRL-C] monitor: command "boot" aborted due to user interrupt rommon 1 > rommon 2 > rommon 2 > rommon 3 > rommon 4 > rommon 5 > dev Devices in device table: id name bootflash: Internal disk usb0: USB disk rommon 6 > dev usb0: Devices in device table: id name bootflash: Internal disk usb0: dirB disk rommon 7 > rommon 8 > dir usb0: Checking USB devices.. USB EHCI 1.00 scanning USB bus for devices.. 2 USB Device(s) found scanning bus for storage devices... USB Mass Storage device detected 1 Storage Device(s) found File System: FAT32 1900762 0 drw- System Volume Information 358594 0 drw- ¦ 364718 1833 -rw- Removable Drive (8GB).lnk 364719 0 drw- CCNA VIDEOS 528325 0 drw- Route_642-902 1036248 0 drw- Switch_642-813 1189933 0 drw- TSHOOT_642-831 1214017 0 drw- ZOOM CCNP 1245186 266519148 -rw- asr920-universalk9_npe.03.14.02.S.155-1.S2-std.bin rommon 9 > rommon 10 > boot usb0:asr920-universalk9_npe.03.14.02.S.155-1.S2-std.bin Located asr920-universalk9_npe.03.14.02.S.155-1.S2-std.bin, start cluster is 1245186 #.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#. Image loaded Boot image size = 266519148 (0xfe2c26c) bytes Package header rev 0 structure detected Calculating SHA-1 hash...done validate_package: SHA-1 hash: calculated c5a890a9:e887f7d3:a8d6eb65:05df033c:3dcf80a8 expected c5a890a9:e887f7d3:a8d6eb65:05df033c:3dcf80a8 Image validated Passing control to the main image..
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