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For instance, if it's your core switch, and for some reason, you only have one, then you might NOT want to upgrade, unless you HAVE to - and then maybe not to the most recent version, but to the most STABLE version instead.You missed out, necessity A switch in a dusty old broom closet probably doesn't need it's IOS upgraded to the latest IOS for security fixes and new features, if it only has a 10 year old ink jet printer attached.In this environment they were called PRE4 and PRE5, each type requires it’s own image.Also the linecards required a file specific to the routing engine.Many of the routers have redundant routing engines so the images need to be copied onto standby disks as well as the primary disks.The steps required to complete the upgrade looked like this: If you are completely new to Ansible you might want to learn some basics, but it should still be quite easy to follow along.Type "copy flash usbflash1: Name-of-your-backup-IOS" to make a backup copy of your current IOS.
Consideration is given to the role of the device, the redundancy surrounding it, and the impact of the upgrade itself by the downtime incurred or by the possibility of having config feature behavior changes or different defaults when going between major versions.
For example: If you hover your mouse over the filename, you will see some extra information: Above you can see the file name and MD5 checksum.
The checksum can be used to check if the file that you downloaded is the same or has changed. Once you downloaded the IOS image, check if you have enough space left on your flash memory: R1#show flash: -#- --length-- -----date/time------ path 1 1119 Sep 29 2015 r1-r2-r32 1184 Dec 3 2014 R1-R2-ASA1-ASA23 1125 Dec 23 2014 ASA1-R1-R2-R35 76 Jul 17 2014 System Volume Information/Indexer Volume Guid 6 1060 Aug 11 2015 7 1213 Sep 30 2015 8 67926080 Apr 2 2015 c2800nm-adventerprisek9-mz.151-4.
M103862364160 bytes available (137428992 bytes used) On my flash memory, there are a bunch of configuration files and the current IOS image.
There are 3862364160 bytes available (3862 MB) so we have plenty of space. /noverify Don't verify image signature before reload. archive: Copy from archive: file system cns: Copy from cns: file system Copy from file system https: Copy from https: file system null: Copy from null: file system nvram: Copy from nvram: file system pram: Copy from pram: file system rcp: Copy from rcp: file system running-config Copy from current system configuration TFTP (Trivial File Transfer Protocol) is similar to FTP but much simpler, like a light weight version.