upgrade cisco2921 from Version 15.4(2)T1 to 15.7.3M8(MD)

[NetDevOps]

Can I upgrade cisco 2921 router from 15.4(2)T1 directly to 15.7.3M8(MD) ?

[balaji.bandi · Accepted solution]

yes you can do

read the release notes and understand the bug and caveats :

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/15-7m/release/notes/15-7-3-m-rel-notes.html

follow upgrade guide :

https://www.cisco.com/c/en/us/td/docs/routers/access/1900/software/configuration/guide/Software_Configuration/upgrade.html?referring_site=RE&pos=1&page=https://www.cisco.com/c/en/us/support/ios-nx-os-software/ios-software-release-15-7-3-m/model.html

Note: always copy the running-config out of the box, do upgrade in a maintenance window, plan for backout plan.

[Leo Laohoo]

If the DRAM and Flash are within specifications, yes.