02-04-2019 02:43 AM - edited 03-08-2019 05:13 PM
Hi,
We have a pair of 4500X-16's running in VSS mode, unfortunately they are still on 3.6.3E and need upgrading to 3.8.7.
I have read I cannot go directly to 3.8 from 3.6 and the documentation is a little confusing so can I upgrade in the following way ?
3.6.3 -> 3.7.3 -> 3.8.7 ?
Also what is the best method for doing the upgrade ?, I have C.N.A available and command line.
If command line do i use issu or the copy tftp method with a manual reboot ?
Regards
Scott
02-04-2019 03:13 AM
02-04-2019 07:49 AM
02-04-2019 08:09 AM
02-04-2019 10:04 PM
You can upgrade directly to 3.8.X but only after upgrading the ROMmon.
Please refer to Upgrading the System Software which states:
If you are upgrading to Cisco IOS XE Release 3.8.xE and plan to use VSS, you must upgrade your ROMMON to IOS Version 15.0(1r)SG11.
02-04-2019 11:38 PM
Hello,
thank you very much. We have ROM: 15.0(1r)SG12. Therefore, we assume that this ROM version that is greater than 15.0(1r)SG11 is correct to do the upgrade process in a VSS enviroment. Anyway, we have opened a Cisco TAC ticket to make sured.
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