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08-29-2017 12:01 PM - edited 03-08-2019 11:52 AM
Solved! Go to Solution.
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08-29-2017 02:46 PM
Most of the time for routers and switches, it is fine to go straight.
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08-29-2017 12:27 PM
Hello,
You can refer to the following as an example: https://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios-software-releases-12-4-mainline/prod_white_paper0900aecd805079fb.html
Only upgrade path I'm aware of for Cisco IOS is 12.4 to Release 15.0(1) or later releases.
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08-29-2017 12:47 PM
Just so I am stating this clearly, I am already at 15.1(2)SY2 and the plan is to upgrade to 15.1(2)SY11. Pretty sure I can do this directly and just looking for confirmation.
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08-29-2017 01:00 PM
Yes, I'm am pretty sure as well. Just in case, I've reviewed the release notes: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-1SY/release_notes.html and I couldn't find anything that would prevent you from jumping to 15.1(2)SY11.
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08-29-2017 01:02 PM
It should not be an issue to go directly to 15.1(2)SY11.
HTH
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08-29-2017 02:46 PM
Most of the time for routers and switches, it is fine to go straight.
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08-30-2017 05:25 AM
As he also notes, you rarely encounter this, but when you do, if often is due to syntax changes in the configs and/or firmware updates.
Also, the release notes might note special issues if you try to downgrade. When such are not noted, you can still run into issues with syntax changes. (I.e. if you want to be able to back out an IOS upgrade, good idea to save a copy of the config that was actually being used by the original IOS version.)
