Cisco 4500 Upgrade from 3.8 to 3.11 version using ISSU

[cristian.munoz]

Hi Guys

I have to upgrade a couple Cisco 4500 VSS, from 3.8 to 3.11 version. I need know is supported the ISSU?

TIA
Cristian

[marce1000]

 - FYI : https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/XE3-8-0E/15-24E/configuration/guide/xe-380-configuration/vss.html#40239

 M.

[cristian.munoz]

Thank you marce1000, but I need know if I can upgrade the version from 3.8 to 3.11 with ISSU . I can´t find information about of compatibility. 

TIA
Cristian

[balaji.bandi]

read the release notes :

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/release/note/ol-311xe-4500e.html

[Leo L]

This question gets asked every few months. 

It is not recommended to perform an upgrade with ISSU or FSU/eFSU because if it does not work, it will fail very spectacularly.  Another reason why ISSU or FSU/eFSU is not recommended is because ISSU or FSU/eFSU does not support ROMMON upgrade.  

IMPORTANT:  Read the Release Notes if the ROMMON needs to be upgraded or not.  When in doubt, always upgrade the ROMMON!

A good guide on how to upgrade the switch (in VSS), including ROMMON, can be found HERE.

[Mohsin Alam]

Here is the compatibility matrix:

https://community.cisco.com/t5/networking-documents/catalyst-4500-4900-series-issu-compatibility-matrix/ta-p/3899728

You cannot directly jump but can go via multiple jumps. 

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