09-05-2019 06:41 AM - edited 07-05-2021 10:57 AM
I have to upgrade a 5520 WLC from 8.2.x to 8.5.x. The CIMC module is not used or connected so no remote CIMC access.
As usual the release notes are not very clear but quotes bug reference CSCvo33873 that states for 5520 and 8540 appliances "We recommend that you upgrade the CIMC utility to Version 3.0(4d) that has been certified to be used with these controllers." (release 4.0(2h) is now available).
The CSCvo33873 bug notes states that
So I am unclear if this is just an issue for those who manage the WLC (and upgrade) via CIMC or if it is a broader issues for those who would use the conventional WLC GUI route.
As part of my 5520 8.2x – 8.5x upgrade, is it necessary to first upgrade the CIMC software if it is not being used?
Solved! Go to Solution.
09-05-2019 11:49 AM
As part of my 5520 8.2x – 8.5x upgrade, is it necessary to first upgrade the CIMC software if it is not being used?
It is not mandatory to upgrade CIMC first. However due to those vulnerabilities, it is recommend to upgrade your CIMC to latest.
HTH
Rasika
*** Pls rate all useful responses ***
09-05-2019 11:49 AM
As part of my 5520 8.2x – 8.5x upgrade, is it necessary to first upgrade the CIMC software if it is not being used?
It is not mandatory to upgrade CIMC first. However due to those vulnerabilities, it is recommend to upgrade your CIMC to latest.
HTH
Rasika
*** Pls rate all useful responses ***
09-06-2019 12:47 AM
09-05-2019 10:43 PM
Your timing is perfect. I just unboxed two brand new 5520's and they came shipped from factory with CIMC 4(01)a and WLC code 8.3.140.0
My plan was to put both controllers on the gold star release (8.5.151.0) - the release notes were already confusing because they recommended an older version of CIMC. I suspect the documentation has not been updated. Ignore that old CIMC.
I upgraded both controllers to 8.5.151.0 while it was on the "old" CIMC code.
I then proceeded to upgrade both servers using the HUU (Host Update Utility) to version 4.(02)h
Everything went smoothly.
09-06-2019 12:48 AM
09-06-2019 02:01 AM
The CIMC upgrade will take between 60 to 70 minutes. During this time, the physical hardware will not be responsive. The "breakdown" of the CIMC upgrade are the following:
09-06-2019 05:57 AM
I upgraded one of my 8540 CIMC and took more than 1hr (Agree with what Leo has stated). Here is the steps if anyone wonders
https://mrncciew.com/2019/09/06/cimc-upgrade-8540-5520-wlc/
HTH
Rasika
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