5900AF-48XG-4QSFP IRF upgrade ISSU not compatible

[Erik91]

I have two 5900AF-48XG-4QSFP switches in IRF running 7.1.045, Release 2422P01.

I want to upgrade in 7.1.045, Release 2432P06 without complete downtime. I mean upgrade one switch and the second one just after so server with dual connection will continue to have network.

ISSU can not be use as compatibility matrix not OK. I wonder if there is a way to manually upgrade / reboot one switch and once first switch upgraded upgrade / reboot the second one so at any time at least one switch is up and running.

Any tips ? Any advice ?

[Ivan_B]

Hi @Erik91 !

Please, check the following document, I think one of the examples listed there is what you are looking for - https://higherlogicdownload.s3.amazonaws.com/HPE/MigratedAttachments/605B9B5B-CA69-431D-A8F6-B53A287B6A9A-1-HPE%2059xx%20FlexFabric%20ISSU%20VRD.pdf , section "ToR compatible reboot upgrade/incompatible upgrade process overview"

[Erik91]

Hi Ivan_B,

Thanks for your answer , it is helpfull.

Now I understand that my main concern is that I have IRF configured without MAD and MAD is mandatory to do such kind of upgrade to avoid the split brain.  Am I right ?

[Ivan_B · Accepted solution]

Yes, BFD MAD is an essential part of IRF setup. It is the protection mechanism that will prevent split-brain scenario during the upgrade.