To identify a newer hardware component, execute
show chassis CLI and verify Factory Part Num. If the last 2 digits are 11 or higher, it is running with the affected hardware component as below.
sw0# show chassis
…
Factory Part Num: 40-1001012-11
VDX6940-36Q and VDX 6940-24Q with a newer hardware component will ship with a compatible NOS version from manufacturing and firmware downgrade and upgrade cases have been handled as below:
1. Firmware download to a NOS version without the uboot changes [Ex: NOS7.0.1c] will NOT be supported and will be blocked:
sw0# firmware download [default-config] scp user <UN> password <PW> host 10.10.10.10 directory <ImageDir>/nos7.0.1c
Performing system sanity check...
A newer hardware component has been detected, thus firmware download is blocked
to avoid degrading the system performance of the VDX 6940-36Q platform.
The preinstall script failed.
sw0#
2. Firmware download to a NOS version with the uboot changes [Ex: NOS7.2.0b] will be supported.
sw0# firmware download [default-config] scp user <UN> password <PW> host 10.10.10.10 directory <ImgaeDir>/nos7.2.0b/
Performing system sanity check...
This command will cause a cold/disruptive reboot and will require that
existing telnet, secure telnet or SSH sessions be restarted.
© 2016 Brocade Communications Systems, Inc. All Rights Reserved. TSB 2017-260-A 3 of 3
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3. Firmware Upgrade/Downgrade when a cluster has a variety of products including affected products with a newer hardware component.
If planning to perform a cluster wide firmware download operation, then it would be best to identify the vulnerability with this issue on any affected product by verifying the “Factory Part Num” as mentioned above prior to the upgrade. This is to ensure avoiding a partial cluster upgrade with the other half blocked on older releases due to other nodes in the cluster failing upgrade due to the presence of the issue on any single applicable node. If any node has the newer component, we recommend upgrading the entire cluster to one of the NOS releases with the uboot changes.