Upd | Fabric Version 0431

# Check current running version
fabriccli show version
Expected output: Running: 0428, Inactive: 0431
The most straightforward part: UPD almost universally stands for Update or Update Package. In the context of fabric firmware, you will see:

Thus, "fabric version 0431 upd" likely refers to a specific firmware update package (version 0431) intended for a storage or network fabric component.
Check that multipathing (MPIO) is active on all connected hosts.
 fabric version 0431 upd

Cause: A critical RSCN (Registered State Change Notification) happened during the write to flash.
Fix: Do NOT reboot. Issue firmwareclean -v 0431 to abort, then firmwarerestore -v 0429 to fall back. Re-download the 0431.upd file from a trusted repository. # Check current running version fabriccli show version

After the system reboots and joins the fabric again:

fabriccli show version
# Must show "Running: 0431"
fabriccli show domain list
Monitor with:
firmwaredownloadstatus -v 0431