Release Notes

Fabric OS v7.3.0c Release Notes v1.0 Page 22 of 52
FOS Migration Considerations
This section contains important details to consider before migrating to or from this FOS release.
FOS Upgrade and Downgrade Special Considerations
DCX/DCX-4S units running any FOS v7.2.x can be non-disruptively upgraded to FOS v7.3.0c. This upgrade is
non-disruptive to both FC and FCoE traffic (when using FCOE10-24 blades).
Any firmware activation on Brocade 7800, or DCX, DCX-4S, DCX 8510-8, DCX 8510-4 with FX8-24 will
disrupt I/O traffic on the FCIP links.
Disruptive
upgrades to Fabric OS v7.3.0c are allowed and supported from FOS v7.1.x (up to a two-level
migration) using the optional “-s” parameter with the firmwaredownload command.
If there are multiple node EGs (encryption groups) in a fabric, please complete firmwaredownload on one node
at a time before downloading on another node.
Recommended Migration Paths to FOS v7.3.0c
Migrating from FOS v7.2
Any 8G or 16G platform running any FOS v7.2.x firmware can be non-disruptively upgraded to FOS v7.3.0c.
Migrating from FOS v7.1
Any 8G or 16G platform operating at FOS v7.1.x must be upgraded to FOS v7.2.x before non-disruptively
upgrading to FOS v7.3.0c.
Disruptive upgrade to FOS v7.3.0c from FOS v7.1 is supported.