Dell Brocade 5100 Brocade Fabric OS v7.3.0a Release Notes v2.0 - Page 22

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 v7.3.0a. 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 v7.3.0a 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 v7.3.0a Migrating from FOS v7.2 Any 8G or 16G platform running any FOS v7.2.x firmware can be non-disruptively upgraded to FOS v7.3.0a. 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 v7.3.0a. Disruptive upgrade to FOS v7.3.0a from FOS v7.1 is supported. Fabric OS v7.3.0a Release Notes v2.0 Page 22 of 55