Network OS Administration Guide

Supporting Network OS 6.0.1a

Part Number: 53-1003768-04

Firmware downgrade and upgrade considerations for zoning

A firmware downgrade from Network OS 4.1.0 to Network OS 2.1.x is not permitted under the following conditions:

  1. One or more zone aliases are configured on the switch. You must remove all references to zone aliases prior to a firmware downgrade. Use the no zoning defined-configuration alias command to delete all zone alias objects. Then issue the zoning enabled-configuration cfg-action{cfg-save | cfg-disable} command or the zoning enabled-configuration cfg-name cfg_name command to commit the operation before re-attempting a firmware download.
  2. An open zone transaction in progress. You must either commit or abort the current open transaction before re-attempting a firmware download. Use the zoning enabled-configuration cfg-action {cfg-save | cfg-disable} command or the zoning enabled-configuration cfg-name cfg_name command to commit the current open transaction. Alternately, use the zoning enabled-configuration cfg-action cfg-transaction-abort command to abort the open transaction.

    You cannot downgrade any switch in a Brocade VCS Fabric to Network OS 2.0 or earlier if any zone definition exists in the defined configuration. Any attempt to do so will fail while attempting to download the earlier firmware. For the downgrade to succeed, you must clear the defined configuration, disable any active configuration, set the default zoning mode to All Access, and then try again to download the firmware.

    When you upgrade from Network OS 2.1.0 to versions 2.1.1 or later, the zone database is cleared.

    Note Icon
    CAUTION
    Clearing the defined configuration clears the zoning database for the entire fabric. If you want to downgrade just one switch without affecting the rest of the fabric, disconnect the switch from the fabric before deleting the defined configuration.