Here is the info I have:
Upgrading to BCM Rls 6.0
Any previous version of the BCM50 can be upgraded to BCM Rls 6.0. However,
BCM50 Rls 1.0 systems should first be upgraded to BCM Rls 3.0 before performing the 6.0 upgrade.
Upgrading directly from BCM Rls 2.0, 3.0 and 5.0 to BCM Rls 6.0 is supported.
Upgrading from BCM50 Rls 2.0 to Rls. 6.0
Create a Backup of the Rls 2.0 software: refer to the Backup & Restore Guide.
Obtain a Keycode file with the Rls 6.0 upgrade entitlement, and also the Rls 6.0 Upgrade File and Factory Image: refer to the Pre-Upgrade Activities section of this guide.
Ensure the Time Zone is not set to Factory Default: refer to the Checking the Time Zone is Set Correctly section of this guide.
Ensure the DHCP Setting is not set to Enabled-Automatic: refer to the Checking the DHCP Server Setting section of this guide.
Apply the Keycode File containing the Rls 6.0 upgrade entitlement: refer to the Applying the Keycode File section of this guide.
Perform the Rls 2.0 to Rls 6.0 upgrade: refer to the Performing the Upgrade section of this guide.
Apply the Rls 6.0 Factory Image: refer to the Applying the Factory Image section of this guide
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