ExtremeCloud Appliance v4.76.01 supports Campus/Centralized sites only. During system upgrade to 4.76.01, the upgrade process checks for Distributed sites. If Distributed sites are part of the instance configuration, the upgrade process will abort and log the following:
<date> ERROR: Upgrade aborted due to the presence of a Distributed site
<date> ERROR: System upgrade failed
After the upgrade process aborts, the system is retained at its current revision. The configuration state is not affected. Support for Distributed sites will be re-introduced in ExtremeCloud Appliance v4.76.02. Upgrading from previous releases for installations with remote sites will be re-introduced with v4.76.02.