In the case of a redundant port, there is only one port actively carrying traffic thus the only time a port coming up can affect existing traffic is where the primary port went down, traffic moved to a secondary and then the primary came back up. In this case since there is only one port the impact of switching ports is more noticeable and thus it may be desirable to not switch back to the original primary just because it is up. Instead traffic should only switch back if the currently active secondary fails.

To support that, the command set priority-override has been added for redundant interfaces. If priority-override is enabled, then when a port with a higher priority comes up then traffic switches to it. With priority-override disabled, traffic will only switch to a higher priority port if the current port fails.