WRS configured as GM does not become GM
Only v6.1 When the configuration of a WR switch is changed to GM via wrs_menuconfig, the WR switch refuses to become Grandmaster. It turns out that the configuration of ports is not properly updated to have all the ports configured as masters. If a WR switch was previously configured as BC (which means it has port 1 as slave), this switch will still have port 1 as slave. Such a configuration is not allowed for GM. This mis-configuration is detected, and the WR switch refuses the configuration silently.
SOLUTION: when changing to GM mode, make sure that all the ports are set to master (via external configuration) or master-only)