5.N-Ring copper ports must be run at 100Mb full duplex, including the default ‘autonegotiate’ as long as all switches in the ring support 100Mb full duplex.
The “N-Ring Mode” is one of three, as below:
If N-Ring Mode is “Manager”, then a pulldown allows selection as available of ports P11 and P12, or GB1 and GB2 as N-Ring ports.