Network 802.1X Feature Descriptions - Aruba 501 Configuration And Administration Manual

Autonegotiation
Use this setting to enable or disable automatic port negotiation. It is enabled by default.
Link speed
With autonegotiation disabled, you can specify the particular link speed to be used. Supported speeds are 10
Mbps, 100 Mbps and 1000 Mbps.
Duplex mode
With autonegotiation disabled, you can specify the particular duplex mode to be used. Supported modes are Half
duplex and Full duplex with the exception of 1000 Mbps which can only be set to Full duplex.

Network 802.1X feature descriptions

The Aruba 501 features a built-in 802.1X authenticator for authenticating wired devices connected to the Ethernet
port. When enabled, a wired device will not be given access to the upstream AP network without first successfully
completing an 802.1X authentication exchange. The Aruba 501 relays the authentication frames to the configured
upstream RADIUS server.
Wired LAN 802.1X authenticator
40 Aruba 501 802.11ac Wireless Client Bridge Configuration and Administration Guide