Smart Rate ports are designed to link devices at 1 Gbps, 2.5 Gbps, 5 Gbps, and 10 Gbps. Older devices such as legacy printers can run at maximum speed of 100 Mbps. To address this issue, the speed duplex auto-100 enhancement is introduced on Smart-Rate ports. Depending on the device model, Smart Rate ports can operate on 100Mbps speed.

If MACsec is configured on a port, we cannot configure speed duplex as auto-100 for that particular port, and conversely.

100Mbps is supported on auto speed duplex mode by default.

100 Mbps support on Smart Rate ports is available for 5400R, 3810M and 2930M.