Patent ID: 7742423

Claim:
An interface operational mode detection method, comprising: obtaining traffic data for an interface at a network manager of a network system; calculating a first bandwidth utilization value for the interface based on the obtained traffic data and a half-duplex operating mode, wherein the first bandwidth utilization is: Utilization = ( Δ ⁢ ⁢ ifInOctets + Δ ⁢ ⁢ ifOutOctets ) × 8 × 100 ( Δ ⁢ ⁢ t ) × ifSpeed , wherein Δt is a time period, ΔifInOctets is the number of Octets the interface received during Δt, ΔifOutOctets is the number of Octets the interface transmitted during Δt, and ifSpeed is the transmission speed of the interface; if the calculated first bandwidth utilization value is greater than one hundred percent (100%), determining the interface is a full-duplex interface; else, if the calculated first bandwidth utilization value is greater than a first threshold and if a collision count is less than a second value, determining the interface is a full-duplex interface; else determining the interface is a half-duplex interface; and managing the interface with the network manager based on the determination.