BI-DIRECTIONAL ENCRYPTION/DECRYPTION DEVICE FOR UNDERLAY AND OVERLAY OPERATIONS

Technologies for bi-directional encryption and decryption for underlay and overlay operations are described. One network device a path-selection circuit that operates in a first mode or a second mode. In the first mode, the path-selection circuit receives a first incoming packet on a first port, sends it to a security circuitry to decrypt the first incoming packet to obtain a first decrypted packet, sends the first decrypted packet to a processing circuitry to process the first decrypted packet to obtain a first outgoing packet, and sends the first outgoing packet to a second port of the network device. In the second mode, the path-selection circuit receives a second incoming packet on a third port, sends it to the processing circuitry to de-encapsulate the second incoming packet to obtain a second outgoing packet, and sends the second outgoing packet to a fourth port of the network device.