Marvell Asia Pte., Ltd.

Chuanhai Zhou

Hong Yu Chou

Dance Wu

Lian Xie

A network switch includes a plurality of ports for communicating over a network. Processing circuitry processes inbound frames received from the network via the ports and sends outbound frames to the network. Remote management circuitry (RMU) is responsive to commands received from a host device external to the network switch. The RMU receives via one of the ports a remote access request frame from the host device, wherein at least part of the remote access request frame is encrypted, and decrypts the remote access request frame. In response to successful decryption of the part of the remote access request frame, the RMU accesses one or more configuration registers of the network switch in accordance with the remote access request frame, composes a remote access response frame, at least a portion of the remote access response frame being encrypted, and sends the remote access response frame to the host device.

Trusted remote management unit

A first serial management interface device includes one or more input/output pins and a controller coupled to the one or more input/output pins. The controller receives a first frame from a second serial management interface device via a first input/output pin and generates a first error code based on the first frame received from the second serial management interface device. The controller receives a second frame from the second serial management interface device via a second input/output pin subsequent to receiving the first frame. The second frame includes a second error code. The controller compares the first error code to the second error code to determine whether first error code and the second error code match.

Serial management interface with improved reliability

A first serial management interface device includes an input/output pin, a register, and a controller. The controller is configured to send a first frame to a second serial management interface device via the input/output pin. The controller is configured to generate an error code based on the first frame sent to the second serial management interface device. The controller is configured to store the error code in the register to send to the second serial management interface device.

A serial management interface master device includes an input/output pin and a controller including an error code calculator. The controller is configured to output a first access frame on the input/output pin to cause data to be written to a first register of a serial management interface slave device connected to the input/output pin; cause the error code calculator to generate first error code bits based on the first access frame sent to the serial management interface slave device; and output a second access frame including the first error code bits to the serial management interface slave device on the input/output pin to cause the first error code bits to be written to a second register of the serial management interface slave device.

Growing community of inventors

Pudong New District, China

Chuanhai Zhou