Virtual method of multiple Ethernet controllers in embedded system

Abstract

The invention discloses a virtual method of multiple Ethernet controllers in an embedded system, comprising the following steps: a switch chip is set to a management mode, and all packets which come from an LAN port of the switch chip are forwarded to an IMP port; an IEEE802.1Q VLAN function of the switch chip is enabled, and a VLAN learning mode is set to a learning mode based on MAC and PVID; a unicast lookup failure forwarding mode of the switch chip is set as forwarding to the LAN port; as for a switch chip having N LAN ports, N IEEE802.1Q VLANs are divided inside the switch chip, and each LAN port and the IMP port are positioned at the same VLAN, wherein N is a natural number; and MAC addresses of ethernet controllers corresponding to the N LAN ports are added into a static address table of the switch chip. By the method, design complexity of an interface circuit between the Ethernet controllers and a CPU and hardware costs can be reduced, and Ethernet drive program design difficulty and time cost are minimized.

Description

technical field [0001] The invention relates to a method for virtualizing multiple Ethernet controllers using a single managed Ethernet switching chip in an embedded system. Background technique [0002] For embedded systems oriented to network applications, in order to increase network processing capabilities, the system is generally configured with multiple independent Ethernet controllers, and each Ethernet controller interacts through an independent driver program and protocol stack. This design scheme has deficiencies in both hardware and software, which are specifically reflected in: [0003] (1) In terms of hardware, the circuit interface between each Ethernet controller and CPU needs to be considered, the interface circuit is complex, and the hardware cost is high; [0004] (2) In terms of software, it is necessary to write a driver program for each Ethernet controller. If the models of these Ethernet controllers are the same, the driver program code can be reused. ...

AI Technical Summary

Problems solved by technology

[0003] (1) In terms of hardware, the circuit interface between each Ethernet controller and CPU needs to be considered, the interface circuit is complex, and the hardware cost is high;

[0004] (2) In terms of software, it is necessary to write a driver program for each Ethernet controller. If the models of these Ethernet controllers are the same, the driver program code can be reused. If the models are different, different drivers must be written, which increases the software cost. Design difficulty and time cost

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