CN103019368B - A kind of method that local I/O node switches with KVM module intelligence - Google Patents

Abstract

The invention provides a method for intelligent switching between a local IO node and a KVM module, which belongs to computer technology and includes a KVM module and several IO nodes connected to each other through a backplane. The KVM module is provided with a SWITCH chip, and the SWITCH chip is connected with A system management board, each of the IO nodes is provided with a micro switch and a VGA-SWITCH chip. On the KVM module, through the SWITCH chip, under the control of the system management board, by controlling the conduction of different channels of the SWITCH chip, Complete the multi-channel signal switching work. Compared with the prior art, this method of intelligent switching between local IO nodes and KVM modules can complete K/V/M multi-cutting work through the KVM module, and multiple node servers can be controlled with a set of keyboards, mice, and monitors. Control, and achieve local and remote dual redundancy, improve system reliability.

Description

A method for intelligent switching between local IO nodes and KVM modules

technical field

The invention relates to the technical field of computers, in particular to a method for intelligent switching between a local IO node and a KVM module.

Background technique

Today, the CPCI architecture is widely used in industrial control computer systems in the industrial field, and it has the advantages of high reliability and high density. Applying to the server field will give full play to its advantages. The solid structure, high reliability, and hot-swappable technology make the application field of CPCI server more and more extensive. For a multi-node CPCI server, if each server node is connected with an external mouse, keyboard, and monitor. Multiple sets of IO peripherals are required. Greatly increase the cost, which is not conducive to system simplification and cost reduction. And use the KVM module to realize one-to-many control. Then the cost can be reduced, and one-to-many unified management can be realized. Under some conditions, it is necessary to perform debugging, debug or local control operations on a computing node alone. Need to add local peripherals to operate. Therefore, there is a need for a method to realize intelligent switching between local IO and KVM video, which can be used for both local operation and remote KVM operation. In this way, the server peripherals are simplified, the cost is reduced, and the cost performance and high density of the product are improved.

Contents of the invention

The technical task of the present invention is to solve the deficiencies of the prior art, and provide a method for intelligent switching between local IO nodes and KVM modules.

The technical solution of the present invention is realized in the following manner, the method for intelligently switching between a local IO node and a KVM module includes a KVM module and several IO nodes connected to each other through a backplane, and the KVM module is provided with a SWITCH chip , the SWITCH chip is connected with a system management board, and each IO node is provided with a micro switch and a VGA-SWITCH chip. On the KVM module, through the SWITCH chip, under the control of the system management board, through the control of the SWITCH chip The conduction of different channels completes the multi-channel signal switching work. The specific switching steps are: when a display is connected to the IO node, touch the micro switch to make the switch closed, and the switching control pin of the VGA-SWITCH chip is pulled down. At this time The VGA signal is switched to the IO node, and the output is displayed on the local display; when there is no local display connected, the switching control signal pin will be automatically pulled high, and the data will be switched to the KVM module.

The beneficial effect that the present invention produces compared with prior art is:

In the method for intelligently switching between a local IO node and a KVM module of the present invention, the system can intelligently complete the video switching between the local IO node and the KVM module; both single-node local display and K/V/M can be completed through the KVM module Multi-cutting one job, using a set of keyboards, mice, and monitors to control multiple node servers, and realize local and remote dual redundancy to improve system reliability. This invention is applied to CPCI architecture servers. It can be used in the early stage of research and development, debugging, and in the product, effectively reducing the system cost, improving the stability of the system, and increasing the market competitiveness of the product.

Description of drawings

Accompanying drawing 1 is the equivalent circuit diagram of the present invention.

Accompanying drawing 2 is the switching diagram of the present invention.

detailed description

A method for intelligent switching between a local IO node and a KVM module of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in accompanying drawing 1, Fig. 2, now provide a kind of method of local IO node and KVM module intelligent switching, comprise a KVM module and several IO nodes connected to each other through the backplane, the SWITCH chip is arranged on the described KVM module, The SWITCH chip is connected with a system management board. In the present invention, in order to complete the switch between the local display of the IO node and the remote display of the KVM module, a microswitch and a VGA-SWITCH chip are added to each computing node.

The specific switching steps are shown in Figure 1: When a display is connected to the IO node, the micro switch is touched to close the switch, and the switching control pin (SW) of the VGA-SWITCH chip is pulled down. At this time, the VGA signal (RGB, H/V) switches to the IO node to display the output from the local display. When there is no display connected locally, the switching control signal SW will be automatically pulled high, and the data will be switched to the KVM module. Under the control of the SMC, the multi-cutting work will be completed through the switch chip.

When the data (VGA, USB) of multiple computing nodes is connected to the KVM module through the backplane. On the KVM module, through the SWITCH chip, under the control of the system management board (SMC), the multi-channel signal switching is completed by controlling the conduction of different channels of the SWITCH chip. The switching of USB signal is realized by SWITCH chip (such as MAX4999E), the switching of H/V signal is realized by SWITCH (such as DG407), and the switching of RGB signal is realized by SWITCH (such as ISL59482). And after the VGA (RGB, H/V) signal is switched, add VGABuffer to increase the data driving capability, provide signal quality, and ensure signal integrity.

In this way, the intelligent switching between local IO and KVM video of the CPCI architecture server is completed.

Claims (1)

1. the method that a local I/O node switches with KVM module intelligence, it is characterized in that including by the interconnective KVM module of backboard and some I/O node, described KVM module is provided with SWITCH chip, this SWITCH chip is connected to system management unit, described each I/O node is both provided with microswitch, VGA-SWITCH chip, in KVM module, by SWITCH chip,System management unitControl under, by control SWITCH chip difference passage conducting,Complete multiple signals switch operating,Local I/O node concretely comprises the following steps with the switching of KVM module intelligence: whenOneWhen I/O node having display access, touchOn this I/O nodeMicroswitch makes switch Guan Bi, and the switching control pin of VGA-SWITCH chip drags down, and at this moment VGA signal is switched toShouldOn I/O node, local display, show output；When this locality does not have display to access, switch-over control signal pin can draw high automatically, on data exchange to KVM module.