CN100382521C - Method for supporting photoelectric multiplexing of multi-gigabit Ethernet ports - Google Patents

Abstract

The invention discloses a method for supporting multi-gigabit Ethernet port photoelectric multiplexing. The method includes the following steps: a) using a physical layer specific-purpose integrated circuit with functions of line diagnosis and port multiplexing, providing a link for each user link Set a user port corresponding to a gigabit electrical interface and a user port corresponding to a gigabit optical interface at the same time; b) determine the currently effective user port according to the real-time detection signal of the current link status of the two user ports, and set the determined The effective user port is the enabling port, and the enabling port is used to transmit the data information of the current user link. The method of the invention can flexibly realize the switch between the photoelectric interfaces of the same user link on the basis that the ports of the Ethernet equipment simultaneously support the physical layer media of the electrical interface and the optical interface.

Description

Method for supporting photoelectric multiplexing of multi-gigabit Ethernet ports

technical field

The invention relates to a port multiplexing technology, in particular to a method for realizing multiplexing of optical ports and electrical ports in multi-gigabit Ethernet port equipment.

Background technique

With the explosive growth of Internet Protocol (IP) services and the increasing opening of the telecom operation market, both traditional telecom operators and emerging operators have chosen Ethernet technology, using Ethernet switches as broadband residential quarters and commercial buildings. The user accesses the device. With the increasing demand of users for service bandwidth and the realization of 10 Gigabit Ethernet standardization, the demand for Gigabit Ethernet ports has gradually increased, especially the Gigabit Ethernet electrical interface has been directly used as a user interface.

On a traditional Gigabit port switch device, each Gigabit port on the switch is either used for Gigabit electrical interface connection or Gigabit optical interface connection, and the optical interface and electrical interface correspond to the link layer interface one by one. of. That is to say, in traditional Gigabit Ethernet equipment, the optical interface is predetermined and fixed.

With the continuous development of application-specific integrated circuits (ASICs), a PORT Plus (PORT+) technology is proposed, which uses the support of ASICs for the multiplexing of optical and electrical interfaces, and realizes the optical and electrical interfaces of multiple ports in multi-gigabit port switches. Multiplexing, specifically: on a switch, one or more Gigabit links support the physical layer media of 1000Base-T user ports and 1000Base-X user ports at the same time, and can be used according to the connection conditions of the links Automatically configure the currently valid physical port type. Here, the ports supporting 1000Base-T are Gigabit Interface Converter (GBIC, Gigabit Interface Converter) electrical interfaces, and the ports supporting 1000Base-X are Small Form_Factor Pluggable (SFP, SmallForm_Factor Pluggable) optical interfaces. This multiplexing technology can maximize It satisfies the user's requirements for the connection of different physical layer media on the same Ethernet interface to a certain extent.

At present, Ethernet switches that can implement PORT+ technology support Gigabit electrical interfaces by using GBIC electrical interface (1000Base-T) modules; or use SFP optical interface (1000Base-X) The application of the optical interface on the port. However, in practical applications, although the same port of the Ethernet device can support the optical interface at the same time, it cannot support the simultaneous use of the optical interface, that is, the same port of the Ethernet device supports the insertion of optical interface modules or electrical interface modules, but the same Only one interface module can be inserted at any time. Then, when realizing the photoelectric conversion, it is also necessary to replace the interface module, or complete the photoelectric adaptation of the Ethernet user interface through an external photoelectric conversion device. In the prior art, whether using GBIC, SFP interface modules, or using external photoelectric conversion equipment, the price is relatively expensive, thus increasing the cost of network establishment and maintenance; In this way, the user link will be interrupted, resulting in communication failure and degradation of service quality.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for supporting multi-gigabit Ethernet port photoelectric multiplexing, which can flexibly realize the same user's Link switching between optical and optical interfaces.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for supporting photoelectric multiplexing of multi-gigabit Ethernet ports, the method includes the following steps:

a. Use a physical layer application-specific integrated circuit with line diagnosis and port multiplexing functions, and set a user port corresponding to a Gigabit electrical interface and a user port corresponding to a Gigabit optical interface for each user link at the same time;

b. According to the real-time detection signal of the current link status of the two user ports, it is judged whether the currently used user port remains valid, and if so, then it is determined that the currently used port is an effective user port; the user port used, and determine that the switched user port is an effective user port;

c. Set the determined valid user port as an enabled port, and use the enabled port to transmit data information of the current user link.

The step b further includes: when the system is initialized, it is determined that the currently valid user port is the valid user port.

In the above solution, the user port corresponding to the electrical interface is an RJ45 port. The user port corresponding to the optical interface is a GBIC port or an SFP port.

Therefore, the method for supporting multi-gigabit Ethernet port photoelectric multiplexing provided by the present invention sets two available physical interfaces for the same user link at the same time, and determines the current enabled port according to the real-time detection of the port status. In this way, the maximum flexibility is provided for users to use multi-gigabit Ethernet devices, and the expensive cost of using traditional technologies is reduced, and the impact on services due to link interruption due to switching tests in traditional technologies is avoided.

Description of drawings

Fig. 1 is a schematic diagram of an embodiment of the composition structure of an Ethernet device for realizing the method of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The core idea of the present invention is: for each user link, provide two physical user interfaces at the same time: a user port corresponding to the electrical interface, and a user port corresponding to the optical interface; then, monitor the current lines of the two user ports in real time state, to determine the port where the current signal is valid, and then enable the user port or switch the optical interface.

Carrying out photoelectric multiplexing with the port of a Gigabit Ethernet user link is example, adopt the physical layer application-specific integrated circuit (PHY ASIC) that has line diagnosis and port multiplexing function in the present embodiment, the method of the present invention is to realize like this of:

First of all, as shown in Figure 1, on a multi-gigabit Ethernet device, since the PHYASIC 12 supports both 1000BASE-T and 1000BASE-X interfaces, two interfaces corresponding to the optical interface and the electrical interface are set externally at the same time. User ports, users can use different port media by directly connecting network cables or optical fibers, one of these two user ports is used as a common port (port), and the other is used as a port supporting multiplexing functions, which can be identified by port+(port plus) . In the present embodiment, the RJ45 port 10 is used as the user port supporting the 1000BASE-T electrical interface, and the GBIC port 11 is used as the user port supporting the 1000BASE-X optical interface, and the RJ45 port 10 is set as port in the present embodiment, and the GBIC port 11 for port+. The RJ45 port 10 and the GBIC port 11 are simultaneously connected to the PHY ASIC 12, and input the TX/RX signal and real-time detection signal (signal detect) into the PHY ASIC 12, wherein the detection signal of the RJ45 port is included in the TX/RX signal . Afterwards, utilize the line diagnosis function of this PHY ASIC 12 to monitor the current line state of RJ45 port 10 and GBIC port 11 in real time, when which port signal is valid first, just enable this port, and guarantee that this first valid port is not affected by the latter valid port. Influence; if the two ports are valid at the same time, for example, when the system is powered on, the two ports are plugged with cables and optical fibers at the same time. Since the port signal detection method is usually round robin, the signal of a certain port will always be detected first. At the same time, the port whose detection signal is valid first is also enabled. Of course, in practical applications, the set user port corresponding to the optical interface may also adopt other gigabit optical interface forms, such as SFP and so on.

Based on the above-mentioned structure and the function of PHY ASIC, the process that the present invention realizes optoelectronic interface multiplexing and switching comprises the following steps:

1) When the system is initialized, through the real-time monitoring of the current detection signals of the optical interface and the electrical interface, it is determined which port signal is valid first, and then the port is enabled, and the enabled port is used to transmit data information of the current user link .

In this way, in this embodiment, if only the RJ45 port or the GBIC port is connected, each single user port can be used normally. If the cable and optical fiber are plugged into the RJ45 port and the GBIC port at the same time, then, when the system is initialized, both ports have normal detection signals. If the effective detection signal of the RJ45 port is detected first, the RJ45 port is enabled. The road uses the connected RJ45 port to transmit data information.

2) During the application process, the PHY ASIC 12 judges whether the currently used port remains valid by monitoring the current detection signals of the optical interface and the electrical interface in real time, and if so, continues to use the current port to transmit the data information of the current user link; Otherwise, automatically switch the currently used user port to another user port, enable the switched user port, and then use the switched user port to transmit data information of the current user link.

For example: the current RJ45 port is used for communication, if the RJ45 port is disconnected, such as unplugging the cable, the system will automatically switch the currently used port to the user port connected to the GBIC optical fiber; when the RJ45 port is restored, due to the current The used GBIC port remains valid, so user links continue to use the GBIC port.

Similarly, if only the RJ45 port is currently connected, and the port works normally; then, even if the corresponding module and optical fiber are newly installed on the GBIC port, since the currently used RJ45 port remains valid, the user link continues to use the RJ45 port. If only the optical fiber of the GBIC port is currently connected, and the port works normally; then, even if a corresponding cable is newly installed on the RJ45 port, since the currently used GBIC port remains valid, the user link continues to use the GBIC port.

In the above application process, setting the current enabled port and controlling port switching are all realized by setting and reading the state of the internal register of the PHY ASIC.

In practical applications, it can also be realized by setting the state of the register: switching between the two user ports at any time according to the needs of the user. The above-mentioned automatic switching can also be realized by setting the priority of the two ports. For example, if the priority of the optical port is set higher than that of the electrical port, then when the electrical interface is used, if the optical interface is installed, the detection After that, it can switch automatically.

In a word, the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (4)

1. a method of supporting many gigabit ethernet ports photoelectric multiplexing is characterized in that this method comprises the steps;

A. adopt physical layer application-specific IC, for every user link is provided with the user port of a corresponding gigabit electrical interface and the user port of a corresponding gigabit optical interface simultaneously with line diagnosis and multiplexed port function;

B. according to real time detection signal, judge whether currently used user port remains valid, if determine that then currently used port is the validated user port to two current Link States of user port; Otherwise another user port that automaticallyes switch is currently used user port, and determines that the user port after this switching is the validated user port;

C., it is the enable port that determined validated user port is set, and transmits the data message of active user's link with this enable port.

2. method according to claim 1 is characterized in that, described step b further comprises: when system initialization, determine that the effective user port of current elder generation is the validated user port.

3. method according to claim 1 is characterized in that: the user port of described corresponding electrical interface is the RJ45 port.

4. method according to claim 1 is characterized in that: the user port of described corresponding optical interface is gigabit interface modular converter gbic port or is miniature pluggable module SFP port.