CN110213168A - A kind of FC turns the data conversion flow control methods and device of Ethernet - Google Patents
A kind of FC turns the data conversion flow control methods and device of Ethernet Download PDFInfo
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- CN110213168A CN110213168A CN201810167956.9A CN201810167956A CN110213168A CN 110213168 A CN110213168 A CN 110213168A CN 201810167956 A CN201810167956 A CN 201810167956A CN 110213168 A CN110213168 A CN 110213168A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
- H04L43/0882—Utilisation of link capacity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
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- Computer Networks & Wireless Communication (AREA)
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- Environmental & Geological Engineering (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention relates to data conversion flow control methods and device that a kind of FC turns Ethernet, this method detects the data traffic of Ethernet when FC data and Ethernet data are converted；The data traffic of Ethernet is compared with the data traffic upper limit value of setting: when the data traffic for judging Ethernet is greater than the data traffic upper limit value of setting, control triggering FC back-pressure data.The present invention does not use the mechanism of traditional triggering FC back-pressure data, when FC data and Ethernet data are converted, by the data traffic of original detection FC, it is changed to the data traffic of active detecting Ethernet, when the data traffic for detecting Ethernet is excessive, FC back-pressure data is just triggered.That is, triggering FC back-pressure data in advance, and then the case where generating loss of data in big flow appearance is avoided, guarantees FC data and Ethernet data converting transmission not packet loss, the reliability of improve data transfer.
Description
Technical field
The invention belongs to optical fiber transmission technique fields, and in particular to a kind of FC turns the data conversion flow control side of Ethernet
Method and device.
Background technique
FC-AE is a kind of novel Fibre Channel technologies, with high broadband, low delay, high reliability, high anti-interference ability
Feature is widely used in fields such as aerospaces.The FC network for meeting FC-AE-ASM agreement has been applied to aviation field
Multiple Type product on, the interconnection between Generation of Airborne subsystem provide communication support.
During overall system design, when using FC network as core network, it is contemplated that each function of subsystem internal
Can the factors dictates such as communicating requirement, valid data amount, existing equipment compatibility and technical maturity between module, can select with
Too net is used as the local bus of subsystem internal.Meanwhile FC itself has had back-pressure data mechanism, in the data traffic of FC
When reaching the upper limit of FC data bandwidth can trigger data back-pressure, in order to avoid data traffic is excessive and the phenomenon that cause data packetloss.
But FC bus bandwidth includes 2.125Gbps, 4.25Gbps and 8.5Gbps, the Ethernet band with gigabit Ethernet
Width is compared, and FC bus bandwidth is much bigger.When subsystem is interconnected and communicated with FC core network, FC data are sent out to network interface
When the number of delivering letters, when FC data traffic and when reaching the upper limit of FC data bandwidth, will not trigger data back-pressure, still, the data flow
Amount may already exceed the bandwidth upper limit of gigabit Ethernet processing.At this point, being greatly likely to occur due to Ethernet data bandwidth not
Foot and the phenomenon that packet loss so that the very high FC network of reliability becomes unreliable.
Summary of the invention
The purpose of the present invention is to provide data conversion flow control methods and device that a kind of FC turns Ethernet, to solve
There is the problem of loss of data when certainly FC data and Ethernet data are converted in the prior art.
In order to solve the above technical problems, the technical solution of the present invention is as follows:
The present invention provides the data conversion flow control methods that a kind of FC turns Ethernet, include the following steps:
When the port FC and ethernet port carry out data conversion, the data traffic of ethernet port is detected；
The data traffic of ethernet port is compared with the data traffic upper limit value of setting:
When the data traffic for judging ethernet port is greater than the data traffic upper limit value of setting, control triggering FC data are anti-
Pressure makes the port FC stop receiving data.
Further, the data flow of ethernet port is detected by the ethernet frame number of detection ethernet port caching
Amount.
Further, when the data traffic for judging ethernet port is less than or equal to the data traffic upper limit value of setting, FC
Restore to the state for receiving data port.
Further, the data traffic upper limit value is fixed, or is configured by exterior arrangement interface.
The present invention also provides the data conversion volume control device that a kind of FC turns Ethernet, including processor, memory,
Interface chip, the processor realize following method for executing instruction:
When the port FC and ethernet port carry out data conversion, the data traffic of ethernet port is detected；
The data traffic of ethernet port is compared with the data traffic upper limit value of setting:
When the data traffic for judging ethernet port is greater than the data traffic upper limit value of setting, control triggering FC data are anti-
Pressure makes the port FC stop receiving data.
Further, the data flow of ethernet port is detected by the ethernet frame number of detection ethernet port caching
Amount.
Further, when the data traffic for judging ethernet port is less than or equal to the data traffic upper limit value of setting, FC
Restore to the state for receiving data port.
Further, the data traffic upper limit value is fixed, or is configured by exterior arrangement interface.
Beneficial effects of the present invention:
FC of the invention turns the data conversion flow control methods of Ethernet, and traditional triggering FC data are no longer used alone
The mechanism of back-pressure, by the data traffic of the original detection port FC, changes when the port FC and ethernet port carry out data conversion
FC number is just triggered when the data traffic for detecting ethernet port is excessive for the data traffic of active detecting ethernet port
According to back-pressure, so that the port FC stops receiving data.That is, triggering FC back-pressure data in advance, and then avoids and flowing greatly
The case where loss of data is generated when amount occurs, and guarantees FC data and Ethernet data transmission, conversion not packet loss, improve data transfer
Reliability.
FC of the invention turns the data conversion volume control device of Ethernet, turns Ethernet for realizing FC of the invention
Data conversion flow control methods, the device can be realized the data conversion of the port FC and ethernet port, and can guarantee FC number
According to transmitting with Ethernet data, converting not packet loss, the reliability of data transmission is improved.
Detailed description of the invention
Fig. 1 is data conversion device schematic diagram；
Fig. 2 is FPGA functional block diagram；
Fig. 3 is Ethernet data processing module functional block diagram；
Fig. 4 is data conversion module functional block diagram.
Specific embodiment
In order to realize that FC of the invention turns the data conversion flow control methods of Ethernet, a data converting means is now designed
It sets.
As shown in Figure 1, the device includes fpga chip, optical module, power conversion chip and Ethernet data processing chip.
Two-way ethernet signal can be converted into standard FC signal and carry out point-to-point transmission or passed by FC interchanger by the device
It is defeated.
FPGA be conversion equipment kernel processor chip, for realizing between Ethernet data and FC data protocol conversion,
The functions such as state reporting.Here using Xilinx Kintex7xc7k325t-ffg676 chip.
Ethernet data processing chip is interacted by gmii interface with FPGA for sending and receiving signals.Here it uses
It is the 88E1111 of Marvell.
The device further includes serial port module and indicator light mould.The device can be configured by serial ports, can also pass through serial ports
The some status informations of itself are reported.Indicating lamp module can the current conversion equipment of real-time display working condition.
FC is transmitted by the way of the hot redundancy of two-way when transmitting, moreover, the reliable transmission in order to guarantee link data,
FC data guarantee port data flow in the reasonable scope using credit value Backpressure, avoid data packet since bandwidth is insufficient and
It loses.
In order to realize the conversion between Ethernet data and FC data, as shown in Fig. 2, fpga chip includes Ethernet data
It caches monitoring module, FC credit back-pressure control module, FC data processing module, data conversion module, Ethernet data and caches mould
Block (including two Ethernet data cache modules in Fig. 2) and Ethernet data processing module (include two ether netting indexs in Fig. 2
According to processing module).
Generally, monitoring module is cached by Ethernet data the status information of Ethernet caching is detected and stored
(i.e. the data traffic of ethernet port), and can in real time by the status information of each caching in the data traffic of corresponding setting
Limit value is made comparisons, anti-by FC credit when the data traffic for judging ethernet port is greater than the data traffic upper limit value of setting
Control module is pressed to trigger FC back-pressure data, to realize that the port FC stops receiving data.This method is not to reach FC data band
FC back-pressure data is triggered when the wide upper limit, but when the data traffic of Ethernet is larger, it just controls FC and no longer receives data, prevent
The phenomenon that only occurring the phenomenon that data packetloss, data packetloss is prevented from source generation improves the reliability of data transmission.
Detailed introduction and explanation are done to each module designed in FPGA below.In addition, it should be noted that, here each
A module is software module, rather than actual hardware configuration.
1, Ethernet data caches monitoring module
The state collection that the module can cache all Ethernets, the i.e. data traffic of Ethernet, can specifically lead to
Ethernet frame number is crossed to show；And the state of each caching can be compared with the data traffic upper limit value of corresponding setting in real time
Compared with.In order to clearly show these information, a buffer status table is maintain in the module, stores each slow of collection
The state deposited and respectively cache comparison result.The table can be as shown in table 1.
Table 1
If the data storage capacity of some caching is more than the data traffic upper limit value of the corresponding setting of the storage, by the caching
Corresponding status information is set to height, and notifies FC credit back-pressure control module.
2, FC credit back-pressure control module
FC credit back-pressure control module, which can monitor in real time, respectively caches corresponding shape in Ethernet caching monitoring module
State information controls the credit value of the port FC according to the status information.
If detecting, the status information of Ethernet caching is height, i.e., when the caching is more than the data traffic upper limit value of setting,
It then controls present port and does not retransmit rdy signal, the port FC stops the reception of data；If detecting the state letter of Ethernet caching
It is low for ceasing, i.e., when the caching is no longer than the data traffic upper limit value set, the rdy signal of present port is restored to normal to send out
It send, data can be normally received.
3, Ethernet data processing module
As shown in figure 3, the module includes receiving end cache module, receiving frame statistical module, MAC Address extraction module, hair
Sending end cache module and transmission frame statistical module.
Receiving end cache module will be stored from external Ethernet data, other modules can be counted by receiving frame
The reading that module generates makes to can control signal to read data from the caching of receiving end.
Receiving frame statistical module can record the number for the ethernet data frame being stored in current receiving end caching.When there is a frame
When data are completely written to receiving end caching, which adds 1；When there is a frame data to read completely from the caching of receiving end, the mould
Block subtracts 1.Meanwhile the module also generates a receiving end caching and reads to make to can control signal, when frame number is greater than in the caching of statistics
When equal to 1, reading makes to can control signal unlatching, otherwise reads to make to can control signal-off, it is impossible to read number from the caching of receiving end
According to.
MAC Address extraction module will extract target MAC (Media Access Control) address and source MAC from received ethernet data frame.
Wherein, target MAC (Media Access Control) address will be passed to next module and use, and source MAC, which will be recorded in mac address table, is used as current network interface
Identifier, can realize the correct distribution of ethernet signal by inquiring the address information.
Transmitting terminal cache module stores the Ethernet data from FPGA, by sending the generation of frame statistical module
Reading makes to can control signal and gives external chip to read Data Concurrent frame by frame from transmitting terminal caching.
Sending frame statistical module can record the number for the ethernet data frame being stored in currently transmitted end caching.When there is a frame
When data are completely written to receiving end caching, which adds 1；When have a frame data from start end cache in read completely when, the mould
Block subtracts 1.Meanwhile the module also generates a transmitting terminal caching and reads to make to can control signal, when frame number is greater than in the caching of statistics
When equal to 1, reading makes to can control signal unlatching, otherwise reads to make to can control signal-off, it is impossible to read data from caching.To
Guarantee that data frame can completely be sent frame by frame.
4, data conversion module
Ethernet data frame is converted to FC data frame by data conversion module one end, and the other end turns received FC data frame
It is changed to ethernet data frame.As shown in figure 4, data conversion module includes target MAC (Media Access Control) address mapping block, ethernet signal acquisition
Module, FC data frame output module, FC data frame input module, ethernet signal extraction module, MAC Address extraction module sum number
According to distribution module.
It maintains an address mapping table in target MAC (Media Access Control) address mapping block, stores ethernet data frame in the table
The corresponding relationship of the address D_ID (FC_DID i.e. in table 2) of target MAC (Media Access Control) address and FC data frame, as shown in table 2.The Biao Ketong
Exterior arrangement port is crossed to be configured.
Table 2
By the table, corresponding FC data frame can be obtained according to the target MAC (Media Access Control) address of current ethernet data frame
The address D_ID, for follow-up data interaction.
Ethernet signal obtains module and is united by each receiving frame statistical module in detection Ethernet data processing module
The number of the frame of meter is come it is judged whether or not data need to send.When there is data to need to send, ethernet signal obtains mould
Block control FC data frame output module starts framing, and data to be sent are cached from the receiving end of Ethernet data processing module
It is read out in module, carries out data transmission.
FC data frame output module answers the D_ID signal in module to carry out data framing according to target MAC (Media Access Control) address mapping, and
Ethernet data is assembled in the data field of data frame according to the control signal that ethernet signal obtains module and is sent.
FC data frame input module receives the FC data frame exported from front-end module, and generates the instruction letter of each byte
Number.
The ethernet signal in data field is exported out ethernet signal extraction module by frame according to the input data.
Maintenance has an address lookup table in MAC Address extraction module, and it is corresponding with port to store MAC Address in the table
Relationship, as shown in table 3.
Table 3
After target MAC (Media Access Control) address in the ethernet signal exported in ethernet signal extraction module is extracted, according to
The table 3, can be obtained corresponding port numbers, according to the port numbers, control correct point that data distribution module carries out Ethernet data
Hair.
Ethernet data is distributed to correctly by the control signal that data distribution module is generated according to MAC Address extraction module
Port.
5, FC data processing module
FC data processing module is realized by optoelectronic transceivers, GTX (high speed serialization transceiver) and FC_IP core etc..Pass through light
Electric transceiver realizes the conversion of FC electric signal to optical signal；GTX of the Serdes based on FPGA, the serial/parallel conversion of realization FC signal,
The functions such as 8B/10B coding, clock recovery and CRC check；FC Link Primitives signal and original are handled using FC MAC protocol IP kernel
Word order column, realize the parsing and encapsulation to FC data frame.
In addition, in this embodiment, structure type is as shown in Figure 4 for data conversion module.But do not limit to
In the form, as long as can be realized the mutual conversion of the port FC Yu ethernet port data.
Claims (8)
1. the data conversion flow control methods that a kind of FC turns Ethernet, which comprises the steps of:
When the port FC and ethernet port carry out data conversion, the data traffic of ethernet port is detected；
The data traffic of ethernet port is compared with the data traffic upper limit value of setting:
When the data traffic for judging ethernet port is greater than the data traffic upper limit value of setting, control triggering FC back-pressure data,
The port FC is set to stop receiving data.
2. the data conversion flow control methods that FC according to claim 1 turns Ethernet, which is characterized in that pass through detection
The ethernet frame number of ethernet port caching detects the data traffic of ethernet port.
3. the data conversion flow control methods that FC according to claim 1 or 2 turns Ethernet, which is characterized in that when sentencing
When the data traffic of disconnected ethernet port is less than or equal to the data traffic upper limit value of setting, FC restores port to the shape for receiving data
State.
4. FC according to claim 1 turns the data conversion flow control methods of Ethernet, which is characterized in that the data
Flow rate upper limit value is fixed, or is configured by exterior arrangement interface.
5. the data conversion volume control device that a kind of FC turns Ethernet, which is characterized in that including processor, memory, interface
Chip, the processor realize following method for executing instruction:
When the port FC and ethernet port carry out data conversion, the data traffic of ethernet port is detected；
The data traffic of ethernet port is compared with the data traffic upper limit value of setting:
When the data traffic for judging ethernet port is greater than the data traffic upper limit value of setting, control triggering FC back-pressure data,
The port FC is set to stop receiving data.
6. the data conversion volume control device that FC according to claim 5 turns Ethernet, which is characterized in that pass through detection
The ethernet frame number of ethernet port caching detects the data traffic of ethernet port.
7. the data conversion volume control device that FC according to claim 5 or 6 turns Ethernet, which is characterized in that when sentencing
When the data traffic of disconnected ethernet port is less than or equal to the data traffic upper limit value of setting, FC restores port to the shape for receiving data
State.
8. the data conversion volume control device that FC according to claim 5 turns Ethernet, which is characterized in that the data
Flow rate upper limit value is fixed, or is configured by exterior arrangement interface.
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| CN201810167956.9A CN110213168B (en) | 2018-02-28 | 2018-02-28 | Data conversion flow control method and device for converting FC (fiber channel) into Ethernet |
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