CN110247852A - Broadcasting packet is reduced to the method and apparatus of ethernet switching device CPU impact - Google Patents
Broadcasting packet is reduced to the method and apparatus of ethernet switching device CPU impact Download PDFInfo
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- CN110247852A CN110247852A CN201910611432.9A CN201910611432A CN110247852A CN 110247852 A CN110247852 A CN 110247852A CN 201910611432 A CN201910611432 A CN 201910611432A CN 110247852 A CN110247852 A CN 110247852A
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- broadcast
- ethernet
- switching device
- exchange
- control cpu
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/16—Multipoint routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention relates to field of data communication; it discloses and reduces the method and apparatus that broadcasting packet influences the control CPU processing capacity of ethernet switching device; ethernet switching device takes the Ethernet broadcast function of exchange for periodic turning off and opening ethernet switching device; so that during closing Ethernet broadcast function of exchange; CPU is controlled in the case where no broadcasting packet occupies processing capacity; the core functions such as network protection are completed, and do not influence normally to communicate exchange.It is particularly suitable for requiring network reliability high, network complexity Ethernet network environment.
Description
Technical field
The present invention relates to field of data communication, more particularly to reduce broadcasting packet to the control CPU of ethernet switching device
The influence of processing capacity.
Background technique
Ethernet switching device at present, such as interchanger and router, composition include switching part and the control portion CPU
Point, switching part is connected by ethernet channel with serial-port with control CPU part.Switching part includes exchange chip, is handed over
Changing chip can be asic chip, be also possible to fpga chip；Controlling CPU part includes control cpu chip.Also core will be exchanged by having
Piece and control CPU are incorporated into one piece of phy chip, but are still segmented into above two parts in logic.CPU is controlled to exchange part
The control divided is that the control register for reading and writing exchange chip by serial-port is completed, serial-port such as SPI, I2C etc.；Control
CPU part, which connect and received with switching part, handled and send Ethernet data by ethernet channel, realizes its control function.
Communication between two user equipmenies is generally basede on unicast, but broadcast is again essential, such as user equipment needs
When obtaining opposite equip. MAC Address, it is necessary to ARP broadcasting packet is constantly sent, until obtaining opposite equip. MAC Address.Also
Many server softwares and user equipment software, can also rely on the mode of periodic broadcast, and certain applications are realized in help.
For the communication of two user equipmenies, broadcasting packet is interference signal, will increase packet delay and shake, is occupied
Communication bandwidth improves the uncertainty of exchange.Importantly, control CPU part ethernet communication be based on TCP/IP,
A large amount of broadcasting packet must be handled and/or abandon, such processing can occupy the processing capacity of control CPU, at the scene environment
In, especially industry spot, the function of network protection are completed by control CPU, control the processing capacity of CPU by site environment
It is required that the control with cost, processing capacity will not be very powerful.When control CPU is because handling the work such as a large amount of broadcasting packet
When, no processing capacity goes processing network protection function, be easy to cause network paralysis and broadcast storm, or in broadcast storm
In, operational network defencive function more is removed without processing capacity, so that network paralysis can not be got rid of.
Summary of the invention
The invention patent technical problems to be solved are to alleviate negative influence of the broadcast to control CPU processing capacity is occupied,
Guarantee that control CPU has enough processing time and ability to go the functions such as processing network protection；Guarantee normal communication exchange simultaneously.
The technical scheme is that reducing broadcasting packet in conjunction with Fig. 1 and handling the control CPU of ethernet switching device
The method of the influence of ability, ethernet switching device, which is taken, periodic turns off and opens Ethernet broadcast function of exchange.Ether
After net switching equipment opens Ethernet broadcast exchange a period of time T12, broadcast function of exchange is closed, so that ethernet switching device
Control CPU do not have to processing broadcasting packet, the processing time having more and processing capacity go to complete the functions such as network protection.It closes
After closing Ethernet broadcast exchange a period of time T11, broadcast function of exchange is opened, ethernet switching device normally handles unicast, group
It broadcasts and broadcasts.T12 is a cycle plus T11, is recycled repeatedly.T12 the and T11 time is arranged, as long as guaranteeing that Ethernet is handed over
Always there are enough processing time and processing capacity in control CPU each period of exchange device, goes the function of completing network protection, again
It will not influence normally to communicate exchange because of short-term closing broadcast capability.For example, T12=4 second, T11=1 second.
Further, the opening and closing Ethernet broadcast function of exchange in each period should have highest or high
Priority, will not be controlled CPU part and need to handle other business and block or postpone its realization and open or close Ethernet
Broadcast the operation of function of exchange.
Further, after closing Ethernet broadcast function of exchange, switching part in ethernet switching device is emptied at once
And/or the Ethernet broadcasting packet that control CPU has been received and cached, it prevents from occupying control because of processing cached broadcast message
The processing capacity of CPU.
Further, each cycle time opens the time T12 of broadcasting packet forwarding capability and closes broadcasting packet forwarding
The time T11 of function can be fixedly installed default value, reduce the requirement to control CPU in this way；It can also be according to exchanging shape at that time
Condition and change, such as when control ethernet switching device load either broadcast load it is little when, each period can be extended
The interior time T12 for opening broadcasting packet forwarding capability and/or the time for shortening closing broadcasting packet forwarding capability in each period
T11, or even do not close broadcast exchange within this period.Vice versa.
Further, defaulted according to periodic test and open or be not turned on, manual command or check exchange network shape at that time
Condition.Constantly open and close to adjustment activation or deactivation cycle the function of Ethernet broadcast exchange.
For in normal communication process, the ARP of broadcast or other service broadcasts, be all periodically, it is so short-term in
Disconnected influence will not influence the realization of function.Meanwhile exchange broadcast exchange is closed in the time in each period and each period
Time is all that can be made adjustment according to real time status, even more guarantees that influence of the closing broadcast capability to normal communication is very small.
The utility model has the advantages that being opened and closed periodically the broadcast function of exchange of ethernet switching device, Ethernet ensure that
Switching equipment periodically in the case where not handling broadcasting packet, has enough processing time and processing capacity to go to complete key
Function, such as network protection function.Stable operation for ethernet switching device and in the Network Abnormals situation such as broadcast storm
It breaks away from, it is extremely important and effective.
Detailed description of the invention
Fig. 1 is that ethernet switching device periodically opens and closes the time diagram for opening broadcast function of exchange.
Fig. 2 is to reduce broadcast to the flow diagram of the method for the control CPU impact of ethernet switching device.
Fig. 3 is to control cpu cycle property to open and close the module composition schematic diagram for opening broadcast function of exchange.
Fig. 4 is that selection and activation deactivate 31 functional sequence schematic diagram of flexible module.
Fig. 5 is to close broadcast 32 functional sequence schematic diagram of Switching Module.
Fig. 6 is to open broadcast 33 functional sequence schematic diagram of Switching Module.
Fig. 7 is the control content of registers schematic diagram for opening or closing broadcast function of exchange of BCM53262 exchange chip
Specific embodiment.
Embodiment 1: the method for reducing influence of the broadcasting packet to the control CPU processing capacity of ethernet switching device.
In conjunction with Fig. 2.Step S21: ethernet switching device detects current network conditions, such as detection is received from Ethernet interface
The rate of the broadcasting packet arrived, or the memory values etc. of the relevant broadcasts message rate of exchange chip are read, determination is worked as
The situation of preceding network.Although the step for be optimization the step of.But this can for adjustment open broadcasting packet forwarding capability when
Between T12 and close broadcasting packet forwarding capability time T11 provide foundation.And not necessarily using fixed default value.
Step S22: ethernet switching device closes Ethernet and broadcasts function of exchange, duration T11, so that ether
The control CPU of net switching equipment does not have to processing broadcasting packet, the processing time more having and processing capacity, goes to complete network guarantor
The function of shield.
Step S22: broadcast function of exchange is opened, duration T12, ethernet switching device normally turns within this time
Unicast, multicast and the broadcast data for sending out all.
Step S21 is repeated back to, is constantly recycled.
Further, each cycle time opens the time T12 of broadcasting packet forwarding capability and closes broadcasting packet forwarding
The time T11 of function can be using fixed default value, can also be with the situation adjustment that current network exchanges.Optimization Steps S21
In, the relevant broadcasts message rate of the rate or exchange chip for the broadcasting packet that control CPU is received from Ethernet interface is deposited
Reservoir numerical value etc. determines current Network status, as the foundation with adjustment T12 and T11 length of time.T12's and T11 takes
Value, it is ensured that it is total certain without handling broadcasting packet in control CPU each period, and handle key business and at least to positive normal open
The influence of news.Such as it is little in the load of broadcast, the T12 time for opening broadcasting packet forwarding capability can be extended or shortened every
The time T11 of function of exchange is closed in a period, or even does not close broadcast function of exchange within this period.Vice versa.
Further, the closing in each period and unlatching Ethernet broadcast function of exchange should have highest or high
Priority guarantees that closing Ethernet broadcast function of exchange will not be blocked because of other task runs.
Further, after closing Ethernet broadcast function of exchange, control CPU, which goes to empty in ethernet switching device, at once is handed over
It changes part and/or control CPU has received Ethernet broadcasting packet caching, prevent the Ethernet broadcasting packet of caching from occupying control
The processing capacity of CPU.
Further, it is periodically detected default activation or does not activate, manual command or detection exchange network situation at that time, no
Disconnected adjustment activation deactivates this function, that is, is opened and closed periodically Ethernet broadcast and exchanges this function.
Specifically how to realize this mode, there are many kinds to those skilled in the art, reference can be made to the control of embodiment 2
CPU processed uses hardware timer hard break mode, realizes periodically to open and close and opens broadcast function of exchange.It can also take soft
The modes such as part timer interruption.
Embodiment 2: ethernet switching device realizes that reducing broadcast carries out network to the control CPU of ethernet switching device
Defencive function influences.
Ethernet switching device includes switching part and control CPU part, and switching part and control CPU part pass through ether
Netcom road is connected with serial-port.Switching part includes the exchange chip of core, and exchange chip can be asic chip, can also be with
Make fpga chip；Controlling CPU part includes control cpu chip.Also have and exchange chip and control CPU are incorporated into chip piece
, but it is still segmented into above two parts in logic.Controlling CPU to the control of switching part is completed by serial-port
, serial-port such as SPI, I2C etc., control CPU part are connect with switching part by ethernet channel and rely on processing and hair
It send Ethernet data help to realize and controls its function.
In conjunction with Fig. 3, controlling CPU part further includes selecting to deactivate flexible module 31 with activation, closing broadcast Switching Module 32, open
Open broadcast Switching Module 33.Selection with activation deactivate flexible module 31 be periodically detected default activation or do not activate, manual command or
Automatic activation, constantly adjustment activate or deactivate this function, that is, are opened and closed periodically Ethernet broadcast function of exchange.Its
In automatically activation need first periodically check current Network status, decide whether activate or deactivate, this be based on current net
Matching degree of the road flow to the processing capacity of control CPU.After activating this function, control cpu cycle property closing broadcast is executed
Switching Module 32 and unlatching broadcast Switching Module 33.Then ethernet switching device is deactivated to be always maintained at or restore to allow Ethernet
Broadcast the function of exchange.
Modules embodiment is relatively more, and the modes such as software timer can be used, and thinking is similar.Below to control CPU
The mode of hardware timer hard break the example of each module specific implementation is realized for one.
Flexible module 31 is deactivated in conjunction with the selection and activation of Fig. 4.Step S311 chooses whether to take default activation or artificial sharp
Living, if so, thening follow the steps S312, step S312, setting hardware opens the initial value T12C of broadcast timer T12T, starting
Hardware broadcasts timer T12T, enables hardware broadcast timer T12T and interrupts, then enters state of activation, thus can be periodically
It executes and closes broadcast Switching Module 32, opens broadcast Switching Module 33；If it is not, then entering step S314, judgement is
Automatic activation.If it is not, then executing step S318, broadcast exchange is opened, T11T and T12T hardware is closed, finally interrupts and exits
Selection deactivates flexible module 31 with activation；If so, entering step S315, it is periodically detected current network state, it is determined whether need
Activate this function.If so, thening follow the steps S316, step S317, setting hardware broadcasts the initial value of timer T12T, opens
Dynamic hardware broadcasts timer T12T, enables hardware broadcast timer T12T and interrupts, then enters state of activation, can periodically carry out
It closes broadcast Switching Module 32, open broadcast Switching Module 33；If it is not, then executing step S318, broadcast exchange is opened, is closed
T11T and T12T hardware is closed, finally selection is exited in interruption and activation deactivates flexible module 31.
Switching Module 32 is broadcasted in conjunction with the closing of Fig. 5.It controls CPU operating procedure S321 and detects current network state, step
Whether S322 needs to close broadcast exchange according to current network state judgement, if you do not need to closing, executes step S327, if
The initial value T12C that hardware opens broadcast timer T12T is set, starting hardware broadcasts timer T12T, into next circulation；Such as
Fruit needs to close, and executes step S323, and the control register of exchange chip is written by serial-port by control CPU, closes ether
Net broadcast function of exchange.Then step S324 is preferentially executed, control CPU, which is removed, is buffered in control CPU and/or exchange chip
Broadcasting data messages.Then step S325 is executed, is determined according to Network status and default value or modification is maintained to close broadcast timer
The initial value T11C of T11T then executes step S326, and broadcast exchange timer T11T initial value T11C is closed in setting, and open and close is wide
Broadcast timer T11T.
Switching Module 33 is broadcasted in conjunction with the closing of Fig. 6.CPU operating procedure S331 is controlled, control CPU is write by serial-port
Enter the control register of exchange chip, opens Ethernet and broadcast function of exchange.Then preferably operating procedure S332, detection are current
Network state.Then step S333 is executed, is determined according to Network status and default value or modification is maintained to open broadcast timer T12T
Initial value T12C, then execute step S334, broadcast exchange timer T12T initial value T12C is opened in setting, and open and close broadcast is fixed
When device T12T.
Specifically, control CPU checks current network conditions, can use for example, what control CPU was received from Ethernet interface
The rate of broadcasting packet, or by serial line interface read switching part exchange chip relevant broadcasts message rate storage
Device numerical value, or the processor occupancy etc. of control CPU.Current network conditions be determine open broadcast swap time T12 and
Close the foundation of broadcast swap time T11.Can certainly, the fixed T12 and/or T11 time is constant, to simplify so that control
The task of CPU.Its time be set as guaranteeing in control CPU each period total certain processing time do not have to processing broadcasting packet and
Processing key business is gone, and the influence to normal communication is minimum.Such as it is little in the load of broadcast, the macrocyclic time can be prolonged
Or shorten the time that function of exchange is closed in each period, vice versa, or even does not close broadcast exchange function within this period
Energy is equal.
Specifically, ethernet switching device opens or closes broadcasting packet forwarding capability, serial number is passed through using control CPU
According to interface, the control register of corresponding exchange chip is written to switching part.As shown in Figure 7 with company, Botong exchange chip
For BCM53262, by the register Broadcast Forward Map Register's of page 00/addr 20H
BCST_FWD_MAP [52:24] sets 1 on corresponding bit 41, then allows broadcast data to export on corresponding port；By BCST_
FWD_MAP [52:24] sets 0 on corresponding bit 41, then forbids broadcast data to export on corresponding port.Realize open or
It is the broadcasting packet forwarding capability for closing entire exchange chip or section ports.
Specifically, timer hardware interrupts will generate interruption to the time, while broadcast timer T11T will be closed and opened
The interrupt priority level for opening closing broadcast timer T12T is located at highest or relatively high, interrupts and carries out corresponding closing after generating
It broadcasts Switching Module 32, open broadcast Switching Module 33.It will not be blocked or be postponed by other task process.
Claims (6)
1. reducing the method that broadcast influences the control CPU processing capacity of ethernet switching device, it is characterised in that: Ethernet is handed over
Exchange device includes the following steps that step 1: ethernet switching device closes Ethernet and broadcast function of exchange within each period,
Duration is T11；Step 2: ethernet switching device unlatching broadcast function of exchange, duration T12, T12 and T11's
Time span based on have in control CPU each period of ethernet switching device the regular hour do not need processing broadcasting packet,
And there are enough processing time and processing capacity to go to complete the function of network protection, and will not be because closing broadcast capability in short term due to shadow
Ring normal communication exchange；Step 3: executing step 1.
2. the method according to claim 1 for reducing broadcast and the control CPU processing capacity of ethernet switching device being influenced,
It is characterized in that, it is periodically detected default activation, artificial activation or automatic active mode, constantly adjustment activation or deactivation right
It is required that the function of broadcast exchange is periodic turned off and opened defined by 1；Wherein automatic activation checks currently periodic
Network status on the basis of, it is determined whether activation or deactivation cycle close and open broadcast exchange function, this is based on
Present flow rate is to control CPU processing capacity influence degree.
3. the method according to claim 1 for reducing broadcast and the control CPU processing capacity of ethernet switching device being influenced,
It is characterized in that, each cycle time opens the time T12 of broadcasting packet forwarding capability and closes broadcasting packet forwarding capability
Time T11 is to immobilize or adjusted according to ethernet switching device current network conditions.
4. the method according to claim 1 for reducing broadcast and the control CPU processing capacity of ethernet switching device being influenced,
Function of exchange is broadcasted it is characterized in that, executing and periodically closing and open Ethernet, is had most in ethernet switching device
High or high priority, so that opening and closing Ethernet broadcast function of exchange will not be blocked by the operation of other tasks
Or delay.
5. the method according to claim 1 for reducing broadcast and the control CPU processing capacity of ethernet switching device being influenced,
It is characterized in that, emptying switching part in ethernet switching device at once after closing Ethernet broadcast function of exchange in step 1
And/or control CPU has received the Ethernet broadcasting packet of caching.
6. ethernet switching device, including switching part and control CPU part, switching part and control CPU part pass through ether
Netcom road is connected with serial-port, it is characterised in that: control CPU part further includes that selection and activation deactivate flexible module (31), close
It closes broadcast Switching Module (32), open broadcast Switching Module (33), ethernet switching device realizes claim 1-5 any one
The method that the reduction broadcast influences the control CPU processing capacity of ethernet switching device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910611432.9A CN110247852A (en) | 2019-07-08 | 2019-07-08 | Broadcasting packet is reduced to the method and apparatus of ethernet switching device CPU impact |
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| CN201910611432.9A CN110247852A (en) | 2019-07-08 | 2019-07-08 | Broadcasting packet is reduced to the method and apparatus of ethernet switching device CPU impact |
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