CN101047564A - Network communication equipment platform and method for implementing high reliability on it - Google Patents
Network communication equipment platform and method for implementing high reliability on it Download PDFInfo
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Abstract
A device platform of network communication is prepared as maintaining operation state identification used for indicating whether operation state of network processor is normal or not by network processor, monitoring whether operation state of said network processor is normal or not by universal processor as per said operation identification, sending reset command to network processor by universal processor when operation state of network processor is abnormal, executing reset operation by network processor in response to said rest command, restarting up network processor to restore state before fault then resetting current buffer storage and register requiring to be reset.
Description
Technical field
The present invention relates to computer network communication technology, the method for the reliability of the network communication equipment platform that particularly a kind of raising is core with the network processing unit, the network processing unit fault detection method on the network communication equipment platform and network communication equipment platform, network processing unit and the general processor of realizing this method.
Background technology
Along with the fast development of computer network and Internet, network is to the rapid growth that requires of bandwidth, and new application, the new business of the Internet emerge in an endless stream simultaneously, and this just needs network constantly to upgrade.Network processing unit has solved the shortcoming that the pure software performance of network equipments is low and pure hardware device can not be upgraded flexibly well, is widely adopted in the design of router, switch.But network processing unit adopts the hardware structure of ASIC (special integrated chip), has general CPU (central processing unit) again the characteristics of software programming simultaneously.
Adopt the network equipment of network processing unit, especially high-end devices has very high requirement to reliability, require the availability of system to be better than 99.999% at the network core node, MTBF (system's time between failures) surpasses 400,000 hours, and real-time service such as voice, video etc. require the failure recovery time less than 50 milliseconds especially.Network processing unit comes out later, use and also just formed scale, the problem of hardware or software exists unavoidably, the type that adds the internet data bag is various, internet worm, assault etc. are frequent to be occurred, and network processing unit catastrophic consequence may occur in the face of these situations the time, directly cause network traffic interruption, and then the whole network paralysis, to operator or domestic consumer all is difficult to accept.
At this class problem some solutions are arranged at present, as finding malfunctioning node by network layer Routing Protocol, MPLS (multiprotocol label switching) signaling or link layer Spanning-Tree Protocol, thereby change the forwarding-table item of data forwarding aspect, reach the protection of network topology level; This scheme can solve to a certain extent because the network paralysis that the fault of a certain point device causes, but recover proper communication by the signaling discovery mechanism and need between node, exchange a large amount of signalings, generally need recovery time more than three minutes, the user can feel obviously that suspension takes place.Another scheme is the Restoration Mechanism of node level, house dog by hardware or software regularly checks this equipment state, in case finding fault restarts equipment immediately, this scheme can be avoided the influence of single fault node to other node, but because equipment need dispose bulk information when restarting, the startup of equipment own also needs certain hour, so though can shorten in one minute recovery time, but still can not satisfy the real-time service requirement.
Summary of the invention
The objective of the invention is to realize a kind of recovery mechanism of chip-scale at network processor platform, the network processor chip that only relates to the failure chip cisco unity malfunction when making fault recovery, other all parts to equipment are not done any operation, do not interrupt signaling, do not revise configuration, Restoration Mechanism only influences the data forwarding flow relevant with fault.Can satisfy carrier class real-time service and use less than 50 milliseconds the recovery time of this scheme.
According to one aspect of the invention, a kind of method that realizes high reliability on network communication equipment platform is provided, in this network communication equipment, on network processing unit, realize datum plane, and on general processor, realizing control plane, this method comprises: whether the running status of being monitored described network processing unit by general processor is normal; When this general processor detects the network processing unit running status when undesired, this general processor sends reset instruction to this network processing unit; Respond described reset instruction, described network processing unit is carried out reset operation.
Preferably, described network processing unit maintenance operation status indicator, whether described running status sign is used to indicate the running status of described network processing unit normal, and described general processor identifies to determine by monitoring this running status whether the running status of described network processing unit is normal.
According to a further aspect of the present invention, network processing unit on a kind of network communication equipment platform fault detection method is provided, this network processing unit is used to realize datum plane, also comprise general processor in the described network communication equipment platform, be used to realize control plane, this method comprises: network processing unit maintenance operation status indicator, and whether described running status sign is used to indicate the running status of described network processing unit normal; Whether the running status sign of being monitored described network processing unit by general processor is normal; Identify when undesired when this general processor detects the network processing unit running status, determine that described network processing unit breaks down.
According to a further aspect of the present invention, provide a kind of network communication equipment platform, having comprised: general processor, be used to realize control plane, and network processing unit, be used to realize datum plane.Described general processor comprises: monitoring unit, and whether the running status that is used to monitor described network processing unit is normal; With reset instruction generation and transmitting element, be used for when monitoring unit finds that the network processing unit running status is undesired, generating reset instruction, and sending it to described network processing unit.Described network processing unit comprises: the reset instruction receiving terminal is used for receiving reset instruction from general processor; And reset unit, carry out the reset operation of network processing unit in response to described reset instruction.
According to a further aspect of the present invention, a kind of network processing unit is provided, be used for realizing datum plane at network communication equipment platform, also comprise general processor in the described network communication equipment platform, be used to realize control plane, described network processing unit comprises: running status sign maintenance unit, be used to safeguard running status sign by described general processor monitoring, and whether described running status sign is used to indicate the running status of described network processing unit normal.
According to a further aspect of the present invention, a kind of network processing unit is provided, be used for realizing datum plane at network communication equipment platform, also comprise general processor in the described network communication equipment platform, be used to realize control plane, described network processing unit comprises: the reset instruction receiving terminal is used for receiving reset instruction from general processor; Reset unit is carried out the reset operation of network processing unit in response to described reset instruction.
According to a further aspect of the present invention, a kind of general processor is provided, be used for realizing control plane at network communication equipment platform, also comprise network processing unit in the described network communication equipment platform, be used to realize datum plane, described general processor comprises: monitoring unit, and whether the running status that is used to monitor described network processing unit is normal; Reset instruction generation and transmitting element are used for generating reset instruction, and sending it to described network processing unit when monitoring unit finds that the network processing unit running status is undesired.
Description of drawings
Fig. 1 shows with the network processing unit integrated circuit board logical construction of the network communication equipment platform that is core;
Fig. 2 shows the schematic block diagram according to general processor in the network communication equipment platform of the present invention and network processing unit; And
Fig. 3 shows according to the present invention the flow chart of realizing the method for high reliability on network communication equipment platform.
Embodiment
The equipment platform that with the network processing unit is core all needs a general processor at least on hardware structure, general processor is operation and relevant functions such as device initialize, operational management, condition monitoring on function.With datum plane and control plane separately, datum plane relates to general forwarding of flow to be handled on the software architecture, have data volume big, real-time, handle characteristic of simple, mainly finish by network processing unit; Control plane such as the execution of route signaling, network management information announcement, the processing of complex data bag etc. are mainly finished by general processor, and data volume is little and do not need hard real time, can do profound complicated processing data packets.Because datum plane and control plane are separated from hardware structure and software architecture, therefore only relating to the fault that the fault of datum plane promptly only causes by network processing unit can not need general processor to carry out fault restoration, and repair only need be carried out at network processing unit.Network processing unit is a chips on hardware logic, is different from general processor, has characteristics such as quick startup, task is simple, resource is less, and this makes and can finish fast by certain means that reset at the fault restoration of network processor chip.
Fig. 1 shows with the network processing unit integrated circuit board logical construction of the network communication equipment platform that is core, mainly contains network processing unit, general processor and line interface chip.Data flow is divided into transmits data and signaling data, transmits data and only gives the network processing unit processing by data channel, directly turns back to the line side then; After signaling data enters network processing unit, give general processor through management channels again and carry out signaling calculating; General processor to the management of network processing unit and monitor message also by the management channels transmission.General processor only is responsible for the relevant processing of control plane, and network processing unit only is responsible for the processing of datum plane.
Fig. 2 shows the schematic block diagram according to general processor in the network communication equipment platform of the present invention and network processing unit, wherein show closely-related module, and omitted other module of the general utility functions that are used to realize general processor and network processing unit with the present invention.As shown in Figure 2, general processor 1 comprises monitoring unit 11 and reset instruction generation and transmitting element 12.Network processing unit 2 comprises running status sign maintenance unit 21, reset instruction receiving terminal 22, reset unit 23.
Fig. 3 shows according to the present invention the flow chart of realizing the method for high reliability on network communication equipment platform.This method comprises fault detect stage of network processing unit and the network processing unit reseting stage after breaking down.Fig. 3 is made up of the two large divisions, left-hand component is the monitor task flow process that runs on general processor, this task identifies to judge whether network processing unit is working properly by the normal operation of continuous requester network processor, if find that its operation is undesired then send reset instruction immediately.Right-hand component is the program circuit that runs on network processing unit, except normal initialization and retransmission process, reset routine is the key modules that guarantees that network processing unit can true(-)running after resetting, its effect is to recover key parameter from the preceding state that resets, and these parameters comprise register, formation, various storage organization and the statistical counting etc. searched.
Below with reference to Fig. 2 and Fig. 3 the method that realizes high reliability according to network communication equipment platform of the present invention is described.
The startup initialization of network processing unit, running state monitoring need general processor to assist.Monitoring unit 11 is provided in general processor 1, thereby in system task, starts a monitor task, whether normal with the running status of monitoring network processor 2.It will be understood by those skilled in the art that a variety of means can be for the running status of monitoring unit 11 employings with monitoring network processor.Here, whether the running status safeguarded of our sign of the running status by providing in network processing unit 2 maintenance unit 21 to identify the running status of indicating described network processing unit normal.Monitoring unit 11 in the general processor 1 then identifies to determine by monitoring this running status whether the running status of network processing unit 2 is normal.This running status sign maintenance unit 21 can be realized by the activity counter of network processing unit software (as microcode), thereby this sign is the activity counter of network processing unit software (as microcode); Also can identify maintenance unit 21 as running status by the active register that network processor chip itself provides, thus the active register flag bit that this sign is a network processor chip itself to be provided.The majority of network processor chips itself provide active register sign position (but not all network processor chip has), but these sign positions just are used for the debug phase uses, in normal network communication equipment platform running, be not used, thereby also of no use its offers general processor as normal operation sign and monitors.Activity counter then is the new proposition of the present invention, be used for active instruction cycle count to network processing unit, can in the software of all network processing units (when particularly chip itself does not provide active register), realize, if abnormal conditions such as no longer increasing progressively appears in the active instruction cycle count value, then show network processing unit retransmission process instruction inefficacy, thereby the decision network processor breaks down.
Under normal circumstances, the running status of network processing unit 2 sign maintenance unit 21 will provide normal running status sign.The normal operation sign of monitoring unit 11 real time monitorings (inquiry) network processing unit in the general processor 1, and judge whether this sign is normal.If sign is normal, then after predetermined time-delay, continue to carry out monitoring.In case find normal running status sign inefficacy (network processing unit 2 running statuses are undesired), be that the decision network processor breaks down, 12 of reset instruction generation and transmitting elements generate the network processing unit reset instruction immediately, and (this instruction can realize by the message announcement of software code, also can realize by the reset button of hardware register), and send it to network processing unit 2.After monitor task wait network processing unit resetted success then, the normal operation that continues the monitoring network processor identified.
In response to this reset instruction, network processing unit 2 begins to carry out reset operation.Particularly, network processing unit 2 is carried out the self-starting reset routines by reset unit 23 after receiving reset instruction from general processor 1 by reset instruction receiving terminal 22.Reset routine is triggered by the reseting logic of network processor chip, and what be similar to chip powers up operation first, but needs extra program such as perfect state protection, recovering state.Register and storage organizations all when resetting are not carried out initialization action, and the state before therefore resetting is able to automatic protection; After chip reset restarts, reset routine at first recovers the state that need run without interruption, as wrap quene state, with general processor communications status, statistical counter state etc., reset then current bag buffer memory and other register that need reset, the last network processing unit normal code of transmitting that brings into operation.
As shown in Figure 2, reset unit 23 comprise judging unit 24, first initialization unit 25, repair unit 26.Network processing unit 2 power up restart after, judging unit 24 judges whether to power up first startup.If power up startup first, then by the common initialization flow process of initialization unit 25 execution first, this is irrelevant with fault detect of the present invention and recovery.And break down and send to network processing unit 2 under the situation of reset instruction at general processor 1 decision network processor as mentioned above, judging unit 24 will be judged and not be to power up first startup, so carry out the reset operation of network processing unit 2 by repairing unit 26, wherein when powering up startup once more, network processing unit 2 has recovered the state before the fault automatically.
Repair unit 26 and comprise part reset unit 27, it makes current bag buffer memory and the register (being not whole registers) that need reset resets.
Repair unit 26 and can also comprise correcting unit 28, it proofreaies and correct the register that needs correction.Correcting unit 28 comprises lock unit 29, and it carries out synchronous correction to the synchronous register of needs.
In technical scheme of the present invention, three kinds of modes are arranged: initialization, recover state before the fault, correction for the processing of register etc.Which register adopting which kind of processing to judge according to actual conditions to, those skilled in the art can make right judgement according to concrete network processing unit type when specific implementation.The state that the recovery of above mentioning runs without interruption refers to next two kinds of processing.
When network processing unit 2 resets to all registers, storage organization etc. do not do reset operation (generally speaking in other words prior art to chip reset the time, all registers all can be composed a last default value, also be that register also has been reset simultaneously), after network processing unit started once more, the state before the fault was able to automatic recovery like this.But owing to have some a spot of registers etc. need return to initialized value in the actual conditions, also some register need be proofreaied and correct, and could guarantee that ensuing retransmission process can operate as normal.The effect of reset operation of the present invention just is this.
Because general processor is real-time to the monitoring of network processing unit, reset instruction can be sent after network processing unit breaks down immediately, the reset routine of network processing unit is by hardware trigger, only need to increase a small amount of code and get final product the completion status recovery operation, operation only relates to component register, be left intact for the various storage organizations that need the long period to carry out reset operation, the signaling of moving on the general processor, tasks such as management are not affected, whole system does not need to restart, system does not need to re-execute configuration yet, therefore the time from the trouble shooting of breaking down can be controlled in 50 milliseconds fully, makes the real-time telecommunication service use and can not interrupt.Be worth the network processing unit of explanation only to handle a packet constantly in addition at each, also be each have only constantly a packet enter network processing unit obtain the service, other packet that enters system's integrated circuit board temporarily is buffered in the buffer memory of line interface chip, therefore carry out in the process of reset operation at network processing unit, only currently just be dropped at a processed packet, this reliability to network is significant.
As mentioned above, the invention provides a kind of is the method that realizes high reliability on the equipment platform of core at network processing unit.This method is when network processing unit work is undesired, in time found by the monitor task of the general processor on integrated circuit board operation, and only the means by the reseting network processor chips reaches node failure and remove purpose.
The present invention also provides a kind of network processing unit fault detect means.Its method is to safeguard running status sign when normally moving by the software of network processing unit (microcode), in case the microcode operation is undesired, this status indicator can be found by the monitor task that runs on general processor.
The present invention also provides a kind of network processing unit Restoration Mechanism that resets.When carrying out reset operation, system mode is not carry out initialization action when resetting to be protected, and at the one section special reset routine of back operation that resets part is needed initialized initialization of register, can true(-)running after it is resetted.
Although specifically show and described the present invention with reference to the preferred embodiments of the present invention, but persons skilled in the art should be understood that, under the situation that does not break away from the spirit and scope of the present invention that claims limit, can carry out various modifications on form and the details to it.
Claims (18)
1. method that realizes high reliability on network communication equipment platform, in this network communication equipment, realize datum plane, and realize control plane on general processor that this method comprises on network processing unit:
Whether the running status of being monitored described network processing unit by general processor is normal;
When this general processor detects the network processing unit running status when undesired, this general processor sends reset instruction to this network processing unit;
Respond described reset instruction, described network processing unit is carried out reset operation.
2. the method for claim 1, wherein, described network processing unit maintenance operation status indicator, whether described running status sign is used to indicate the running status of described network processing unit normal, and described general processor identifies to determine by monitoring this running status whether the running status of described network processing unit is normal.
3. method as claimed in claim 2, wherein, described normal operation sign is the activity counter of network processing unit software or active register sign position that network processor chip itself provides.
4. the method for claim 1, wherein described reset operation comprises:
Network processing unit restarts;
Recover the preceding state of fault;
The register that resets current bag buffer memory and need reset.
5. method as claimed in claim 4, wherein, described reset operation also comprises: proofread and correct the register that needs are proofreaied and correct.
6. method as claimed in claim 5, wherein, described correction comprises synchronous correction.
7. method as claimed in claim 4, wherein, the state before the described fault comprises: the bag quene state, with general processor communications status, statistical counter state at least one.
8. method as claimed in claim 4, the step of the state before the described recovery fault comprises: recover register, formation, various at least one parameter of searching in storage organization and the statistical counting.
9. the network processing unit fault detection method on the network communication equipment platform, this network processing unit is used to realize datum plane, also comprises in the described network communication equipment platform being used to realize control plane by general processor, this method comprises:
Network processing unit maintenance operation status indicator, whether described running status sign is used to indicate the running status of described network processing unit normal;
Whether the running status sign of being monitored described network processing unit by general processor is normal;
Identify when undesired when this general processor detects the network processing unit running status, determine that described network processing unit breaks down.
10. network communication equipment platform comprises:
General processor is used to realize control plane, and described general processor comprises:
Monitoring unit, whether the running status that is used to monitor described network processing unit is normal; With
Reset instruction generation and transmitting element are used for generating reset instruction, and sending it to described network processing unit when monitoring unit finds that the network processing unit running status is undesired; And
Network processing unit is used to realize datum plane, and described network processing unit comprises:
The reset instruction receiving terminal is used for receiving reset instruction from general processor; With
Reset unit is carried out the reset operation of network processing unit in response to described reset instruction.
11. network communication equipment platform as claimed in claim 10, wherein,
Described network processing unit also comprises: running status sign maintenance unit, be used for the maintenance operation status indicator, and whether described running status sign is used to indicate the running status of described network processing unit normal,
The monitoring unit of described general processor identifies to determine by monitoring this running status whether the running status of described network processing unit is normal.
12. network communication equipment platform as claimed in claim 11, wherein, described running status sign maintenance unit comprises one of activity counter and active register.
13. network communication equipment platform as claimed in claim 10, wherein, the reset unit of described network processing unit comprises:
Judging unit is used for judging whether power up startup first;
Initialization unit first is used for carrying out the initialization operation of network processing unit under the situation that powers up startup first;
Repair the unit, being used for be not to power up first under the situation of startup, carries out the reset operation of network processing unit, and wherein when powering up startup once more, network processing unit recovers the state before the fault automatically,
Wherein, described reparation unit comprises:
The part reset unit is used to make current bag buffer memory and the register that need reset resets.
14. network communication equipment platform as claimed in claim 13, wherein, described reparation unit also comprises correcting unit, is used to proofread and correct the register that needs are proofreaied and correct.
15. network communication equipment platform as claimed in claim 14, wherein, described correcting unit comprises the synchronous correction unit, is used for the synchronous register of needs is carried out synchronous correction.
16. a network processing unit is used for realizing datum plane at network communication equipment platform, also comprises in the described network communication equipment platform being used to realize control plane by general processor, described network processing unit comprises:
Running status sign maintenance unit is used to safeguard the running status sign by described general processor monitoring, and whether described running status sign is used to indicate the running status of described network processing unit normal.
17. a network processing unit is used for realizing datum plane at network communication equipment platform, also comprises in the described network communication equipment platform being used to realize control plane by general processor, described network processing unit comprises:
The reset instruction receiving terminal is used for receiving reset instruction from general processor;
Reset unit is carried out the reset operation of network processing unit in response to described reset instruction.
18. a general processor is used for realizing control plane at network communication equipment platform, also comprises in the described network communication equipment platform being used to realize datum plane by network processing unit, described general processor comprises:
Monitoring unit, whether the running status that is used to monitor described network processing unit is normal;
Reset instruction generation and transmitting element are used for generating reset instruction, and sending it to described network processing unit when monitoring unit finds that the network processing unit running status is undesired.
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| CN101982949A (en) * | 2010-11-04 | 2011-03-02 | 杭州东信北邮信息技术有限公司 | Detection system of intelligent network equipment and method |
| CN101374096B (en) * | 2008-10-22 | 2011-05-18 | 清华大学 | Virtual concurrent internet architecture |
| CN101355515B (en) * | 2008-09-05 | 2011-06-22 | 中兴通讯股份有限公司 | Method for restarting link aggregation control protocol with elegance |
| CN102291248A (en) * | 2010-06-18 | 2011-12-21 | 中兴通讯股份有限公司 | Method and device for realizing self recovery of system |
| CN102750192A (en) * | 2012-06-06 | 2012-10-24 | 杭州华三通信技术有限公司 | Method and device for data plane anomaly detection |
| CN107943603A (en) * | 2016-10-13 | 2018-04-20 | 迈普通信技术股份有限公司 | A kind of method for detecting operation state, detection circuit and electronic equipment |
| CN108449200A (en) * | 2018-02-02 | 2018-08-24 | 云宏信息科技股份有限公司 | A kind of mask information wiring method and device based on control node |
| CN110825015A (en) * | 2018-08-07 | 2020-02-21 | 中烟机械技术中心有限责任公司 | Method and system for recovering data communication between human-computer interface and PLC (programmable logic controller) |
| CN113010349A (en) * | 2021-02-23 | 2021-06-22 | 上海中船船舶设计技术国家工程研究中心有限公司 | Soft reset method and system for Ethernet switch |
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| CN101355515B (en) * | 2008-09-05 | 2011-06-22 | 中兴通讯股份有限公司 | Method for restarting link aggregation control protocol with elegance |
| CN101374096B (en) * | 2008-10-22 | 2011-05-18 | 清华大学 | Virtual concurrent internet architecture |
| CN102291248A (en) * | 2010-06-18 | 2011-12-21 | 中兴通讯股份有限公司 | Method and device for realizing self recovery of system |
| CN101982949A (en) * | 2010-11-04 | 2011-03-02 | 杭州东信北邮信息技术有限公司 | Detection system of intelligent network equipment and method |
| CN101982949B (en) * | 2010-11-04 | 2012-08-22 | 杭州东信北邮信息技术有限公司 | Detection system of intelligent network equipment and method |
| CN102750192A (en) * | 2012-06-06 | 2012-10-24 | 杭州华三通信技术有限公司 | Method and device for data plane anomaly detection |
| CN107943603A (en) * | 2016-10-13 | 2018-04-20 | 迈普通信技术股份有限公司 | A kind of method for detecting operation state, detection circuit and electronic equipment |
| CN108449200A (en) * | 2018-02-02 | 2018-08-24 | 云宏信息科技股份有限公司 | A kind of mask information wiring method and device based on control node |
| CN110825015A (en) * | 2018-08-07 | 2020-02-21 | 中烟机械技术中心有限责任公司 | Method and system for recovering data communication between human-computer interface and PLC (programmable logic controller) |
| CN110825015B (en) * | 2018-08-07 | 2023-09-26 | 中烟机械技术中心有限责任公司 | Method and system for recovering data communication between human-computer interface and PLC controller |
| CN113010349A (en) * | 2021-02-23 | 2021-06-22 | 上海中船船舶设计技术国家工程研究中心有限公司 | Soft reset method and system for Ethernet switch |
| CN113236329A (en) * | 2021-05-20 | 2021-08-10 | 三一智矿科技有限公司 | Electro-hydraulic support controller and fault recovery method of electro-hydraulic support controller |
| CN113236329B (en) * | 2021-05-20 | 2024-02-20 | 三一智矿科技有限公司 | Electrohydraulic bracket controller and fault recovery method thereof |
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Open date: 20071003 |