CN101478421B - OAM packet timing processing system and method - Google Patents
OAM packet timing processing system and method Download PDFInfo
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- CN101478421B CN101478421B CN2008102182738A CN200810218273A CN101478421B CN 101478421 B CN101478421 B CN 101478421B CN 2008102182738 A CN2008102182738 A CN 2008102182738A CN 200810218273 A CN200810218273 A CN 200810218273A CN 101478421 B CN101478421 B CN 101478421B
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Abstract
The invention discloses a system for processing operation and maintenance (OAM) message on a regular basis and a method thereof for sending, receiving and detecting OAM messages. The system comprises a CPU module for creating a dispatch queue list and a detection queue list of OAM messages, a memory module for storing the dispatch queue list and the detection queue list of the OAM messages, and a network processer module for sending and detecting the OAM messages on a regular basis, respectively. The method comprises the following steps: the CPU module writes an OAM template message into the network processor module; and the network processor module reads the OAM messages according to the address information in the OAM template message, sends or detects the OAM messages, and sends an alarming signal to the CPU module according to the detection result. The system and the method carry out the dispatch/detection of messages through the network processor on a regular basis, so as to reduce the load of the CPU, realize the dispatch/detection of messages on a regular basis by using the traffic shaping function of the network processer module, and support mixed dispatch/detection of multiple types of OAM messages with multiple cycles.
Description
Technical field
The present invention relates to the network communications technology, relate in particular to a kind of OAM packet timing processing system and method.
Background technology
Along with the release of Carrier-class Ethernet technology, carrier class OAM (Operation, Administration, Maintenance Operations, Administration and Maintenance) is more and more important.Exist numerous OAM agreements at present, as CFM (IEEE P802.1ag, Connectivity Fault Management), TMPLS OAM etc. needs timed sending OAM message, regularly detects the OAM message of whether receiving that the opposite end sends.Send the minimum 3.3ms of cycle request, allow cpu cycle send and detection messages when having a plurality of protection example, cpu load is very big, or even infeasible.
In order to address the above problem, the present invention proposes a kind of method that realizes various OAM message Timing Processing in conjunction with network processing unit.
Summary of the invention
The invention provides a kind ofly, realize the timed sending of various OAM messages and regularly detect by the OAM packet timing processing system and the method for CPU in conjunction with network processing unit.
The invention discloses a kind of OAM packet timing processing system, be used for sending, receive, detect the OAM message; Comprise: set up the transmit queue table of OAM message and the CPU module of detection queue table, deposit the memory module of OAM message and described transmit queue table and detection queue table, and the network processor module of difference timed sending and detection OAM message;
Described CPU module writes the OAM template message to described network processor module; Described network processor module reads the OAM message according to the address information in the described OAM template message and sends or detect, and sends alarm signal according to testing result to described CPU module.
In an embodiment of the present invention, also comprise following subordinate technical characterictic:
Described network processor module has traffic shaping function, the flow that the setting traffic shaping parameter makes the per second kind send on winding mouth Interface A is N*M*1000/Tmin, wherein N is described transmit queue table or the length that detects queue table, M is the byte number of template message, Tmin is that the minimum message in described transmission or the detection queue table sends the cycle, and flux unit is byte/s; Described network processor module mails to winding mouth Interface A with described OAM template message, and described OAM template message sends or detects when entering described network processor module again after by the internal loopback passage.
Perhaps, described transmit queue table with detect the corresponding different winding number of times of each different transmission or sense cycle in the tabulation; Have winding count value Loop_count field in the described template message, be used for described transmit queue table and detect the winding counting that each of tabulating is waited outstanding message; When the described described winding counting that waits outstanding message reached described winding number of times, described network processor module sent or detects outstanding messages such as described.
In one embodiment of the invention, described network processor module is searched message information and the transmission cycle thereof that needs send in the described transmit queue table according to formation designator in the described OAM template message and template message address information, and judge whether that according to described winding count value Loop_Count needs send, need to send and then duplicate a template message, and send to corresponding outbound port after revising message according to transmission information on its basis.
In another embodiment of the present invention, described network processor module is searched described detection queue table according to the formation designator in the described OAM template message and template message address information and is obtained packet counting information and sense cycle thereof, and judge whether that according to described winding count value Loop_Count needs detect, need to detect then and see according to various OAM standards whether needs are alarmed, need alarm then duplicate a template message, and fill in corresponding alarm type according to packet counting information on its basis and send a warning message to described CPU module.
The invention discloses a kind of OAM message Timing Processing method, be used for sending, receive, detect the OAM message; Comprise the steps:
Steps A, CPU module are set up OAM message, the transmit queue table that needs processing and are detected tabulation in memory module;
Step B, described CPU module write to network processor module and send and detect the OAM template message;
Step C, described network processor module write template according to the address information in the described OAM template message reads the needs processing from described memory module OAM message, simultaneously the OAM message of waiting for processing are down together pointed in the address in the template message;
Step D, described network processing unit timed sending or detect the described OAM message of need handling;
Circulation execution in step C and step D are sky until described transmit queue table and detection to tabulation.
In an embodiment of the present invention, described step D further comprises the steps:
Step D11, described network processor module preestablish the flow that traffic shaping parameter makes send each second on winding mouth InterfaceA be N*M*1000/Tmin, wherein N is described transmit queue table or the length that detects queue table, M is the byte number of template message, Tmin is that the minimum message in described transmission or the detection queue table sends the cycle, and flux unit is byte/s;
Step D12, described network processor module mail to winding mouth InterfaceA with described OAM template message, and described OAM template message sends or detects when entering described network processor module again after by the internal loopback passage.
In another embodiment of the present invention, described transmit queue table with detect the corresponding different winding number of times of each different transmission or sense cycle in the tabulation; Described step D further comprises the steps:
Step D21, described network processor module described transmit queue table and detect in the tabulation each etc. outstanding message carry out the winding counting during at winding each time;
Step D22, described network processor module judge whether the described winding counting of each outstanding message such as described reaches described winding number of times, are then to send or detect outstanding messages such as described.
In one embodiment of the invention, described step C comprises: described network processor module finds the message information that needs send in the described transmit queue table according to the formation designator in the described OAM template message and template message address information, and adds in a template message of duplicating and re-send to corresponding outbound port.
In another embodiment of the present invention, described step C comprises: described network processor module is searched the message information that described detection queue table obtains the needs detection according to formation designator in the described OAM template message and template message address information, see according to various OAM standards whether needs are alarmed again, need alarm then duplicate a template message, and fill in corresponding alarm type according to packet counting information on its basis and send a warning message to described CPU module.
The present invention realizes the timed sending of various OAM messages and regularly detection in conjunction with CPU module and network processor module, makes the minimum transmission cycle of carrier class OAM become possibility.The present invention also utilizes traffic shaping (shaper) function of network processor module to realize regularly giving out a contract for a project and detecting.The present invention carries out the frequency division processing by increase formation winding count value in template message, realizes that multiply periodic OAM message mixes transmission in the formation.
Description of drawings
Fig. 1 is an OAM packet timing processing system block diagram.
Fig. 2 is an OAM message template style schematic diagram.
Fig. 3 is an OAM message transmit queue hoist pennants.
Fig. 4 detects the queue table schematic diagram for the OAM message.
Fig. 5 is timed sending/timing detection procedure.
Embodiment
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is further described.
Be a kind of embodiment of OAM packet timing processing system as shown in Figure 1, comprise this end system and the peer-to-peer system that send and receive the OAM message; This end system is included as the CPU module that network processing unit provides parameter configuration, and network processor module also sends alarm signal to CPU; And the memory module that is connected with network processing unit; Wherein CPU is responsible for setting up OAM message transmission/detection queue table, and the write memory of transmission/detection OAM message template and relevant parameter, CPU by network processing unit to the memory write table; Memory is used to deposit OAM message queue table; Network processing unit is used for that the OAM message is carried out timed sending/detection to be handled.
Be illustrated in figure 2 as OAM message template style schematic diagram, the masterplate message identifier among the figure is to be used in the inner indication of network processing unit, and this is an OAM transmission/detection masterplate message.Queue identifier among the figure is used for determining which formation to search message in when sign transmission/detection.The corresponding one-period value of general each formation is divided into 3.3ms, 10ms as the 802.1ag agreement regulation CFM message transmission cycle, 100ms, 1s, 10s, 1min, 7 grades of 10min (the transmission cycle of most of OAM agreements also is these 7 grades) just need 7 formations.Address among the figure is the address of the concrete list item of inner queue.Common field among the figure is meant the public field of some various OAM messages, as mac address of this equipment etc.Be placed on the structure of OAM message when making things convenient for timed sending herein, also save the field of queue table.Reserved field among the figure is used for inserting herein message content when sending the OAM message.
Be illustrated in figure 3 as OAM message transmit queue hoist pennants, the type of message among the figure is to be used to illustrate the OAM type of message.Common OAM message has CFM, TMPLS OAM, MPLS OAM, Ether-OAM, APS etc.Message content among the figure is meant that this OAM message has field by oneself.Other information among the figure or information index are non-message field (MFLD)s, but when sending, need formulate as outbound port information, next hop information (or index), this can be provided with according to the needs that concrete OAM message is transmitted.
Be illustrated in figure 4 as the OAM message and detect the queue table schematic diagram, the type of message among the figure is used to illustrate the OAM type of message.Common OAM message has CFM, TMPLS OAM, MPLS OAM, Ether-OAM, APS etc.Count information among the figure is recorded in the OAM message of receiving in the sense cycle that what opposite ends send over for the own field of OAM message as common needs, receives how many individual wrong OAM messages (time does not match, ID do not match etc.) etc.Other information indexs among the figure are meant non-message field (MFLD), but the information that need further search when detecting, are provided with according to the needs of concrete OAM.
Be that a kind of CPU of use carries out timed sending and the flow chart that regularly detects the OAM message in conjunction with network processing unit as shown in Figure 5, specify as follows:
Step 1, CPU set up transmission/detection OAM message queue table.
Wherein the transmit queue table comprises type of message, message content (parameter), fields (referring to Fig. 3) such as other information or information index; Detect queue table and comprise type of message, count information, fields (referring to Fig. 4) such as other information or information index.
Type of message is used to illustrate the type of OAM message, and common OAM message has CFM, TMPLSOAM, MPLSOAM, Ether-OAM, APS etc.;
Message content is the own field of OAM message, the detailed content of record OAM message;
Count information is recorded in the OAM message of receiving in the sense cycle that what opposite ends send over for the own field of OAM message as common needs, receives how many individual wrong OAM messages (time does not match, ID do not match etc.) etc.;
Other information indexs are not message field (MFLD), but when sending, need formulate as outbound port information, next hop information (or index), or the information that when detecting, need further search, the needs of transmitting according to concrete OAM message are provided with.
OAM message queue table is kept in the memory, and each OAM message that needs to send/detect all is stored in the queue table.
Step 2, CPU write the OAM template message to network processing unit, and as Fig. 5, template message comprises fields such as template message identifier, queue identifier, address, common field, reservation.
The template message identifier is used in the inner indication of network processing unit, illustrates that this is that an OAM sends template message or an OAM detects template message;
When being used for sign transmission/detection, queue identifier which formation to search message in, the corresponding one-period value of general each formation, be divided into 3.3ms as the 802.1ag agreement regulation CFM message transmission cycle, 10ms, 100ms, 1s, 10s, 1min, 10min7 grade (the transmission cycle of most of OAM agreements also is these 7 grades) just needs 7 formations;
Address field is used for the address of the inner concrete list item of record queue;
Common field is used to write down the public field of some various OAM messages, as mac address of this equipment etc., is placed on the structure of OAM message when making things convenient for timed sending herein, also saves the field of queue table;
When being used to send the OAM message, reserved field inserts message content herein.
After step 3, network processing unit were received template message, discerning this template message according to the identifier on the template message was to send template message or detection template message.Send template message and forward step 4 to, detect template message and forward step 5 to.
Step 4, network processing unit are searched message information and the transmission cycle that the transmit queue table obtains the needs transmission according to formation designator and template message address information.Judge whether that according to the winding count value Loop_Count in transmission cycle and the template message needs send, do not need to send and then leap to step 6.Need to send and then duplicate a template message, and revise message and send to corresponding outbound port according to transmission information on its basis, jump to step 6.
Step 5 is searched according to formation designator and template message address information and to be detected queue table and obtain packet counting information and sense cycle.Judge whether that according to the winding count value Loop_Count in sense cycle and the template message needs detect, do not need to send and then leap to step 6.Need to detect then to see according to various OAM standards whether needs are alarmed, and need alarm then duplicate a template message, and fill in corresponding alarm type according to packet counting information on its basis and alarm.Jump to step 6.
Step 6 judges whether to arrive the formation afterbody according to the address information in the template message, does not arrive the formation afterbody, and the template message address information adds 1, turns to step 8; It is clear 0 with the template message address information to arrive afterbody, jumps to step 7.
Step 7 adds 1 with each frequency division counter value Loop_count in the template message, and judges whether to arrive frequency division value, arrives then with the Loop_count of correspondence clear 0.
Step 8 mails to the winding mouth with template message, and the traffic shaping parameter of winding mouth is good as calculated, and making time t interior is the byte number of N template message by winding mouth byte number.Wherein t is minimum OAM transmission/sense cycle, and N is a queue length.
The technical solution adopted in the present invention: CPU is responsible for the parameter configuration of various OAM messages, and with type of message, message content writes the transmit queue table that mates with the transmission cycle and detects in the queue table.
CPU is responsible for writing 2 parts of template message to network processing unit simultaneously, and portion is that the template message of timed sending OAM message, portion are the triggering message that regularly detects.As long as have effective message in the OAM message queue, and OAM(Operation Administration Maintenance) enables, and these 2 template message just are stored in network processing unit inside always.
When timing arrives, trigger template message and enter network processor engine and send or detect processing.
Some network processing unit self does not have timer, can't realize that timing is given out a contract for a project, measuring ability.At this situation, the present invention has provided a kind of method of utilizing traffic shaping (shaper) to realize timer.
Concrete summary of the invention comprises the following aspects:
(1) CPU handles
1, CPU sets up the OAM queue table, and queue table is kept in the memory, and each needs the OAM message that sends/detect, is stored in the queue table.
2, different OAM messages is placed in the different formations cycle, also can only be placed in the formation.When the cycle, different OAM messages was placed in the same formation, needs to add cycle information in each element of formation, and will add winding count value Loop_count field in the template message.
When 3, adding an OAM message that needs to send/detects, only newly-established OAM type of message and content need be write in transmissions/detection queue table and got final product, in formation, delete again when deleting the OAM message and get final product.
4, CPU writes template message to network processing unit, and adds winding count value Loop_count field as required in template message.
(2) network processing unit timed sending OAM message
1, network processing unit is searched the OAM message information according to sending the address information of carrying in the template message in OAM message queue table, and duplicates a template message, and structure OAM message sends to corresponding output port on the basis of the template message of duplicating.Outbound port information can write in the queue table, also can obtain from other tables, decides on concrete OAM message forwarding flow scheme design.
2, revise the address information of duplicating in the preceding template message, finding key value when sending as next OAM message.
3, the timing setting of each formation: t=period T/queue length N at interval gives out a contract for a project.
When all transmission/the sense cycle of OAM message was identical in the formation, period T was the transmission/sense cycle of arbitrary OAM message in the OAM message queue table; When having the OAM message of different transmission/sense cycle in the OAM message queue table, period T is OAM transmission/sense cycle minimum in the OAM message queue table.
(3) network processing unit regularly detects the OAM message:
1, network processing unit is searched the detection queue table according to the address information that regularly detects in the template message.According to detecting type of message in the queue table, whether need alarm (relevant) with concrete OAM consensus standard with OAM message number or the error message record case decision that the opposite end of record in the table sends.
Duplicate a template message when 2, needing alarm, and on the template message basis, add warning information, transmitted to CPU, CPU identification alarm type also carries out respective handling.
(4) utilize traffic shaping (shaper) to realize regularly giving out a contract for a project and detecting.
Some network processing unit self does not have timer, can't realize that timing is given out a contract for a project, measuring ability, if network processing unit has the traffic shaping of utilization (shaper) function, then can realize regularly giving out a contract for a project and detecting with following method.
Step 1, on the winding mouth of network processing unit (hereinafter referred to as Interface A) play traffic shaping (shaper) function, according to maximum OAM example N, template message length M byte, the OAM message minimum of the support of this equipment needs interval T ms that gives out a contract for a project, determine the shaper parameter by calculating, the flow that makes send from Interface A each second is N*M*1000/T byte/s.
Step 2, when OAM(Operation Administration Maintenance) enables, CPU sends an OAM template message to network processing unit.
Step 3, network processing unit mail to winding mouth Interface A with template message, and the address information in the template message is added 1, if the address has arrived the formation afterbody, then the address are composed into initial address 0.
Step 4, send to the template message of winding mouth Interface A, through behind the traffic shaping of shaper, a period of time of can delaying time continues to enter the network processing unit porch by the internal loopback passage, continues step 3.
Step 5, when OAM(Operation Administration Maintenance) goes to enable, network processing unit abandons template message and gets final product.
According to said method, before OAM(Operation Administration Maintenance) went to enable, template message was always in the network processing unit internal loopback, and every loopback cycle once is T/N ms, the time that travels through complete formation is T ms, has also just reached the purpose that each OAM example minimum can every Tms sends a message.
(5) realization of many timers
Different OAM message of transmission cycle can be placed in the different at interval formation of giving out a contract for a project, if number of queues is restricted in actual the use, can carry out the frequency division processing by in template message, increasing formation winding count value field Loop_Count_M, in the element of formation, write the transmission cycle information simultaneously.Concrete grammar is as follows:
Step 1, when template message arrives the formation afterbody, with all Loop_Count field+1, judging whether simultaneously needs clear 0.
For example need support simultaneously in a formation that the transmission cycle is 3.3ms, 10ms, the OAM message of 100ms, queue length is N, formation then is set gives out a contract for a project and be spaced apart 3.3/N ms.Loop_Count_10ms and Loop_Count_100ms field are set in the template message.When template message arrives the formation afterbody, Loop_Count_10ms and Loop_Count_100ms add 1 respectively, if the LoopCount_10ms value is 2 (10ms/3.33ms-1) then Loop_Count_10ms is clear 0, if the Loop_Count_100ms value is 29 (100ms/3.33ms-1) then with Loop_Count_10ms clear 0.
During N element in formation of step 2, template message winding, take out and send cycle information T.As T=10ms, judge then whether Loop_Count_10ms is 2, if 2 OAM messages that need to send this element, otherwise do not send, loopback continued.
So just can realize that multiply periodic OAM message mixing has sent in the formation.
Claims (10)
1. an OAM packet timing processing system is used for sending, receives and detects the OAM message; It is characterized in that:
Comprise: set up the transmit queue table of OAM message and the CPU module of detection queue table, deposit the memory module of OAM message and described transmit queue table and detection queue table, and the network processor module of difference timed sending and detection OAM message;
Described CPU module writes the OAM template message to described network processor module; Described network processor module reads the OAM message according to the address information in the described OAM template message, sends or detect described message, and sends alarm signal according to testing result to described CPU module.
2. system according to claim 1 is characterized in that:
Described network processor module has traffic shaping function, set traffic shaping parameter and make that the flow that sends is N*M*1000/Tmin on winding mouth Interface A, wherein N is described transmit queue table or the length that detects queue table, M is the byte number of template message, Tmin is that the minimum message in described transmission or the detection queue table sends the cycle, the unit of Tmin is ms, and flux unit is byte/s;
Described network processor module mails to winding mouth Interface A with described OAM template message, and described OAM template message sends or detects when entering described network processor module again after by the internal loopback passage.
3. system according to claim 1 is characterized in that:
Described transmit queue table with detect queue table in each different transmission or the corresponding different winding number of times of sense cycle;
Have winding count value Loop_count field in the described template message, each that is used for described transmit queue table and detection queue table waits the winding counting of outstanding message;
When the described described winding counting that waits outstanding message reached described winding number of times, described network processor module sent or detects outstanding messages such as described.
4. system according to claim 3 is characterized in that:
Described network processor module is searched message information and the transmission cycle thereof that needs send in the described transmit queue table according to formation designator in the described OAM template message and template message address information, and judge whether that according to described winding count value Loop_Count needs send, need to send and then duplicate a template message, and send to corresponding outbound port after revising message according to transmission information on its basis.
5. system according to claim 3 is characterized in that:
Described network processor module is searched described detection queue table according to the formation designator in the described OAM template message and template message address information and is obtained packet counting information and sense cycle thereof, and judge whether that according to described winding count value Loop_Count needs detect, need to detect then and see according to various OAM standards whether needs are alarmed, need alarm then duplicate a template message, and fill in corresponding alarm type according to packet counting information on its basis and send a warning message to described CPU module.
6. an OAM message Timing Processing method is used for sending, receives and detects the OAM message; It is characterized in that, comprise the steps:
Steps A, CPU module are set up in memory module to be needed OAM message, the transmit queue table of handling and detects queue table;
Step B, described CPU module write to network processor module and send the OAM template message and detect the OAM template message;
Step C, described network processor module write template according to the address information in the described OAM template message reads the needs processing from described memory module OAM message, simultaneously the OAM message of waiting for processing are down together pointed in the address in the template message;
Step D, described network processing unit timed sending or detect the described OAM message of need handling;
Circulation execution in step C and step D are empty until described transmit queue table and detection queue table.
7. method according to claim 6 is characterized in that described step D further comprises the steps:
Step D11, described network processor module preestablish traffic shaping parameter and make that the flow that sends is N*M*1000/Tmin on winding mouth Interface A, wherein N is described transmit queue table or the length that detects queue table, M is the byte number of template message, Tmin is that the minimum message in described transmission or the detection queue table sends the cycle, the unit of Tmin is ms, and flux unit is byte/s;
Step D12, described network processor module mail to winding mouth InterfaceA with described OAM template message, and described OAM template message sends or detects when entering described network processor module again after by the internal loopback passage.
8. method according to claim 6 is characterized in that, described transmit queue table with detect queue table in each different transmission or the corresponding different winding number of times of sense cycle; Described step D further comprises the steps:
Step D21, described network processor module described transmit queue table and detect in the queue table each etc. outstanding message carry out the winding counting during at winding each time;
Step D22, described network processor module judge whether the described winding counting of each outstanding message such as described reaches described winding number of times, are then to send or detect outstanding messages such as described.
9. according to claim 7 or 8 described methods, it is characterized in that:
Described step C comprises: described network processor module finds the message information that needs send in the described transmit queue table according to the formation designator in the described OAM template message and template message address information, and adds in a template message of duplicating and re-send to corresponding outbound port.
10. according to claim 7 or 8 described methods, it is characterized in that:
Described step C comprises: described network processor module is searched the message information that described detection queue table obtains the needs detection according to formation designator in the described OAM template message and template message address information, see according to various OAM standards whether needs are alarmed again, need alarm then duplicate a template message, and fill in corresponding alarm type according to packet counting information on its basis and send a warning message to described CPU module.
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| CN101848223B (en) * | 2010-05-25 | 2014-08-13 | 中兴通讯股份有限公司 | Network processor-based method and device for realizing quick bidirectional forwarding detection of messages |
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| CN102014069A (en) * | 2010-12-16 | 2011-04-13 | 中兴通讯股份有限公司 | Method and device for transmitting message |
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| CN103580886B (en) * | 2012-07-25 | 2017-10-27 | 中兴通讯股份有限公司 | Grouping conveying network pretection switch apparatus and method |
| CN104980293B (en) * | 2014-04-02 | 2019-05-31 | 深圳市中兴微电子技术有限公司 | A kind of OAM message is quickly sent and the method and device of detection processing |
| CN105827444B (en) * | 2016-03-15 | 2018-12-11 | 烽火通信科技股份有限公司 | A kind of method that hardware based VC OAM alarm is quickly handled |
| CN107517117B (en) * | 2016-06-17 | 2022-04-08 | 深圳市中兴通讯技术服务有限责任公司 | IP layer OAM (operation administration and maintenance) alarm method and device and network node |
| CN111988158B (en) * | 2019-05-23 | 2023-04-18 | 北京物芯科技有限责任公司 | Chip-level OAM message sending method, device, system and storage medium |
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