CN102185764B - Method and device for receiving and processing OAM (operation, administration and maintenance) messages in link layer and switch - Google Patents
Method and device for receiving and processing OAM (operation, administration and maintenance) messages in link layer and switch Download PDFInfo
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Abstract
The invention provides a method and device for receiving and processing OAM (operation, administration and maintenance) messages in a link layer and a switch, and is used for solving the problems that an existing receiving and processing technology of OAM messages in a link layer occupies large space and is complicated in operations. The method comprises the following steps: determining the type of a first port after the first port receives the OAM messages; when the first port is a non-link aggregation port, acquiring a first OAM attribute related to the first port in accordance with the prestored first port, and then forwarding the OAM messages and carrying out state detection on the OAM messages in accordance with the first OAM attribute; and when the first port is a link aggregation port, acquiring a second OAM attribute related to the first port in accordance with a prestored second port, and then forwarding the OAM messages and carrying out the state detection on the OAM messages in accordance with the second OAM attribute. According to the technical scheme, the memory space is saved and the operations to acquire the OAM attributes are simple.
Description
Technical field
The present invention relates to communication technical field, particularly the receiving handling method of link layer operation management maintenance OAM message, device and switch.
Background technology
Along with the development of network technology, OAM (operation, administration and maintenance, Operations, Administration and Maintenance) more and more important, numerous OAM agreements of current existence, as CFM (Connectivity Fault Management, connect fault management), MPLS (Multi-Protocol LabelSwitching, multiprotocol label switching)-TP OAM etc. have support link layer detect function.
Usually, a network equipment (as switch) has one or more line card, each line card there is one or more port, wherein, some ports do not add link aggregation (being called non-link polymerization terminal port), and some ports add link aggregation (being called link polymerization terminal port).Multiple link polymerization terminal port polymerization is abstracted into a logic port, and corresponding formation one logical links, the bandwidth of this logical links is the bandwidth sum of each physical link.Link aggregation can bundle any relevant link polymerization terminal port, and these link polymerization terminal ports can be distributed in different line card.
In prior art, binding O AM detection example on port is needed to carry out packet receiving detection to link layer OAM, to judge that whether antenna efficiency is normal.Such as after the port A of switch receives an OAM message, first obtain the relevant OAM attribute (pre-configured) of port A, the OAM attribute that port A is correlated with comprises the port A whether forwarding receiving port number of OAM message that is forwarded of the OAM maintenance information of enable, the port A of OAM and reception; Then relevant according to port A OAM attribute carries out OAM forwarding and state detection process, is transmitted to forwarding receiving port by OAM message, then according to forwarding OAM message that receiving port receives and OAM maintenance information compares, judges that whether antenna efficiency is normal.
In prior art, the OAM attribute field that port is relevant is stored in a large table, and the numbering of port place line card and the port numbers of this port on line card need be utilized to search this large table, to obtain the relevant OAM attribute of port.If employing linear search technique, considerably increases memory space, the power side multiple that memory space can present 2 along with the increase of line card number increases, far beyond frame link aggregation example demand; And if adopt nonlinear method, as hash algorithm or binary tree, then greatly can increase the complexity of microcode execution, especially for the network processing unit that the instruction space is at full stretch, the complexity of microcode execution is higher.
Summary of the invention
Embodiments provide the receiving handling method of link layer operation management maintenance OAM message, device and switch, the reception treatment technology in order to solve existing link layer OAM message takies the problem that memory space is large, operation is more complicated.
Embodiments provide a kind of receiving handling method of link layer operation management maintenance OAM message, it is characterized in that, comprising:
After the first port receives OAM message, determine the type of described first port;
When described first port is non-link polymerization terminal port, the relevant OAM attribute of described first port is obtained according to the first end oral thermometer preserved in advance, and carrying out OAM forwarding and state detection process according to a described OAM attribute, described first end oral thermometer records the OAM attribute field of all non-link polymerization terminal ports on described first port place line card;
When described first port is link polymerization terminal port, the 2nd relevant OAM attribute of described first port is obtained according to the second port table preserved in advance, and carrying out OAM forwarding and state detection process according to described 2nd OAM attribute, described second port table records the OAM attribute field of all link polymerization terminal ports on described first port place line card.
Described after the first port receives OAM message, determine the type of described first port, be specially:
After described first port receives OAM message, determine the type of described first port according to the total port table preserved in advance, described total port table records the type information of all of the port on described first port place line card.
Described total port table is by the respective port numbers of all of the port on described first port place line card and type code corresponding record;
Described first end oral thermometer is by the respective port numbers of all non-link polymerization terminal ports on described first port place line card and OAM attribute field corresponding record.
Described second port table is by the respective mark of all link aggregation examples and OAM attribute field corresponding record.
Described when described first port is link polymerization terminal port, obtain the 2nd relevant OAM attribute of described first port according to the second port table preserved in advance, be specially:
When described first port is link polymerization terminal port, obtain key assignments, described key assignments is the mark of the link aggregation example configured on described first port;
According to described key-value pair, the second port table is searched, to obtain the 2nd relevant OAM attribute of described first port.
Described total port table also records the mark of the link aggregation example of each self-configuring on all link polymerization terminal ports on described first port place line card.
The first end oral thermometer that described basis is preserved in advance obtains the relevant OAM attribute of described first port, and carries out OAM forwarding and state detection process according to a described OAM attribute, is specially:
From described first end oral thermometer, obtain an OAM attribute field of described first port, a described OAM attribute field comprises the index field that an OAM enable field, first forwards receiving port number and an OAM maintenance information table;
When a described OAM enable field represents not enable, abandon described OAM message, determine that link layer oam state is for abnormal;
When a described OAM enable field represents enable, described OAM message is forwarded to described first and forwards receiving port; Index field according to a described OAM maintenance information table obtains the described OAM maintenance information table preserved in advance, from a described OAM maintenance information table, obtain an OAM maintenance information; The OAM message received according to described first forwarding receiving port and a described OAM maintenance information, judge link layer oam state.
Embodiments provide a kind of receiving and processing device of link layer OAM message, comprising:
Memory, for storing first end oral thermometer and the second port table, wherein, described first end oral thermometer records the OAM attribute field of all non-link polymerization terminal ports on described first port place line card, and described second port table records the OAM attribute field of all link polymerization terminal ports on described first port place line card;
Determination type module, for after the first port receives OAM message, determines the type of described first port;
First acquisition module, for when described first port is non-link polymerization terminal port, obtains the relevant OAM attribute of described first port according to described first end oral thermometer;
Second acquisition module, for when described first port is link polymerization terminal port, obtains the 2nd relevant OAM attribute of described first port according to described second port table;
Check processing module, for carrying out OAM forwarding and state detection process according to a described OAM attribute or the 2nd OAM attribute.
Described memory, also have total port table of the type information of all of the port on the line card of described first end mouth place for stored record, described total port table is for determining the type of described first port.
Described second acquisition module comprises:
Key assignments obtains submodule, for when described first port be link polymerization terminal port, described second port table by the respective mark of all link aggregation examples and OAM attribute field corresponding record time, obtain key assignments, described key assignments is the mark of the link aggregation example configured on described first port;
Search submodule, search for the second port table according to described key-value pair, to obtain the 2nd relevant OAM attribute of described first port.
Embodiments provide a kind of switch, comprise described receiving and processing device.
In the technical scheme that the embodiment of the present invention provides, obtain OAM attribute and be divided into three steps, first the port type receiving OAM message is judged; If this port is non-link polymerization terminal port, then obtain the relevant OAM attribute of this port according to first end oral thermometer, if this port is link polymerization terminal port, then obtain the relevant OAM attribute of this port according to the second port table; After obtaining OAM attribute, carry out OAM forwarding and state detection process according to OAM attribute.Compared with prior art, the method has saved memory space, obtains the simple to operate of OAM attribute, also improves extensibility and can versatility simultaneously.
Accompanying drawing explanation
Fig. 1 is the flow chart of the receiving handling method of embodiment of the present invention link layer OAM message;
Fig. 2 is the embodiment flow chart of step S102 in the embodiment of the present invention;
Fig. 3 is the structural representation of the receiving and processing device of embodiment of the present invention link layer OAM message;
Fig. 4 is the structural representation of the second acquisition module in Fig. 3.
Embodiment
For the embodiment of the present invention will be solved technical problem, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, embodiments provide a kind of receiving handling method of link layer OAM message, comprise the following steps:
S101, after the first port receives OAM message, determine the type of the first port.
Particularly, after the first port receives OAM message, can determine the type of the first port according to the total port table preserved in advance, total port table records the type information of all of the port on the first port place line card.
Wherein, total port table can by the port numbers separately of all of the port on the first port place line card and type code corresponding record, and all of the port port numbers is separately different.The list item entry number of total port table equals the port number of the first port place line card support.
The port numbers of each port can represent with local end slogan, and such as a line card always has 48 ports, then these ten numerals of available 1-48 or 48 binary numbers are numbered respectively for these 48 ports.Type code can be set to 1 or 0, and 1 represents that port adds link aggregation, is link polymerization terminal port; 0 represents that port does not add link aggregation, is non-link polymerization terminal port.
S102, when the first port is non-link polymerization terminal port, the relevant OAM attribute of the first port is obtained according to the first end oral thermometer preserved in advance, and carrying out OAM forwarding and state detection process according to an OAM attribute, first end oral thermometer records the OAM attribute field of all non-link polymerization terminal ports on the first port place line card.
Wherein, first end oral thermometer can by the port numbers separately of all non-link polymerization terminal ports on the first port place line card and OAM attribute field corresponding record, and all non-link polymerization terminal ports port numbers is separately different.
The port numbers of each non-link polymerization terminal port can represent with local port number.
OAM attribute field comprises OAM enable field, forwards the index field of receiving port number and OAM maintenance information table.OAM enable field can be set to 1 or 0, and 1 is enable, represents this port binding OAM detection example; 0 is not enable, represents this port non-binding O AM detection example.Forward receiving port number and refer to the port numbering receiving the OAM message forwarded by the first port, available local end slogan represents.The index field of OAM maintenance information table is used for inquiring about OAM maintenance information table.First port and forwarding receiving port are all positioned on local device, and forwarding receiving port can be different from the first port place line card.
As shown in Figure 2, step S102 can be embodied as following steps:
S1021, from first end oral thermometer, obtain an OAM attribute field of the first port, an OAM attribute field comprises the index field that an OAM enable field, first forwards receiving port number and an OAM maintenance information table;
S1022, when an OAM enable field represents not enable, abandon OAM message, determine that link layer oam state is for abnormal;
When an OAM enable field represents enable, OAM message is forwarded to the first forwarding receiving port; Index field according to an OAM maintenance information table obtains the OAM maintenance information table preserved in advance, from an OAM maintenance information table, obtain an OAM maintenance information; The OAM message received according to the first forwarding receiving port and an OAM maintenance information, judge link layer oam state.
As inconsistent in the MEG id field in the MEG id field in OAM message and an OAM maintenance information, show to mix mutually from the Service Instance representated by frame and MEP self the MEG ID of different Service Instance, MEP detects that mistake is mixed into, this situation may be that error configurations causes, also may be hardware or software in network malfunctioning caused by, link layer oam state is that MEG ID is abnormal.Other link layer oam states are if unexpected MEP, the comparing class in unexpected cycle are like MEG ID.
Wherein, if link layer oam state changes (as produced abnormal or abnormal disappearance), then follow-up operation can be carried out, such as alarm display, link switching etc.; If link layer oam state does not change, then abandon OAM message.
S103, when the first port is link polymerization terminal port, the 2nd relevant OAM attribute of the first port is obtained according to the second port table preserved in advance, and carrying out OAM forwarding and state detection process according to the 2nd OAM attribute, the second port table records the OAM attribute field of all link polymerization terminal ports on the first port place line card.
The embodiment of step S103 can refer to above-mentioned steps S1021-S1022.
Wherein, the second port table can by all link aggregation examples mark separately and OAM attribute field corresponding record, and all link aggregation examples mark is separately different.Now, the second port table content corresponding to each line card is identical.The list item entry number of the second port table equals all link aggregation instance number of frame support.When the link aggregation example of such as frame support has 128, the mark of link aggregation example can use 7 bit fields to represent.
Now, obtain the 2nd relevant OAM attribute of the first port according to the second port table preserved in advance, can be embodied as:
Obtain key assignments, key assignments is the mark of the link aggregation example configured on the first port;
Search according to key-value pair second port table, to obtain the 2nd relevant OAM attribute of the first port.
Wherein, in order to save memory space and easy-to-look-up, key assignments can be stored in total port table, and namely total port table can also record the key assignments that on the first port place line card, all link polymerization terminal ports are corresponding.Now, total port table not only can by the port numbers separately of all of the port on the first port place line card and type code corresponding record, can also by the port numbers separately of all of the port on the first port place line card and key assignments corresponding record (when port be non-link polymerization terminal port, corresponding key assignments can be set to sky or represent the preset value not needing to search the second port table), the mode of record can have multiple, such as type code can be set to a field, key assignments is set to another field, also type code and key assignments can merge and be set to a field (when the link aggregation example of such as frame support has 128, in total port table, corresponding each port numbers arranges the critical field of 8 bits respectively, wherein the field of 1 bit is used for representing type code, the field of other 7 bits is used for representing key assignments).
The preservation address of above-mentioned first end oral thermometer and the second port table can not be overlapping, to avoid the OAM maintenance information mistake obtained.After the line card of frame, port increase, need to expand total port table, first end oral thermometer and the second port table, in view of these tables are linear list, its extensibility and can be universal all better.
In the receiving handling method of the link layer OAM message that the embodiment of the present invention provides, obtain OAM attribute and be divided into three steps, first the port type receiving OAM message is judged; If this port is non-link polymerization terminal port, then obtain the relevant OAM attribute of this port according to first end oral thermometer, if this port is link polymerization terminal port, then obtain the relevant OAM attribute of this port according to the second port table; After obtaining OAM attribute, carry out OAM forwarding and state detection process according to OAM attribute.Compared with prior art, the method has saved memory space, obtains the simple to operate of OAM attribute, also improves extensibility and can versatility simultaneously.
As a distributed system, frame has 10 line cards, and each line card port number is 48, and the link aggregation example of frame support is 128, and according to prior art, the list item entry that each line card needs is 48* (2 altogether
4)=768, be 7680 altogether for entry shared by whole frame 10 line cards, entry number is more, takies memory space large; If in order to reduce memory space, adopt nonlinear method, as hash algorithm or binary tree, then greatly can increase the complexity of microcode execution, especially for the network processing unit that the instruction space is at full stretch, the complexity of microcode execution is higher.
And the technical scheme adopting the embodiment of the present invention to provide, the list item entry of total port table that each line card is corresponding is 48, the list item entry of first end oral thermometer mostly is 48 most, the list item entry of the second port table is 128, the list item entry that each line card needs mostly is 224 most, mostly is 2240 most, compared with prior art for list item entry shared by whole frame 10 line cards, entry number is less, takies memory space little; When obtaining the relevant OAM attribute of a port, first search in total port table, recycling port numbers is searched at first end oral thermometer or utilizes key assignments corresponding to link aggregation instance port to search in the second port table, because of first end oral thermometer and the second port table be only find key value inconsistent, operation in code can merge, generally speaking only need carry out twice linear search, therefore search operation is simple.
Compared with prior art, the technical scheme that the embodiment of the present invention provides has saved memory space, obtains the simple to operate of OAM attribute.
As shown in Figure 3, the embodiment of the present invention additionally provides a kind of receiving and processing device of link layer OAM message, comprising:
Memory, for storing first end oral thermometer and the second port table, wherein, first end oral thermometer records the OAM attribute field of all non-link polymerization terminal ports on the first port place line card, and the second port table records the OAM attribute field of all link polymerization terminal ports on the first port place line card;
Determination type module, for after the first port receives OAM message, determines the type of the first port;
First acquisition module, for when the first port is non-link polymerization terminal port, obtains the relevant OAM attribute of the first port according to first end oral thermometer;
Second acquisition module, for when the first port is link polymerization terminal port, obtains the 2nd relevant OAM attribute of the first port according to the second port table;
Check processing module, for carrying out OAM forwarding and state detection process according to an OAM attribute or the 2nd OAM attribute.
Wherein, above-mentioned memory, also have total port table of the type information of all of the port on the first port place line card for stored record, this total port table is for determining the type of the first port.
As shown in Figure 4, the second acquisition module in Fig. 3 can also comprise:
Key assignments obtains submodule, for when the first port be link polymerization terminal port, the second port table by the respective mark of all link aggregation examples and OAM attribute field corresponding record time, obtain key assignments, key assignments is the mark of the link aggregation example configured on the first port;
Search submodule, for searching according to key-value pair second port table, to obtain the 2nd relevant OAM attribute of the first port.
In the receiving and processing device of the link layer OAM message that the embodiment of the present invention provides, obtain OAM attribute and be divided into three steps, first the port type receiving OAM message is judged; If this port is non-link polymerization terminal port, then obtain the relevant OAM attribute of this port according to first end oral thermometer, if this port is link polymerization terminal port, then obtain the relevant OAM attribute of this port according to the second port table; After obtaining OAM attribute, carry out OAM forwarding and state detection process according to OAM attribute.Compared with prior art, this device has saved memory space, obtains the simple to operate of OAM attribute, also improves extensibility and can versatility simultaneously.
The embodiment of the present invention also provides a kind of switch, comprises the receiving and processing device of above-mentioned link layer OAM message.Certainly, Other related equipment also can arrange the receiving and processing device of above-mentioned link layer OAM message.
One of ordinary skill in the art will appreciate that, the all or part of step realized in the method for the above-mentioned fact is that the hardware that can carry out instruction relevant by program has come, above-mentioned program can be stored in the storage medium that a computer can read, this program, when performing, comprises above-mentioned step.Above-mentioned storage medium can be ROM/RAM, disk, CD etc.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. a receiving handling method for link layer operation management maintenance OAM message, is characterized in that, comprising:
After the first port receives OAM message, determine the type of described first port;
When described first port is non-link polymerization terminal port, the relevant OAM attribute of described first port is obtained according to the first end oral thermometer preserved in advance, and carrying out OAM forwarding and state detection process according to a described OAM attribute, described first end oral thermometer records the OAM attribute field of all non-link polymerization terminal ports on described first port place line card;
When described first port is link polymerization terminal port, the 2nd relevant OAM attribute of described first port is obtained according to the second port table preserved in advance, and carrying out OAM forwarding and state detection process according to described 2nd OAM attribute, described second port table records the OAM attribute field of all link polymerization terminal ports on described first port place line card.
2. receiving handling method as claimed in claim 1, is characterized in that, described after the first port receives OAM message, determines the type of described first port, is specially:
After described first port receives OAM message, determine the type of described first port according to the total port table preserved in advance, described total port table records the type information of all of the port on described first port place line card.
3. receiving handling method as claimed in claim 2, is characterized in that,
Described total port table is by the respective port numbers of all of the port on described first port place line card and type code corresponding record;
Described first end oral thermometer is by the respective port numbers of all non-link polymerization terminal ports on described first port place line card and OAM attribute field corresponding record.
4. receiving handling method as claimed in claim 3, is characterized in that,
Described second port table is by the respective mark of all link aggregation examples and OAM attribute field corresponding record.
5. receiving handling method as claimed in claim 4, is characterized in that, described when described first port is link polymerization terminal port, obtains the 2nd relevant OAM attribute of described first port, be specially according to the second port table preserved in advance:
When described first port is link polymerization terminal port, obtain key assignments, described key assignments is the mark of the link aggregation example configured on described first port;
According to described key-value pair, the second port table is searched, to obtain the 2nd relevant OAM attribute of described first port.
6. receiving handling method as claimed in claim 5, is characterized in that,
Described total port table also records the mark of the link aggregation example of each self-configuring on all link polymerization terminal ports on described first port place line card.
7. receiving handling method as claimed in claim 1, it is characterized in that, the first end oral thermometer that described basis is preserved in advance obtains the relevant OAM attribute of described first port, and carries out OAM forwarding and state detection process according to a described OAM attribute, is specially:
From described first end oral thermometer, obtain an OAM attribute field of described first port, a described OAM attribute field comprises the index field that an OAM enable field, first forwards receiving port number and an OAM maintenance information table;
When a described OAM enable field represents not enable, abandon described OAM message, determine that link layer oam state is for abnormal;
When a described OAM enable field represents enable, described OAM message is forwarded to described first and forwards receiving port; Index field according to a described OAM maintenance information table obtains the described OAM maintenance information table preserved in advance, from a described OAM maintenance information table, obtain an OAM maintenance information; The OAM message received according to described first forwarding receiving port and a described OAM maintenance information, judge link layer oam state.
8. a receiving and processing device for link layer OAM message, is characterized in that, comprising:
Memory, for storing first end oral thermometer and the second port table, wherein, described first end oral thermometer records the OAM attribute field of all non-link polymerization terminal ports on the first port place line card, and described second port table records the OAM attribute field of all link polymerization terminal ports on described first port place line card;
Determination type module, for after the first port receives OAM message, determines the type of described first port;
First acquisition module, for when described first port is non-link polymerization terminal port, obtains the relevant OAM attribute of described first port according to described first end oral thermometer;
Second acquisition module, for when described first port is link polymerization terminal port, obtains the 2nd relevant OAM attribute of described first port according to described second port table;
Check processing module, for carrying out OAM forwarding and state detection process according to a described OAM attribute or the 2nd OAM attribute.
9. receiving and processing device as claimed in claim 8, is characterized in that,
Described memory, also have total port table of the type information of all of the port on the line card of described first end mouth place for stored record, described total port table is for determining the type of described first port.
10. receiving and processing device as claimed in claim 8 or 9, is characterized in that,
Described second acquisition module comprises:
Key assignments obtains submodule, for when described first port be link polymerization terminal port, described second port table by the respective mark of all link aggregation examples and OAM attribute field corresponding record time, obtain key assignments, described key assignments is the mark of the link aggregation example configured on described first port;
Search submodule, search for the second port table according to described key-value pair, to obtain the 2nd relevant OAM attribute of described first port.
11. 1 kinds of switches, is characterized in that,
Comprise the receiving and processing device described in described claim 8,9 or 10.
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| CN201110103955.6A CN102185764B (en) | 2011-04-25 | 2011-04-25 | Method and device for receiving and processing OAM (operation, administration and maintenance) messages in link layer and switch |
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| CN201110103955.6A CN102185764B (en) | 2011-04-25 | 2011-04-25 | Method and device for receiving and processing OAM (operation, administration and maintenance) messages in link layer and switch |
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| CN103095526B (en) * | 2013-01-06 | 2015-09-23 | 盛科网络（苏州）有限公司 | Based on the OAM reporting events method and system of scanning |
| CN105024985B (en) * | 2014-04-30 | 2019-04-02 | 深圳市中兴微电子技术有限公司 | A kind of message processing method and device |
| CN106712983B (en) * | 2015-07-27 | 2020-01-31 | 中兴通讯股份有限公司 | Operation, management and maintenance of OAM message processing method and device |
| CN107241267B (en) * | 2016-03-28 | 2021-02-23 | 华为技术有限公司 | OAM switching method and network equipment |
| CN107995048A (en) * | 2017-12-22 | 2018-05-04 | 盛科网络（苏州）有限公司 | Link OAM Session are instantiated as to the method and system of interface |
| CN110460479B (en) * | 2019-09-10 | 2022-02-11 | 杭州晨晓科技股份有限公司 | Logic link uniform scanning system and method |
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| CN101014158A (en) * | 2007-02-08 | 2007-08-08 | 华为技术有限公司 | XDSL networking system, data transmitting method and base station in XDSL networking system |
| CN101170512A (en) * | 2007-11-21 | 2008-04-30 | 中兴通讯股份有限公司 | Message service processing method |
| CN101471813A (en) * | 2007-12-29 | 2009-07-01 | 华为技术有限公司 | Configuration method, system and equipment for implementing domain-striding maintenance management |
| CN101635683A (en) * | 2009-08-27 | 2010-01-27 | 中兴通讯股份有限公司 | Method and device for transmitting service based on link aggregation |
| CN101826983A (en) * | 2010-04-02 | 2010-09-08 | 中兴通讯股份有限公司 | Dual-homing protection switching method, device and system |
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