CN102185764A - 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 receiving handling method, device and the switch of link layer operation management maintain OAM message.
Background technology
Along with development of internet technology, OAM (operation, administration and maintenance, Operations, Administration and Maintenance) more and more important, the present numerous OAM agreements that exist, as CFM (Connectivity Fault Management, the connection fault management), MPLS (Multi-Protocol Label Switching, multiprotocol label switching)-TP OAM etc. has the function of supporting that link layer detects.
Usually, a network equipment (as switch) has one or more ply-yarn drills, one or more ports is arranged, wherein on each ply-yarn drill, the port that has does not add link aggregation (being called non-link polymerization terminal port), and the port that has adds link aggregation (being called link polymerization terminal port).A plurality of link polymerization terminal port polymerizations are abstracted into a logic port, the corresponding logical links that forms, 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 ply-yarn drills.
In the prior art, need on port, detect example link layer OAM is carried out the packet receiving detection by binding O AM, judge whether link work is normal.After receiving an OAM message such as port A at switch, obtain the relevant OAM attribute (pre-configured) of port A earlier, the OAM attribute that port A is relevant comprise port A whether OAM enable, the OAM maintenance information of port A and the OAM message forwarding receiving port number that reception is forwarded; Carry out OAM according to the relevant OAM attribute of port A then and transmit and state detection process, be about to the OAM message and be transmitted to the forwarding receiving port, OAM message and the OAM maintenance information that receives according to the forwarding receiving port compares again, judges whether link work is normal.
In the prior art, the OAM attribute field that port is relevant is stored in the big table, need utilize the numbering of port place ply-yarn drill and the port numbers of this port on ply-yarn drill that this big table is searched, to obtain the relevant OAM attribute of port.If the employing linear search technique has increased memory space greatly, memory space can present 2 power power multiple along with the increase of ply-yarn drill number to be increased, head and shoulders above frame link aggregation example demand; And if the employing nonlinear method as hash algorithm or binary tree, then can increase the microcode operation complexity greatly, especially for instruction space network processing unit at full stretch, the microcode operation complexity is higher.
Summary of the invention
The embodiment of the invention provides receiving handling method, device and the switch of link layer operation management maintain OAM message, in order to the reception treatment technology that solves existing link layer OAM message take that memory space is big, operation is than complicated problems.
The embodiment of the invention provides a kind of receiving handling method of link layer operation management maintain OAM message, it is characterized in that, comprising:
After first port receives the OAM message, determine the type of described first port;
When described first port is non-link polymerization terminal port, obtain the relevant OAM attribute of described first port according to first port table of preserving in advance, and carry out OAM according to a described OAM attribute and transmit and state detection process, described first port table records the OAM attribute field of all non-link polymerization terminal ports on the described first port place ply-yarn drill;
When described first port is link polymerization terminal port, obtain the 2nd relevant OAM attribute of described first port according to second port table of preserving in advance, and carry out OAM according to described the 2nd OAM attribute and transmit and state detection process, described second port table records the OAM attribute field of all link polymerization terminal ports on the described first port place ply-yarn drill.
Described after first port receives the OAM message, determine the type of described first port, be specially:
After described first port receives the OAM message, determine the type of described first port according to total port table of preserving in advance, described total port table records the type information of all of the port on the described first port place ply-yarn drill.
Described total port table is with all of the port port numbers and type code corresponding record separately on the described first port place ply-yarn drill;
Described first port table is with all non-link polymerization terminal ports port numbers and OAM attribute field corresponding record separately on the described first port place ply-yarn drill.
Described second port table is with all link aggregation examples sign and OAM attribute field corresponding record separately.
Described when described first port is link polymerization terminal port, obtain the 2nd relevant OAM attribute of described first port according to second port table of preserving in advance, be specially:
When described first port is link polymerization terminal port, obtain key assignments, described key assignments is the sign of the link aggregation example that disposes on described first port;
Search according to described second port table of described key-value pair, to obtain the 2nd relevant OAM attribute of described first port.
Described total port table also records on the described first port place ply-yarn drill sign of the link aggregation example of each self-configuring on all link polymerization terminal ports.
First port table that described basis is preserved in advance obtains the relevant OAM attribute of described first port, and carries out OAM according to a described OAM attribute and transmit and state detection process, is specially:
Obtain an OAM attribute field of described first port from described first port table, a described OAM attribute field comprises the index field of an OAM enable field, the first forwarding receiving port number and an OAM maintenance information table;
When a described OAM enable field is represented not enable, abandon described OAM message, determine that the link layer oam state is for unusual;
When a described OAM enable field is represented to enable, described OAM message is forwarded to described first transmits receiving port; Index field according to a described OAM maintenance information table obtains a described OAM maintenance information table of preserving in advance, obtains an OAM maintenance information from a described OAM maintenance information table; Transmit an OAM message and the described OAM maintenance information that receiving port receives, judgement link layer oam state according to described first.
The embodiment of the invention provides a kind of receiving and processing device of link layer OAM message, comprising:
Memory, be used to store first port table and second port table, wherein, described first port table records the OAM attribute field of all non-link polymerization terminal ports on the described first port place ply-yarn drill, and described second port table records the OAM attribute field of all link polymerization terminal ports on the described first port place ply-yarn drill;
The type determination module is used for determining the type of described first port after first port receives the OAM message;
First acquisition module is used for when described first port is non-link polymerization terminal port, obtains the relevant OAM attribute of described first port according to described first port table;
Second acquisition module is used 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;
Detect processing module, be used for carrying out OAM forwarding and state detection process according to a described OAM attribute or the 2nd OAM attribute.
Described memory also is used for total port table that stored record has the type information of all of the port on the described first port place ply-yarn drill, and described total port table is used for determining the type of described first port.
Described second acquisition module comprises:
Key assignments obtains submodule, be used for when described first port be link polymerization terminal port, described second port table with all link aggregation examples separately sign and during OAM attribute field corresponding record, obtain key assignments, described key assignments is the sign of the link aggregation example that disposes on described first port;
Search submodule, be used for searching, to obtain the 2nd relevant OAM attribute of described first port according to described second port table of described key-value pair.
The embodiment of the invention provides a kind of switch, comprises described receiving and processing device.
In the technical scheme that the embodiment of the invention provides, obtain the OAM attribute and be divided into for three steps, at first the port type that receives the 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 port table, if this port is a link polymerization terminal port, then obtain the relevant OAM attribute of this port according to second port table; Obtain after the OAM attribute, carry out OAM according to the OAM attribute and transmit and state detection process.Compared with prior art, this method has been saved memory space, obtains the simple to operate of OAM attribute, but has also improved extensibility and versatility simultaneously.
Description of drawings
Fig. 1 is the flow chart of the receiving handling method of link layer OAM message in the embodiment of the invention;
Fig. 2 is the embodiment flow chart of step S102 in the embodiment of the invention;
Fig. 3 is the structural representation of the receiving and processing device of link layer OAM message in the embodiment of the invention;
Fig. 4 is the structural representation of second acquisition module among Fig. 3.
Embodiment
For technical problem, technical scheme and advantage that the embodiment of the invention will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, the embodiment of the invention provides a kind of receiving handling method of link layer OAM message, may further comprise the steps:
S101, after first port receives the OAM message, determine the type of first port.
Particularly, after first port receives the OAM message, can determine the type of first port according to total port table of preserving in advance, total port table records the type information of all of the port on the first port place ply-yarn drill.
Wherein, total port table can be with all of the port port numbers and type code corresponding record separately on the first port place ply-yarn drill, and all of the port port numbers separately is different.The list item entry number of total port table equals the port number that the first port place ply-yarn drill is supported.
The port numbers of each port can be represented with the local end slogan, always has 48 ports such as a ply-yarn drill, and these ten numerals of then available 1-48 or 48 binary numbers are numbered respectively for these 48 ports.Type code can be set to 1 or 0,1 expression port and add link aggregation, is link polymerization terminal port; 0 expression port does not add link aggregation, is non-link polymerization terminal port.
S102, when first port is non-link polymerization terminal port, obtain the relevant OAM attribute of first port according to first port table of preserving in advance, and carry out OAM according to an OAM attribute and transmit and state detection process, first port table records the OAM attribute field of all non-link polymerization terminal ports on the first port place ply-yarn drill.
Wherein, first port table can be with port numbers and the OAM attribute field corresponding record separately of all non-link polymerization terminal ports on the first port place ply-yarn drill, and all non-link polymerization terminal ports port numbers separately is different.
The port numbers of each non-link polymerization terminal port can be represented with local port number.
The OAM attribute field comprises the OAM enable field, transmits the index field of receiving port number and OAM maintenance information table.The OAM enable field can be set to 1 or 0,1 for enabling, represented this port binding OAM detect example; 0 for not enabling, and represents not binding O AM detection example of this port.Transmit the port numbering that receiving port number is meant the OAM message that reception is forwarded by first port, available local end slogan is represented.The index field of OAM maintenance information table is used for inquiring about OAM maintenance information table.First port and forwarding receiving port all are positioned on the local terminal equipment, and transmitting receiving port can be different with the first port place ply-yarn drill.
As shown in Figure 2, step S102 can be embodied as following steps:
S1021, obtain an OAM attribute field of first port from first port table, an OAM attribute field comprises that an OAM enable field, first transmits the index field of a receiving port number and an OAM maintenance information table;
S1022, when an OAM enable field is represented not enable, abandon the OAM message, determine that the link layer oam state is for unusual;
When an OAM enable field is represented to enable, the OAM message is forwarded to first transmits receiving port; Index field according to an OAM maintenance information table obtains an OAM maintenance information table of preserving in advance, obtains an OAM maintenance information from an OAM maintenance information table; Transmit an OAM message and the OAM maintenance information that receiving port receives, judgement link layer oam state according to first.
Inconsistent as the MEG id field in a MEG id field in the OAM message and the OAM maintenance information, show that the Service Instance from frame and MEP self the MEG ID representative of different Service Instances mixes mutually, MEP detects mistake and sneaks into, this situation may be that error configurations causes, also may be that the link layer oam state is that MEG ID is unusual due to hardware or software in the network malfunctioning.The comparing class of other link layer oam states such as non-expectation MEP, non-expectational cycle is like MEG ID.
Wherein, if the link layer oam state changes (as producing unusual or unusual disappear etc.), then can carry out follow-up operation, such as alarm demonstration, link switchover etc.; If the link layer oam state does not change, then abandon the OAM message.
S103, when first port is link polymerization terminal port, obtain the 2nd relevant OAM attribute of first port according to second port table of preserving in advance, and carry out OAM according to the 2nd OAM attribute and transmit and state detection process, second port table records the OAM attribute field of all link polymerization terminal ports on the first port place ply-yarn drill.
The embodiment of step S103 can be with reference to above-mentioned steps S1021-S1022.
Wherein, second port table can be with all link aggregation examples sign and OAM attribute field corresponding record separately, and all link aggregation examples sign separately is different.At this moment, the pairing second port table content of each ply-yarn drill is all identical.The list item entry number of second port table equals all link aggregation instance number that frame is supported.When having 128 such as the link aggregation example of frame support, the sign of link aggregation example can use 7 bit fields to represent.
At this moment, obtain the 2nd relevant OAM attribute of first port, can be embodied as according to second port table of preserving in advance:
Obtain key assignments, key assignments is the sign of the link aggregation example that disposes on first port;
Search according to key-value pair second port table, to obtain the 2nd relevant OAM attribute of first port.
Wherein, in order to save memory space and easy-to-look-up, key assignments can be stored in total port table, and promptly total port table can also record the key assignments of all link polymerization terminal port correspondences on the first port place ply-yarn drill.At this moment, total port table not only can be with all of the port port numbers and type code corresponding record separately on the first port place ply-yarn drill, can also with all of the port on the first port place ply-yarn drill separately port numbers and the key assignments corresponding record (when port is non-link polymerization terminal port, corresponding key assignments can be set to sky or represent need not search the preset value of second port table), the mode of record can have multiple, such as being set to a field by type code, key assignments is set to another field, also can type code and key assignments merge and be set to a field (when having 128 such as the link aggregation example of frame support, corresponding each port numbers is provided with the critical field of one 8 bit respectively in total port table, wherein the field of 1 bit is used for representing type code, and the field of other 7 bits is used for representing key assignments).
The preservation address of above-mentioned first port table and second port table can not be overlapping, with the OAM maintenance information mistake of avoiding obtaining.After the ply-yarn drill of frame, port increase, need expand total port table, first port table and second port table, in view of these several tables are linear list, its extensibility and can be universal all preferable.
In the receiving handling method of the link layer OAM message that the embodiment of the invention provides, obtain the OAM attribute and be divided into for three steps, at first the port type that receives the 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 port table, if this port is a link polymerization terminal port, then obtain the relevant OAM attribute of this port according to second port table; Obtain after the OAM attribute, carry out OAM according to the OAM attribute and transmit and state detection process.Compared with prior art, this method has been saved memory space, obtains the simple to operate of OAM attribute, but has also improved extensibility and versatility simultaneously.
As a distributed system, frame has 10 ply-yarn drills, and each ply-yarn drill port number is 48, and the link aggregation example of frame support is 128, if adopt prior art, the list item clauses and subclauses that each ply-yarn drill needs are 48* (2 altogether
4)=768 are 7680 for 10 shared clauses and subclauses of ply-yarn drill of whole frame altogether, and entry number is more, and it is big to take memory space; If, adopt nonlinear method in order to reduce memory space, as hash algorithm or binary tree, then can increase the microcode operation complexity greatly, especially for instruction space network processing unit at full stretch, the microcode operation complexity is higher.
And the technical scheme that adopts the embodiment of the invention to provide, the list item clauses and subclauses of total port table of each ply-yarn drill correspondence are 48, the list item clauses and subclauses of first port table mostly are 48 most, the list item clauses and subclauses of second port table are 128, the list item clauses and subclauses that each ply-yarn drill needs mostly are 224 most, mostly are 2240 most for the shared list item clauses and subclauses of 10 ply-yarn drills of whole frame, compared with prior art, entry number is less, and it is little to take memory space; When obtaining the relevant OAM attribute of a port, in total port table, search earlier, utilize port numbers to search or utilize the key assignments of link aggregation instance port correspondence in second port table, to search again at first port table, because of first port table and second port table only be find key value inconsistent, operation in code can merge, generally speaking only need carry out twice linear search, so search operation is simple.
Compared with prior art, the technical scheme that the embodiment of the invention provides has been saved memory space, obtains the simple to operate of OAM attribute.
As shown in Figure 3, the embodiment of the invention also provides a kind of receiving and processing device of link layer OAM message, comprising:
Memory, be used to store first port table and second port table, wherein, first port table records the OAM attribute field of all non-link polymerization terminal ports on the first port place ply-yarn drill, and second port table records the OAM attribute field of all link polymerization terminal ports on the first port place ply-yarn drill;
The type determination module is used for determining the type of first port after first port receives the OAM message;
First acquisition module is used for when first port is non-link polymerization terminal port, obtains the relevant OAM attribute of first port according to first port table;
Second acquisition module is used for when first port is link polymerization terminal port, obtains the 2nd relevant OAM attribute of first port according to second port table;
Detect processing module, be used for carrying out OAM forwarding and state detection process according to an OAM attribute or the 2nd OAM attribute.
Wherein, above-mentioned memory also is used for total port table that stored record has the type information of all of the port on the first port place ply-yarn drill, and this total port table is used for determining the type of first port.
As shown in Figure 4, second acquisition module among Fig. 3 can also comprise:
Key assignments obtains submodule, be used for when first port be link polymerization terminal port, second port table with all link aggregation examples separately sign and during OAM attribute field corresponding record, obtain key assignments, key assignments is the sign of the link aggregation example that disposes on first port;
Search submodule, be used for searching, to obtain the 2nd relevant OAM attribute of first port according to key-value pair second port table.
In the receiving and processing device of the link layer OAM message that the embodiment of the invention provides, obtain the OAM attribute and be divided into for three steps, at first the port type that receives the 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 port table, if this port is a link polymerization terminal port, then obtain the relevant OAM attribute of this port according to second port table; Obtain after the OAM attribute, carry out OAM according to the OAM attribute and transmit and state detection process.Compared with prior art, this device has been saved memory space, obtains the simple to operate of OAM attribute, but has also improved extensibility and versatility simultaneously.
The embodiment of the 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 be provided with the receiving and processing device of above-mentioned link layer OAM message.
One of ordinary skill in the art will appreciate that, realize that all or part of step in the method for the above-mentioned fact is to instruct relevant hardware to finish by program, above-mentioned program can be stored in the storage medium that a computer be can read, this program comprises above-mentioned step when carrying out.Above-mentioned storage medium can be ROM/RAM, disk, CD etc.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away 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. the receiving handling method of a link layer operation management maintain OAM message is characterized in that, comprising:
After first port receives the OAM message, determine the type of described first port;
When described first port is non-link polymerization terminal port, obtain the relevant OAM attribute of described first port according to first port table of preserving in advance, and carry out OAM according to a described OAM attribute and transmit and state detection process, described first port table records the OAM attribute field of all non-link polymerization terminal ports on the described first port place ply-yarn drill;
When described first port is link polymerization terminal port, obtain the 2nd relevant OAM attribute of described first port according to second port table of preserving in advance, and carry out OAM according to described the 2nd OAM attribute and transmit and state detection process, described second port table records the OAM attribute field of all link polymerization terminal ports on the described first port place ply-yarn drill.
2. receiving handling method as claimed in claim 1 is characterized in that, and is described after first port receives the OAM message, determines the type of described first port, is specially:
After described first port receives the OAM message, determine the type of described first port according to total port table of preserving in advance, described total port table records the type information of all of the port on the described first port place ply-yarn drill.
3. receiving handling method as claimed in claim 2 is characterized in that,
Described total port table is with all of the port port numbers and type code corresponding record separately on the described first port place ply-yarn drill;
Described first port table is with all non-link polymerization terminal ports port numbers and OAM attribute field corresponding record separately on the described first port place ply-yarn drill.
4. receiving handling method as claimed in claim 3 is characterized in that,
Described second port table is with all link aggregation examples sign and OAM attribute field corresponding record separately.
5. receiving handling method as claimed in claim 4 is characterized in that, and is described when described first port is link polymerization terminal port, obtains the 2nd relevant OAM attribute of described first port according to second port table of preserving in advance, is specially:
When described first port is link polymerization terminal port, obtain key assignments, described key assignments is the sign of the link aggregation example that disposes on described first port;
Search according to described second port table of described key-value pair, 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 on the described first port place ply-yarn drill sign of the link aggregation example of each self-configuring on all link polymerization terminal ports.
7. receiving handling method as claimed in claim 1, it is characterized in that, first port table that described basis is preserved in advance obtains the relevant OAM attribute of described first port, and carries out OAM according to a described OAM attribute and transmit and state detection process, is specially:
Obtain an OAM attribute field of described first port from described first port table, a described OAM attribute field comprises the index field of an OAM enable field, the first forwarding receiving port number and an OAM maintenance information table;
When a described OAM enable field is represented not enable, abandon described OAM message, determine that the link layer oam state is for unusual;
When a described OAM enable field is represented to enable, described OAM message is forwarded to described first transmits receiving port; Index field according to a described OAM maintenance information table obtains a described OAM maintenance information table of preserving in advance, obtains an OAM maintenance information from a described OAM maintenance information table; Transmit an OAM message and the described OAM maintenance information that receiving port receives, judgement link layer oam state according to described first.
8. the receiving and processing device of a link layer OAM message is characterized in that, comprising:
Memory, be used to store first port table and second port table, wherein, described first port table records the OAM attribute field of all non-link polymerization terminal ports on the described first port place ply-yarn drill, and described second port table records the OAM attribute field of all link polymerization terminal ports on the described first port place ply-yarn drill;
The type determination module is used for determining the type of described first port after first port receives the OAM message;
First acquisition module is used for when described first port is non-link polymerization terminal port, obtains the relevant OAM attribute of described first port according to described first port table;
Second acquisition module is used 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;
Detect processing module, be used 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 is used for total port table that stored record has the type information of all of the port on the described first port place ply-yarn drill, and described total port table is used 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, be used for when described first port be link polymerization terminal port, described second port table with all link aggregation examples separately sign and during OAM attribute field corresponding record, obtain key assignments, described key assignments is the sign of the link aggregation example that disposes on described first port;
Search submodule, be used for searching, to obtain the 2nd relevant OAM attribute of described first port according to described second port table of described key-value pair.
11. a switch is characterized in that,
Comprise described claim 8,9 or 10 described receiving and processing devices.
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| CN105024985A (en) * | 2014-04-30 | 2015-11-04 | 深圳市中兴微电子技术有限公司 | Message processing method and apparatus |
| CN106712983A (en) * | 2015-07-27 | 2017-05-24 | 中兴通讯股份有限公司 | OAM message processing method and apparatus |
| CN107241267A (en) * | 2016-03-28 | 2017-10-10 | 华为技术有限公司 | A kind of OAM switching methods and the 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 |
| CN110460479A (en) * | 2019-09-10 | 2019-11-15 | 杭州晨晓科技股份有限公司 | A kind of logical links uniform scanning system and method |
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