CN101227334A - Encapsulation and processing method of operation management maintenance protocol data unit - Google Patents
Encapsulation and processing method of operation management maintenance protocol data unit Download PDFInfo
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- CN101227334A CN101227334A CNA2008100652230A CN200810065223A CN101227334A CN 101227334 A CN101227334 A CN 101227334A CN A2008100652230 A CNA2008100652230 A CN A2008100652230A CN 200810065223 A CN200810065223 A CN 200810065223A CN 101227334 A CN101227334 A CN 101227334A
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Abstract
The invention discloses a method for packaging operation administration and maintenance protocol data units and a method for processing. The method for packaging comprises: arranging an OAM cushion as a prefix when each port packages an ethernet operation administration and maintenance OAM protocol data unit into an MAC layer OAM frame and arranging characteristic mark information which is used to mark if a present OAM frame is allowed to be lost or not when the congestion condition is built in the OAM cushion. The method for processing comprises: receiving the OAM frame by each port and judging the present OAM frame is outputted or not in a subsequent processing process according to the characteristic mark information in the OAM cushion if the congestion condition is judged to be built, which enables a network node which supports the ethernet OAM to know if the present OAM information is allowed to be lost or not according to packaging information, satisfies the requirement for transmitting different OAM DPU, simplifies a processing process of the network node, increases the transmitting efficiency of the OAM information, and is beneficial for expanding OAM functions.
Description
Technical field
The present invention relates to the communications field, in particular, according to ITU-T standard Y.1731, realizing Ethernet OAM (Operation, Administration and Maintenance, operation, management and safeguard) during function, encapsulation OAM PDU (Protocol Data Unit, protocol Data Unit) is to the method for MAC layer (Media Access Control, medium access control system) OAM frame.
Background technology
The IP of the network information (Internet Protocol, Internet Protocol) changes makes Ethernet become a kind of important information-bearing network.When ethernet technology is applied to carrier-class transmission network, but require the professional stronger management characteristic that has.For this reason, ITU-T is organized as and transmits Ethernet and defined Y.1731 standard of OAM realization mechanism, for Ethernet service manage and protection provides support.Y.1731 define multiple Ethernet OAM PDU, and required the client characteristics information and identical forwarding condition and the route of OAM PDU experience of carrying.
But Y.1731 standard does not define the encapsulation format of ethernet mac layer OAM frame, that is does not describe the adaptation method of OAM PDU to MAC (Media Access Control, medium access control) frame.
Prior art method commonly used is that the type identification sign indicating number of OAM PDU prefix OAM frame is as 0x88E6.
As shown in Figure 1, if divide maintenance entity (ME, Maintenance Entity) based on port, then on the type identification sign indicating number, the place of prefix ME (also claiming Su Duan) MEP (ME group EndPoint, Maintenance Entity end points) MAC Address, source (also claiming the source end) MEP MAC Address successively again.
As shown in Figure 2, if divide ME based on port+VLAN (Virtual Local Area Network, VLAN), then before OAM frame type identification code, add the VLAN tag be used to divide ME, prefix ME place MEP MAC Address in order successively again, source MEP MAC Address.
According to the Y.1731 definition of standard, the forwarding of OAM PDU handled to distinguish treat.For example, under the normal condition, the OAM PDU of part type does not allow because of the congested node that is forwarded abandons, and the OAM PDU of part type allows to be dropped because of congested.
But, not comprising the relevant information of differentiating and processing in the packaging information of above-mentioned method for packing, forward node must be analyzed OAM PDU structure earlier, could determine afterwards whether corresponding OAM information allows to abandon or do not abandon because of congested.Forward node identification OAM PDU structure will increase the complexity of network node and reduce the forward efficiency of OAM information, simultaneously, also be unfavorable for further expanding of Ethernet OAM function.
Therefore, there is defective in prior art, needs to improve.
Summary of the invention
Technical problem to be solved by this invention is that forward node is analyzed after the OAM PDU structure, could determine whether corresponding OAM information allows to abandon because of congested, make to support whether the network node of Ethernet OAM function can allow to abandon according to the current OAM information of corresponding packaging information perception, satisfy ITU-T Y.1731 standard to the forwarding requirement of different OAM PDU.
Technical scheme of the present invention is as follows.
The method for packing of a kind of operation management maintain (OAM) protocol Data Unit (PDU), it may further comprise the steps: when A1, each port are encapsulated as MAC layer OAM frame to ethernet operation management maintenance OAM Protocol Data Unit, the OAM bed course is set as prefix at described protocol Data Unit; A2, in described OAM bed course, characteristic information sign is set, when being used to be identified at the congestion condition that pre-sets and setting up, whether allow to abandon current OAM frame.
Described method for packing, wherein, before steps A 1, also carry out following steps A0: for all nodes that belong to an Ethernet together, for supporting each port of Ethernet OAM function, distribute unique MAC Address, be used for sign and transmit operation management maintain information; And, after steps A 2, also carry out following steps: A21, judge that being based on port divides maintenance entity, also is based on port and VLAN and divides maintenance entity; A22, when dividing maintenance entity based on port, the MAC Address of the MAC Address of the type identification sign indicating number of the described OAM frame of prefix, place end Maintenance Entity port and source end Maintenance Entity port successively; A23, when dividing maintenance entity based on port and VLAN, the MAC Address of the MAC Address of the type identification sign indicating number of prefix VLAN ID, described OAM frame, place end Maintenance Entity port and source end Maintenance Entity port successively.
Described method for packing, wherein, in the steps A 23, described VLAN is when comprising the VLAN group of a plurality of VLAN IDs, the VLAN ID in the described OAM frame is the arbitrary VLAN ID that belongs to this VLAN group.
Described method for packing, wherein, described characteristic information sign comprises the two states sign at least: when satisfying the congestion condition that pre-sets in subsequent processes, allow and forbid abandoning current OAM frame.
Described method for packing, wherein, described characteristic information sign is set to 0 or 1, is identified at respectively when satisfying the congestion condition that pre-sets in the subsequent processes, allows and forbids abandoning current OAM frame.
A kind of processing method of operation management maintenance protocol data unit, it may further comprise the steps: B1, each port receive MAC layer OAM frame; The congestion condition that B2, judgement pre-set is set up, and then carries out B3; B3, according to the characteristic information in OAM bed course sign, judge and in subsequent processes, whether export current OAM frame.
Described processing method, wherein, step B3 specifically may further comprise the steps: B31, according to described characteristic information sign, judge in subsequent processes whether export current OAM frame, be then to carry out B32; Otherwise carry out B33; B32, current OAM frame is continued to output to subsequent processes; B33, abandon current OAM frame.
Described processing method, wherein, described port comprises the port of each intermediate node of transmitting described OAM frame, and the place end Maintenance Entity port of described OAM frame.
Described processing method, each port keep described characteristic information sign.
Described processing method, wherein, described characteristic information sign comprises the two states sign at least: when satisfying the congestion condition that pre-sets in subsequent processes, allow and forbid abandoning current OAM frame.
Adopt such scheme, the present invention improves industry OAM PDU method for packing commonly used, by status indicator being set at the OAM bed course, the feasible network node of supporting Ethernet OAM function, can be according to corresponding packaging information, learn whether current OAM information allows to abandon, thereby both satisfied ITU-T Y.1731 standard to the forwarding requirement of different OAM PDU, make network node can learn from packaging information directly whether corresponding OAM information allows to abandon or do not abandon because of congested again, simplified the handling process of supporting the network node of Ethernet OAM function, reduced the complexity of network node, promote the forward efficiency of OAM information, helped further expanding of Ethernet OAM function simultaneously.
Description of drawings
Fig. 1 be prior art divide MEP based on port the time, the OAM frame format schematic diagram of MAC layer;
Fig. 2 be prior art divide MEP based on port+VLAN the time, the OAM frame format schematic diagram of MAC layer;
Fig. 3 is of the present invention when dividing MEP based on port, the OAM frame format schematic diagram of MAC layer;
Fig. 4 is of the present invention when dividing MEP based on port+VLAN, the OAM frame format schematic diagram of MAC layer;
Fig. 5 is each end points of unidirectional ME and the intermediate point of the inventive method, to the process chart of OAM frame packaging information.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in the figure, the invention provides a kind of method for packing and processing method of protocol Data Unit (PDU) of operation management maintain (OAM) of Ethernet, make to support whether the network node of Ethernet OAM function can allow to abandon according to the current OAM information of corresponding packaging information perception, satisfy ITU-T Y.1731 standard to the forwarding requirement of different OAM PDU.This method for packing may further comprise the steps.
When A1, each port are encapsulated as MAC layer OAM frame to ethernet operation management maintenance OAM Protocol Data Unit, the OAM bed course is set as prefix at described protocol Data Unit; Promptly in MAC layer OAM frame structure, prefix OAM bed course.
A2, in described OAM bed course, characteristic information sign is set, when being used to be identified at the congestion condition that pre-sets and setting up, whether allow to abandon current OAM frame.Wherein, described characteristic information sign comprises the two states sign at least: when satisfying the congestion condition that pre-sets in subsequent processes, allow and forbid abandoning current OAM frame.
Above-mentioned congestion condition can be pre-defined or be provided with, also can be according to actual conditions, and be in operation or in maintenance, adjust, the present invention there is no additional limits to this.
For example, can be described the characteristic information sign be set to 0 or 1, be respectively applied for and be identified at when satisfying the congestion condition that pre-sets in the subsequent processes, allow and forbid abandoning current OAM frame; For example 0 representative can abandon current OAM frame, and 1 representative forbids abandoning current OAM frame.
An embodiment is, before steps A 1, can also carry out following steps A0: for all nodes that belong to an Ethernet together, for supporting each port of ethernet operation management maintenance function, distribute a unique MAC Address, be used for sign and transmit operation management maintain information.
And, behind prefix OAM bed course, also carry out following steps: A21, judge that being based on port divides maintenance entity, also is based on port and VLAN and divides maintenance entity; A22, when dividing maintenance entity based on port, the MAC Address of the MAC Address of the type identification sign indicating number of the described OAM frame of prefix, place end Maintenance Entity port and source end Maintenance Entity port successively; That is, as shown in Figure 3, set gradually the MAC Address of the MAC Address of OAM bed course, type identification sign indicating number, place end Maintenance Entity port and source end Maintenance Entity port as prefix at described protocol Data Unit; A23, when dividing maintenance entity based on port and VLAN, the MAC Address of the MAC Address of the type identification sign indicating number of prefix VLAN ID, described OAM frame, place end Maintenance Entity port and source end Maintenance Entity port successively; That is, as shown in Figure 4, set gradually the MAC Address of the MAC Address of OAM bed course, VLAN ID, type identification sign indicating number, place end Maintenance Entity port and source end Maintenance Entity port as prefix at described protocol Data Unit.
Wherein, in steps A 23, when described VLAN is when comprising the VLAN group of a plurality of VLAN IDs, the VLAN ID in the described OAM frame can be for belonging to arbitrary VLAN ID of this VLAN group; Promptly when the VLAN that divides ME is a group that comprises a plurality of VLAN Tag, the VLAN Tag in the OAM frame belongs to any one of this VLAN Tag group.
Below be a complete embodiment who uses method for packing of the present invention.
Step 1 belongs to all nodes of same Ethernet, is the unique MAC Address of each port assignment the whole network of supporting Ethernet OAM function.
Step 2 for the port of any support Ethernet OAM function, is all used the MAC Address sign of step 1 definition and is transmitted OAM information based on the MEP of port with based on the MEP of port+VLAN.
Step 3 is as shown in Figure 3, as follows with the method that OAM PDU is encapsulated as MAC layer OAM frame based on the source MEP of port: OAM PDU prefix OAM bed course, prefix 0x88E6, source MEP MAC Address successively again, last prefix place MEP MAC Address;
Perhaps, as shown in Figure 4, source MEP based on port+VLAN is as follows with the method that OAM PDU is encapsulated as MAC layer OAM frame: OAM PDU prefix OAM bed course, prefix 0x88E6, VLAN Tag, source MEP MAC Address, the place MEP MAC Address of dividing the corresponding ME of MEP successively again.
In the above-mentioned steps, the OAM bed course comprises current OAM frame and whether allows the characteristic information that is dropped because of congested, comprises two states at least: state A abandons current OAM frame when allowing congestion condition to occur in the subsequent processes; State B forbids abandoning when congestion condition appears in subsequent processes current OAM frame.
And the present invention also provides a kind of processing method of ethernet operation management maintenance protocol Data Unit, and it may further comprise the steps: B1, each port receive MAC layer OAM frame; The congestion condition that B2, judgement pre-set is set up, and then carries out B3; B3, according to the characteristic information in OAM bed course sign, judge and in subsequent processes, whether export current OAM frame.Wherein, described port can be a port of transmitting each intermediate node (MIP) of described OAM frame, also can be the place end Maintenance Entity port (MEP) of described OAM frame, and in forwarding and receiving course, each port keeps described characteristic information sign, does not make change.
Wherein, step B3 can specifically may further comprise the steps: B31, according to described characteristic information sign, judge in subsequent processes whether export current OAM frame, be then to carry out B32; Otherwise carry out B33; B32, current OAM frame is continued to output to subsequent processes; B33, abandon current OAM frame.
And same as above, described characteristic information sign comprises the two states sign at least: when satisfying the congestion condition that pre-sets in subsequent processes, allow and forbid abandoning current OAM frame.
Specifically, when each MIP of corresponding ME and place MEP receive the OAM frame,, must whether export current OAM frame according to the decision of OAM bed course characteristic information to subsequent processes if suffer from congestion condition.If state A abandons current OAM frame; If state B, current OAM frame continues to output to subsequent processes.In this process, each MIP and place MEP do not change the characteristic information of OAM bed course.
As shown in Figure 5, below again for an embodiment, unidirectional ME end points and the intermediate point processing procedure to the OAMPDU packaging information is described.
1. for the all-network node of same Ethernet,, be used to identify the active MEP that belongs to this port with addressing for supporting the unique MAC Address of each port assignment the whole network of OAM(Operation Administration Maintenance).
2. network node can be divided MEP based on port with based on port+VLAN.When dividing MEP based on port, source MEP is encapsulated as OAM PDU according to description shown in Figure 3 the OAM frame of MAC layer; When dividing MEP based on port+VLAN, source MEP is encapsulated as OAM PDU according to description shown in Figure 4 the OAM frame of MAC layer.
3. step 2 also comprises, when dividing MEP based on port+VLAN, if VLAN is corresponding one group of VLAN Tag, the VLAN Tag among Fig. 4 can be any one VLANTag in this VLAN Tag group.
4. step 2 also comprises, if the OAM PDU of current encapsulation allows to abandon, the DNE in the packaging information OAM bed course (Drop Not Eligible, not discardable) bit field is set to 0; If the OAM PDU of current encapsulation does not allow to abandon, the DNE bit field in the OAM bed course is set to 1.
5. belong to source MEP, the intermediate point MIP of identical ME, when place MEP transmits the OAM frame,, need to analyze the DNE bit field of OAM bed course in the packaging information if suffer from congestion condition.If DNE is 0, abandon this OAM frame; If DNE is 1, this OAM frame continues to output to the subsequent processes of respective nodes.
6. step 5 can also be described as, and belongs to source MEP, the intermediate point MIP of identical ME, when place MEP transmits the OAM frame, needs to analyze the DNE bit field of OAM bed course in the packaging information.If DNE is 0, be discardable with this OAM frame identification; If DNE is 1, with this OAM frame identification for not discardable.OAM frame after continuation will identify outputs to the subsequent processes of respective nodes.
7. step 5 and step 6 also comprise, the intermediate point MIP of ME, destination node MEP do not revise the DNE bit field of packaging information OAM bed course.
The beneficial effect of technique scheme is, continue to keep the encapsulation technology with existing Ethernet OAM frame compatible mutually, and implementation method is simple.Transmit OAM information owing to support the port of OAM(Operation Administration Maintenance) directly to distinguish in the ethernet network node, make that Ethernet OAM function can be more exactly according to Y.1731 standard realization according to packaging information.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (10)
1. the method for packing of an operation management maintenance protocol data unit, it may further comprise the steps:
When A1, each port are encapsulated as MAC layer OAM frame to ethernet operation management maintenance OAM Protocol Data Unit, the OAM bed course is set as prefix at described protocol Data Unit;
A2, in described OAM bed course, characteristic information sign is set, when being used to be identified at the congestion condition that pre-sets and setting up, whether allow to abandon current OAM frame.
2. method for packing according to claim 1, it is characterized in that, before steps A 1, also carry out following steps A0: for all nodes that belong to an Ethernet together, for supporting each port of Ethernet OAM function, distribute unique MAC Address, be used for sign and transmit operation management maintain information;
And, after steps A 2, also carry out following steps:
A21, judgement are based on port and divide maintenance entity, also are based on port and VLAN and divide maintenance entity;
A22, when dividing maintenance entity based on port, the MAC Address of the MAC Address of the type identification sign indicating number of the described OAM frame of prefix, place end Maintenance Entity port and source end Maintenance Entity port successively;
A23, when dividing maintenance entity based on port and VLAN, the MAC Address of the MAC Address of the type identification sign indicating number of prefix VLAN ID, described OAM frame, place end Maintenance Entity port and source end Maintenance Entity port successively.
3. method for packing according to claim 2, it is characterized in that, in the steps A 23, described VLAN is when comprising the VLAN group of a plurality of VLAN IDs, and the VLAN ID in the described OAM frame is the arbitrary VLAN ID that belongs to this VLAN group.
4. according to the arbitrary described method for packing of claim 1 to 3, it is characterized in that described characteristic information sign comprises the two states sign at least: when in subsequent processes, satisfying the congestion condition that pre-sets, allow and forbid abandoning current OAM frame.
5. method for packing according to claim 4 is characterized in that, described characteristic information sign is set to 0 or 1, is identified at respectively when satisfying the congestion condition that pre-sets in the subsequent processes, allows and forbids abandoning current OAM frame.
6. the processing method of an operation management maintenance protocol data unit, it may further comprise the steps:
B1, each port receive MAC layer OAM frame;
The congestion condition that B2, judgement pre-set is set up, and then carries out B3;
B3, according to the characteristic information in OAM bed course sign, judge and in subsequent processes, whether export current OAM frame.
7. processing method according to claim 6 is characterized in that step B3 specifically may further comprise the steps:
B31, according to described characteristic information sign, judge in subsequent processes whether export current OAM frame, be then to carry out B32; Otherwise carry out B33;
B32, current OAM frame is continued to output to subsequent processes;
B33, abandon current OAM frame.
8. processing method according to claim 6 is characterized in that, described port comprises the port of each intermediate node of transmitting described OAM frame, and the place end Maintenance Entity port of described OAM frame.
9. processing method according to claim 8, each port keep described characteristic information sign.
10. according to the arbitrary described processing method of claim 6 to 9, it is characterized in that described characteristic information sign comprises the two states sign at least: when in subsequent processes, satisfying the congestion condition that pre-sets, allow and forbid abandoning current OAM frame.
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| CN2008100652230A CN101227334B (en) | 2008-01-29 | 2008-01-29 | Encapsulation and processing method of operation management maintenance protocol data unit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888343A (en) * | 2010-07-30 | 2010-11-17 | 深圳市宏电技术股份有限公司 | Service data transmission method and system |
| CN101895409A (en) * | 2009-05-18 | 2010-11-24 | 华为技术有限公司 | Method, device and system for processing operation, administration and maintenance mechanism in multipath domain |
| CN102142979A (en) * | 2010-10-27 | 2011-08-03 | 华为数字技术有限公司 | Method and device for processing Ethernet operations, administration and maintenance protocol data unit |
| CN102404180A (en) * | 2011-11-10 | 2012-04-04 | 神州数码网络(北京)有限公司 | Method and system for realizing Operation and Maintenance (OAM) based on Packet Based Networks (PBN) network |
| CN102420828A (en) * | 2011-12-15 | 2012-04-18 | 华为技术有限公司 | Method, device and system for setting protocol management status |
| CN107613414A (en) * | 2016-07-12 | 2018-01-19 | 中国电信股份有限公司 | Data transmission device and method for EPON multi-wavelength passage |
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| CN100355248C (en) * | 2003-09-28 | 2007-12-12 | 上海贝尔阿尔卡特股份有限公司 | Multiple business realizing method based on ethernet passive optical network |
| US20110174307A1 (en) * | 2006-01-04 | 2011-07-21 | Lessi Stephane | Device for Supplying Oxygen to the Occupants of an Aircraft and Pressure Regulator for Such a Device |
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- 2008-01-29 CN CN2008100652230A patent/CN101227334B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895409A (en) * | 2009-05-18 | 2010-11-24 | 华为技术有限公司 | Method, device and system for processing operation, administration and maintenance mechanism in multipath domain |
| CN101895409B (en) * | 2009-05-18 | 2013-09-11 | 华为技术有限公司 | Method, device and system for processing operation, administration and maintenance mechanism in multipath domain |
| CN101888343A (en) * | 2010-07-30 | 2010-11-17 | 深圳市宏电技术股份有限公司 | Service data transmission method and system |
| CN101888343B (en) * | 2010-07-30 | 2012-07-04 | 深圳市宏电技术股份有限公司 | Service data transmission method and system |
| CN102142979A (en) * | 2010-10-27 | 2011-08-03 | 华为数字技术有限公司 | Method and device for processing Ethernet operations, administration and maintenance protocol data unit |
| CN102404180A (en) * | 2011-11-10 | 2012-04-04 | 神州数码网络(北京)有限公司 | Method and system for realizing Operation and Maintenance (OAM) based on Packet Based Networks (PBN) network |
| CN102420828A (en) * | 2011-12-15 | 2012-04-18 | 华为技术有限公司 | Method, device and system for setting protocol management status |
| CN107613414A (en) * | 2016-07-12 | 2018-01-19 | 中国电信股份有限公司 | Data transmission device and method for EPON multi-wavelength passage |
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| CN101227334B (en) | 2011-06-22 |
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