CN101820368A - Ethernet link failure detection method and device - Google Patents
Ethernet link failure detection method and device Download PDFInfo
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- CN101820368A CN101820368A CN 201010147557 CN201010147557A CN101820368A CN 101820368 A CN101820368 A CN 101820368A CN 201010147557 CN201010147557 CN 201010147557 CN 201010147557 A CN201010147557 A CN 201010147557A CN 101820368 A CN101820368 A CN 101820368A
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Abstract
The embodiment of the invention discloses an Ethernet link failure detection method and an Ethernet link failure detection device. The method comprises the following steps of: receiving a first continuity check message (CCM) carrying a failure report from first equipment; judging whether own equipment identifier is identical with that of failing equipment in the first CCM or not; if so, acquiring that a first link between the equipment per se and the first equipment is a unidirectional link; and if not, acquiring that the first link between own equipment and the first equipment does not fail. The method and the device are suitable for detecting and positioning a failing Ethernet link.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of ethernet link fault detection method and device.
Background technology
E-LMI (Ethernet Local Management Interface ether local management interface) protocol application is in the PE of network (Provider Edge, provider's edge device) and CE (Customer Edge, customer edge) between, link between the PE can be abstracted into EVC (Ethernet VirtualConnection, the virtual connection of ether).The state information of EVC can rely on the 802.1ag agreement and detect, and the accuracy of EVC state information then depends on the accuracy of the fault detect in the 802.1ag agreement.
802.1ag the fault detect in the agreement is by MEP (Maintenance association End Point, safeguard edge nodes) periodically to same MA (Maintenance Association, safeguard collection) interior other RMEP (Remote Maintenance association End Point, the remote maintenance edge nodes) sends CCM (Continuity Check Message, detection of connectivity message) message, also receive simultaneously the CCM message of other MEP, if in three cycles, do not receive the other side's CCM message, think that then link breaks down, MEP sends the CCM message that carries warning information with other MEP in same MA.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:
All receive the MEP of this CCM message, will think that self and the link that sends between the MEP of this CCM message that carries warning information break down, thereby may cause the wrong report of link failure, can't position the link that breaks down exactly.
Summary of the invention
Embodiments of the invention provide a kind of ethernet link fault detection method and device, can exactly the link that breaks down in the Ethernet be detected and locate.
The technical scheme that the embodiment of the invention adopts is:
A kind of ethernet link fault detection method comprises:
Receive the CCM message that carries Trouble Report that first equipment sends;
Whether the device identification of judging self is identical with faulty equipment sign in the described CCM message, when described self device identification and described faulty equipment identifies when identical, knows that first Link State between self and described first equipment is an one way link; When described self device identification and described faulty equipment sign not simultaneously, know that first Link State between self and described first equipment is not for breaking down.
A kind of ethernet link failure detector comprises:
Receiver module is used to the CCM message that carries Trouble Report that first equipment that receives sends;
First judge module, be used for judging whether the device identification of self is identical with the faulty equipment sign of a described CCM message, when described self device identification and described faulty equipment identifies when identical, know that first Link State between self and described first equipment is an one way link; When described self device identification and described faulty equipment sign not simultaneously, know that first Link State between self and described first equipment is not for breaking down.
Embodiment of the invention ethernet link fault detection method and device, behind the CCM message that carries Trouble Report that first equipment that receives sends, whether the device identification of judging self is identical with faulty equipment sign in the described CCM message, have only when self device identification and described faulty equipment to identify when identical, know that just first Link State between self and described first equipment is an one way link.Compared with prior art, the present invention can identify according to the faulty equipment in the CCM message that carries Trouble Report, determine to occur in the Ethernet position of one way link, can avoid the wrong report of link failure, thereby the link that breaks down is accurately located, for network operation provides reliable reference frame.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The method flow diagram that Fig. 1 provides for the embodiment of the invention one;
The method flow diagram that Fig. 2 provides for the embodiment of the invention two;
The CCM message format schematic diagram that Fig. 3 provides for the embodiment of the invention;
The apparatus structure schematic diagram that Fig. 4, Fig. 5 provide for the embodiment of the invention three.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making all other embodiment that obtained under the creative work prerequisite.
For the advantage that makes technical solution of the present invention is clearer, the present invention is elaborated below in conjunction with drawings and Examples.
Embodiment one
Present embodiment provides a kind of ethernet link fault detection method, as shown in Figure 1, if the first equipment MEP does not receive the CCM message of opposite equip. in three cycles, think that then link breaks down, the first equipment MEP carries the CCM message of Trouble Report with other MEP transmissions in same MA.Described method comprises:
101, receive the CCM message that carries Trouble Report that first equipment sends.
102, whether the device identification of judging self is identical with faulty equipment sign in the described CCM message, when described self device identification and described faulty equipment identifies when identical, know that first Link State between self and described first equipment is an one way link; When described self device identification and described faulty equipment sign not simultaneously, know that first Link State between self and described first equipment is not for breaking down.
Embodiment of the invention ethernet link fault detection method, behind the CCM message that carries Trouble Report that first equipment that receives sends, whether the device identification of judging self is identical with faulty equipment sign in the described CCM message, have only when self device identification and described faulty equipment to identify when identical, know that just first Link State between self and described first equipment is an one way link.Compared with prior art, the present invention can identify according to the faulty equipment in the CCM message that carries Trouble Report, determine to occur in the Ethernet position of one way link, can avoid the wrong report of link failure, thereby the link that breaks down is accurately located, for network operation provides reliable reference frame.
Embodiment two
In the present embodiment, MEP receives the CCM message that carries Trouble Report of the far-end RMEP transmission that is positioned at same MA, carries out link failure detection according to this CCM message, and described MA can be VLAN (Virtual LocalArea Network, VLAN).Different with embodiment one is, MEP at first judges whether carry the faulty equipment sign in the CCM message that is received by opposite equip., when carrying faulty equipment when sign in this CCM message, judge according to this faulty equipment sign whether the link between self and this opposite equip. breaks down.
As shown in Figure 2, described ethernet link fault detection method comprises:
201, MEP receives the CCM message that carries Trouble Report that RMEP sends.
Wherein, when RMEP does not receive the CCM message of MEP in three cycles, think that fault has appearred in the link between RMEP and the MEP, RMEP carries the CCM message of Trouble Report with other MEP transmissions in same MA.
Wherein, the form of a described CCM message as shown in Figure 3 specifically can be referring to the relevant regulations in the 802.1ag agreement.
Wherein, described Trouble Report can be the RDI warning information, and as shown in Figure 3, in a described CCM message, described RDI warning information can carry by Flags (8) field.Particularly, as shown in the table, described Flags (8) field is made up of three parts: the CCM Interval of the RDI flag of 1 byte, the Reserved of 4 bytes and 3 bytes when described RDI flag is changed to 1, shows in the described CCM message and carries the RDI warning information.
| RDI?flag(1) | Reserved(4) | CCM?Interval(3) |
202, judge whether carry the faulty equipment sign in the described CCM message, if do not carry the faulty equipment sign in the described CCM message, then execution in step 203; If carry the faulty equipment sign in the described CCM message, then execution in step 204.
Wherein, described faulty equipment sign can be the ID or MAC (Media AccessControl, the medium access control) address of faulty equipment, but is not limited only to this.Described ID is the identity marks of unique identification MEP, is specially one of them between the 1-8192.
Described faulty equipment sign can be carried in the TLV field in the CCM message, as shown in Figure 3, increases the TLV field between described Interface TLV and End TLV, carries the faulty equipment sign in the described TLV field; The length of described TLV field is determined according to the number of faulty equipment sign.The number of the faulty equipment sign of carrying in the same CCM message can be for one or more; Wherein, when not receiving the CCM message of a plurality of MEP in RMEP (is generally three cycles) at the fixed time, the number of the faulty equipment sign of carrying in the CCM message that RMEP sends is a plurality of.
203, know that first Link State between self and the described RMEP is an one way link, finish this method.
204, whether the device identification of judging self is identical with faulty equipment sign in the described CCM message, and identical if the device identification of self and described faulty equipment identify, then execution in step 205; If the device identification of self is different with described faulty equipment sign, then execution in step 208.
205, know that first Link State between self and the RMEP is an one way link, that is: self can receive the message that RMEP sends, and self can not send message to RMEP, judge that then whether second Link State between self and the RMEP of self maintained is for breaking down, if break down, then execution in step 206; If do not break down, then execution in step 207.
Wherein, be provided with memory module among the MEP, before step 205, described method can also comprise:
Store second Link State between self and described first equipment in described memory module in advance, MEP is according to described second Link State, can know whether the link between self and the RMEP breaks down, thereby provides reference frame for network operation.
206, keep described second Link State constant.
Particularly, to keep described second Link State be down to MEP.
207, second Link State in the described memory module is updated to breaks down.
Particularly, MEP is updated to down with second Link State in the described memory module by up.
208, know first Link State between self and the RMEP for not breaking down, judge self maintained self and RMEP between second Link State whether for not breaking down, if do not break down, then execution in step 209; If break down, then execution in step 210.
209, keep described second Link State constant.
Particularly, to keep described second Link State be up to MEP.
210, second Link State in the described memory module is updated to does not break down.
Particularly, MEP is updated to up with second Link State in the described memory module by down.
Further, described method can also comprise:
When the 2nd CCM message that second equipment of not receiving in the given time sends, the device identification of described second equipment is identified as faulty equipment, add in the 3rd CCM message that carries Trouble Report;
Described the 3rd CCM message is sent to described second equipment.
Embodiment of the invention ethernet link fault detection method, behind the CCM message that carries Trouble Report that first equipment that receives sends, judge and whether carry the faulty equipment sign in the described CCM message, when carrying the faulty equipment sign in the described CCM message, whether the device identification of judging self is identical with faulty equipment sign in the described CCM message, have only when self device identification and described faulty equipment to identify when identical, know that just first Link State between self and described first equipment is an one way link.Compared with prior art, the present invention can identify according to the faulty equipment in the CCM message that carries Trouble Report, determine to occur in the Ethernet position of one way link, can avoid the wrong report of link failure, thereby the link that breaks down is accurately located, for network operation provides reliable reference frame; In addition, can also upgrade the Link State between self and the opposite equip. of self maintained according to the link failure detection result, thereby can facilitate for network operation further.
Embodiment three
Present embodiment provides a kind of ethernet link failure detector, and as shown in Figure 4, described device comprises:
Wherein, if described first equipment does not receive the CCM message of opposite equip. in three cycles, think that then link breaks down, described first equipment carries the CCM message of Trouble Report with other opposite equip.s transmissions in same MA.
Wherein, described Trouble Report can be the RDI warning information, and RDI sign position is 1 in the Flag field in the promptly described CCM message.As shown in Figure 3, in a described CCM message, described RDI warning information can carry by Flags (8) field.
Further, as shown in Figure 5, described device can also comprise:
Wherein, described faulty equipment sign can be the ID or the bridge MAC Address of faulty equipment, but is not limited only to this.Described ID is the identity marks of unique identification MEP, is specially one of them between the 1-8192.
Described faulty equipment sign can be carried in the TLV field in the CCM message, as shown in Figure 3, increases the TLV field between described Interface TLV and End TLV, carries the faulty equipment sign in the described TLV field; The length of described TLV field is determined according to the number of faulty equipment sign.The number of the faulty equipment sign of carrying in the same CCM message can be for one or more; Wherein, when not receiving the CCM message of a plurality of MEP in RMEP (is generally three cycles) at the fixed time, the number of the faulty equipment sign of carrying in the CCM message that RMEP sends is a plurality of.
Further, as shown in Figure 5, described device can also comprise:
Wherein, described second Link State represents that the Link State between self and described first equipment is one way link or does not break down, described device is according to described second Link State, can know whether the link between self and described first equipment breaks down, thereby provide reference frame for network operation.
Further, the described module 405 that is provided with can comprise:
Comparing unit 4051 is used for more described first Link State and described second Link State;
Updating block 4052 is used for when described first Link State and described second Link State are inconsistent second Link State in the described memory module 404 being updated to described first Link State.
Further, described device can also comprise:
Add module 406, be used for when not receiving the 2nd CCM message that second equipment sends in the given time, the device identification of described second equipment is identified as faulty equipment, add in the 3rd CCM message that carries Trouble Report;
Sending module 407 is used for described the 3rd CCM message and sends to described second equipment.
In the present embodiment, described device and described first equipment are positioned at same MA, and described MA can be VLAN; The imbody form of described device is MEP, and the imbody form of described first equipment is RMEP, but is not limited only to this.
Embodiment of the invention ethernet link failure detector, behind the CCM message that carries Trouble Report that first equipment that receives sends, judge and whether carry the faulty equipment sign in the described CCM message, when carrying the faulty equipment sign in the described CCM message, whether the device identification of judging self is identical with faulty equipment sign in the described CCM message, have only when self device identification and described faulty equipment to identify when identical, know that just first Link State between self and described first equipment is an one way link.Compared with prior art, the present invention can identify according to the faulty equipment in the CCM message that carries Trouble Report, determine to occur in the Ethernet position of one way link, can avoid the wrong report of link failure, thereby the link that breaks down is accurately located, for network operation provides reliable reference frame; In addition, can also upgrade the Link State between self and first equipment of self maintained according to the link failure detection result, thereby can facilitate for network operation further.
The above-mentioned method embodiment that provides can be provided the ethernet link failure detector that the embodiment of the invention provides.Ethernet link fault detection method that the embodiment of the invention provides and device go for the ethernet link that breaks down is detected and locatees, but are not limited only to this.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. an ethernet link fault detection method is characterized in that, comprising:
Receive the first detection of connectivity message CCM message that carries Trouble Report that first equipment sends;
Whether the device identification of judging self is identical with faulty equipment sign in the described CCM message, when described self device identification and described faulty equipment identifies when identical, knows that first Link State between self and described first equipment is an one way link; When described self device identification and described faulty equipment sign not simultaneously, know that first Link State between self and described first equipment is not for breaking down.
2. method according to claim 1 is characterized in that, before whether the faulty equipment sign in the described device identification of judging self and a described CCM message is identical, also comprises:
Judge and whether carry the faulty equipment sign in the described CCM message;
If carry the faulty equipment sign in the described CCM message, know that then first Link State between self and described first equipment is an one way link;
If carry the faulty equipment sign in the described CCM message, then carry out and describedly judge that whether identical device identification of self and faulty equipment in the described CCM message identify action.
3. method according to claim 1 and 2 is characterized in that, also comprises:
In memory module, store second Link State between self and described first equipment in advance;
According to described first Link State described second Link State is set.
4. method according to claim 3 is characterized in that, describedly according to described first Link State described second Link State is set and comprises:
More described first Link State and described second Link State;
When described first Link State is consistent with described second Link State, keep described second Link State constant;
When described first Link State and described second Link State are inconsistent, second Link State in the described memory module is updated to described first Link State.
5. method according to claim 1 and 2 is characterized in that, also comprises:
When the 2nd CCM message that second equipment of not receiving in the given time sends, the device identification of described second equipment is identified as faulty equipment, add in the 3rd CCM message that carries Trouble Report;
Described the 3rd CCM message is sent to described second equipment.
6. an ethernet link failure detector is characterized in that, comprising:
Receiver module is used to the CCM message that carries Trouble Report that first equipment that receives sends;
First judge module, be used for judging whether the device identification of self is identical with the faulty equipment sign of a described CCM message, when described self device identification and described faulty equipment identifies when identical, know that first Link State between self and described first equipment is an one way link; When described self device identification and described faulty equipment sign not simultaneously, know that first Link State between self and described first equipment is not for breaking down.
7. device according to claim 6 is characterized in that, also comprises:
Second judge module is used for judging whether a described CCM message carries faulty equipment sign, when not carrying the faulty equipment sign in the described CCM message, knows that first Link State between self and described first equipment is an one way link; When carrying the faulty equipment sign in the described CCM message, described first judge module is judged.
8. according to claim 6 or 7 described devices, it is characterized in that, also comprise:
Memory module is used for storing in advance second Link State between self and described first equipment;
Module is set, is used for described second Link State being set according to described first Link State.
9. device according to claim 8 is characterized in that, the described module that is provided with comprises:
Comparing unit is used for more described first Link State and described second Link State;
Updating block is used for when described first Link State and described second Link State are inconsistent second Link State in the described memory module being updated to described first Link State.
10. according to claim 6 or 7 described devices, it is characterized in that, also comprise:
Add module, be used for when not receiving the 2nd CCM message that second equipment sends in the given time, the device identification of described second equipment is identified as faulty equipment, add in the 3rd CCM message that carries Trouble Report;
Sending module is used for described the 3rd CCM message is sent to described second equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010147557 CN101820368A (en) | 2010-04-08 | 2010-04-08 | Ethernet link failure detection method and device |
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| CN 201010147557 CN101820368A (en) | 2010-04-08 | 2010-04-08 | Ethernet link failure detection method and device |
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| WO2016065752A1 (en) * | 2014-10-27 | 2016-05-06 | 中兴通讯股份有限公司 | Method and device for detecting link state, and storage medium |
| CN107370636A (en) * | 2016-05-12 | 2017-11-21 | 华为技术有限公司 | Link State determines method and apparatus |
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Application publication date: 20100901 |