CN101267363A - Loop testing method, system and device - Google Patents
Loop testing method, system and device Download PDFInfo
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- CN101267363A CN101267363A CNA2008101048638A CN200810104863A CN101267363A CN 101267363 A CN101267363 A CN 101267363A CN A2008101048638 A CNA2008101048638 A CN A2008101048638A CN 200810104863 A CN200810104863 A CN 200810104863A CN 101267363 A CN101267363 A CN 101267363A
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Abstract
The invention provides a method for loop test, comprising: a home end OAM entity generates loop test message after starting a remote end loop; the message carries special information for identify the loop test message; then the home end OAM entity transmits the generated loop test message to the remote end OAM entity and process a statistic for the number of the loop test messages; the remote end OAM entity returns the received loop test message to the home end OAM entity, processing a statistic for the number of the returned loop test messages, and obtaining a loop test result according to the number of the self-transmitted loop test messages and the number of the loop test messages returned by the remote end OAM entity. In addition, the invention also provides a loop test system and home end OAM entity. This invention can reduce the cost of the loop test and enhance precision of the loop test.
Description
Technical field
The present invention relates to ethernet operation, administer and maintain (OAM) technology, relate in particular to loop testing method, system and device in the Ethernet OAM.
Background technology
Ethernet OAM is a kind of agreement that is used to detect Ethernet direct connected link state that IEEE802.3ah formulates, it is operated in data link layer, come the reporting ent state by regularly mutual OAM Protocol Data Unit (OAMPDU) between the equipment, make network manager's supervising the network effectively.The basic operation of Ethernet OAM comprises: set up Ethernet OAM connection, link monitoring, far-end fault detect and remote loopback.Wherein, remote loopback carries out setting up on the Ethernet OAM connection basis, and the process that starts remote loopback is as follows: local terminal OAM entity is initiated the remote loopback starting command to far end OAM solid; Enter loopback mode after far end OAM solid is received, and return remote loopback startup response to local terminal OAM entity.Under loopback mode, except that the OAMPDU message, far end OAM solid returns former road to all messages from local terminal OAM entity; For the message that far end OAM solid is returned, local terminal OAM entity is no longer transmitted, in order to avoid network is impacted.After remote loopback started, local terminal OAM entity just can send message to far end OAM solid and carry out loopback test, determines current network state according to test result then.Regularly carry out loopback test and can in time find network failure, help the user to fix a breakdown as early as possible.
At present, loopback test scheme commonly used is as follows: external testing tool on local terminal OAM entity, squeeze into test traffic by testing tool to far end OAM solid, far end OAM solid receives that the back returns to the former road of local terminal OAM entity, and the flow quantity that flow quantity that local terminal OAM entity is squeezed into by statistics and far end OAM solid are returned obtains test result.
Though such scheme can be realized loopback test, have following defective: at first, the user needs extra buying testing tool, and cost is higher; Secondly, the scope of application of this scheme is narrower, only be applicable to cleaner network environment, be not suitable for the network environment that has other flow, because: when having other flow in the network, actually or local terminal OAM entity can't be distinguished other flow of test traffic that far end OAM solid is returned, thereby cause the test traffic mistake of statistics, can not get test result accurately.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of loop testing method, system and device, reduce the cost of loopback test, improve the accuracy of loopback test.
For achieving the above object, technical scheme provided by the invention is as follows:
A kind of loop testing method comprises:
After starting remote loopback, local terminal OAM entity generates the loopback test message, carry the customizing messages that is used for identifying the loopback test message in this message, local terminal OAM entity sends to far end OAM solid with the loopback test message that generates then, and adds up the loopback test message number of sending;
Far end OAM solid returns to local terminal OAM entity with the loopback test message of receiving;
The customizing messages identification loopback test packet of local terminal OAM entity by carrying in the message, the loopback test message number returned of statistics far end OAM solid, and the loopback test message number that the loopback test message number of sending according to self and far end OAM solid are returned obtains the loopback test result.
Described customizing messages is a target MAC (Media Access Control) address.
Described far end OAM solid further comprises before the loopback test message of receiving is returned to local terminal OAM entity: far end OAM solid judges that whether the message of receiving belongs to the OAMPDU message, if belong to, then carries out dissection process to the message of receiving; Otherwise, the message of receiving is returned to local terminal OAM entity, wherein, described loopback test message belongs to non-OAMPDU message.
This method further comprises: local terminal OAM entity carries different sequence numbers respectively in each the loopback test message that sends; Local terminal OAM entity is distinguished each different loopback test message by the sequence number that carries in the message after receiving the loopback test message that far end OAM solid returns, and the forwarding time delay of determining network according to the transmitting time and the time of reception difference of each loopback test message.
A kind of loop-back test system comprises local terminal OAM entity and far end OAM solid, and described local terminal OAM entity comprises message generation unit, packet sending unit, message receiving element and loopback monitoring unit, wherein,
The message generation unit is used to generate the loopback test message, and the loopback test message that generates is sent to packet sending unit, carries the customizing messages that is used for identifying the loopback test message in the described loopback test message;
Packet sending unit is used for the loopback test message is sent to far end OAM solid, and carries out loopback test message transmission record at the loopback monitoring unit;
The message receiving element is used to receive the message that far end OAM solid is returned, and discerns the loopback test packet by the customizing messages that carries in the message, and the loopback test message of receiving is sent to the loopback monitoring unit;
The loopback monitoring unit, the loopback test message number that is used to add up the loopback test message number of sending and returns obtains the loopback test result according to loopback test message number of sending and the loopback test message number returned;
Described far end OAM solid comprises: message receiving element and message loopback unit, wherein,
The message receiving element is used to receive the loopback test message from local terminal OAM entity, and the loopback test message of receiving is sent to message loopback unit;
Message loopback unit, the loopback test message that is used for receiving returns to local terminal OAM entity.
Described message generation unit comprises: message module units and be used for the sequence number generation unit of formation sequence number, wherein,
The message module units is used for obtaining different sequence numbers from the sequence number generation unit and is encapsulated into the different loopback test messages, and the loopback test message after will encapsulating sends to packet sending unit;
The loopback monitoring unit, after receiving the loopback test message that the message receiving element sends, distinguish each different loopback test message by the sequence number that carries in the message, and the forwarding time delay of determining network according to the transmitting time and the time of reception difference of each loopback test message.
Described far end OAM solid further comprises: message process unit is used for the message of receiving is carried out dissection process;
The message receiving element of far end OAM solid, receive message from local terminal OAM entity after, judge that whether the message receive belongs to the OAMPDU message, if belong to, then sends to message process unit with the message of receiving; Otherwise, the message of receiving is sent to message loopback unit, wherein, described loopback test message belongs to non-OAMPDU message.
A kind of local terminal OAM entity is used for carrying out loopback test with far end OAM solid, comprising: message generation unit, packet sending unit, message receiving element and loopback monitoring unit, wherein,
The message generation unit is used to generate the loopback test message, and the loopback test message that generates is sent to packet sending unit, carries the customizing messages that is used for identifying the loopback test message in the described loopback test message;
Packet sending unit is used for the loopback test message is sent to far end OAM solid, and carries out loopback test message transmission record at the loopback monitoring unit;
The message receiving element is used to receive the message that far end OAM solid is returned, and discerns the loopback test packet by the customizing messages that carries in the message, and the loopback test message of receiving is sent to the loopback monitoring unit;
The loopback monitoring unit, the loopback test message number that is used to add up the loopback test message number of sending and returns obtains the loopback test result according to loopback test message number of sending and the loopback test message number returned.
Described message generation unit comprises: message module units and be used for the sequence number generation unit of formation sequence number, wherein,
The message module units is used for obtaining different sequence numbers from the sequence number generation unit and is encapsulated into the different loopback test messages, and the loopback test message after will encapsulating sends to packet sending unit;
The loopback monitoring unit, after receiving the loopback test message that the message receiving element sends, distinguish each different loopback test message by the sequence number that carries in the message, and the forwarding time delay of determining network according to the transmitting time and the time of reception difference of each loopback test message.
This shows, adopt the scheme of utilizing the loopback test message to carry out loopback test provided by the invention, need not to squeeze into test traffic, can reduce the expense of extra buying testing tool, reduce the loopback test cost by extra testing tool; And, the scope of application of scheme provided by the present invention is unrestricted, be not only applicable to cleaner network environment, also be applicable to the network environment that has other flow, even under the network environment that has other flow, local terminal OAM entity also can be distinguished loopback test message and other message easily, has avoided the generation of mistake of statistics situation, has improved the loopback test accuracy.
Description of drawings
Fig. 1 is the loopback test methods flow chart in the embodiment of the invention;
Fig. 2 is the loopback test message format schematic diagram in the embodiment of the invention;
Fig. 3 is the loop-back test system structural representation in the embodiment of the invention;
Fig. 4 shows the another kind of loop-back test system structural representation in the embodiment of the invention.
Embodiment
Basic thought of the present invention is: newly-increased a kind of special-purpose message is as the loopback test message, and after remote loopback started, local terminal OAM entity generated special loopback test message, and the loopback test message that generates is sent to far end OAM solid; After far end OAM solid is received, the loopback test message of receiving is returned to local terminal OAM entity; The loopback test message that loopback test message that local terminal OAM entity sends according to self and far end OAM solid are returned obtains test result.
Adopt special loopback test message to carry out loopback test, need not to squeeze into test traffic, can reduce the expense of extra buying testing tool, reduce the loopback test cost by testing tool; And even under the network environment that has other flow, local terminal OAM entity also can be distinguished test packet and other message easily, has avoided the generation of mistake of statistics situation, has improved the loopback test accuracy.
For making purpose of the present invention, technical scheme and advantage clearer, the embodiment that develops simultaneously with reference to the accompanying drawings is described in further detail the present invention.
Fig. 1 shows the loop testing method flow chart in the embodiment of the invention, may further comprise the steps:
Step 101: local terminal OAM entity is set up OAM with far end OAM solid and is connected.
Step 102: local terminal OAM entity is initiated the remote loopback starting command to far end OAM solid; Far end OAM solid enters loopback mode after receiving the remote loopback starting command, and returns remote loopback startup response to local terminal OAM entity, and two ends enter the loopback test state.
Step 103: local terminal OAM entity generates the loopback test message, and the loopback test newspaper that generates is sent to far end OAM solid, and carries out the loopback test message and send record, the loopback test message number of sending as statistics.
Wherein, the loopback test message can identify by carrying customizing messages, such as, in the loopback test message, carrying specific purpose medium access control (MAC) address, local terminal OAM entity and far end OAM solid are distinguished loopback control message by target MAC (Media Access Control) address.
Step 104: after far end OAM solid is received message from local terminal OAM entity, judge that whether the message of receiving belongs to the OAMPDU message, if belong to the OAMPDU message, then carries out dissection process; Otherwise, the former road of the message of receiving is returned to local terminal OAM entity.Here, the loopback test message belongs to non-OAMPDU message, and far end OAM solid receives that the loopback test message that directly send local terminal OAM entity the back returns to local terminal OAM entity.
Step 105: the loopback test messages transmitted to CPU that local terminal OAM entity returns far end OAM solid, CPU obtains analysis result according to loopback test message of receiving and the loopback test message of self transmission record.Such as, the loopback test message number that the statistics far end OAM solid is returned is analyzed Link State in conjunction with far end OAM solid loopback test message number of returning and the loopback test message number of self sending, and obtains test result.
Further, in step 103, local terminal OAM entity can also all carry a different sequence number in each the loopback test message that sends, be used for when reclaiming the loopback test message, discerning, such as first loopback test sequence number of message of sending is 1, and the follow-up loopback test sequence number of message of sending increases progressively on 1 basis successively.
In step 105, after local terminal OAM entity is received the loopback test message that far end OAM solid returns, can distinguish each different loopback test message by the sequence number that carries in the message, the forwarding time delay of determining network according to the transmitting time and the time of reception difference of each loopback test message, and carry out the delay variation analysis.
Fig. 2 shows a kind of example format of loopback test message.Need to prove that the concrete form of loopback test message, length and the loopback test message number that sends to far end OAM solid all can be provided with according to the actual requirements, the present invention does not limit this.
Correspondingly, the present invention also provides a kind of loop-back test system, and its structure comprises local terminal OAM entity and far end OAM solid referring to shown in Figure 3.Preferably, local terminal OAM entity comprises message generation unit, packet sending unit, message receiving element and loopback monitoring unit, wherein,
The message generation unit is used to generate the loopback test message, and the loopback test message that generates is sent to packet sending unit, carries the customizing messages that is used for identifying the loopback test message in the described loopback test message;
Packet sending unit is used for the loopback test message is sent to far end OAM solid, and carries out loopback test message transmission record at the loopback monitoring unit;
The message receiving element is used to receive the message that far end OAM solid is returned, and discerns the loopback test packet by the customizing messages that carries in the message, and the loopback test message of receiving is sent to the loopback monitoring unit;
The loopback monitoring unit, the loopback test message number that is used to add up the loopback test message number of sending and returns obtains the loopback test result according to loopback test message number of sending and the loopback test message number returned.
Preferably, far end OAM solid comprises: message receiving element and message loopback unit, wherein,
The message receiving element is used to receive the loopback test message from local terminal OAM entity, and the loopback test message of receiving is sent to message loopback unit;
Message loopback unit, the loopback test message that is used for receiving returns to local terminal OAM entity.
Referring to shown in Figure 4, the message generation unit of local terminal OAM entity can comprise: message module units and be used for the sequence number generation unit of formation sequence number, wherein,
The message module units is used for obtaining different sequence numbers from the sequence number generation unit and is encapsulated into the different loopback test messages, and the loopback test message after will encapsulating sends to packet sending unit;
The loopback monitoring unit, after receiving the loopback test message that the message receiving element sends, distinguish each different loopback test message by the sequence number that carries in the message, and the forwarding time delay of determining network according to the transmitting time and the time of reception difference of each loopback test message.
As shown in Figure 4, far end OAM solid can further comprise: message process unit is used for the message of receiving is carried out dissection process;
The message receiving element of far end OAM solid, receive message from local terminal OAM entity after, judge that whether the message receive belongs to OAMPDU message (this operation specifically can be realized by chip), if belong to, then sends to message process unit with the message of receiving; Otherwise, the message of receiving is sent to message loopback unit, wherein, described loopback test message belongs to non-OAMPDU message.
The above has carried out further detailed description to purpose of the present invention, technical scheme and beneficial effect; institute is understood that; the above is not in order to restriction the present invention; within the spirit and principles in the present invention all; any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1, a kind of loop testing method is characterized in that, comprising:
After starting remote loopback, local terminal OAM entity generates the loopback test message, carry the customizing messages that is used for identifying the loopback test message in this message, local terminal OAM entity sends to far end OAM solid with the loopback test message that generates then, and adds up the loopback test message number of sending;
Far end OAM solid returns to local terminal OAM entity with the loopback test message of receiving;
The customizing messages identification loopback test packet of local terminal OAM entity by carrying in the message, the loopback test message number returned of statistics far end OAM solid, and the loopback test message number that the loopback test message number of sending according to self and far end OAM solid are returned obtains the loopback test result.
2, method according to claim 1 is characterized in that, described customizing messages is a target MAC (Media Access Control) address.
3, method according to claim 1, it is characterized in that, described far end OAM solid further comprises before the loopback test message of receiving is returned to local terminal OAM entity: far end OAM solid judges whether the message of receiving belongs to the OAMPDU message, if belong to, then the message of receiving is carried out dissection process; Otherwise, the message of receiving is returned to local terminal OAM entity, wherein, described loopback test message belongs to non-OAMPDU message.
4, according to each described method of claim 1 to 3, it is characterized in that this method further comprises: local terminal OAM entity carries different sequence numbers respectively in each the loopback test message that sends; Local terminal OAM entity is distinguished each different loopback test message by the sequence number that carries in the message after receiving the loopback test message that far end OAM solid returns, and the forwarding time delay of determining network according to the transmitting time and the time of reception difference of each loopback test message.
5, a kind of loop-back test system comprises local terminal OAM entity and far end OAM solid, it is characterized in that, described local terminal OAM entity comprises message generation unit, packet sending unit, message receiving element and loopback monitoring unit, wherein,
The message generation unit is used to generate the loopback test message, and the loopback test message that generates is sent to packet sending unit, carries the customizing messages that is used for identifying the loopback test message in the described loopback test message;
Packet sending unit is used for the loopback test message is sent to far end OAM solid, and carries out loopback test message transmission record at the loopback monitoring unit;
The message receiving element is used to receive the message that far end OAM solid is returned, and discerns the loopback test packet by the customizing messages that carries in the message, and the loopback test message of receiving is sent to the loopback monitoring unit;
The loopback monitoring unit, the loopback test message number that is used to add up the loopback test message number of sending and returns obtains the loopback test result according to loopback test message number of sending and the loopback test message number returned;
Described far end OAM solid comprises: message receiving element and message loopback unit, wherein,
The message receiving element is used to receive the loopback test message from local terminal OAM entity, and the loopback test message of receiving is sent to message loopback unit;
Message loopback unit, the loopback test message that is used for receiving returns to local terminal OAM entity.
6, system according to claim 5 is characterized in that, described message generation unit comprises: message module units and be used for the sequence number generation unit of formation sequence number, wherein,
The message module units is used for obtaining different sequence numbers from the sequence number generation unit and is encapsulated into the different loopback test messages, and the loopback test message after will encapsulating sends to packet sending unit;
The loopback monitoring unit, after receiving the loopback test message that the message receiving element sends, distinguish each different loopback test message by the sequence number that carries in the message, and the forwarding time delay of determining network according to the transmitting time and the time of reception difference of each loopback test message.
7, according to claim 5 or 6 described systems, it is characterized in that described far end OAM solid further comprises: message process unit is used for the message of receiving is carried out dissection process;
The message receiving element of far end OAM solid, receive message from local terminal OAM entity after, judge that whether the message receive belongs to the OAMPDU message, if belong to, then sends to message process unit with the message of receiving; Otherwise, the message of receiving is sent to message loopback unit, wherein, described loopback test message belongs to non-OAMPDU message.
8, a kind of local terminal OAM entity is used for carrying out loopback test with far end OAM solid, it is characterized in that, comprising: message generation unit, packet sending unit, message receiving element and loopback monitoring unit, wherein,
The message generation unit is used to generate the loopback test message, and the loopback test message that generates is sent to packet sending unit, carries the customizing messages that is used for identifying the loopback test message in the described loopback test message;
Packet sending unit is used for the loopback test message is sent to far end OAM solid, and carries out loopback test message transmission record at the loopback monitoring unit;
The message receiving element is used to receive the message that far end OAM solid is returned, and discerns the loopback test packet by the customizing messages that carries in the message, and the loopback test message of receiving is sent to the loopback monitoring unit;
The loopback monitoring unit, the loopback test message number that is used to add up the loopback test message number of sending and returns obtains the loopback test result according to loopback test message number of sending and the loopback test message number returned.
9, local terminal OAM entity according to claim 8 is characterized in that, described message generation unit comprises: message module units and be used for the sequence number generation unit of formation sequence number, wherein,
The message module units is used for obtaining different sequence numbers from the sequence number generation unit and is encapsulated into the different loopback test messages, and the loopback test message after will encapsulating sends to packet sending unit;
The loopback monitoring unit, after receiving the loopback test message that the message receiving element sends, distinguish each different loopback test message by the sequence number that carries in the message, and the forwarding time delay of determining network according to the transmitting time and the time of reception difference of each loopback test message.
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