CN102215130B - CFD (connectivity fault detection) protocol configuration method and device thereof - Google Patents
CFD (connectivity fault detection) protocol configuration method and device thereof Download PDFInfo
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Abstract
The invention discloses a CFD (connectivity fault detection) protocol configuration method and a device thereof. The method comprises the followings steps: when maintenance domains with the same maintenance domain levels are configured for devices in a VLAN (virtual local area network), a primary device and each slave device respectively receive configuration orders of maintenance domain level, and the maintenance domain level of the device is configured according to the orders; the primary device in the VLAN transmits CC (continuity check) massages with the maintenance domain level, each slave device returns to the LT (link trace) massage after receiving the CC massages, wherein an intermediate device which receives the LT massage returns an LTR (link trace reply) massage to a transmitting party device of the LT massage; the primary device configures an outbound maintenance end point on a port which transmits CC massages, ports of slave devices which receive maintenance intermediate points and reply LTR massage exist, the maintenance intermediate point is configured on the port, and maintenance intermediate points are configured on other ports which have the same maintenance domain levels with the maintenance intermediate points; and other slave devices configure outbound maintenance end points on ports which receive CC massages and do not reply the LTR massages. By adopting the method and device provided by the invention, the auto configuration of CFD protocol can be realized.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of CFD protocol configuration method and device thereof.
Background technology
CFD is the abbreviation of Connectivity Fault Detection (connection error detection), follows CFM (Connectivity Fault Management, the connectivity fault management) agreement of IEEE802.1ag and the Y.1731 agreement of ITU-T.It is based on VLAN (Virtual Local Area Network on a kind of two layers of link, VLAN) end-to-end OAM (Operations, Administration and Maintenance, Operations, Administration and Maintenance) mechanism, be mainly used in detecting connectivity of link in double layer network, confirm fault and determine the position that fault occurs.
The concept below the CFD agreement related to is simply introduced.
Maintenance field (Maintenance Domain, MD): be mainly to carry out for limiting the network range that is communicated with error detection work, maintenance field is used " maintaining end point " to limit the scope of maintenance field, between maintenance field, with " safeguarding domain name ", mutually distinguishes.Position for accurate positioning failure network, maintenance field has been introduced the concept of maintenance field rank (Level), the maintenance field rating value is larger, the scope of this maintenance field is also larger, less other maintenance field of level can be nested in than in the maintenance field of large level, but both scopes can not be intersected.
Safeguard collection (Maintenance Association, MA): in a maintenance field, the user can arrange as required one or more and safeguard collection, in general safeguard to collect and serve a VLAN, comprise a plurality of " maintenance points " in maintenance field, safeguard to collect and mutually distinguish with " safeguarding domain name "+" safeguarding set name ".
Service Instance (Service Instance, SI): Service Instance is the set of Service Access Point, and it belongs to certain the maintenance collection in certain maintenance field.The title of Service Instance identifies with an integer, has represented that the maintenance with appointment integrates the communication with detection work entity as object.The maintenance field at Service Instance place and maintenance collection, determined Service Instance CFD protocol massages to be processed rank and affiliated VLAN.
Maintenance point (Maintenance Point, MP): maintenance point is configured on the device port in maintenance field, be under the jurisdiction of and safeguard collection, be divided into " maintaining end point " (Maintenance association End Point, MEP) and " Maintenance Intermediate Point " (Maintenance association Intermediate Point, MIP).Wherein:
Maintaining end point: use MEP ID (ID must be integer) to be identified, be configured in the Service Instance of appointment, be used for identifying the border of service object network.Maintaining end point place Service Instance, determined the rank that maintaining end point is processed and E-Packeted.Maintaining end point is only accepted the maintenance field rank and is less than or equal to self other message of level.Maintaining end point is divided into again introversion (Inbound) and export-oriented (Outbound) end points.Both difference are, interior is to send message by other ports on this equipment to outside to end points, and export-oriented end points is to send message by port own.
Maintenance Intermediate Point: Maintenance Intermediate Point is positioned at maintenance field inside, can not initiatively send the CFD protocol massages, and also not special sign is distinguished mutually, but can process and respond the CFD protocol massages.Service Instance under Maintenance Intermediate Point has been determined VLAN attribute and the rank of this Maintenance Intermediate Point received packet.
Maintaining end point list (MEP list): the maintaining end point list is to limit the likely maintaining end point set of appearance of institute in the maintenance service example, it has comprised the named range of all maintaining end points in the Service Instance, all maintaining end points on any distinct device in same Service Instance, all must be included in this list, and MEP ID each other can not repeat.If MEP finds that according to the CFD message received source MEP is not in the MEP of this end points list, this message will be dropped.
The CFD function mainly comprises:
The continuity measuring ability: periodic maintaining end point in same Service Instance sends message.Receive CC message (the Continuity Check Message of far-end MEP for the first time, the continuity detection messages) time, Local MEP can think that both set up neighbours, this far-end MEP is joined in the Remote MEP list (being far-end MEP list) of oneself.Do not receive the far-end message if there are continuous 3.5 messages to send the cycle later, think disconnecting and output journal report.
The loopback detection function: this function class is like the Ping order.Send LB message (Loopback Message, loopback message) to specifying far-end from Local MEP, return to a LBR (Loopback Reply, loopback is replied) message after far-end MEP receives to this Local MEP.
The link trace function: send LT (Link Trace, link trace) message from Local MEP, direction is a far-end MEP.When this message process MIP, all order MIP to reply one to the source MEP that sends the LT message and comprise MIP bridge MAC (Medium Access Control, the media access control) LTR of address (Link Trace Reply, link trace is replied) message.So just can determine the path of this link.
Warning inhibit feature: in order to reduce the number of alarms that reports of discovering network fault appearance later, do not receive at 3.5 CC messages the CC message that the remote maintenance end points is sent in the transmission cycle, just start periodically to send AIS (Alarm Indication Signal, alarm indication signal) message, sending direction is contrary with the CC message.Maintaining end point, after receiving the AIS message, can suppress the fault warning of local terminal, and continues to send the AIS message.If each maintaining end point has been received the CC message at 3.5 CC messages in the transmission cycle again, just stop sending the AIS message.
Fig. 1 shows a kind of group-network construction, and 4 equipment under tests wherein (Device Under Test, DUT) are respectively DUT1～DUT4, and the corresponding maintenance field scope of maintenance field rank MD3 is less than the maintenance span of maintenance field rank MD5.After 4 DUT in Fig. 1 are carried out to the CFD protocol configuration, when the link between any DUT disconnects, alarm will occur in the direct-connected DUT of this both link ends, so just can judge the faulty link position, thereby has facilitated the maintenance management of double layer network.
The CFD technology of using at present, CFD in whole network disposes and safeguards, all rely on manual configuration, need to adopt manual mode to carry out the configuration distributings such as maintenance field title, maintenance field rank, affiliated VLAN, maintaining end point list, CFD enable, alarm suppresses to enable, Ethernet enables to the overall situation, then also will be on the port of equipment configuring maintenance end points title, affiliated maintenance field, inside/outside to attribute, continuity enable, maintaining end point enables etc., above configuration need to be configured on all maintenance field equipment.Below listed some CFD protocol configuration orders commonly used, as shown in Figure 2, can above input these CFD protocol configuration orders at main frame (Host), and send to corresponding DUT by Host:
[DUT1]cfd?enable
This order is the CFD enable command, for enabling the CFD function on DUT1;
[DUT1]cfd?ais?enable
This order is the AIS enable command, for enabling the AIS function on DUT1;
[DUT1]cfd?md?MD_A?level?5
This order is maintenance field (MD) configuration order, and for the MD that configures DUT1 MD_A by name, the maintenance field rank is 5;
[DUT1]cfd?ma?MA_Amd?MD_A?vlan?100
This order is to safeguard collection (MA) configuration order, and for the MA that configures DUT1 MA_A by name, this MA belongs to maintenance field MD_A, serves VLAN vlan 100;
[DUT1]cfd?service-instance?1?md?MD_Ama?MA_A
This order is the Service Instance configuration order, for the Service Instance id that configures DUT1, is 1, belongs to maintenance field MD_A and safeguards collection MA_A;
[DUT1]cfd?meplist?1?to?8000?service-instance?1
This order is the order of maintaining end point list configuration, for the maintaining end point list that configures DUT1, is meplist 1, and the named range of its maintaining end point is 1 to 8000, belongs to Service Instance service-instance 1;
[DUT1-P1]cfd?mep?1001?service-instance?1?inbound
This order is that service endpoints is interior to the attribute configuration order, for the service endpoints 1001 that belongs to Service Instance service-instance 1 on the P1 port by DUT1, is configured to interior to service endpoints;
[DUT1-P1]cfd?mep?service-instance?1?mep?1001?enable
This order is the service endpoints enable command, for belonging to the service endpoints 1001 of Service Instance service-instance 1 on the P1 port that enables DUT1;
[DUT1-P1]cfd?ais-track?link-status?level?7
This order is EAIS link rank configuration order, and following the tracks of the Link State rank for the AIS of the P1 port that configures DUT1 is 7;
[DUT1-P1]cfd?ais-track?link-status?period?60
This order is EAIS tracking cycle configuration order, and the cycle of following the tracks of Link State for the AIS of the P1 port that configures DUT1 is 60 seconds;
[DUT1-P1]cfd?ais-track?link-status?vlan?100
This order is the VLAN configuration order under EAIS, and the VLAN of following the tracks of under Link State for the EAIS of the P1 port that configures DUT1 is vlan 100.
For network in large scale, when application CFD agreement, generally all devices can be divided into to some maintenance fields, then for membership configuring maintenance territory rank and other configuration informations of these maintenance fields, this layoutprocedure is loaded down with trivial details, if occur that in layoutprocedure configuration error will cause CFD neighbours to set up.In the situation that network size is large, equipment is more, the very difficult investigation reason that makes mistake.And when network topology change to be detected, the maintenance field partition of the level needs manually again to plan and to distribute, and corresponding configuration also needs to change in a large number.
Visible, need at present the simple CFD protocol configuration mechanism of a kind of implementation badly.
Summary of the invention
The invention provides a kind of CFD protocol configuration method and device thereof, in order to realize to a certain extent the self-configuring of CFD agreement.
CFD protocol configuration method provided by the invention, the equipment configuration be applied to as setting quantity in assigned vlan has the process of identical other maintenance field of maintenance field level, the equipment of described setting quantity comprises an equipment that is positioned at the maintenance field border and is selected as main equipment, all the other are that the method comprises from equipment:
Main equipment and each receive respectively maintenance field rank configuration order from equipment, and according to the maintenance field rank of this this equipment of command configuration;
Main equipment sends in described VLAN has other CC message of described maintenance field level, and each returns to the LT message from equipment receives the CC message, and wherein, the intermediate equipment that receives the LT message is returned to the LTR message to the transmit leg equipment of this LT message;
Main equipment is the export-oriented maintaining end point of configuration on the port that sends the CC message, existence received the LT message and replied the LTR message port from equipment, configuring maintenance intermediate point on this port, and there is configuring maintenance intermediate point on other other port of identical maintenance field level with this Maintenance Intermediate Point; Other from equipment at the export-oriented maintaining end point of port configuration of receiving the CC message and not replying the LTR message.
Communication equipment provided by the invention, the equipment configuration be applied to as setting quantity in assigned vlan has the process of identical other maintenance field of maintenance field level, and this communication equipment comprises:
The first configuration module, for receiving maintenance field rank configuration order, and according to the maintenance field rank of this this equipment of command configuration;
Message processing module (MPM) in the situation that this equipment is positioned at the maintenance field border and is selected as main equipment, sends and has other CC message of described maintenance field level in described VLAN; In the situation that this equipment is as from equipment, return to the LT message after receiving the CC message that main equipment sends, and the transmit leg to this LT message returns to the LTR message from equipment when receiving the LT message that other returns from equipment;
The second configuration module, for in the situation that this equipment as from equipment, received the LT message if exist and to reply the port of LTR message, configuring maintenance intermediate point thereon, and there is configuring maintenance intermediate point on other other port of identical maintenance field level with this Maintenance Intermediate Point; Otherwise, receiving the CC message and do not replying the export-oriented maintaining end point of configuration on the port of LTR message; In the situation that this equipment, as main equipment, configures export-oriented maintaining end point on the port that sends the CC message.
Useful technique effect of the present invention comprises:
The present invention is divided into main equipment by the equipment of pending CFD protocol configuration and from equipment, configure the maintenance field rank of each equipment by maintenance field rank configuration order, maintaining end point on each device port and Maintenance Intermediate Point configuration, by main equipment, send the CC message and respectively from the situation of device responds LT message and LTR message, carry out self-configuring, thereby in prior art, all CFD protocol configuration operations all need the manual technical scheme completed to compare, and have realized to a certain extent the automatic configuration of CFD agreement.
The accompanying drawing explanation
Fig. 1 is the networking schematic diagram of having applied the CFD agreement in prior art;
The implementation schematic diagram that Fig. 2 is CFD protocol configuration in prior art;
The CFD protocol configuration schematic flow sheet that Fig. 3 provides for the embodiment of the present invention;
The state machine state migration schematic diagram that Fig. 4 provides for the embodiment of the present invention;
Fig. 5 A～Fig. 5 E is respectively the CFD agreement self-configuring process schematic diagram in the invention process;
The schematic diagram of the configuration end message that Fig. 6 provides for the embodiment of the present invention;
The structural representation of the communication equipment that Fig. 7 provides for the embodiment of the present invention.
Embodiment
The embodiment of the present invention, based on the CFD agreement, replaces the CFD protocol configuration mechanism of complete manual mode, has realized to a certain extent the automatic configuration of CFD agreement, has solved network size when huge, the problem that the CFD protocol configuration is loaded down with trivial details.
Because CFD agreement itself just is used for solving the detection of connectivity problem of link, in the situation that loop is arranged, generally together with STP (Shortest Path Tree, shortest path tree), agreement is used in conjunction with, and CFD message itself can be blocked by STP.Therefore, owing to being deployed CFD protocol massages that network loop the causes problem that floods, do not belong to the category of solution for embodiment of the invention.
The realize target of the embodiment of the present invention is: on the equipment that forms maintenance field, by inputting a small amount of (as 1 to 2) configuration order, for the networking of pending CFD protocol configuration arranges maintenance field rank and binding VLAN, then, using one of them equipment as main equipment, by main equipment, initiate CFD agreement self-configuring process.Complete the relevant configuration of whole maintenance field by layoutprocedure.Wherein, main equipment can be specified by the keeper, can select the maintenance field edge device as main equipment.
For realizing above-mentioned target, the overall procedure of the CFD protocol configuration that the embodiment of the present invention provides can be as shown in Figure 3, in the time need in particular vlan (the following VLAN of take 100 is example), configuring the maintenance field of a certain maintenance field rank (following take level 5 as example), this flow process can comprise:
In the specific implementation, can send maintenance field rank configuration order to these equipment by Host (configuring client), so that these equipment configuring maintenance territory ranks are level 5.Can also further pass through configuration order, make port and VLAN 100 bindings (in the situation that bind with VLAN 100 before the port of these equipment, this step can be omitted) of these equipment.
In the specific implementation, can select the maintenance field edge device as main equipment by the system manager, and issue the configuration initiation command to main equipment.Main equipment, after receiving the configuration initiation command, sends the CC message that the maintenance field rank is level 5 in VLAN 100.
Each returns to the LT message from equipment receives the CC message, and wherein, the intermediate equipment that receives the LT message is returned to the LTR message to the transmit leg equipment of this LT message.At first judge whether to exist from equipment the port of receiving the LT message and replying the LTR message, if there is configuring maintenance intermediate point on this port, and there is configuring maintenance intermediate point on other other port of identical maintenance field level with this Maintenance Intermediate Point; If there is not the port of receiving the LT message and replying the LTR message from equipment, receiving the CC message and do not replying the export-oriented maintaining end point of configuration on the port of LTR message; Main equipment is the export-oriented maintaining end point of configuration on the port that sends the CC message.
After this, main equipment and each CFD that can enable it from equipment configure, thereby complete the CFD protocol configuration.Can find out, realize completing by layoutprocedure the relevant configuration process of whole maintenance field by above flow process.
Further, in order to improve accuracy and the reliability of configuration, main equipment can also be to from equipment, carrying out link trace, and in the situation that confirm correct from device link, just finally complete the CFD protocol configuration.Concrete, can improve as follows above-mentioned flow process:
Main equipment generates the maintenance point list according to the LT message received, and records the MAC Address of the bridge from equipment of returning to the LT message in the maintenance point list and arrives these two layer hop counts required from equipment.Main equipment carries out link trace to each in this list from equipment according to the maintenance point list, and each bridge MAC Address from equipment in tracking results and maintenance point list and these two layer hop counts required from equipment of arrival are compared, if consistent, enable the CFD configuration on this device port, thereby complete the CFD protocol configuration on main equipment, end message is put in concurrent delivery; Otherwise, remove completed configuration in this CFD protocol configuration process on this device port, finish this CFD protocol configuration process, the cancellation message is put in concurrent delivery.If each receives the configuration end message from equipment, enable the CFD configuration on device port separately, thereby complete the CFD protocol configuration from equipment; Cancel message if each receives configuration from equipment, remove completed configuration in this CFD protocol configuration process on this device port, and finish this CFD protocol configuration process.
Further, in order to improve the reliability of configuration, on above-mentioned process base, can also improve as follows:
Main equipment can be in setting duration t1 the cycle send the CC message that the maintenance field rank is level 5, can receive this CC message to guarantee each from equipment.After a period of time t2 (t2 can be less than t1) after this setting duration t1, main equipment just starts, according to the maintenance point list, each in this list carried out to link trace from equipment, like this, can guarantee to a certain extent that on the one hand each equipment all can receive the CC message and carry out respective handling (as transparent transmission CC message and reply the LT message), on the other hand, t2 is set to be less than the time that t1 can save the CFD configuration flow.From equipment, from receiving first CC start of heading, reaching while setting duration t3, configure MIP or MEP on corresponding port according to aforementioned rule, concrete, if there is the port of receiving the LT message and replying the LTR message from equipment, on this port, configure MIP, and have on other other port of identical maintenance field level and configure MIP with this MIP; Other from equipment at the export-oriented MEP of port configuration that received the CC message and do not reply the LTR message.Wherein, t3 is not less than t1.
Further, for reasonability and the flexibility that improves configuration flow, can interrupt configuration process when abnormal occur in layoutprocedure, also can pass through as required transmitting order to lower levels mode interrupt configuration process.
Concrete, layoutprocedure occurs that the specific implementation of interrupt configuration process when abnormal can be: if main equipment never receives the LT message returned from equipment, remove completed configuration in this CFD protocol configuration process on this device port, finish this CFD protocol configuration process, the cancellation message is put in concurrent delivery.After this, from equipment receives configuration cancellation message, remove completed configuration in this CFD protocol configuration process on this device port, and finish this CFD protocol configuration process.
Specific implementation by transmitting order to lower levels mode interrupt configuration process can be: by Host, to main equipment and each, from equipment, send the configuration mandatum cassatorium, main equipment and each are from equipment receives configuration and cancels message, remove completed configuration in this CFD protocol configuration process on this device port, and finish this CFD protocol configuration process.
In above-mentioned embodiment, need to survey group network topological structure by the message interaction of CFD agreement itself.But under general state, equipment in networking can not monitored the CFD protocol massages, for this situation, introduced state machine mechanism in the embodiment of the present invention, distinguish the state in " automatically before configuration ", " automatically in configuration " and each stages such as " automatically after configurations " of equipment by different conditions, and introduce a series of message-handling processor systems for each state, realize CFD agreement self-configuring process.
In this state machine mechanism, the equipment in networking may be in several states such as Inactive (inactive), Main_Trial (main equipment trial), Main_Gather (main equipment collection), Slave_Feedback (from the equipment feedback), Finish (completing).Wherein: Main_Trial and Main_Gather are peculiar by main equipment, and main equipment refers to the promoter of whole self-configuring behavior here.In a self-configuring behavior, whole networking only has a main equipment, and other equipment are from equipment.Be mainly that the message sent according to main equipment obtains own positional information networking from equipment, carry out the CFD protocol configuration so that follow-up.
Referring to Fig. 4, for the state machine state that the embodiment of the present invention provides is moved schematic diagram, wherein:
Equipment in networking (main equipment and each from equipment) usually the time in the Finsh state, in the time need to carrying out the CFD protocol configuration to the equipment in certain maintenance field, send configuration order by Host to these equipment, these equipment proceed to Inactive state (as shown in A1) from the Finsh state after receiving this order;
After main equipment enters the Inactive state, wait initiation command to be configured, and, after receiving the configuration initiation command, enter Main_Trial state (as shown in A2);
Main equipment sends the CC message after entering the Main_Trial state, and opening timing device Timer1 (timing length can be made as 60 seconds).During timer Timer1 timing, the cycle sends the CC message, and continues to monitor the LT message from device replied, is receiving that first LT message enters Main_Gather state (as shown in A3) later;
Main equipment, under the Main_Gather state, is set up maintenance point verification table, and the source address of the LT message that receives is collected in maintenance point verification table.After main equipment is received last LT message, (be Timer1 overtime time) is maybe after a period of time of receiving last LT message (as 10 seconds), allly from equipment, carry out link tracing to what record in maintenance point verification table, verify the table coupling if follow the trail of result and maintenance point, enable the CFD configuration on this device port, send the configuration end message to all from equipment, and enter Finish state (as shown in A4); Otherwise, remove completed configuration in this CFD protocol configuration process on this device port, send configuration and cancel message, and proceed to Inactive state (as shown in A5);
Enter Slave_Feedback state (as A6 as shown in) from the Inactive state from equipment after the CC message issued receiving assigned vlan;
From equipment under the Slave_Feedback state, for after each the CC message received, replying respectively the LT message, and opening timing device Timer2 (timing length can be made as 60 seconds) when receiving first CC message, and start to carry out CFD agreement self-configuring (as configuring maintenance intermediate point, maintaining end point etc.) after timer Timer2 is overtime;
Enable the CFD configuration on device port separately from equipment end message receiving configuration, and enter Finish state (as shown in A7);
, remove completed configuration in this CFD protocol configuration process on this device port, and enter Inactive state (as shown in A5) receiving configuration cancellation message from equipment.
Further, if in CFD agreement self-configuring process, main equipment or from equipment receive the configuration mandatum cassatorium (this configuration mandatum cassatorium can by Host be issued to main equipment or from equipment), from current state, proceed to Inactive state (as shown in A5).Main equipment can not proceed to Inactive state (as shown in A5) from current state by the LT message returned from equipment in the situation that timer Timer1 also receives when overtime yet; Perhaps, discovery tracking results and maintenance point verification table from equipment carries out link trace are not mated, from current state, proceed to Inactive state (as shown in A5).
In order to further describe the implementation procedure of the embodiment of the present invention, the group-network construction shown in Fig. 5 A of below take is described CFD agreement self-configuring process as example.As shown in Figure 5A, all of the port of DUT1～5 all belongs to VLAN 100, and when needs are configured to identical maintenance field rank by DUT1～5, its CFD self-configuring flow process comprises:
At first, issue respectively the order of CFD protocol configuration to DUT1～5 by Host (being CFD configuration client), by this order VLAN 100 and maintenance field class 5 under configuration CFD on DUT1～5, the maintenance field title, safeguard that set name claims can be selected by system (the mode by configuration order is configured on DUT1～5) with the Service Instance title in reserved several titles, perhaps by each equipment, automatically generate and (can define in advance the maintenance field title on each equipment, safeguard that set name claims the naming rule with the Service Instance title, as named according to the maintenance field grade, as the maintenance field title may be defined as MD_n, wherein n is maintenance field grade numerical value).DUT1～5 enter the Inactive state from current Finish state after receiving the order of CFD protocol configuration, and monitor the CC message on the port that is Up at 100 times all states of VLAN.
After this, enter automatic configuration phase:
Phase?1
The network manager, at DUT1, namely, on certain edge device of this maintenance field, issues the self-configuring initiation command.Now, DUT1 enters the Main_Trial state as main equipment, and opening timing device Timer1, all of the port of DUT1 under VLAN 100, and (as 1 second) sends the CC message that a maintenance field rank is 5 at set intervals.As shown in Figure 5 B.The timing length of timer Timer1 can be arranged according to the quantity of DUT in group-network construction, the more timing lengths of DUT quantity are longer, the concrete setting of timing length should be able to guarantee that within this period main equipment can obtain the bridge MAC Address of each equipment on the whole piece link and arrive the needed two layers of hop count of DUT1, as the timing length of Timer1 can be made as 60 seconds.
Phase?2
For each equipment in DUT2～DUT5, as from equipment when listening port is received the CC message for the first time, (timing length is no less than the duration of Timer1 to the opening timing device, can equate with the timing length of Timer1, as be made as 60 seconds, the timer that DUT2～DUT5 is corresponding is Timer2～5), enter the Slave_Feedback state from the Inactive state, and, at this CC message of the interior transparent transmission of VLAN 100, then to the source address of CC message, reply a LT message.Often receive a CC message later, just to source address, reply a LT message, as shown in Figure 5 C.Receive that the intermediate equipment of LT message can be replied a LTR message, as shown in Figure 5 D therebetween.
Phase?3
DUT1 continue to monitor the LT message in during timer Timer1 timing on VLAN 100.After timer Timer1 is overtime, DUT1 just can obtain the bridge MAC Address of each equipment on the whole piece link and arrive the needed two layers of hop count of DUT1, thereby generate maintenance point, verifies table.If DUT1 does not receive any LT message during timer Timer1 timing, to Host, return to the information of CFD self-configuring failure, and again revert to the Inactive state.
Phase?4
For each equipment in DUT2～DUT5, monitor the LT message in inherent VLAN 100 during corresponding timer (Timer2～5) timing, and return to the LTR message when listening to the LT message.After corresponding timer (Timer2～5) is overtime, relevant device is interior all ports of receiving the ports of LT message and replying the LTR message at first in the meantime, all automatically be configured to Maintenance Intermediate Point (MIP), and have on other other port of identical maintenance field level and configure MIP with this MIP on this equipment, then other is receiving the CC message from equipment, and does not reply configuration export-oriented maintaining end point (MEP) on the port of LTR message.For example, DUT3_Eth1/1, DUT3_Eth1/2 and DUT4_Eth1/1 received the LT message and replied the LTR message, therefore be configured as MIP, and DUT3_Eth1/0 and DUT4_Eth1/0 are configured to MIP; Owing to there not being the port of receiving the LT message and replying the LTR message on DUT5, received the CC message but do not reply the port DUT5_Eth1/0 of LTR message and only exist, DUT5_Eth1/0 is configured to MEP.
All export-oriented MEP are configured according to MD, the MA and the SI that automatically generate or automatically select, and stop the CC message is replied to the LT message.
Phase?5
On DUT1, start timer Timer10 from receiving first LT message and replying the LTR message, receive replacement timer Timer10 after the LT message at every turn, after the timing duration of timer Timer10 reaches setting duration (as 10 seconds), maintenance point is verified to all LT message source MAC Address (being the bridge MAC Address of equipment) of table and initiate link tracing, and link tracing result and maintenance point verification table are compared (comprised in the verification table from the bridge MAC of equipment and the jumping figure of this node arrival main equipment DUT1.After DUT1 initiates link tracing, can receive the LTR message that carries the residue ttl value, then search the source MAC of LTR message in the verification table, after finding, see that whether the ttl value in this LTR message was corresponding with this jumping figure that arrives main equipment DUT1 from equipment in the verification table), if consistent, to miscellaneous equipment, send and configured message, then self proceed to the Finish state.All miscellaneous equipments are received after CFD has configured message and are enabled CFD, start to set up neighbours with other MEP.If comparison result is inconsistent, send configuration and cancel message, restart configuration.The purpose of opening timer Timer10 is to guarantee that DUT1 sends the process of CC message during the timing of Temer1, can receive the LT message that all other DUT (being DUT2～DUT5) return here.As, DUT1 in the situation that in 60 seconds per second send a CC message, should be able to receive the LT message that DUT2～DUT5 returns after 70 seconds, thereby timing duration that can timer Timer10 is set to 10 seconds.
As shown in Fig. 5 E, DUT1_Eth1/0, DUT2_Eth1/0 and DUT5_Eth1/0 finally generate export-oriented MEP, continue mutually to send the CC message between the three and set up neighbours, and CFD protocol configuration so far all completes.The interruption of link, all can make a pair of neighbours report to the police arbitrarily, with the warning neighbours.
Further, in the self-configuring process, if be transported to up and down and put mandatum cassatorium at DUT1 by Host, main equipment DUT1 issues immediately one and is used to indicate the LT message of cancelling configuration.After the LT message that miscellaneous equipment is main equipment bridge MAC at the source MAC of receiving, directly finish the self-configuring process, and remove the relevant information of all and automatic configuration, the LTR message of a response of transmission after completing, each equipment state is got back to the inactive state.
Above flow process take that to select in the maintenance field edge device be that example is described as main equipment, and in this case, the port that main equipment sends the CC message can directly be used as export-oriented MEP.Can certainly select the equipment of other position as main equipment, in such cases, on main equipment, also need, according to the situation that receives the LT message and return to the LTR message, MIP (concrete set-up mode is the same) is set, as can reach at the timing duration of timer Timer10 set duration after, carry out the MIP configuration before link tracing.
Involved self-configuring end message in the embodiment of the present invention, can carry out by the CFD message to common certain modification and obtain, the end message when being used as self-configuring and completing.
As shown in Figure 6, existing CFD message format is as follows:
Destination MAC address (destination-mac address): multicast address (CCM, LTM) 0180-c200-0035;
Source MAC address (source MAC): the machine bridge MAC Address;
CFM EtherType (CFM ethernet type): 8902 (OAM frames);
MALevel (MA rank): consistent with the machine place maintenance field, scope is 0～7.
Source MAC address value in self-configuring end message in the embodiment of the present invention is 0000-0000-0000, and other field contents can be consistent with existing CC message.
By above description, can find out, the embodiment of the present invention has realized the self-configuring of CFD agreement to a certain extent, as long as every equipment is carried out to the layoutprocedure that 1 to 2 configuration just can complete a more complete maintenance field of ratio.In this self-configuring process, all concrete configurations are completed automatically by equipment substantially, and the attendant only needs the maintenance field rank of designated equipment, and issue the self-configuring initiation command, so just the order of the reasonable solution configuration distributing of energy is loaded down with trivial details, the problem of configuration error easily occurs.The maintenance function not impact of the CFD agreement self-configuring mode of the embodiment of the present invention on the CFD configuration, the equipment that possesses automatic configuration can join in the maintenance field of manual mode configuration.From whole network, the maintenance field automatically generated is complete and reasonable, and can freely to maintenance field, be divided as required.
Technical conceive based on identical, the embodiment of the present invention also provides a kind of communication equipment that can be applicable to above-mentioned flow process.
Referring to Fig. 7, the structural representation of the communication equipment provided for the embodiment of the present invention.As shown in the figure, this communication equipment can comprise:
The first configuration module 701, for receiving maintenance field rank configuration order, and according to the maintenance field rank of this this equipment of command configuration;
Message processing module (MPM) 702 in the situation that this equipment is positioned at the maintenance field border and is selected as main equipment, sends and has other CC message of described maintenance field level in described VLAN; In the situation that this equipment returns to the LT message, and returns to the LTR message to the transmit leg of this LT message from equipment as from equipment after the CC message that receives the main equipment transmission;
The second configuration module 703, for in the situation that this equipment as from equipment, received the LT message if exist and to reply the port of LTR message, configuring maintenance intermediate point thereon, and there is configuring maintenance intermediate point on other other port of identical maintenance field level with this Maintenance Intermediate Point; Otherwise, receiving the CC message and do not replying the export-oriented maintaining end point of configuration on the port of LTR message; In the situation that this equipment, as main equipment, configures export-oriented maintaining end point on the port that sends the CC message.
Above-mentioned communication equipment also can comprise:
Maintenance point list block 704, for in the situation that this equipment as main equipment, the LT message received according to message processing module (MPM) 702 generates the maintenance point list, records the MAC Address of the bridge from equipment of returning to the LT message in described maintenance point list and arrives these two layer hop counts required from equipment;
The 3rd configuration module 706, in the situation that this equipment, as main equipment, when the comparative result of link detecting module 705 is consistent, enables CFD on this device port configuration, end message is put in concurrent delivery; In the situation that this equipment as from equipment, enables the CFD configuration on device port separately after receiving the configuration end message.
Above-mentioned communication equipment also can comprise: module 707 is removed in configuration, for in the situation that this equipment as main equipment, if if the comparison of link detecting module 705 is inconsistent, remove completed configuration in this CFD protocol configuration process on this device port, the cancellation message is put in concurrent delivery; In the situation that this equipment is removed completed configuration in this CFD protocol configuration process on this device port as from equipment after receiving configuration cancellation message.
In above-mentioned communication equipment, configuration is removed module 707 and also be can be used for: in the situation that this equipment is as main equipment, the LT message returned from equipment if do not receive, remove completed configuration in this CFD protocol configuration process on this device port, and the cancellation message is put in concurrent delivery; In the situation that this equipment is removed completed configuration in this CFD protocol configuration process on this device port as from equipment after receiving configuration cancellation message; Perhaps, in the situation that this equipment, as main equipment or from equipment, if receive the configuration cancellation message that the configuration client sends, is removed completed configuration in this CFD protocol configuration process on this device port.
In above-mentioned communication equipment, message processing module (MPM) 702 can specifically for, in the situation that this equipment is as main equipment, in the first duration, the cycle sends other CC message of described maintenance field level; Link detecting module 705 can specifically for: according to described maintenance point list, each in this list carried out to link trace from equipment after the second duration; The second configuration module 703 can specifically for: in the situation that this equipment is as from equipment, receiving first CC start of heading while arriving the 3rd duration, if there is the port of receiving the LT message and replying the LTR message in this equipment, configuring maintenance intermediate point on this port, and there is configuring maintenance intermediate point on other other port of identical maintenance field level with this Maintenance Intermediate Point; Otherwise, receiving described CC message and do not replying the export-oriented maintaining end point of configuration on the port of LTR message.
In sum, the embodiment of the present invention is to all devices in a maintenance field, only need a small amount of configuration order just can complete pre-intelligent networking pre-configured, and then, through initiate intelligent adaptive networking detection of connectivity at a main equipment, finally complete building of whole network environment.And, the problem of the association attributes configuration error that the embodiment of the present invention has avoided manual configuration to cause to a certain extent, and can further by detection of connectivity, guarantee the validity of configuration.In addition, when change of network environment, only scheme need to be re-executed, just the current network environment can be automatically adapted to.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a station terminal equipment (can be mobile phone, personal computer, server, or the network equipment etc.) the described method of execution each embodiment of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
Claims (10)
1. one kind is communicated with error detection (Connectivity Fault Detection, CFD) protocol configuration method, it is characterized in that, be applied to as specifying the equipment configuration of setting quantity in virtual LAN VLAN to there is the process of identical other maintenance field of maintenance field level, the equipment of described setting quantity comprises an equipment that is positioned at the maintenance field border and is selected as main equipment, all the other are that the method comprises from equipment:
Main equipment and each receive respectively maintenance field rank configuration order from equipment, and according to the maintenance field rank of this this equipment of command configuration;
Main equipment sends in described VLAN has other continuity detection of described maintenance field level (Continuity Check Message, CC) message, each return link from equipment receives the CC message is followed the tracks of (Link Trace, LT) message, wherein, the intermediate equipment that receives the LT message is followed the tracks of and is replied (Link Trace Reply, LTR) message to the transmit leg equipment return link of this LT message;
Main equipment is the export-oriented maintaining end point of configuration on the port that sends the CC message, existence received the LT message and replied the LTR message port from equipment, receive the LT message and replied configuring maintenance intermediate point on the port of LTR message described, and there is identical maintenance field level other other port on configuring maintenance intermediate point with this Maintenance Intermediate Point described from equipment; Other from equipment at the export-oriented maintaining end point of port configuration of receiving the CC message and not replying the LTR message.
2. the method for claim 1, is characterized in that, also comprises:
Main equipment generates the maintenance point list according to the LT message received, and records the MAC Address of the bridge from equipment of returning to the LT message in described maintenance point list and arrives these two layer hop counts required from equipment;
Main equipment carries out link trace to each in this list from equipment according to described maintenance point list, and each bridge MAC Address from equipment in tracking results and described maintenance point list and these two layer hop counts required from equipment of arrival are compared, if consistent, enable the CFD configuration on this device port, end message is put in concurrent delivery;
Each enables the CFD configuration on device port separately from equipment receives the configuration end message.
3. method as claimed in claim 2, is characterized in that, also comprises:
When main equipment compares each bridge MAC Address from equipment in tracking results and described maintenance point list with these two layers of hop counts required from equipment of arrival, if inconsistent, remove completed configuration in this CFD protocol configuration process on this device port, the cancellation message is put in concurrent delivery;
Each,, from equipment receives configuration cancellation message, removes completed configuration in this CFD protocol configuration process on this device port.
4. the method for claim 1, is characterized in that, also comprises:
If main equipment does not receive the LT message returned from equipment, remove completed configuration in this CFD protocol configuration process on this device port, the cancellation message is put in concurrent delivery; From equipment receives configuration cancellation message, remove completed configuration in this CFD protocol configuration process on this device port; Perhaps
If main equipment and receive from equipment the configuration that the configuration client sends and cancel message, remove completed configuration in this CFD protocol configuration process on this device port.
5. method as described as one of claim 2-4, is characterized in that, main equipment cycle in the first duration sends other CC message of described maintenance field level, and according to described maintenance point list, each in this list carried out to link trace from equipment after the second duration;
While from equipment from receiving first CC start of heading, arriving the 3rd duration, if there is the port of receiving the LT message and replying the LTR message in this equipment, described, receive the LT message and replied configuring maintenance intermediate point on the port of LTR message, and there is identical maintenance field level other other port on configuring maintenance intermediate point with this Maintenance Intermediate Point described from equipment; Otherwise, receiving described CC message and do not replying the export-oriented maintaining end point of configuration on the port of LTR message;
Wherein, the second duration is greater than the first duration, and the 3rd duration is not less than the first duration.
6. a communication equipment, is characterized in that, is applied to as specifying the equipment configuration of setting quantity in virtual LAN VLAN to have the process of identical other maintenance field of maintenance field level, and this communication equipment comprises:
The first configuration module, for receiving maintenance field rank configuration order, and according to the maintenance field rank of this this equipment of command configuration;
Message processing module (MPM) in the situation that this equipment is positioned at the maintenance field border and is selected as main equipment, sends and has other continuity detection (Continuity Check Message, CC) message of described maintenance field level in described VLAN; In the situation that this equipment is as from equipment, after the CC message that receives the main equipment transmission, return link is followed the tracks of (Link Trace, LT) message, and the transmit leg to this LT message is followed the tracks of and is replied (Link Trace Reply from the equipment return link when receiving the LT message that other returns from equipment, LTR, LTR) message;
The second configuration module, for in the situation that this equipment as from equipment, if there is the port of receiving the LT message and replying the LTR message, described, receive the LT message and replied configuring maintenance intermediate point on the port of LTR message, and there is identical maintenance field level other other port on configuring maintenance intermediate point with this Maintenance Intermediate Point described from equipment; Otherwise, receiving the CC message and do not replying the export-oriented maintaining end point of configuration on the port of LTR message; In the situation that this equipment, as main equipment, configures export-oriented maintaining end point on the port that sends the CC message.
7. communication equipment as claimed in claim 6, is characterized in that, also comprises:
The maintenance point list block, for in the situation that this equipment as main equipment, the LT message received according to described message processing module (MPM) generates the maintenance point list, records the MAC Address of the bridge from equipment of returning to the LT message in described maintenance point list and arrives these two layer hop counts required from equipment;
The link detecting module, for in the situation that this equipment as main equipment, according to described maintenance point list, each in this list carried out to link trace from equipment, and each bridge MAC Address from equipment in tracking results and described maintenance point list and these two layer hop counts required from equipment of arrival are compared;
The 3rd configuration module, be used in the situation that this equipment, as main equipment, when the comparative result of described link detecting module is consistent, enables connection error detection (the Connectivity Fault Detection on this device port, CFD) configuration, end message is put in concurrent delivery; In the situation that this equipment as from equipment, enables the CFD configuration on device port separately after receiving the configuration end message.
8. communication equipment as claimed in claim 7, is characterized in that, also comprises:
Module is removed in configuration, and in the situation that this equipment, as main equipment, if if the comparison of described link detecting module is inconsistent, is removed completed configuration in this CFD protocol configuration process on this device port, the cancellation message is put in concurrent delivery; In the situation that this equipment is removed completed configuration in this CFD protocol configuration process on this device port as from equipment after receiving configuration cancellation message.
9. communication equipment as claimed in claim 6, is characterized in that, also comprises:
Module is removed in configuration, and in the situation that the LT message that this equipment, as main equipment, returns from equipment if do not receive is removed completed configuration in this CFD protocol configuration process on this device port, the cancellation message is put in concurrent delivery; In the situation that this equipment is removed completed configuration in this CFD protocol configuration process on this device port as from equipment after receiving configuration cancellation message; Perhaps, in the situation that this equipment, as main equipment or from equipment, if receive the configuration cancellation message that the configuration client sends, is removed completed configuration in this CFD protocol configuration process on this device port.
10. communication equipment as described as one of claim 6-9, is characterized in that, described message processing module (MPM) specifically for, in the situation that this equipment is as main equipment, in the first duration, the cycle sends other CC message of described maintenance field level;
Described link detecting module specifically for, according to described maintenance point list, each in this list carried out to link trace from equipment after the second duration;
The second configuration module specifically for, in the situation that this equipment is as from equipment, receiving first CC start of heading while arriving the 3rd duration, if there is the port of receiving the LT message and replying the LTR message in this equipment, described, receive the LT message and replied configuring maintenance intermediate point on the port of LTR message, and there is identical maintenance field level other other port on configuring maintenance intermediate point with this Maintenance Intermediate Point described from equipment; Otherwise, receiving described CC message and do not replying the export-oriented maintaining end point of configuration on the port of LTR message;
Wherein, the second duration is greater than the first duration, and the 3rd duration is not less than the first duration.
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| TWI535241B (en) | 2012-12-10 | 2016-05-21 | 智邦科技股份有限公司 | Network device and network device recognition method |
| CN103036793B (en) * | 2012-12-17 | 2015-09-16 | 杭州华三通信技术有限公司 | Be communicated with sending method and the forwarding unit of error detection protocol message |
| CN103152202B (en) * | 2013-03-13 | 2016-03-30 | 华为技术有限公司 | Parameter deployment, communication node and communication network |
| ES2617974T3 (en) * | 2013-06-17 | 2017-06-20 | Huawei Technologies Co., Ltd. | MEP configuration method and network device |
| CN103354549B (en) * | 2013-07-01 | 2016-05-04 | 杭州华三通信技术有限公司 | A kind of CFD implementation method and equipment based on dynamic vlan log-in protocol |
| CN104660469B (en) * | 2015-02-15 | 2018-11-16 | 华为技术有限公司 | A kind of method for detecting connectivity and relevant device of double layer network |
| CN113709049A (en) * | 2020-05-20 | 2021-11-26 | 中兴通讯股份有限公司 | Method for creating intermediate point of maintenance entity group, node and readable storage medium |
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