CN104579758A - LISP (Location/ID Separation Protocol) domain fault detection convergence method and equipment - Google Patents
LISP (Location/ID Separation Protocol) domain fault detection convergence method and equipment Download PDFInfo
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Abstract
The invention discloses an LISP (Location/ID Separation Protocol) domain fault detection convergence method and equipment. The method comprises the following steps: a first tunneling router starts a first timer T1 for a second tunneling router; the first tunneling router receives an LISP monitoring message from the second tunneling router; if the first tunneling router does not receive the LISP monitoring message from the second tunneling router before the first timer expires, the first tunneling router confirms that the second tunneling router is out of order; the first tunneling router confirms that the IP address of the second tunneling router is that of the first tunneling router and distributes a routing carrying the IP address of the second tunneling router to the outside. In the embodiment of the invention, the service interruption is avoided, and flow packet loss is avoided.
Description
Technical field
The present invention relates to communication technical field, especially relate to the method and apparatus of a kind of LISP territory fault detect convergence.
Background technology
As shown in Figure 1, for LISP (Location/ID Separation Protocol, position and identity separated protocol) the networking schematic diagram of network, network ip address can be divided into EID (Endpoint ID by this LISP network, end identifies) and RLOC (Routing Locator, route locating).Wherein, can introduce the mapping relations of EID-to-RLOC in LISP network, this EID, for identifying main frame, does not possess overall routing function, and this RLOC is used for the whole network route.In LISP network, IPv4 or IPv6 main frame only identifies its ID, its position is by ITR (Ingress Tunnel Router, tunnel portal router)/ETR (Egress Tunnel Router, tunnel outlet router) identify, ITR with ETR is relative, determines ITR and ETR according to message direction.Such as, when main frame 1 sends message to main frame 2, in LISP territory, main frame 1 place is ITR, and in LISP territory, main frame 2 place is ETR; When main frame 2 sends message to main frame 1, in LISP territory, main frame 2 place is ITR, and in LISP territory, main frame 1 place is ETR.LISP network comprises datum plane and control plane, and datum plane is mainly used in encapsulation/decapsulation and the forwarding of message, and control plane mainly completes the mapping of EID and RLOC.
In FIG, for the message transmission procedure between main frame S and main frame D, the EID-to-RLOC mapping relations of the upper maintenance of ITR1/ITR2 are: the corresponding relation between the IP address of main frame D and the IP address of ETR1, the corresponding relation between the IP address of main frame D and the IP address of ETR2.Main frame S sends to ITR1 (or ITR2) by sending to the message of main frame D, the source address of this message is the EID (i.e. the IP address of main frame S) of main frame S, and the destination address of this message is the EID of main frame D (i.e. the IP address of main frame D).After ITR1 receives message, utilize the IP address lookup EID-to-RLOC mapping relations of main frame D, obtain the IP address (or IP address of ETR2) of ETR1.ITR1 encapsulates message, and in the outer heading of encapsulation, RLOC address, source is the IP address of ITR1, and object RLOC address is the IP address of ETR1.Then, the message after this encapsulation is sent on ETR1 by Internet.The message that ETR1 decapsulation receives, and based on the destination address (EID of main frame D) of the message after decapsulation, message is sent to main frame D, thus realize message transmissions.
But, when ETR1 breaks down, the corresponding relation will comprised between the IP address of main frame D and the IP address of ETR1 in EID-to-RLOC mapping relations due to maintenance on ITR1, therefore, send to the message of main frame D for main frame S, this message may be sent to ETR1 by ITR1, and broken down due to now ETR1, therefore cause ETR1 message cannot be sent to main frame D, business is interrupted, and flow packet drop can occur.Further, the time of service disconnection will be continued until that ITR1 knows that ETR1 breaks down, and this time is longer, and namely service outage duration is longer, thus can lose a large amount of flows.
Summary of the invention
A kind of method that the embodiment of the present invention provides position and identity separated protocol LISP territory fault detect to restrain, comprise the first tunnel router and the second tunnel router in LISP territory, described method comprises:
Described first tunnel router is that the second tunnel router starts first timer T1; Described first tunnel router receives the second tunnel router periodically to the LISP monitoring message that this first tunnel router sends; Wherein, the time-out time of described first timer T1 is greater than the transmission interval that LISP monitors message;
If the LISP that the first tunnel router did not receive from the second tunnel router before described first timer T1 time-out monitors message, described first tunnel router confirms that the second tunnel router breaks down;
Described first tunnel router determines that the IP address of described second tunnel router is the IP address of this first tunnel router, and outwards issues the route of carrying the IP address of described second tunnel router.
After described first tunnel router confirms that described second tunnel router breaks down, described method comprises further: described first tunnel router sends fault notification message to mapping server, carries the information that described second tunnel router breaks down in described fault notification message; To make described mapping server after receiving described fault notification message, for described second tunnel router starts second timer T2, if do not receive the message from described second tunnel router before described second timer T2 time-out, then confirm that described second tunnel router breaks down, and be fault by record identification corresponding for described second tunnel router in end mark EID, the route locating RLOC mapping table of local maintenance.
After described first tunnel router confirms that described second tunnel router breaks down, described method comprises further: described first tunnel router is that described second tunnel router starts the 3rd timer T3; Wherein, the time-out time of described 3rd timer T3 is greater than the time-out time of described second timer T2;
If the LISP that the first tunnel router received from the second tunnel router before described 3rd timer T3 time-out monitors message, described first tunnel router confirms the second tunnel router fault recovery, and determine that the IP address of described second tunnel router is not the IP address of this first tunnel router, and cancel the route of carrying the IP address of described second tunnel router outwards issued; Described first tunnel router sends fault recovery message to mapping server, carries the information of described second tunnel router fault recovery in described fault recovery message; To make described mapping server after receiving fault recovery message, remove the failure identification that described in EID, RLOC mapping table, the second tunnel router is corresponding;
If the LISP that the first tunnel router did not receive from the second tunnel router before described 3rd timer T3 time-out monitors message, described first tunnel router confirms that the second tunnel router fault cannot be recovered, and determine that the IP address of the second tunnel router is not the IP address of this first tunnel router, and cancel the route of carrying the IP address of described second tunnel router outwards issued; Described first tunnel router sends fault to mapping server cannot recover message, and described fault cannot recover to carry in message the information that the second tunnel router fault cannot be recovered; To make described mapping server after receiving fault and message cannot be recovered, from EID, RLOC mapping table, delete the record that the second tunnel router is corresponding.
A kind of method that the embodiment of the present invention provides position and identity separated protocol LISP territory fault detect to restrain, comprise the first tunnel router and the second tunnel router in LISP territory, described method comprises:
Mapping server receives the fault notification message from described first tunnel router, carries the information that described second tunnel router breaks down in described fault notification message; Wherein, described fault notification message is that described first tunnel router utilizes described second tunnel router of first timer T1 confirmation to break down, and determine that the IP address of described second tunnel router is the IP address of described first tunnel router, and outwards to issue carry the route of the IP address of described second tunnel router after send;
Described mapping server is that described second tunnel router starts second timer T2; If do not receive the message from described second tunnel router before described second timer T2 time-out, then described mapping server confirms that described second tunnel router breaks down, and be fault by record identification corresponding for described second tunnel router in end mark EID, the route locating RLOC mapping table of local maintenance;
Described mapping server is sending described EID to the tunnel router in other LISP territory, during record in RLOC mapping table, record corresponding for described first tunnel router not being designated fault in described EID, RLOC mapping table is sent to the tunnel router in other LISP territory described.
Described method comprises further:
Described mapping server receives the fault recovery message from described first tunnel router, carries the information of described second tunnel router fault recovery in described fault recovery message; Wherein, described fault recovery message is that described first tunnel router utilizes the 3rd timer T3 to confirm described second tunnel router fault recovery, and determine that the IP address of described second tunnel router is not the IP address of described first tunnel router, and cancel outwards to issue carry the route of the IP address of described second tunnel router after send; Described mapping server, after receiving described fault recovery message, removes the failure identification that described in described EID, RLOC mapping table, the second tunnel router is corresponding; Or,
Described mapping server receives cannot recover message from the fault of described first tunnel router, and described fault cannot recover to carry in message the information that described second tunnel router fault cannot be recovered; Wherein, it is that described first tunnel router utilizes the described second tunnel router fault of the 3rd timer T3 confirmation to recover that described fault cannot recover message, and determine that the IP address of described second tunnel router is not the IP address of described first tunnel router, and cancel outwards to issue carry the route of the IP address of described second tunnel router after send; Described mapping server, after receiving described fault and cannot recovering message, deletes record corresponding to the second tunnel router from described EID, RLOC mapping table.
The embodiment of the present invention provides a kind of network equipment, the first tunnel router and the second tunnel router is comprised in position and identity separated protocol LISP territory, the described network equipment is as described first tunnel router in described LISP territory, and described first tunnel router specifically comprises:
Starting module, for starting first timer T1 for described second tunnel router, and receiving described second tunnel router periodically to the LISP monitoring message that described first tunnel router sends; Wherein, the time-out time of described first timer T1 is greater than the transmission interval that LISP monitors message;
Determination module, during for not receiving the LISP monitoring message from the second tunnel router before described first timer T1 time-out when the first tunnel router, confirms that the second tunnel router breaks down;
Sending module, for determining that the IP address of described second tunnel router is the IP address of described first tunnel router, and outwards issues the route of carrying the IP address of described second tunnel router.
Described sending module, is further used for, after described determination module confirms that described second tunnel router breaks down, sending fault notification message, carry the information that described second tunnel router breaks down in described fault notification message to mapping server; To make described mapping server after receiving described fault notification message, for described second tunnel router starts second timer T2, if do not receive the message from described second tunnel router before described second timer T2 time-out, then confirm that described second tunnel router breaks down, and be fault by record identification corresponding for described second tunnel router in end mark EID, the route locating RLOC mapping table of mapping server local maintenance.
Described startup module, also for after confirming that described second tunnel router breaks down at described determination module, is that described second tunnel router starts the 3rd timer T3; Wherein, the time-out time of described 3rd timer T3 is greater than the time-out time of described second timer T2;
Described determination module, time also for receiving the LISP monitoring message from the second tunnel router before described 3rd timer T3 time-out when the first tunnel router, confirms the second tunnel router fault recovery; Described sending module, also for determining that the IP address of described second tunnel router is not the IP address of described first tunnel router, and cancels the route of carrying the IP address of described second tunnel router outwards issued; Send fault recovery message to mapping server, in described fault recovery message, carry the information of described second tunnel router fault recovery; To make described mapping server after receiving fault recovery message, remove the failure identification that described in EID, RLOC mapping table, the second tunnel router is corresponding;
Described determination module, time also for not receiving the LISP monitoring message from the second tunnel router before described 3rd timer T3 time-out when the first tunnel router, confirms that the second tunnel router fault cannot be recovered; Described sending module, also for determining that the IP address of the second tunnel router is not the IP address of described first tunnel router, and cancels the route of carrying the IP address of described second tunnel router outwards issued; Send fault to mapping server and cannot recover message, described fault cannot recover to carry in message the information that the second tunnel router fault cannot be recovered; To make mapping server after receiving fault and message cannot be recovered, from EID, RLOC mapping table, delete the record that the second tunnel router is corresponding.
The embodiment of the present invention provides a kind of mapping server, and comprise the first tunnel router and the second tunnel router in position and identity separated protocol LISP territory, described mapping services implement body comprises:
Receiver module, for receiving the fault notification message from described first tunnel router, carries the information that described second tunnel router breaks down in described fault notification message; Wherein, described fault notification message is that described first tunnel router utilizes described second tunnel router of first timer T1 confirmation to break down, and determine that the IP address of described second tunnel router is the IP address of described first tunnel router, and outwards to issue carry the route of the IP address of described second tunnel router after send;
Processing module, for starting second timer T2 for described second tunnel router; If do not receive the message from described second tunnel router before described second timer T2 time-out, then confirm that described second tunnel router breaks down, and be fault by record identification corresponding for described second tunnel router in end mark EID, the route locating RLOC mapping table of described mapping server local maintenance;
Sending module, for sending described EID to the tunnel router in other LISP territory, during record in RLOC mapping table, record corresponding for described first tunnel router not being designated fault is sent to the tunnel router in other LISP territory described in described EID, RLOC mapping table.
Described receiver module, also for receiving the fault recovery message from described first tunnel router, carries the information of described second tunnel router fault recovery in described fault recovery message; Wherein, described fault recovery message is that described first tunnel router utilizes the 3rd timer T3 to confirm described second tunnel router fault recovery, and determine that the IP address of described second tunnel router is not the IP address of described first tunnel router, and cancel outwards to issue carry the route of the IP address of described second tunnel router after send; Described processing module, also for after receiving described fault recovery message, removes the failure identification that described in described EID, RLOC mapping table, the second tunnel router is corresponding; Or,
Described receiver module, also cannot recover message for the fault received from described first tunnel router, and described fault cannot recover to carry in message the information that the second tunnel router fault cannot be recovered; Wherein, it is that described first tunnel router utilizes the described second tunnel router fault of the 3rd timer T3 confirmation to recover that described fault cannot recover message, and determine that the IP address of the second tunnel router is not the IP address of described first tunnel router, and cancel outwards to issue carry the route of the IP address of described second tunnel router after send; Described processing module, also for after receiving described fault and cannot recovering message, deletes record corresponding to the second tunnel router from described EID, RLOC mapping table.
Based on technique scheme, in the embodiment of the present invention, when the second tunnel router in LISP territory breaks down, the first tunnel router in this LISP territory can break down by perception in time second tunnel router, namely fast detecting is to the tunnel router of fault, and the IP address of adapter second tunnel router, the route of the IP address of the second tunnel router is carried in outside issue, thus the message making the tunnel router in other LISP territory send all sends to the first tunnel router, message is avoided to send to the second tunnel router, thus avoid business to interrupt, and avoid flow packet drop occurs.Further, the tunnel router not perception fault in other LISP territory occurs, and reduces packet loss and list item switching.
Accompanying drawing explanation
Fig. 1 is the networking schematic diagram of LISP network;
Fig. 2 is the method flow diagram of a kind of LISP territory fault detect convergence proposed in the embodiment of the present invention;
Fig. 3 is the form schematic diagram that the LISP proposed in the embodiment of the present invention monitors message;
Fig. 4 is the form schematic diagram of the fault notification message proposed in the embodiment of the present invention;
Fig. 5 is the structural representation of a kind of network equipment proposed in the embodiment of the present invention;
Fig. 6 is the structural representation of a kind of mapping server proposed in the embodiment of the present invention.
Embodiment
For problems of the prior art, the embodiment of the present invention proposes the method for a kind of LISP territory fault detect convergence, be applied in the LISP network comprising multiple LISP territory, comprise at least two tunnel routers in LISP territory, two tunnel routers are respectively the first tunnel router and the second tunnel router.Take Fig. 1 as the application scenarios schematic diagram of the embodiment of the present invention, this LISP network comprises in LISP territory 1 and territory, LISP territory 2, LISP 1 and comprises two tunnel routers, comprises two tunnel routers in LISP territory 2.When main frame S in LISP territory 1 sends message to the main frame D in LISP territory 2, two tunnel routers in LISP territory 1 are ITR (i.e. ITR1 and ITR2), and two tunnel routers in LISP territory 2 are ETR (i.e. ETR1 and ETR2); When main frame D in LISP territory 2 sends message to the main frame S in LISP territory 1, two tunnel routers in LISP territory 1 are ETR (i.e. ETR1 and ETR2), and two tunnel routers in LISP territory 2 are ITR (i.e. ITR1 and ITR2).For convenience of describing, in the embodiment of the present invention, when sending message with the main frame S in LISP territory 1 to the main frame D in LISP territory 2, the process of two tunnel routers (the first tunnel router and the second tunnel router) in LISP territory 2 is example, now, two tunnel routers in LISP territory 2 are ETR, are respectively ETR1 and ETR2, namely the first tunnel router is the ETR1 in LISP territory 2, and the second tunnel router is the ETR2 in LISP territory 2.
In the embodiment of the present invention, in this LISP network, also comprise MS (Map Server, mapping server), this mapping server for safeguarding EID, RLOC mapping table, and the record in EID, RLOC mapping table is informed corresponding tunnel router.Such as, the EID that mapping server is safeguarded, RLOC mapping table comprises: the corresponding relation between the IP address of the corresponding relation between the IP address of main frame D and the IP address of ETR1, corresponding relation between the IP address of main frame D and the IP address of ETR2, main frame S and the IP address of ITR1, corresponding relation between the IP address of main frame S and the IP address of ITR2.Based on this, based on the request of ITR1 or ITR2, corresponding relation between the IP address of the corresponding relation between the IP address of main frame D and the IP address of ETR1, main frame D and the IP address of ETR2 can be informed to ITR1 or ITR2 by mapping server, is: the corresponding relation between the IP address of main frame D and the IP address of ETR1, corresponding relation between the IP address of main frame D and the IP address of ETR2 to make the EID-to-RLOC mapping relations that ITR1 or ITR2 safeguards.Based on the request of ETR1 or ETR2, corresponding relation between the IP address of the corresponding relation between the IP address of main frame S and the IP address of ITR1, main frame S and the IP address of ITR2 can be informed to ETR1 or ETR2 by mapping server, to make the EID-to-RLOC mapping relations safeguarded on ETR1 or ETR2 is: the corresponding relation between the IP address of main frame S and the IP address of ITR1, corresponding relation between the IP address of main frame S and the IP address of ITR2.
As shown in Figure 2, the method for this LISP territory fault detect convergence specifically comprises the following steps:
Step 201, first tunnel router is that the second tunnel router starts first timer T1, and periodically send LISP monitoring message to the second tunnel router, and receive the second tunnel router periodically to the LISP monitoring message that the first tunnel router sends.Second tunnel router is the first tunnel router startup first timer T1, and periodically sends LISP monitoring message to the first tunnel router, and receives the first tunnel router periodically to the LISP monitoring message that the second tunnel router sends.
In the embodiment of the present invention, the time-out time of first timer T1 is greater than the transmission interval that LISP monitors message.Such as, the time-out time of first timer T1 is more than or equal to the transmission interval that 3 LISP monitor message.Wherein, the transmission interval that LISP monitors message can be arranged according to actual needs, as being set to 1 second, the first tunnel router sent LISP every 1 second to the second tunnel router and monitors message, and the second tunnel router sent LISP every 1 second to the first tunnel router and monitors message.Transmission interval based on LISP monitoring message arranges the time-out time of first timer T1, makes the time-out time of first timer T1 be greater than the transmission interval of LISP monitoring message, as the time-out time of first timer T1 is set to 3 seconds.
In a kind of specific implementation, the negotiation at transmission interval that LISP monitors message can also be carried out, send LISP to make the first tunnel router to the second tunnel router and monitor the transmission interval of message and the second tunnel router and send LISP to the first tunnel router to monitor the transmission interval of message consistent.Such as, the transmission that first tunnel router sends LISP monitoring message to the second tunnel router is spaced apart 100 milliseconds, second tunnel router to the first tunnel router send LISP monitor the transmission of message be spaced apart 200 milliseconds time, then: the first tunnel router is when first time receives the LISP monitoring message from the second tunnel router, from LISP monitoring message, get transmission be spaced apart 200 milliseconds, and the transmission interval that the first tunnel router sends LISP monitoring message to the second tunnel router is revised as 200 milliseconds by 100 milliseconds; Or, second tunnel router is when first time receives the LISP monitoring message from the first tunnel router, from LISP monitoring message, get transmission be spaced apart 100 milliseconds, and the transmission interval that the second tunnel router sends LISP monitoring message to the first tunnel router is revised as 100 milliseconds by 200 milliseconds.
As shown in Figure 3, for LISP monitors the form schematic diagram of message, it is a kind of UDP (User Datagram Protocol, User Datagram Protoco (UDP)) message that LISP monitors message, and this LISP monitors message and comprises IP head, UDP head, LISP message field (MFLD).The LISP sent to the second tunnel router for the first tunnel router monitors message, then: IP head part, object IP address is the IP address (the IP address as ETR2) of the second tunnel router, and source IP address is the IP address (the IP address as ETR1) of the first tunnel router.UDP head part, Dest Port (destination interface) is that fixing 4342, Source Port (source port) can specify arbitrarily.LISP message field (MFLD) comprises 64, and first 4 is Type values (types value) field, and value is 9, for representing that current message is that LISP monitors message; 12 is Interval time (interval time) field afterwards, is used for consulting the transmission interval that LISP monitors message; 16 is reserved field afterwards; Last 32 is the IP address (the IP address as ETR1) of the first tunnel router.
For convenience of description, be described for the process of the first tunnel router (ETR1), the process of the second tunnel router (ETR2) and the process of the first tunnel router similar, follow-uply to repeat no more.
Step 202, if the LISP that the first tunnel router did not receive from the second tunnel router before first timer T1 time-out monitors message, then confirmation second tunnel router breaks down by the first tunnel router.Further, if the LISP that the first tunnel router received from the second tunnel router before first timer T1 time-out monitors message, then confirmation second tunnel router does not break down by the first tunnel router, and upgrading the value of first timer T1, the value by first timer T1 resets.
Step 203, when the second tunnel router breaks down, first tunnel router determines that the IP address of the second tunnel router is the IP address (i.e. the IP address of the first tunnel router adapter second tunnel router) of this first tunnel router, and outwards issues the route of carrying the IP address of the second tunnel router.
In the embodiment of the present invention, due to the IP address of the first tunnel router adapter second tunnel router, and outwards issue the route of carrying the IP address of the second tunnel router, therefore, when other tunnel router utilizes the IP address of the first tunnel router or the IP address of the second tunnel router sends message, this message is all sent on the first tunnel router, and can not be sent on the second tunnel router.
Such as, when main frame S sends message to main frame D, message is sent to ITR1 (or ITR2) by main frame S, the source address of this message is the EID (i.e. the IP address of main frame S) of main frame S, and the destination address of this message is the EID of main frame D (i.e. the IP address of main frame D).After ITR1 receives message, utilize the IP address lookup EID-to-RLOC mapping relations of main frame D, obtain the IP address of ETR1 or the IP address of ETR2.ITR1 encapsulates message, and in the outer heading of encapsulation, RLOC address, source is the IP address of ITR1, and object RLOC address is the IP address of ETR1 or the IP address of ETR2.When ETR2 breaks down, the route of the route of the IP address of ETR1 and the IP address of ETR2 is issued by ETR1, therefore, no matter the object RLOC address of message is the IP address of ETR1 or the IP address of ETR2, message all can be sent on ETR1 by Internet, and can not be sent on the ETR2 that broken down.Further, the message that ETR1 decapsulation receives, and based on the destination address (EID of main frame D) of the message after decapsulation, message is sent to main frame D, thus realize message transmissions.
In the embodiment of the present invention, the first tunnel router is after confirmation second tunnel router breaks down, and the first tunnel router sends fault notification message to mapping server, carries the information that the second tunnel router breaks down in this fault notification message.Mapping server, after receiving fault notification message, is that the second tunnel router starts second timer T2.If received the message from the second tunnel router before second timer T2 time-out, then mapping server confirms that the second tunnel router does not break down.If do not receive the message from the second tunnel router before second timer T2 time-out, then mapping server confirms that the second tunnel router breaks down, and at the EID of local maintenance, be fault by record identification corresponding for the second tunnel router in RLOC mapping table.Further, mapping server in other LISP territory tunnel router send EID, during record in RLOC mapping table, need EID, be not designated record corresponding to the first tunnel router of fault in RLOC mapping table and send to tunnel router in other LISP territory, and do not need EID, be designated record corresponding to the second tunnel router of fault in RLOC mapping table and send to tunnel router in other LISP territory.
Such as, ETR1 sends fault notification message to mapping server, carries the information that ETR2 breaks down in this fault notification message after confirming that ETR2 breaks down.Mapping server, after receiving fault notification message, is ETR2 startup second timer T2 (time-out time of second timer T2 can be arranged arbitrarily according to practical experience, is defaulted as 1 minute).If received any LISP message from ETR2 before second timer T2 time-out, then mapping server confirms that ETR2 true fault does not occur.If do not receive any LISP message from ETR2 before second timer T2 time-out, then mapping server confirms that true fault occurs ETR2, and in EID, RLOC mapping table, record (corresponding relation between the IP address of main frame D and the IP address of ETR2) corresponding for ETR2 is designated fault.
Further, when the tunnel router in other LISP territory is (as the tunnel router in LISP territory 1, tunnel router in LISP territory 3) to mapping server request EID, during record in RLOC mapping table, mapping server can send EID to the tunnel router in other LISP territory, record in RLOC mapping table, by EID, be not designated record corresponding to the ETR1 of fault (corresponding relation between the IP address of main frame D and the IP address of ETR1) in RLOC mapping table and send to tunnel router in other LISP territory, and not by EID, be designated record corresponding to the ETR2 of fault (corresponding relation between the IP address of main frame D and the IP address of ETR2) in RLOC mapping table and send to tunnel router in other LISP territory.Namely, now, as the EID that the tunnel router in other LISP territory is corresponding to the IP address of mapping server requesting host D, during RLOC mapping relations, the corresponding relation of the IP address of main frame D and the IP address of ETR1 is sent to the tunnel router in other LISP territory by mapping server, and the corresponding relation of the IP address of main frame D and the IP address of ETR2 is not sent to the tunnel router in other LISP territory.
As shown in Figure 4, be the form schematic diagram of fault notification message (fault-notify message), this fault notification message is a kind of UDP message, and this fault notification message comprises IP head, UDP head, LISP message field (MFLD).Wherein, IP head part, object IP address is the IP address of mapping server, and source IP address is the IP address (the IP address as ETR1) of the first tunnel router.UDP head part, Dest Port is that 4342, Source fixing Port can specify arbitrarily.LISP message field (MFLD) comprises 64, and first 4 is Type values field, and value is 10, for representing that current message is fault notification message; 28 is reserved field afterwards; Last 32 is Fault Routing Locator (fault route location) field, be used for identify fault tunnel router (i.e. the second tunnel router) IP address (the IP address as ETR2).
In the embodiment of the present invention, the first tunnel router is after confirmation second tunnel router breaks down, and the first tunnel router can also be that the second tunnel router starts the 3rd timer T3.Wherein, the time-out time of the 3rd timer T3 is greater than the time-out time of second timer T2.In specific implementation, the time-out time of the 3rd timer T3 is more than or equal to 2 times of times of EID-to-RLOC mapping table ageing time.
If the LISP that the first tunnel router received from the second tunnel router before the 3rd timer T3 time-out monitors message, then the first tunnel router confirms the second tunnel router fault recovery, and determine that the IP address of the second tunnel router is not the IP address of this first tunnel router, and cancel the route of carrying the IP address of the second tunnel router outwards issued.Further, the first tunnel router sends fault recovery message to mapping server, carries the information of the second tunnel router fault recovery in this fault recovery message.Mapping server, after receiving fault recovery message, removes the failure identification that in EID, RLOC mapping table, the second tunnel router is corresponding.Based on this, mapping server in other LISP territory tunnel router send EID, during record in RLOC mapping table, need record corresponding for the first tunnel router not being designated fault in EID, RLOC mapping table, be not designated record corresponding to the second tunnel router of fault and send to tunnel router in other LISP territory.
If the LISP that the first tunnel router did not receive from the second tunnel router before the 3rd timer T3 time-out monitors message, then the first tunnel router confirms that the second tunnel router fault cannot be recovered, and determine that the IP address of the second tunnel router is not the IP address of this first tunnel router, and cancel the route of carrying the IP address of the second tunnel router outwards issued.Further, the first tunnel router sends fault to mapping server cannot recover message, and this fault cannot recover to carry in message the information that the second tunnel router fault cannot be recovered.Mapping server, after receiving fault and cannot recovering message, deletes the record that the second tunnel router is corresponding from EID, RLOC mapping table.Based on this, mapping server in other LISP territory tunnel router send EID, during record in RLOC mapping table, due to EID, only there is record corresponding to the first tunnel router in RLOC mapping table, and there is not record corresponding to the second tunnel router, therefore, record corresponding for the first tunnel router in EID, RLOC mapping table is directly sent to the tunnel router in other LISP territory by mapping server.
In the embodiment of the present invention, mapping server is at EID, after record identification corresponding for the second tunnel router being fault in RLOC mapping table, and at mapping server from EID, before deleting record corresponding to the second tunnel router in RLOC mapping table, if mapping server receives any message from the second tunnel router, then mapping server all confirms this second tunnel router fault recovery, and need to remove the failure identification that in EID, RLOC mapping table, the second tunnel router is corresponding.
In the embodiment of the present invention, determine that the IP address of the second tunnel router is not the IP address of this first tunnel router at the first tunnel router, and outwards issue before cancelling carry the route of IP address of the second tunnel router after, the first tunnel router also needs deletion the 3rd timer T3.
Based on technique scheme, in the embodiment of the present invention, when the second tunnel router in LISP territory breaks down, the first tunnel router in this LISP territory can break down by perception in time second tunnel router, namely fast detecting is to the tunnel router of fault, and the IP address of adapter second tunnel router, the route of the IP address of the second tunnel router is carried in outside issue, thus the message making the tunnel router in other LISP territory send all sends to the first tunnel router, message is avoided to send to the second tunnel router, thus avoid business to interrupt, and avoid flow packet drop occurs.Further, the tunnel router not perception fault in other LISP territory occurs, and reduces packet loss and list item switching.
Based on the inventive concept same with said method, a kind of network equipment is additionally provided in the embodiment of the present invention, the first tunnel router and the second tunnel router is comprised in LISP territory, the described network equipment is as described first tunnel router in LISP territory, as shown in Figure 5, described first tunnel router specifically comprises:
Starting module 11, for starting first timer T1 for described second tunnel router, and receiving described second tunnel router periodically to the LISP monitoring message that described first tunnel router sends; Wherein, the time-out time of described first timer T1 is greater than the transmission interval that LISP monitors message;
Determination module 12, during for not receiving the LISP monitoring message from the second tunnel router before described first timer T1 time-out when the first tunnel router, confirms that the second tunnel router breaks down;
Sending module 13, for determining that the IP address of described second tunnel router is the IP address of described first tunnel router, and outwards issues the route of carrying the IP address of described second tunnel router.
Described sending module 13, be further used for after described determination module 12 confirms that described second tunnel router breaks down, send fault notification message to mapping server, in described fault notification message, carry the information that described second tunnel router breaks down; To make described mapping server after receiving described fault notification message, for described second tunnel router starts second timer T2, if do not receive the message from described second tunnel router before described second timer T2 time-out, then confirm that described second tunnel router breaks down, and be fault by record identification corresponding for described second tunnel router in end mark EID, the route locating RLOC mapping table of mapping server local maintenance.
Described startup module 11, also for after confirming that described second tunnel router breaks down at described determination module 12, is that described second tunnel router starts the 3rd timer T3; Wherein, the time-out time of described 3rd timer T3 is greater than the time-out time of described second timer T2;
Described determination module 12, time also for receiving the LISP monitoring message from the second tunnel router before described 3rd timer T3 time-out when the first tunnel router, confirms the second tunnel router fault recovery; Described sending module 13, also for determining that the IP address of the second tunnel router is not the IP address of described first tunnel router, and cancels the route of carrying the IP address of described second tunnel router outwards issued; Send fault recovery message to mapping server, in described fault recovery message, carry the information of described second tunnel router fault recovery; To make described mapping server after receiving fault recovery message, remove the failure identification that described in EID, RLOC mapping table, the second tunnel router is corresponding;
Described determination module 12, time also for not receiving the LISP monitoring message from the second tunnel router before described 3rd timer T3 time-out when the first tunnel router, confirms that the second tunnel router fault cannot be recovered; Described sending module 13, also for determining that the IP address of the second tunnel router is not the IP address of described first tunnel router, and cancels the route of carrying the IP address of the second tunnel router outwards issued; Send fault to mapping server and cannot recover message, described fault cannot recover to carry in message the information that the second tunnel router fault cannot be recovered; To make mapping server after receiving fault and message cannot be recovered, from EID, RLOC mapping table, delete the record that the second tunnel router is corresponding.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can be separated deployment.Above-mentioned module can merge into a module, also can split into multiple submodule further.
Based on the inventive concept same with said method, a kind of mapping server is additionally provided in the embodiment of the present invention, comprise the first tunnel router and the second tunnel router in position and identity separated protocol LISP territory, as shown in Figure 6, described mapping services implement body comprises:
Receiver module 21, for receiving the fault notification message from described first tunnel router, carries the information that described second tunnel router breaks down in described fault notification message; Wherein, described fault notification message is that described first tunnel router utilizes described second tunnel router of first timer T1 confirmation to break down, and determine that the IP address of described second tunnel router is the IP address of described first tunnel router, and outwards to issue carry the route of the IP address of described second tunnel router after send;
Processing module 22, for starting second timer T2 for the second tunnel router; If do not receive the message from described second tunnel router before described second timer T2 time-out, then confirm that described second tunnel router breaks down, and be fault by record identification corresponding for described second tunnel router in end mark EID, the route locating RLOC mapping table of described mapping server local maintenance;
Sending module 23, for sending described EID to the tunnel router in other LISP territory, during record in RLOC mapping table, record corresponding for the first tunnel router not being designated fault is sent to the tunnel router in other LISP territory described in described EID, RLOC mapping table.
Described receiver module 21, also for receiving the fault recovery message from described first tunnel router, carries the information of described second tunnel router fault recovery in described fault recovery message; Wherein, described fault recovery message is that described first tunnel router utilizes the 3rd timer T3 to confirm described second tunnel router fault recovery, and determine that the IP address of described second tunnel router is not the IP address of described first tunnel router, and cancel outwards to issue carry the route of the IP address of described second tunnel router after send; Described processing module 22, also for after receiving described fault recovery message, removes the failure identification that in described EID, RLOC mapping table, the second tunnel router is corresponding; Or,
Described receiver module 21, also cannot recover message for the fault received from the first tunnel router, and described fault cannot recover to carry in message the information that the second tunnel router fault cannot be recovered; Wherein, it is that described first tunnel router utilizes the described second tunnel router fault of the 3rd timer T3 confirmation to recover that described fault cannot recover message, and determine that the IP address of the second tunnel router is not the IP address of described first tunnel router, and cancel outwards to issue carry the route of the IP address of described second tunnel router after send; Described processing module 22, also for after receiving described fault and cannot recovering message, deletes record corresponding to the second tunnel router from described EID, RLOC mapping table.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can be separated deployment.Above-mentioned module can merge into a module, also can split into multiple submodule further.
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 required general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform method described in each embodiment of the present invention.It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (10)
1. the method that restrains of position and identity separated protocol LISP territory fault detect, it is characterized in that, comprise the first tunnel router and the second tunnel router in described LISP territory, described method comprises:
Described first tunnel router is that the second tunnel router starts first timer T1; Described first tunnel router receives the second tunnel router periodically to the LISP monitoring message that this first tunnel router sends; Wherein, the time-out time of described first timer T1 is greater than the transmission interval that LISP monitors message;
If the LISP that the first tunnel router did not receive from the second tunnel router before described first timer T1 time-out monitors message, described first tunnel router confirms that the second tunnel router breaks down;
Described first tunnel router determines that the IP address of described second tunnel router is the IP address of this first tunnel router, and outwards issues the route of carrying the IP address of described second tunnel router.
2. the method for claim 1, is characterized in that, after described first tunnel router confirms that described second tunnel router breaks down, described method comprises further:
Described first tunnel router sends fault notification message to mapping server, carries the information that described second tunnel router breaks down in described fault notification message; To make described mapping server after receiving described fault notification message, for described second tunnel router starts second timer T2, if do not receive the message from described second tunnel router before described second timer T2 time-out, then confirm that described second tunnel router breaks down, and be fault by record identification corresponding for described second tunnel router in end mark EID, the route locating RLOC mapping table of local maintenance.
3. method as claimed in claim 2, is characterized in that, after described first tunnel router confirms that described second tunnel router breaks down, described method comprises further:
Described first tunnel router is that described second tunnel router starts the 3rd timer T3; Wherein, the time-out time of described 3rd timer T3 is greater than the time-out time of described second timer T2;
If the LISP that the first tunnel router received from the second tunnel router before described 3rd timer T3 time-out monitors message, described first tunnel router confirms the second tunnel router fault recovery, and determine that the IP address of described second tunnel router is not the IP address of this first tunnel router, and cancel the route of carrying the IP address of described second tunnel router outwards issued; Described first tunnel router sends fault recovery message to mapping server, carries the information of described second tunnel router fault recovery in described fault recovery message; To make described mapping server after receiving fault recovery message, remove the failure identification that described in EID, RLOC mapping table, the second tunnel router is corresponding;
If the LISP that the first tunnel router did not receive from the second tunnel router before described 3rd timer T3 time-out monitors message, described first tunnel router confirms that the second tunnel router fault cannot be recovered, and determine that the IP address of the second tunnel router is not the IP address of this first tunnel router, and cancel the route of carrying the IP address of described second tunnel router outwards issued; Described first tunnel router sends fault to mapping server cannot recover message, and described fault cannot recover to carry in message the information that the second tunnel router fault cannot be recovered; To make described mapping server after receiving fault and message cannot be recovered, from EID, RLOC mapping table, delete the record that the second tunnel router is corresponding.
4. the method that restrains of position and identity separated protocol LISP territory fault detect, it is characterized in that, comprise the first tunnel router and the second tunnel router in described LISP territory, described method comprises:
Mapping server receives the fault notification message from described first tunnel router, carries the information that described second tunnel router breaks down in described fault notification message; Wherein, described fault notification message is that described first tunnel router utilizes described second tunnel router of first timer T1 confirmation to break down, and determine that the IP address of described second tunnel router is the IP address of described first tunnel router, and outwards to issue carry the route of the IP address of described second tunnel router after send;
Described mapping server is that described second tunnel router starts second timer T2; If do not receive the message from described second tunnel router before described second timer T2 time-out, then described mapping server confirms that described second tunnel router breaks down, and be fault by record identification corresponding for described second tunnel router in end mark EID, the route locating RLOC mapping table of local maintenance;
Described mapping server is sending described EID to the tunnel router in other LISP territory, during record in RLOC mapping table, record corresponding for described first tunnel router not being designated fault in described EID, RLOC mapping table is sent to the tunnel router in other LISP territory described.
5. method as claimed in claim 4, it is characterized in that, described method comprises further:
Described mapping server receives the fault recovery message from described first tunnel router, carries the information of described second tunnel router fault recovery in described fault recovery message; Wherein, described fault recovery message is that described first tunnel router utilizes the 3rd timer T3 to confirm described second tunnel router fault recovery, and determine that the IP address of described second tunnel router is not the IP address of described first tunnel router, and cancel outwards to issue carry the route of the IP address of described second tunnel router after send; Described mapping server, after receiving described fault recovery message, removes the failure identification that described in described EID, RLOC mapping table, the second tunnel router is corresponding; Or,
Described mapping server receives cannot recover message from the fault of described first tunnel router, and described fault cannot recover to carry in message the information that described second tunnel router fault cannot be recovered; Wherein, it is that described first tunnel router utilizes the described second tunnel router fault of the 3rd timer T3 confirmation to recover that described fault cannot recover message, and determine that the IP address of described second tunnel router is not the IP address of described first tunnel router, and cancel outwards to issue carry the route of the IP address of described second tunnel router after send; Described mapping server, after receiving described fault and cannot recovering message, deletes record corresponding to the second tunnel router from described EID, RLOC mapping table.
6. a network equipment, it is characterized in that, comprise the first tunnel router and the second tunnel router in position and identity separated protocol LISP territory, the described network equipment is as described first tunnel router in described LISP territory, and described first tunnel router specifically comprises:
Starting module, for starting first timer T1 for described second tunnel router, and receiving described second tunnel router periodically to the LISP monitoring message that described first tunnel router sends; Wherein, the time-out time of described first timer T1 is greater than the transmission interval that LISP monitors message;
Determination module, during for not receiving the LISP monitoring message from the second tunnel router before described first timer T1 time-out when the first tunnel router, confirms that the second tunnel router breaks down;
Sending module, for determining that the IP address of described second tunnel router is the IP address of described first tunnel router, and outwards issues the route of carrying the IP address of described second tunnel router.
7. the network equipment as claimed in claim 6, is characterized in that,
Described sending module, is further used for, after described determination module confirms that described second tunnel router breaks down, sending fault notification message, carry the information that described second tunnel router breaks down in described fault notification message to mapping server; To make described mapping server after receiving described fault notification message, for described second tunnel router starts second timer T2, if do not receive the message from described second tunnel router before described second timer T2 time-out, then confirm that described second tunnel router breaks down, and be fault by record identification corresponding for described second tunnel router in end mark EID, the route locating RLOC mapping table of mapping server local maintenance.
8. the network equipment as claimed in claim 7, is characterized in that,
Described startup module, also for after confirming that described second tunnel router breaks down at described determination module, is that described second tunnel router starts the 3rd timer T3; Wherein, the time-out time of described 3rd timer T3 is greater than the time-out time of described second timer T2;
Described determination module, time also for receiving the LISP monitoring message from the second tunnel router before described 3rd timer T3 time-out when the first tunnel router, confirms the second tunnel router fault recovery; Described sending module, also for determining that the IP address of described second tunnel router is not the IP address of described first tunnel router, and cancels the route of carrying the IP address of described second tunnel router outwards issued; Send fault recovery message to mapping server, in described fault recovery message, carry the information of described second tunnel router fault recovery; To make described mapping server after receiving fault recovery message, remove the failure identification that described in EID, RLOC mapping table, the second tunnel router is corresponding;
Described determination module, time also for not receiving the LISP monitoring message from the second tunnel router before described 3rd timer T3 time-out when the first tunnel router, confirms that the second tunnel router fault cannot be recovered; Described sending module, also for determining that the IP address of the second tunnel router is not the IP address of described first tunnel router, and cancels the route of carrying the IP address of described second tunnel router outwards issued; Send fault to mapping server and cannot recover message, described fault cannot recover to carry in message the information that the second tunnel router fault cannot be recovered; To make mapping server after receiving fault and message cannot be recovered, from EID, RLOC mapping table, delete the record that the second tunnel router is corresponding.
9. a mapping server, is characterized in that, comprise the first tunnel router and the second tunnel router in position and identity separated protocol LISP territory, described mapping services implement body comprises:
Receiver module, for receiving the fault notification message from described first tunnel router, carries the information that described second tunnel router breaks down in described fault notification message; Wherein, described fault notification message is that described first tunnel router utilizes described second tunnel router of first timer T1 confirmation to break down, and determine that the IP address of described second tunnel router is the IP address of described first tunnel router, and outwards to issue carry the route of the IP address of described second tunnel router after send;
Processing module, for starting second timer T2 for described second tunnel router; If do not receive the message from described second tunnel router before described second timer T2 time-out, then confirm that described second tunnel router breaks down, and be fault by record identification corresponding for described second tunnel router in end mark EID, the route locating RLOC mapping table of described mapping server local maintenance;
Sending module, for sending described EID to the tunnel router in other LISP territory, during record in RLOC mapping table, record corresponding for described first tunnel router not being designated fault is sent to the tunnel router in other LISP territory described in described EID, RLOC mapping table.
10. mapping server as claimed in claim 9, is characterized in that,
Described receiver module, also for receiving the fault recovery message from described first tunnel router, carries the information of described second tunnel router fault recovery in described fault recovery message; Wherein, described fault recovery message is that described first tunnel router utilizes the 3rd timer T3 to confirm described second tunnel router fault recovery, and determine that the IP address of described second tunnel router is not the IP address of described first tunnel router, and cancel outwards to issue carry the route of the IP address of described second tunnel router after send; Described processing module, also for after receiving described fault recovery message, removes the failure identification that described in described EID, RLOC mapping table, the second tunnel router is corresponding; Or,
Described receiver module, also cannot recover message for the fault received from described first tunnel router, and described fault cannot recover to carry in message the information that the second tunnel router fault cannot be recovered; Wherein, it is that described first tunnel router utilizes the described second tunnel router fault of the 3rd timer T3 confirmation to recover that described fault cannot recover message, and determine that the IP address of the second tunnel router is not the IP address of described first tunnel router, and cancel outwards to issue carry the route of the IP address of described second tunnel router after send; Described processing module, also for after receiving described fault and cannot recovering message, deletes record corresponding to the second tunnel router from described EID, RLOC mapping table.
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