CN106130914B - Host migration method and device - Google Patents
Host migration method and device Download PDFInfo
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- CN106130914B CN106130914B CN201610462787.2A CN201610462787A CN106130914B CN 106130914 B CN106130914 B CN 106130914B CN 201610462787 A CN201610462787 A CN 201610462787A CN 106130914 B CN106130914 B CN 106130914B
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Abstract
The embodiment of the invention provides a host migration method and a host migration device, which are applied to a mapping server MS/a mapping resolver MR, and the method comprises the following steps: receiving first registration information sent by an xTR, wherein the first registration information comprises an EID, an RLOC and a version number of the EID; searching second registration information corresponding to the EID which is locally stored; and if the version number in the first registration information is greater than the version number in the second registration information, updating the second registration information stored locally into the first registration information. The embodiment can shorten the registration time of the host with migration on the MS/MR.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a host migration method and apparatus in a LISP (location Identity Separation Protocol) network.
Background
LISP (location Identity Separation Protocol) is a network Protocol with separated location and Identity, and the LISP network forms two independent address spaces, namely, an EID (Endpoint IDentifier) space and an RLOC (Routing router location) space. Wherein, the EID is a host address of a communication endpoint and is used for indicating the identity of the host; RLOC is the address of the LISP router indicating the location of the router to which the host is connected. The xTR is a general term for an ITR (Ingress Tunnel Router) and an ETR (egress Tunnel Router), and indicates that the Router has ITR and/or ETR capabilities. The xTR stores EID-RLOC mapping relation, and the MS/MR (Map Server, mapping Server, mapping resolver) maintains more comprehensive EID-RLOC mapping relation. When a host migrates between different data centers, the xTR needs to register the host in the MS/MR in order to update the EID-RLOC mapping relationship in the MS/MR.
In the prior art, as shown in fig. 1, when host a in data center DC2 migrates into data center DC1, xTR1 in DC1 senses the migration of host a, and periodically registers host a with the MS/MR, which then periodically notifies the tunnel routers in DC1 and DC2 that host a is currently at DC 1. However, the xTR2 of DC2 also periodically registers host a with the MS/MR before receiving the notification. That is, before the notification reaches xTR2 at DC2, the MS/MR may receive a registration of xTR2 with host A, and thus the MS/MR may assume that host A has migrated back to xTR 2. In this case, xTR1 will not register host a with the MS/MR again until it senses the immigration of host a again, which may occur many times until eventually the tunnel routers in DC1 and DC2 both know that host a is currently located at xTR1, resulting in a longer time to complete the registration after host migration. Therefore, after the migration of the host occurs, the tunnel router may take a long time to finally complete the registration of the host to be migrated on the MS/MR.
Disclosure of Invention
The embodiment of the invention aims to provide a host migration method and a host migration device, which can shorten the registration time of a host which is migrated on an MS/MR.
In order to achieve the above object, the present invention discloses a host migration method applied to a mapping server MS/mapping resolver MR, the method comprising:
receiving first registration information sent by a tunnel router xTR, wherein the first registration information comprises an Endpoint Identifier (EID), a Router Location (RLOC) and a version number of the EID;
searching second registration information corresponding to the EID which is locally stored;
and if the version number in the first registration information is greater than the version number in the second registration information, updating the second registration information stored locally into the first registration information.
In order to achieve the above object, the present invention discloses a host migration apparatus applied to a mapping server MS/mapping resolver MR, the apparatus comprising:
the system comprises a receiving module, a sending module and a receiving module, wherein the receiving module is used for receiving first registration information sent by a tunnel router xTR, and the first registration information comprises an endpoint identifier EID, a router location RLOC and a version number of the EID;
the searching module is used for searching for second registration information corresponding to the EID which is locally stored;
and the updating module is used for updating the second registration information stored locally into the first registration information if the version number in the first registration information is greater than the version number in the second registration information.
As can be seen from the foregoing technical solutions, in the embodiments of the present invention, after receiving first registration information including an EID, an RLOC, and a version number of the EID, which is sent by an xTR, an MS/MR queries second registration information corresponding to the locally stored EID, and when a version number in the first registration information is greater than a version number in the second registration information, updates the locally stored second registration information to the first registration information.
That is to say, in the embodiment of the present invention, the MS/MR compares the version number of the new first registration information corresponding to the EID with the version number of the old second registration information, and when the version number of the first registration information is larger, it indicates that the first registration information is the latest registration information, that is, the second registration information is updated to the first registration information, thereby avoiding a problem that the MS/MR cannot determine which registration is the latest registration, and the xTR may need to register the host to be migrated multiple times, and thus, the registration duration of the host that migrates on the MS/MR can be shortened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of a scenario of host migration in a LISP network;
fig. 2 is a schematic flowchart of a host migration method according to an embodiment of the present invention;
fig. 3 is another schematic flowchart of a host migration method according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a host migration method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a host migration apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a host migration apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a host migration apparatus according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a host migration method and a host migration device, which can shorten the registration time of a host which is migrated on an MS/MR.
The present invention will be described in detail below with reference to specific examples.
Fig. 2 is a schematic flowchart of a host migration method provided in an embodiment of the present invention, applied to a mapping server MS/mapping resolver MR, where the method includes the steps of:
step S201: and receiving first registration information sent by the tunnel router xTR.
The first registration information comprises an Endpoint Identifier (EID), a Router Location (RLOC) and a version number of the EID.
It will be appreciated that xTR typically sends first registration information to the MS/MR in both cases, when a new migrating host exists and is registered for the first time, and when the host is periodically registered with the MS or MR after the host migrates.
In practical applications, the version number in this embodiment may be represented by a number, for example, when the host migrates, the version number of the EID currently and locally stored by the xTR is 2, and then the version number in the first registration information is 2+1 — 3. Of course, the version number may also be represented by letters, for example, when the host migrates, the version number of the EID currently stored locally by the xTR is C, then the version number in the first registration message is D (the letter after C in 26 english letters), and the letter after C in 26 english letters is considered to be larger than the letter before. Of course, the representation of the version number may include a variety of implementations.
Step S202: and searching second registration information corresponding to the EID which is locally stored.
The second registration information also includes the EID, the RLOC, the version number of the EID, and the like.
Step S203: and if the version number in the first registration information is greater than the version number in the second registration information, updating the second registration information stored locally into the first registration information.
When the version number in the first registration information is not greater than the version number in the second registration information, the method may further include: the received first registration information is discarded. That is, in this case, the first registration information is not the latest registration information.
In this step, in order to more accurately determine that the first registration information is the latest registration information, before the second registration information stored locally is updated to the first registration information, in addition to determining whether the version number in the first registration information is greater than the version number in the second registration information, it may be determined whether the RLOC in the first registration information is different from the RLOC in the second registration information. And if the above judgment results are all yes, the first registration information is the latest registration information for registering the EID.
In practical applications, the version number in the registration information may become large due to an error during the process of periodically sending the registration information to the MS/MR, and at this time, the RLOC in the registration information does not change, so that the registration information does not need to be updated.
As can be seen from the above, in this embodiment, the MS/MR compares the version number of the new first registration information corresponding to the EID with the version number of the old second registration information, and when the version number of the first registration information is larger, it indicates that the first registration information is the latest registration information, that is, the second registration information is updated to the first registration information, thereby avoiding a problem that the MS/MR cannot determine which registration is the latest registration, and the xrr may need to register the host to be migrated multiple times, so that the registration duration of the host that migrates on the MS/MR can be shortened.
In the embodiment shown in fig. 2, while step S203 is executed, that is, when the second registration information stored locally is updated to the first registration information, the latest version number information may also be sent to the subscribers corresponding to the EID, so that the subscribers update their own information. That is, the method may further include the following steps, see the flow chart of fig. 3:
step S301: and locally searching a subscriber RLOC corresponding to the EID.
The subscriber RLOC stored in the MS/MR may be pre-configured, or may be added after the MS/MR receives the subscription request of the xTR.
Step S302: and sending first registration information to the corresponding xTR according to the searched subscriber RLOC, so that the xTR corresponding to the subscriber RLOC updates the version number of the EID recorded locally to the version number in the first registration information.
It is understood that, in step S302, the EID and the corresponding version number may be sent only to the corresponding xTR, so that the latest version number of the EID can also be sent to the xTR corresponding to the RLOC of the subscriber.
As can be seen from the above, in this embodiment, the xTR also stores the version number of the EID to which it subscribes, and when the registration information of the EID changes, the MS/MR transmits the latest registration information to the xTR, so that the xTR updates the version number of the EID.
In the embodiment shown in fig. 2, if the first registration information is registration information generated by the xTR during host migration, the version number in the first registration information is the version number of the EID currently and locally stored by the xTR during host migration plus 1. And if the first registration information is the registration information periodically sent by the xTR after the host is migrated, the version number in the first registration information is the version number of the EID locally stored by the xTR.
In the first case, when the host migrates, the first registration information is the latest registration information with a version number larger than that in the second registration information, and then the MS/MR updates the second registration information to the first registration information.
In the second case, after the host moves in, the first registration message is a registration message sent periodically, where the version number is equal to the version number in the second registration message, and the MS/MR discards the first registration message.
In the embodiment shown in fig. 2, the method may further include the following steps, which may be referred to as the flowchart shown in fig. 4:
step S401: and receiving subscription information sent by the xTR, wherein the subscription information comprises the RLOC and the EID of the xTR.
Specifically, which EIDs are subscribed by the xTR may be preset or obtained according to a preset rule, which is not limited in the present invention.
Step S402: and taking the RLOC of the xTR as the subscriber RLOC, and locally recording the mapping relation between the subscriber RLOC and the subscribed EID.
It should be noted that the flowchart shown in fig. 4 is only one implementation, and the combination of steps S401 and S402 with the embodiment shown in fig. 2 may also include other various implementations, which are not listed here.
The present application will be described in detail with reference to specific examples.
To illustrate with the schematic shown in FIG. 1, EID for host A is 10.1.1.66, which originally connected to xTR2 of data center DC2, and RLOC for xTR2 is 2.2.2.2. Host a now migrates to DC1 at xTR1, where RLOC for xTR1 is 1.1.1.1.
The xTR1 senses the immigration of the host a, determines that the version number in the first registration information is 2+1, that is, 3, and the content of the first registration information is as follows, where the version number of the EID of the host a currently stored locally is 2:
EID：10.1.1.66；RLOC：1.1.1.1；Version：3
the xTR1 sends the first registration information to the MS/MR to register migrating host a. The MS/MR receives the first registration information sent by the xTR1, and searches for second registration information corresponding to the EID stored locally, where the content of the searched second registration information is as follows:
EID：10.1.1.66；RLOC：2.2.2.2；Version：2
and the MS/MR judges that the version number 3 in the first registration information is greater than the version number 2 in the second registration information, so that the second registration information stored locally is replaced by the first registration information. At this point, registration with migration host a is completed.
The MS/MR locally searches a subscriber RLOC corresponding to the EID, and the searched subscriber RLOC comprises the following contents:
xTR1：1.1.1.1；xTR2：2.2.2.2；xTR3：3.3.3.3
the MS/MR transmits the first registration information to the above three xtrs so that the xtrs 1, xTR2, and xTR3 update the version number of the EID of the respective local record to the version number in the first registration information.
The xTR1 also periodically sends the first registration information to the MS/MR after the first registration for migrating host a is completed. The content of the first registration information sent by the xTR1 received by the MS/MR is as follows:
EID：10.1.1.66；RLOC：1.1.1.1；Version：3
the MS/MR finds, according to the EID in the first registration information, that the second registration information corresponding to the EID includes the following contents:
EID：10.1.1.66；RLOC：1.1.1.1；Version：3
the MS/MR judges that the version number 3 in the first registration information is not larger than the version number 3 in the second registration information, thereby discarding the first registration information.
Fig. 5 is a schematic structural diagram of a host migration apparatus applied to a mapping server MS/mapping resolver MR according to an embodiment of the present invention, where the apparatus includes a receiving module 501, a searching module 502, and an updating module 503;
the receiving module 501 is configured to receive first registration information sent by an xTR, where the first registration information includes an EID, an RLOC, and a version number of the EID;
a searching module 502, configured to search for second registration information corresponding to the locally stored EID;
an updating module 503, configured to update the second registration information stored locally to the first registration information if the version number in the first registration information is greater than the version number in the second registration information.
In the embodiment shown in fig. 5, the apparatus may further include a sending module 601, see the schematic structural diagram shown in fig. 6, which corresponds to the embodiment of the method shown in fig. 3;
the searching module 502 is further configured to locally search the subscriber RLOC corresponding to the EID when the second registration information stored locally is updated to the first registration information;
the sending module 601 is configured to send the first registration information to the corresponding xTR according to the found subscriber RLOC, so that the xTR corresponding to the subscriber RLOC updates the version number of the EID recorded locally to the version number in the first registration information.
In the embodiment shown in fig. 5, if the first registration information is registration information generated by the xTR when the host migrates, the version number in the first registration information is the version number of the EID currently and locally stored by the xTR when the host migrates plus 1;
and if the first registration information is registration information periodically sent by the xTR after host migration, the version number in the first registration information is the version number of the EID locally stored by the xTR.
In the embodiment shown in fig. 5, the apparatus may further include a discarding module (not shown in the figure);
the discarding module is configured to discard the received first registration information when the version number in the first registration information is not greater than the version number in the second registration information.
In the embodiment shown in fig. 5, the apparatus may further include a recording module 701, see the schematic structural diagram shown in fig. 7, which corresponds to the embodiment of the method shown in fig. 4;
the receiving module 501 is further configured to receive subscription information sent by an xTR, where the subscription information includes an RLOC and a subscribed EID of the xTR;
the recording module 701 is configured to use the RLOC of the xTR as a subscriber RLOC, and locally record a mapping relationship between the subscriber RLOC and the subscribed EID.
Since the device embodiment is obtained based on the method embodiment and has the same technical effect as the method, the technical effect of the device embodiment is not described herein again.
For the apparatus embodiment, since it is substantially similar to the method embodiment, it is described relatively simply, and reference may be made to some descriptions of the method embodiment for relevant points.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood by those skilled in the art that all or part of the steps in the above embodiments can be implemented by hardware associated with program instructions, and the program can be stored in a computer readable storage medium. The storage medium referred to herein is a ROM/RAM, a magnetic disk, an optical disk, or the like.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A host migration method applied to a Mapping Server (MS)/Mapping Resolver (MR), the method comprising:
receiving first registration information sent by a tunnel router xTR, wherein the first registration information comprises an Endpoint Identifier (EID), a Router Location (RLOC) and a version number of the EID;
searching second registration information corresponding to the EID which is locally stored;
and if the version number in the first registration information is greater than the version number in the second registration information and the RLOC in the first registration information is different from the RLOC in the second registration information, updating the second registration information which is locally stored as the first registration information.
2. The method according to claim 1, wherein when the second registration information saved locally is updated to the first registration information, the method further comprises:
locally searching a subscriber RLOC corresponding to the EID;
and sending the first registration information to the corresponding xTR according to the searched subscriber RLOC, so that the xTR corresponding to the subscriber RLOC updates the version number of the EID recorded locally to the version number in the first registration information.
3. The method of claim 2,
if the first registration information is generated by xTR when the host computer is migrated, the version number in the first registration information is the version number of the EID locally stored by the xTR when the host computer is migrated plus 1;
and if the first registration information is registration information periodically sent by xTR after host migration, the version number in the first registration information is the version number of the EID locally stored by the xTR.
4. The method of claim 1, wherein when the version number in the first registration information is not greater than the version number in the second registration information, the method further comprises: discarding the received first registration information.
5. The method of claim 1, further comprising:
receiving subscription information sent by an xTR, wherein the subscription information comprises an RLOC of the xTR and an EID of a subscription;
and taking the RLOC of the xTR as the subscriber RLOC, and locally recording the mapping relation between the subscriber RLOC and the subscribed EID.
6. Host migration apparatus, applied to a mapping server MS/mapping resolver MR, comprising:
the system comprises a receiving module, a sending module and a receiving module, wherein the receiving module is used for receiving first registration information sent by a tunnel router xTR, and the first registration information comprises an endpoint identifier EID, a router location RLOC and a version number of the EID;
the searching module is used for searching for second registration information corresponding to the EID which is locally stored;
and the updating module is used for updating the second registration information which is locally stored into the first registration information if the version number in the first registration information is greater than the version number in the second registration information and the RLOC in the first registration information is different from the RLOC in the second registration information.
7. The apparatus of claim 6, further comprising a transmitting module;
the searching module is further configured to locally search the subscriber RLOC corresponding to the EID when the second registration information stored locally is updated to the first registration information;
the sending module is configured to send the first registration information to the corresponding xTR according to the found subscriber RLOC, so that the xTR corresponding to the subscriber RLOC updates the version number of the EID recorded locally to the version number in the first registration information.
8. The apparatus according to claim 7, wherein if the first registration information is registration information generated by xTR at host migration, a version number in the first registration information is a version number of the EID locally stored by xTR at host migration plus 1;
and if the first registration information is registration information periodically sent by xTR after host migration, the version number in the first registration information is the version number of the EID locally stored by the xTR.
9. The apparatus of claim 6, further comprising a discard module;
the discarding module is configured to discard the received first registration information when the version number in the first registration information is not greater than the version number in the second registration information.
10. The apparatus of claim 6, further comprising a logging module;
the receiving module is further configured to receive subscription information sent by an xTR, where the subscription information includes an RLOC and a subscribed EID of the xTR;
and the recording module is used for taking the RLOC of the xTR as the subscriber RLOC and locally recording the mapping relation between the subscriber RLOC and the subscribed EID.
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| US9020487B2 (en) * | 2010-10-14 | 2015-04-28 | At&T Mobility Ii Llc | Over-the-air content management of wireless equipment in confined-coverage wireless networks |
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| CN102088390A (en) * | 2009-12-08 | 2011-06-08 | 中兴通讯股份有限公司 | Implementation method of user mobility |
| CN103167464A (en) * | 2011-12-09 | 2013-06-19 | 中兴通讯股份有限公司 | Method for triggering and updating mobile node mapping information, mapping server (MS) and mobile node (MN) |
| CN105591918A (en) * | 2015-08-31 | 2016-05-18 | 杭州华三通信技术有限公司 | Mapping registration method and device in locator/identity separation protocol (LISP) network |
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