CN102299974B - A kind of method and apparatus realizing IPv6 prefix assignment - Google Patents
A kind of method and apparatus realizing IPv6 prefix assignment Download PDFInfo
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Abstract
The invention discloses a kind of method and apparatus realizing IPv6 prefix assignment, all the IPv6 prefix of distribution can be placed in the PIO field of carried router notification message, and IPv6 prefix assignment mark is set in carried router notification message; The carried router notification message carrying IPv6 prefix and IPv6 prefix assignment mark is sent to IPv6 prefix request side.The present invention realizes the method and apparatus of IPv6 prefix assignment, provide a kind of easy operation thinking carrying out completing user Site IP v6 prefix assignment based on ND agreement, do not need extra mechanism, implementation method is simple, thus solve the equipment room Interoperability that in network design, plurality of distribution mechanism is introduced, and decrease the expense of equipment, make to run more stable and healthy and strong.
Description
Technical field
The present invention relates to the communications field, be specifically related to one and realize the method and apparatus that IPv6 prefix (Prefix) distributes.
Background technology
The high speed development of Internet and the sharply expansion of scale, make existing IPv4 in autgmentability, face a lot of problem, and such as address space is not enough.So be developed IPv6, object is for solving the problem.
Neighbor Discovery Protocol (NeighborDiscoveryProtocol) in IPv6 protocol suite can be called ND agreement for short, the functions such as the IPv6 address configuration of main frame, address resolution and router discovery can be used to, be easy to realize and enormously simplify network design.
In the deployment scenario of IPv6, for user site (Customer ' sSites), as the user side equipment (Customerpremisesequipment of its gateway, CPE) need to the provider edge equipment (ProviderEdgedevice being positioned at service provider side, PE) IPv6 prefix is applied for, for the address assignment of website.
At present, the distribution of user site IPv6 prefix itself cannot be completed by ND agreement, but need to be realized by the PrefixDelegation scaling option function of DHCP version 6 (DynamicHostconfigurationProtocolversion6, DHCPv6).
Above-mentioned existing user site IPv6 prefix assignment method, except ND protocol suite itself, also needs to introduce extra mechanism, and the coexisting to bring to the interoperability of equipment room of number of mechanisms has a strong impact on; In addition, also increase the expense of equipment realization and operation and bring destabilizing factor.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and apparatus realizing IPv6 prefix assignment, adopts ND agreement to complete the distribution of IPv6 prefix, does not need extra mechanism.
For achieving the above object, technical scheme of the present invention is achieved in that
Realize a method for IPv6 prefix assignment, the method comprises:
The IPv6 prefix of distribution is placed in the PIO field of router advertisement (RouterAdvertisement, RA) message, and IPv6 prefix assignment mark is set in RA message; The RA message carrying IPv6 prefix and IPv6 prefix assignment mark is sent to IPv6 prefix request side.
The method of the described IPv6 of setting prefix assignment mark is:
The value of L position and A position in PIO field is set to 0; Or,
Reserved field in PIO field arranges the flag representing distributing IP v6 prefix; Or,
The flag representing distributing IP v6 prefix is set in other position of RA message.
The method comprises the process of described IPv6 prefix request side to the RA message received further:
Judge in the RA message received, whether to be provided with IPv6 prefix assignment mark, be provided with IPv6 prefix assignment mark, and when the IPv6 prefix in RA message has been present in local data base, refreshing the age timer of corresponding IPv6 prefix entry in local data base; Be provided with IPv6 prefix assignment mark, and when the IPv6 prefix in RA message is not present in local data base, the IPv6 prefix in this RA message is being added local data base, and corresponding age timer is set for this IPv6 prefix.
The method comprises described IPv6 prefix request side further and safeguards process to the local data base of the IPv6 prefix received:
When the age timer of IPv6 prefix entry is in the local database overtime, starts for this IPv6 prefix entry and suppress timer; Before suppression timer expired, judge whether the age timer corresponding to described IPv6 prefix entry is refreshed, if judged result is yes, then delete described suppression timer; Otherwise, described IPv6 prefix entry is deleted from local data base.
Before described IPv6 prefix is placed in RA message, the method comprises further:
Receive query router (RouterSolicitation, the RS) message from IPv6 prefix request side, determine the IPv6 prefix that will distribute according to received RS message.
Realize a device for IPv6 prefix assignment, this device comprises processing module, sending module; Wherein,
Described processing module, for the IPv6 prefix of distribution being placed in the PIO field of RA message, and arranges IPv6 prefix assignment mark in RA message;
Described sending module, sends to IPv6 prefix request side for the RA message described processing module being completed process.
Described processing module arrange IPv6 prefix assignment mark time, for:
The value of L position and A position in PIO field is set to 0; Or,
Reserved field in PIO field arranges the flag representing distributing IP v6 prefix; Or,
The flag representing distributing IP v6 prefix is set in other position of RA message.
Described IPv6 prefix request side comprises IPv6 prefix maintenance unit, age timer administrative unit; These two unit are mutual each other, for:
IPv6 prefix maintenance unit judges whether be provided with IPv6 prefix assignment mark in the RA message received, be provided with IPv6 prefix assignment mark, and when the IPv6 prefix in RA message has been present in local data base, IPv6 prefix maintenance unit notice age timer administrative unit refreshes the age timer of corresponding IPv6 prefix entry in local data base; Be provided with IPv6 prefix assignment mark, and when the IPv6 prefix in RA message is not present in local data base, IPv6 prefix in this RA message is added local data base by IPv6 prefix maintenance unit, and notifies that age timer administrative unit arranges corresponding age timer for this IPv6 prefix.
Described IPv6 prefix request side comprises further and suppresses timer management unit, itself and IPv6 prefix maintenance unit, age timer administrative unit each other alternately, for:
When the age timer of age timer administrative unit IPv6 prefix entry is in the local database overtime, notice suppresses timer management unit to start for this IPv6 prefix entry and suppresses timer; Before suppression timer expired, age timer administrative unit judges whether the age timer corresponding to described IPv6 prefix entry is refreshed, if judged result is yes, age timer administrative unit notice suppresses to suppress timer described in timer management element deletion; Otherwise described IPv6 prefix entry is deleted by age timer administrative unit notice IPv6 prefix maintenance unit from local data base.
This device comprises read module further, sends to described processing module for the RS message that receives from IPv6 prefix request side;
Described processing module, is further used for determining according to received RS message the IPv6 prefix that will distribute.
The present invention realizes the method and apparatus of IPv6 prefix assignment, provide a kind of easy operation thinking carrying out completing user Site IP v6 prefix assignment based on ND agreement, do not need extra mechanism, implementation method is simple, thus solve the equipment room Interoperability that in network design, plurality of distribution mechanism is introduced, and decrease the expense of equipment, make to run more stable and healthy and strong.
Accompanying drawing explanation
Fig. 1 is the installation drawing that one embodiment of the invention realizes IPv6 prefix assignment;
Fig. 2 is the flow chart that one embodiment of the invention realizes IPv6 prefix assignment;
Fig. 3 is the IPv6 prefix local data base maintenance process figure of one embodiment of the invention;
Fig. 4 is the general flow chart that the present invention realizes IPv6 prefix assignment.
Embodiment
In general, setting as shown in Figure 1 can be carried out.Be the installation drawing that one embodiment of the invention realizes IPv6 prefix assignment see Fig. 1, Fig. 1, this device comprises:
Be positioned at the functional entity on PE:
Read module;
Processing module;
Sending module;
And, be positioned at the functional entity on CPE:
Receiver module.
During embody rule, the read module in PE for receiving the RS message from opposite end CPE, and reads the information such as the source address in message, transfers to processing module to do further process the information of acquisition afterwards.
Processing module can determine whether according to received RS message information and how select IPv6 prefix, and selected IPv6 prefix can be placed in the prefix information option (PrefixInformationOption of RA message, PIO) in field, and the value of L position and A position in PIO field is set to 0.
The RA message comprising IPv6 prefix and L position and A position 0 that processing module generates can be sent to opposite end CPE, as the response to received RS message by sending module.
Receiver module in CPE for receiving the RA message from opposite end PE, and reads the PIO field in message, and the PIO field contents according to reading carries out the maintenance of IPv6 prefix.As: judge whether I position in PIO field and A position are 0, if so, read further the IPv6 prefix in PIO field, and judge this IPv6 prefix entry whether Already in local data base, if existed, then refresh the value of the age timer of this IPv6 prefix entry; If there is no, then this IPv6 prefix entry added local data base and corresponding age timer is set, entering local data base maintenance process simultaneously.
When carrying out local data base and safeguarding, if the age timer of certain IPv6 prefix entry is overtime in local data base, then starts for this IPv6 prefix entry and suppress timer, and send RS message to opposite end PE.Before suppression timer expired, judge whether the age timer corresponding to described IPv6 prefix entry is refreshed, if judged result is yes, then deletes and suppress timer; Otherwise, this IPv6 prefix entry is deleted from local data base.
Be the flow chart that one embodiment of the invention realizes IPv6 prefix assignment see Fig. 2, Fig. 2, this flow process comprises the following steps:
After step 202:CPE sends RS message to PE, the read module in PE receives this RS message and reads the information such as source address wherein, transfers to processing module to do further process afterwards.
Processing module in step 204:PE determines whether according to received RS message information and how to select IPv6 prefix, and selected IPv6 prefix is placed in the PIO field of RA message, also the value of L position and A position in PIO field is set to 0.
The RA message that processing module generates by the sending module in step 206:PE sends to opposite end CPE, as the response to received RS message.
Receiver module in step 208:CPE receives the RA message from opposite end PE, and reads the PIO field in message.
Step 210: judge whether the value of L position and A position in the PIO field of the RA message received is 0, if be 0, then proceeds to step 212; Otherwise, proceed to step 218.
Step 212: judge whether the value of the IPv6 prefix in described PIO field is present in local data base, if existed, then proceeds to step 214; Otherwise, proceed to step 216.
Step 214: the age timer refreshing corresponding IPv6 prefix entry in local data base.Process ends.
Step 216: the described IPv6 prefix received is added local data base, and arranges corresponding age timer for this IPv6 prefix, can also enter local data base maintenance process simultaneously.Process ends.
Step 218: by described RA message according to existing ND agreement predetermined processing.
In Fig. 2, step 210 can have been unified by the receiver module in CPE to step 216, the notice that also can be sent according to receiver module by the respective handling module in CPE performs corresponding operating, as: age timer administrative unit can be set in the cpe, suppress timer management unit, IPv6 prefix maintenance unit, age timer administrative unit wherein, IPv6 prefix maintenance unit are fitted to each other operation, to perform the operation that step 210 to step 216 comprises, as:
Step 210:IPv6 prefix maintenance unit judges whether the value of L position and A position in the PIO field of the RA message received is 0, if be 0, then proceeds to step 212; Otherwise, proceed to step 218.
Whether the value of the IPv6 prefix that step 212:IPv6 prefix maintenance unit judges in described PIO field is present in local data base, if existed, then proceeds to step 214; Otherwise, proceed to step 216.
Step 214:IPv6 prefix maintenance unit notice age timer administrative unit refreshes the age timer of corresponding IPv6 prefix entry in local data base.Process ends.
The described IPv6 prefix received is added local data base by step 216:IPv6 prefix maintenance unit, and notifies that age timer administrative unit arranges corresponding age timer for this IPv6 prefix, can also enter local data base maintenance process simultaneously.Process ends.
Step 218:IPv6 prefix maintenance unit by described RA message according to existing ND agreement predetermined processing.
See the IPv6 prefix local data base maintenance process figure that Fig. 3, Fig. 3 are one embodiment of the invention, this flow process comprises the following steps:
Step 302: when the age timer of certain IPv6 prefix entry is overtime in the local database, starts for this IPv6 prefix entry and suppresses timer.
Step 304: send RS message to opposite end PE.
Step 306: before suppression timer expired, judge whether the age timer corresponding to described IPv6 prefix entry is refreshed, if judged result is yes, then proceed to step 308; Otherwise, proceed to step 310.
Step 308: delete described suppression timer.
Step 310: described IPv6 prefix entry is deleted from local data base.
It should be noted that, the IPv6 prefix local data base attended operation shown in Fig. 3 can be performed by CPE.Specifically, the age timer administrative unit in CPE can be applied, suppress timer management unit, IPv6 prefix maintenance unit is fitted to each other operation, perform the flow process shown in Fig. 3, during age timer time-out as: age timer administrative unit certain IPv6 prefix entry in the local database, notice suppresses timer management unit to start for this IPv6 prefix entry and suppresses timer.Before suppression timer expired, age timer administrative unit judges whether the age timer corresponding to described IPv6 prefix entry is refreshed, if judged result is yes, age timer administrative unit notice suppresses to suppress timer described in timer management element deletion; Otherwise described IPv6 prefix entry is deleted by age timer administrative unit notice IPv6 prefix maintenance unit from local data base.
It should be noted that, the object value of L position and A position in PIO field being set to 0 is to arrange IPv6 prefix assignment mark, knows that this RA message is for distributing IP v6 prefix to enable the functional entity receiving RA message according to this IPv6 prefix assignment mark.In actual applications, the mode arranging IPv6 prefix assignment mark is varied, as: the reserved field in PIO field arranges the IPv6 prefix assignment mark represented with flags such as numeral or character strings, or arranges similar IPv6 prefix assignment mark in other position of RA message.
Describe known in conjunction with above technology, the operation thinking that the present invention realizes IPv6 prefix assignment can represent as shown in Figure 4.Be the general flow chart that the present invention realizes IPv6 prefix assignment see Fig. 4, Fig. 4, this flow process comprises the following steps:
Step 410: the PIO field IPv6 prefix of distribution being placed in RA message, and IPv6 prefix assignment mark is set in RA message.
Step 420: the RA message carrying IPv6 prefix and IPv6 prefix assignment mark is sent to IPv6 prefix request side.
Visible in sum, no matter be method or device, the present invention realizes the technology of IPv6 prefix assignment, provide a kind of easy operation thinking carrying out completing user Site IP v6 prefix assignment based on ND agreement, do not need extra mechanism, implementation method is simple, thus solves the equipment room Interoperability that in network design, plurality of distribution mechanism is introduced, and decrease the expense of equipment, make to run more stable and healthy and strong.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. realize a method for IPv6 prefix assignment, it is characterized in that, the method comprises:
The IPv6 prefix of distribution is placed in the PIO field of router advertisement RA message, and IPv6 prefix assignment mark is set in RA message; The RA message carrying IPv6 prefix and IPv6 prefix assignment mark is sent to IPv6 prefix request side;
Wherein, the method for the described IPv6 of setting prefix assignment mark is: the value of L position and A position in PIO field is set to 0; Or the reserved field in PIO field arranges the flag representing distributing IP v6 prefix; Or, the flag representing distributing IP v6 prefix is set in other position of RA message.
2. method according to claim 1, is characterized in that, the method comprises the process of described IPv6 prefix request side to the RA message received further:
Judge in the RA message received, whether to be provided with IPv6 prefix assignment mark, be provided with IPv6 prefix assignment mark, and when the IPv6 prefix in RA message has been present in local data base, refreshing the age timer of corresponding IPv6 prefix entry in local data base; Be provided with IPv6 prefix assignment mark, and when the IPv6 prefix in RA message is not present in local data base, the IPv6 prefix in this RA message is being added local data base, and corresponding age timer is set for this IPv6 prefix.
3. method according to claim 2, is characterized in that, the method comprises described IPv6 prefix request side further and safeguards process to the local data base of the IPv6 prefix received:
When the age timer of IPv6 prefix entry is in the local database overtime, starts for this IPv6 prefix entry and suppress timer; Before suppression timer expired, judge whether the age timer corresponding to described IPv6 prefix entry is refreshed, if judged result is yes, then delete described suppression timer; Otherwise, described IPv6 prefix entry is deleted from local data base.
4. the method according to any one of claims 1 to 3, is characterized in that, before described IPv6 prefix is placed in RA message, the method comprises further:
Receive the query router RS message from IPv6 prefix request side, determine the IPv6 prefix that will distribute according to received RS message.
5. realize a device for IPv6 prefix assignment, it is characterized in that, this device comprises processing module, sending module; Wherein,
Described processing module, for the IPv6 prefix of distribution being placed in the PIO field of RA message, and arranges IPv6 prefix assignment mark in RA message;
Described sending module, sends to IPv6 prefix request side for the RA message described processing module being completed process;
Described processing module arrange IPv6 prefix assignment mark time, for: the value of L position and A position in PIO field is set to 0; Or the reserved field in PIO field arranges the flag representing distributing IP v6 prefix; Or, the flag representing distributing IP v6 prefix is set in other position of RA message.
6. device according to claim 5, is characterized in that, described IPv6 prefix request side comprises IPv6 prefix maintenance unit, age timer administrative unit; These two unit are mutual each other, for:
IPv6 prefix maintenance unit judges whether be provided with IPv6 prefix assignment mark in the RA message received, be provided with IPv6 prefix assignment mark, and when the IPv6 prefix in RA message has been present in local data base, IPv6 prefix maintenance unit notice age timer administrative unit refreshes the age timer of corresponding IPv6 prefix entry in local data base; Be provided with IPv6 prefix assignment mark, and when the IPv6 prefix in RA message is not present in local data base, IPv6 prefix in this RA message is added local data base by IPv6 prefix maintenance unit, and notifies that age timer administrative unit arranges corresponding age timer for this IPv6 prefix.
7. device according to claim 6, is characterized in that, described IPv6 prefix request side comprises further and suppresses timer management unit, itself and IPv6 prefix maintenance unit, age timer administrative unit each other alternately, for:
When the age timer of age timer administrative unit IPv6 prefix entry is in the local database overtime, notice suppresses timer management unit to start for this IPv6 prefix entry and suppresses timer; Before suppression timer expired, age timer administrative unit judges whether the age timer corresponding to described IPv6 prefix entry is refreshed, if judged result is yes, age timer administrative unit notice suppresses to suppress timer described in timer management element deletion; Otherwise described IPv6 prefix entry is deleted by age timer administrative unit notice IPv6 prefix maintenance unit from local data base.
8. the device according to any one of claim 5 to 7, is characterized in that, this device comprises read module further, sends to described processing module for the RS message that receives from IPv6 prefix request side;
Described processing module, is further used for determining according to received RS message the IPv6 prefix that will distribute.
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| US10044672B2 (en) | 2014-03-04 | 2018-08-07 | Hua Wei Device Co., Ltd. | IPv6 address assignment method and apparatus |
| CN104935677B (en) * | 2014-03-18 | 2019-10-18 | 中兴通讯股份有限公司 | A kind of NAT64 resource acquiring method and acquisition/distributor |
| CN108092841B (en) * | 2016-11-22 | 2022-09-02 | 中兴通讯股份有限公司 | Method, device and system for maintaining gateway routing information |
| CN107426345B (en) * | 2017-06-20 | 2020-07-28 | 普联技术有限公司 | Global address obtaining method and device of intranet equipment and storage medium |
| CN108848100B (en) * | 2018-06-27 | 2020-10-20 | 清华大学 | Stateful IPv6 address generation method and device |
| CN110650219B (en) * | 2019-09-06 | 2022-03-08 | 北京伯光时科技有限公司 | IPv6 address allocation method and device, electronic equipment and storage medium |
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