CN104144229A - Method and device for releasing and fast assigning IPv6 address - Google Patents
Method and device for releasing and fast assigning IPv6 address Download PDFInfo
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- CN104144229A CN104144229A CN201410355634.9A CN201410355634A CN104144229A CN 104144229 A CN104144229 A CN 104144229A CN 201410355634 A CN201410355634 A CN 201410355634A CN 104144229 A CN104144229 A CN 104144229A
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Abstract
The invention provides a method and device for releasing and fast assigning an IPv6 address. The method includes the steps that an IPv6 address applying message interacted between a dynamic host configuration protocol (DHCP)v6 client side and DHCPv6 servers and information in a corresponding response message are recorded, wherein the DHCPv6 client side and the DHCPv6 servers support the IPv6; the lease time period in the response message is modified, and the modified response message is sent to the DHCPv6 client side; a lease renewing message sent by the DHCPv6 client side is received, and the identification of the DHCPv6 server selected by the DHCPv6 client side is obtained according to the lease renewing message; according to the recorded information and the obtained identification of the DHCPv6 server selected by the DHCPv6 client side, the DHCPv6 servers which are not selected are determined; the DHCPv6 servers which are not selected are notified that the IPv6 address assigned for the DHCPv6 client side is released. Therefore, the use ratio of the address is increased.
Description
Technical field
The present invention relates to support the DHCP field of IPv6, particularly a kind of method and apparatus that discharges fast allocation IPv6 address.
Background technology
Along with improving constantly of the continuous increase of network size, network complexity, network configuration also becomes and becomes increasingly complex, and needs often to change IP for mobile host, so network manager has seemed unable to do what one wishes by manual configuration management ip address.In order to facilitate user's express delivery to access and exit network, improve the utilance of IP address resource, a kind of distribution mechanism-DHCP (Dynamic Host Configuration Protocol, DHCP) that automatically carries out IP address applies and gives birth to.DHCP adopts client/server mode of operation, is used for as the main frame parameter information such as distributing IP address dynamically.By the file a request application of allocation of parameters information of user end to server, server is returned as the parameter informations such as IP address that client is distributed, to realize the dynamic-configuration of the information such as IP address.
As shown in Figure 1, for DHCPv6 supports the fast allocation mode schematic diagram of mutual two message, DHCPv6 client sends the application message that carries Quick-return Rapid Commit option to DHCPv6 server, DHCPv6 server receives this application message, to DHCPv6 client, send the response message that carries Rapid Commit option, this response message carries the IP parameter information distributing into DHCPv6 client.
In network, there are a plurality of servers, client is received the response message of a plurality of servers, and client only can select a parameter information in response message to be configured, yet for there is no selecteed server, and do not know the address whether DHCPv6 client has used it to dispense, therefore only have by the time the available lifetime Shi Caihui that expires to discharge, but conventionally the lease term of validity be several hours to several days even longer, the parameter information that this period, non-selected server provided has been caused to waste.
The waste that the parameter information that prior art provides for this non-selected server causes, provide a kind of intermediate equipment between DHCPv6 client and DHCPv6 server (as Snooping, Relay, common Layer 2 switch etc.) on, monitor and record the equipment of the information in the mutual message between DHCPv6 client and DHCPv6 server, intermediate equipment structure Reconfigure (reconfiguring) message, and this is reconfigured to message send to DHCPv6 client, so that DHCPv6 client is returned to the message of carrying the DHCPv6 server identification of choosing, thereby obtain the DHCPv6 server identification that DHCPv6 client is chosen, determined non-selected DHCPv6 server, intermediate equipment, according to the non-selected DHCPv6 server identification of determining, sends to respectively corresponding non-selected DHCPv6 server by the Release message of structure, so that unchecked server is released to the parameter information that DHCPv6 client is distributed.
Yet the scheme of the prior art needs special client can process this to reconfigure message, therefore, the equipment of the waste that the prior art scheme causes for the parameter information that solves non-selected server and provide is not general.
Summary of the invention
In view of this, the invention provides a kind of method and apparatus that discharges fast allocation IPv6 address, the waste problem being caused with the IPv6 address that solves the non-selected server of prior art and provided.
The embodiment of the present invention provides a kind of method that discharges fast allocation IPv6 address, comprising:
Mutual IPv6 application IP addresses message and the information in corresponding response message between the dynamic host configuration protocol DHCP v6 client that IPv6 supported in record and DHCPv6 server;
The time period of leasing in response message is modified, and amended response message is sent to DHCPv6 client, wherein, amendedly lease the time period and be less than leasing the time period before modification;
Receive the renewed treaty message that DHCPv6 client sends, the sign of the DHCPv6 server of choosing according to this DHCPv6 client of this renewed treaty Receive message;
The sign of the DHCPv6 server of choosing according to the information of record and this DHCPv6 client of getting, determines not selected DHCPv6 server;
Notify not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
Preferably, the time period of leasing in described amended response message is 10 seconds.
Preferably, described DHCPv6 server is at least two.
Preferably, the information in described response message comprises: the sign of DHCPv6 server;
The sign of the described DHCPv6 server of choosing according to the information of record and this DHCPv6 client of getting, determines not selected DHCPv6 server, specifically comprises:
The sign for the DHCPv6 server in the response message of this IPv6 application IP addresses message of record and the sign of the DHCPv6 server of choosing getting are compared;
If not identical, determine that the indicated DHCPv6 server of sign of the DHCPv6 server of this record is not selected DHCPv6 server.
Preferably, the described IPv6 address of notifying not selected DHCPv6 server to be released to this DHCPv6 client distribution, specifically comprises:
By mode of unicast, to the not selected DHCPv6 server of determining, send release message, to notify not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
The embodiment of the present invention also provides a kind of equipment that discharges fast allocation IPv6 address, comprising:
Record cell, for recording IPv6 application IP addresses message mutual between the dynamic host configuration protocol DHCP v6 client of supporting IPv6 and DHCPv6 server and the information of corresponding response message;
Revise unit, modify for the time period of leasing to response message, and amended response message is sent to DHCPv6 client, wherein, amendedly lease the time period and be less than leasing the time period before modification;
Acquiring unit, the renewed treaty message sending for receiving DHCPv6 client, the sign of the DHCPv6 server of choosing according to this DHCPv6 client of this renewed treaty Receive message;
Determining unit, for the sign of the DHCPv6 server chosen according to the information of record and this DHCPv6 client of getting, determines not selected DHCPv6 server;
Notification unit, for notifying not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
Preferably, the time period of leasing in described amended response message is 10 seconds.
Preferably, described DHCPv6 server is at least two.
Preferably, the information in described response message comprises: the sign of DHCPv6 server;
Described determining unit, specifically for comparing the sign for the DHCPv6 server in the response message of this IPv6 application IP addresses message of record and the sign of the DHCPv6 server of choosing getting;
If not identical, determine that the indicated DHCPv6 server of sign of the DHCPv6 server of this record is not selected DHCPv6 server.
Preferably, described notification unit, specifically for by mode of unicast, sends release message to the not selected DHCPv6 server of determining, to notify not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
The embodiment of the present invention provides a kind of method and apparatus that discharges fast allocation IPv6 address, by monitoring and record DHCPv6 client and DHCPv6 server mutual IPv6 application IP addresses message and the information in corresponding response message in IPv6 application IP addresses process, by the lease time section to this response message, modify, make this DHCPv6 client to DHCPv6 server, send renewed treaty message according to amended lease time section, the sign of DHCPv6 server of choosing that can get according to this renewed treaty message and the information in the response message of record can be determined not selected DHCPv6 server, thereby can notify not selected server to be released to the IPv6 address that this DHCPv6 client is distributed, the waste problem that cause the IPv6 address that efficiently solving non-selected server provides, not selected DHCPv6 server can be used other DHCPv6 client to the IPv6 address assignment discharging, improved address service efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the fast allocation mode schematic diagram that DHCPv6 supports mutual two message;
Fig. 2 is the method flow diagram that the embodiment of the present invention provides;
Fig. 3 is embodiment of the present invention apparatus structure schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
A kind of method that discharges fast allocation IPv6 address that the embodiment of the present invention provides, the method comprises:
Mutual IPv6 application IP addresses message and the information in corresponding response message between the dynamic host configuration protocol DHCP v6 client that IPv6 supported in record and DHCPv6 server;
Lease time section in response message is modified, and amended response message is sent to DHCPv6 client, wherein, amendedly lease the time period and be less than leasing the time period before modification;
Receive the renewed treaty message that DHCPv6 client sends, the sign of the DHCPv6 server of choosing according to this DHCPv6 client of this renewed treaty Receive message;
The sign of the DHCPv6 server of choosing according to the information of record and this DHCPv6 client of getting, determines not selected DHCPv6 server;
Notify not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
According to such scheme, by monitoring and record DHCPv6 client and DHCPv6 server mutual IPv6 application IP addresses message and the information in corresponding response message in IPv6 application IP addresses process, by the lease time section to this response message, modify, make this DHCPv6 client to DHCPv6 server, send renewed treaty message according to amended lease time section, the sign of DHCPv6 server of choosing that can get according to this renewed treaty message and the information in the response message of record can be determined not selected DHCPv6 server, thereby can notify not selected server to be released to the IPv6 address that this DHCPv6 client is distributed, the waste problem that cause the IPv6 address that efficiently solving non-selected server provides, not selected DHCPv6 server can be used other DHCPv6 client to the IPv6 address assignment discharging, improved address service efficiency.
As shown in Figure 2, the embodiment of the present invention also provides a kind of method that discharges fast allocation IPv6 address, comprising:
Step 201: mutual IPv6 application IP addresses message and the information in corresponding response message between the dynamic host configuration protocol DHCP v6 client that IPv6 supported in record and DHCPv6 server.
In DHCPv6 client, pass through in the process of fast address method of salary distribution application IPv6 address, between DHCPv6 client and DHCPv6 server, carry out mutual, DHCPv6 client sends IPv6 application IP addresses message to DHCPv6 server, and this IPv6 application IP addresses message is request (solicit) message that carries rapid commit option; DHCPv6 server returns to the response message of IPv6 application IP addresses message, and this response message is response (reply) message that carries rapid commit option.Intermediate equipment is monitored the message of DHCPv6 client and DHCPv6 server interaction, when listening to the response message of IPv6 application IP addresses message and/or IPv6 application IP addresses message, and the information in recorded message, and preserve this information.
Wherein, information in IPv6 application IP addresses message can comprise: the source MAC of message (Media Access Control, medium access control) the sign DUID of address, DHCPv6 client (DHCP Unique Identifier, DHCP unique identifier), the IAID of DHCPv6 client (Identity Association Identifier, identity unique identifier), Transaction-ID (transaction identification code) and message inbound port etc.Information in response message can comprise: the sign DUID of the address of DHCPv6 server, DHCPv6 server and DHCPv6 server are the lease of DHCPv6 client distribution etc., wherein, in lease, include IPv6 address and available lifetime thereof (Valid Lifetime).
In addition, in network, there are a plurality of DHCPv6 servers, DHCPv6 client sends IPv6 application IP addresses message by multicast mode to a plurality of DHCPv6 servers, the DHCPv6 server that receives this IPv6 application IP addresses message all sends the response message of this IPv6 application IP addresses message to DHCPv6 client by mode of unicast, intermediate equipment need be carried out record to all response messages.
Step 202: the lease time section in response message is modified, and amended response message is sent to DHCPv6 client, wherein, amendedly lease the time period and be less than leasing the time period before modification.
DHCPv6 server-assignment has certain leasing the time period to the IPv6 address of DHCPv6 client.Leasing the time period is determined by available lifetime.The time period of leasing of IPv6 address arrives after available lifetime, and DHCPv6 client can not re-use this IPv6 address.Before available lifetime arrives, if DHCPv6 client wishes to continue to use this IPv6 address, need to upgrade IPv6 address lease.Wherein, the time period of leasing that the DHCPv6 server that intermediate equipment listens to returns can be 1 day.
Because DHCPv6 client is at the response message that receives the IPv6 application IP addresses message that a plurality of DHCPv6 servers send, according to the priority of response message or other preset rules, select the entrained IPv6 address of response message of the IPv6 application IP addresses message that one of them DHCPv6 server sends.Therefore the DHCPv6 server identification of selecting in order to obtain as early as possible DHCPv6 client, this is leased to the time period modifies, amendedly lease the time period and be less than leasing the time period before modification, for example 10 seconds, and DHCPv6 client sends renewed treaty message to DHCPv6 server when setting the first Preset Time point, if DHCPv6 client is not received the response message of DHCPv6 server when the first Preset Time point, when setting the second Preset Time point, DHCPv6 client sends to DHCPv6 server the message of again renewing a contract.Wherein, the first Preset Time point can be for leasing half of time period, and the second Preset Time point can be for leasing 4/5 of the time period.
Step 203: receive the renewed treaty message that DHCPv6 client sends, the sign of the DHCPv6 server of choosing according to this DHCPv6 client of this renewed treaty Receive message.
When DHCPv6 client is used the time of leasing of IPv6 address to arrive the first Preset Time point of available lifetime, the DHCPv6 server transmission renewed treaty message that intermediate equipment is chosen to this DHCPv6 client by listening to DHCPv6 client, thus get the sign that this renewed treaty message carries selected DHCPv6 server.
Step 204: the sign of the DHCPv6 server of choosing according to the information of record and this DHCPv6 client of getting, determine not selected DHCPv6 server.
Step 205: notify not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
According to the information of record, determine a plurality of DHCPv6 servers of the response message of the IPv6 application IP addresses message sending to DHCPv6 client.By the DHCPv6 server of having determined that DHCPv6 client is selected, thereby determine not selected DHCPv6 server.By notifying not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed, and shorter owing to taking time of not selected DHCPv6 server, thus address waste problem solved.
Concrete, receive the renewed treaty message that DHCPv6 client sends, the sign of the DHCPv6 server of choosing according to this DHCPv6 client of this renewed treaty Receive message; The sign of the DHCPv6 server of choosing according to the information of record and this DHCPv6 client of getting, determine not selected DHCPv6 server, specifically can carry out in the following ways: the DUID for the DHCPv6 server in the response message of this IPv6 application IP addresses message of record and the DUID of the DHCPv6 server of choosing getting are compared; If not identical, determine that the indicated DHCPv6 server of DUID of the DHCPv6 server of this record is not selected DHCPv6 server; Otherwise the indicated DHCPv6 server of DUID of the DHCPv6 server of this record is exactly the DHCPv6 server of choosing.
After having determined not selected DHCPv6 server, intermediate equipment is passed through mode of unicast, to the not selected DHCPv6 server of determining, send release message, to notify not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
As shown in Figure 3, the embodiment of the present invention provides a kind of equipment 30 that discharges fast allocation IPv6 address, comprising:
Record cell 301, for recording IPv6 application IP addresses message mutual between the dynamic host configuration protocol DHCP v6 client of supporting IPv6 and DHCPv6 server and the information of corresponding response message;
Revise unit 302, modify for the time period of leasing to response message, and amended response message is sent to DHCPv6 client, wherein, amendedly lease the time period and be less than leasing the time period before modification;
Acquiring unit 303, the renewed treaty message sending for receiving DHCPv6 client, the sign of the DHCPv6 server of choosing according to this DHCPv6 client of this renewed treaty Receive message;
Determining unit 304, for the sign of the DHCPv6 server chosen according to the information of record and this DHCPv6 client of getting, determines not selected DHCPv6 server;
Notification unit 305, for notifying not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
Further, the time period of leasing in described amended response message is 10 seconds.
Further, described DHCPv6 server is at least two.
Further, the information in described response message comprises: the sign of DHCPv6 server;
Described determining unit, specifically for comparing the sign for the DHCPv6 server in the response message of this IPv6 application IP addresses message of record and the sign of the DHCPv6 server of choosing getting;
If not identical, determine that the indicated DHCPv6 server of sign of the DHCPv6 server of this record is not selected DHCPv6 server.
Further, described notification unit, specifically for by mode of unicast, sends release message to the not selected DHCPv6 server of determining, to notify not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (10)
1. a method that discharges fast allocation IPv6 address, is characterized in that, comprising:
Mutual IPv6 application IP addresses message and the information in corresponding response message between the dynamic host configuration protocol DHCP v6 client that IPv6 supported in record and DHCPv6 server;
The time period of leasing in response message is modified, and amended response message is sent to DHCPv6 client, wherein, amendedly lease the time period and be less than leasing the time period before modification;
Receive the renewed treaty message that DHCPv6 client sends, the sign of the DHCPv6 server of choosing according to this DHCPv6 client of this renewed treaty Receive message;
The sign of the DHCPv6 server of choosing according to the information of record and this DHCPv6 client of getting, determines not selected DHCPv6 server;
Notify not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
2. method according to claim 1, is characterized in that, the time period of leasing in described amended response message is 10 seconds.
3. method according to claim 1, is characterized in that, described DHCPv6 server is at least two.
4. method according to claim 1, is characterized in that, the information in described response message comprises: the sign of DHCPv6 server;
The sign of the described DHCPv6 server of choosing according to the information of record and this DHCPv6 client of getting, determines not selected DHCPv6 server, specifically comprises:
The sign for the DHCPv6 server in the response message of this IPv6 application IP addresses message of record and the sign of the DHCPv6 server of choosing getting are compared;
If not identical, determine that the indicated DHCPv6 server of sign of the DHCPv6 server of this record is not selected DHCPv6 server.
5. method according to claim 4, is characterized in that, the described IPv6 address of notifying not selected DHCPv6 server to be released to this DHCPv6 client distribution, specifically comprises:
By mode of unicast, to the not selected DHCPv6 server of determining, send release message, to notify not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
6. an equipment that discharges fast allocation IPv6 address, is characterized in that, comprising:
Record cell, for recording IPv6 application IP addresses message mutual between the dynamic host configuration protocol DHCP v6 client of supporting IPv6 and DHCPv6 server and the information of corresponding response message;
Revise unit, modify for the time period of leasing to response message, and amended response message is sent to DHCPv6 client, wherein, amendedly lease the time period and be less than leasing the time period before modification;
Acquiring unit, the renewed treaty message sending for receiving DHCPv6 client, the sign of the DHCPv6 server of choosing according to this DHCPv6 client of this renewed treaty Receive message;
Determining unit, for the sign of the DHCPv6 server chosen according to the information of record and this DHCPv6 client of getting, determines not selected DHCPv6 server;
Notification unit, for notifying not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
7. equipment according to claim 6, is characterized in that, the time period of leasing in described amended response message is 10 seconds.
8. equipment according to claim 6, is characterized in that, described DHCPv6 server is at least two.
9. equipment according to claim 6, is characterized in that, the information in described response message comprises: the sign of DHCPv6 server;
Described determining unit, specifically for comparing the sign for the DHCPv6 server in the response message of this IPv6 application IP addresses message of record and the sign of the DHCPv6 server of choosing getting; If not identical, determine that the indicated DHCPv6 server of sign of the DHCPv6 server of this record is not selected DHCPv6 server.
10. equipment according to claim 9, it is characterized in that, described notification unit, specifically for passing through mode of unicast, to the not selected DHCPv6 server of determining, send release message, to notify not selected DHCPv6 server to be released to the IPv6 address that this DHCPv6 client is distributed.
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| CN201410355634.9A CN104144229B (en) | 2014-07-24 | 2014-07-24 | A kind of method and apparatus for discharging quick distribution IPv6 addresses |
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| CN201410355634.9A CN104144229B (en) | 2014-07-24 | 2014-07-24 | A kind of method and apparatus for discharging quick distribution IPv6 addresses |
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| CN104144229B CN104144229B (en) | 2017-11-14 |
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| US6952428B1 (en) * | 2001-01-26 | 2005-10-04 | 3Com Corporation | System and method for a specialized dynamic host configuration protocol proxy in a data-over-cable network |
| CN102325200A (en) * | 2011-09-22 | 2012-01-18 | 杭州华三通信技术有限公司 | Method for rapidly acquiring IPv6 (Internet Protocol Version 6) address and DHCP (Dynamic Host Configuration Protocol) snooping equipment |
| CN102752414A (en) * | 2012-07-16 | 2012-10-24 | 杭州华三通信技术有限公司 | Method and equipment for releasing Internet protocol (IP)v6 address |
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2014
- 2014-07-24 CN CN201410355634.9A patent/CN104144229B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6952428B1 (en) * | 2001-01-26 | 2005-10-04 | 3Com Corporation | System and method for a specialized dynamic host configuration protocol proxy in a data-over-cable network |
| CN102325200A (en) * | 2011-09-22 | 2012-01-18 | 杭州华三通信技术有限公司 | Method for rapidly acquiring IPv6 (Internet Protocol Version 6) address and DHCP (Dynamic Host Configuration Protocol) snooping equipment |
| CN102752414A (en) * | 2012-07-16 | 2012-10-24 | 杭州华三通信技术有限公司 | Method and equipment for releasing Internet protocol (IP)v6 address |
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