CN102325200A - Method for rapidly acquiring IPv6 (Internet Protocol Version 6) address and DHCP (Dynamic Host Configuration Protocol) snooping equipment - Google Patents
Method for rapidly acquiring IPv6 (Internet Protocol Version 6) address and DHCP (Dynamic Host Configuration Protocol) snooping equipment Download PDFInfo
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Abstract
The invention provides a method for rapidly acquiring an IPv6 (Internet Protocol Version 6) address. The method comprises the following steps that: DHCP (Dynamic Host Configuration Protocol) snooping equipment snoops a reply message which is with a field of rapid commit and transmitted by a server after transmitting a solicit message with a field of rapid commit to a server, and records the address of the server sending the reply message and an IP (Internet Protocol) address assigned for a client terminal; and for the IP address assigned for the client terminal, the DHCP snooping equipment determines that the IP address is not adopted by the client terminal and notifies the server to release the lease of the IP address when the DHCP equipment does not receive a DAD (Duplicate Address Detection) message transmitted by the client terminal. The invention simultaneously discloses the DHCP snooping equipment. By applying the method for rapidly acquiring the IPv6 address and the DHCP snooping equipment provided by the invention, the client terminal is ensured to rapidly acquire the address, and the address waster is also avoided.
Description
Technical field
The present invention relates to DHCP (DHCP) technology, particularly a kind of method and DHCP snooping equipment that obtains Internet Protocol (IP) v6 address fast.
Background technology
Fig. 1 is the existing workflow diagram that obtains the IPv6 address approach, and as shown in Figure 1, this flow process comprises:
Step 101: user end to server sends seeks (solicit) message with request IPv6 address.
In this step, comprise the address style of the IPv6 address that client will ask in the said solicit message, address style has temporary address identity related (IA-TA) and two kinds of non-temporary address identity related (IA-NA).
Step 102: can distribute the server of its needed address style for client and send announcement (Advertise) message to client, said Advertise message is included as the client addresses distributed.
Step 103: after client receives the Advertise message, send the unique identification (DUID) of the server of asking Request message, said Request message to comprise the client selection and the address that provides to server.
Need to prove; After client is sent the solicit message; Can in a period of time, (like 1s) receive the Advertise message, select server (normally to select, if priority is identical according to the priority of server according to the Advertise message; Then use the server of fastest response) after, the Request message of the address that the server of DUID and the selection of the server comprise selection provides sent to server.
Step 104: after the server of selection receives the Request message, return the Reply message of DUID that comprises this server and the address that provides to client.
Further, when client receives the Reply message, the address of using message to provide is disposed voluntarily, the row address collision detection of going forward side by side, after detection was passed through, client just can use this address to carry out subsequent communications.
So far, promptly accomplished the existing whole workflow of obtaining the IPv6 address approach, can find out from above-mentioned flow process, the existing method of obtaining the IPv6 address is not a time-consuming process.Yet; At some in particular cases; Maybe be also need further to reduce time of obtaining to reach the purpose of quick applied address, for example, often move on to the mobile device (like mobile phone) of another link from a link; If all will adopt above-mentioned flow process to obtain the address when moving at every turn, the delay of Advertise message may appear collecting from a plurality of servers.
At present; Mainly submit to (rapid commit) field to solve the problems referred to above fast through in the solicit message, increasing; If client comprises rapid commit field in the solicit message that sends; And server also is configured to respond the solicit message that has this field; When server receives the solicit message that comprises rapid commit field, directly produce Reply message from the address that provides to client that respond DUID that has this server and so, also just solved client and collected the delay that the Advertise message brings from a plurality of servers.
When having a plurality of servers all to be configured to respond the solicit message that has rapid commit field in the network; Because client is selecting do not have announcement server behind the address; Therefore; The waste problem of selected address can occur not having, for this reason, have now normally and solve address waste problem through only disposing a server that can respond rapid commit field.
Yet, unusual if this station server occurs on the one hand when only disposing the server that can respond rapid commit field, also just lost the function of quick applied address; On the other hand; Because server is not forced requirement and must responds the message that has rapid commit field, simultaneously, client is not forced requirement yet must wait for the answer message that has rapid commit field; And; Client normally responds the response message of receiving at first (this message also possibly be the Advertise message), therefore, and when client is received the Advertise message earlier; Not only lose the function of quick applied address, and the waste of the address that server provided of response Rapid commit field can occur disposing.
Fig. 2 uses the networking sketch map for the existing DHCP that is adopted; Use in the networking at DHCP; Dispose DHCP between the client and server and intercepted (Snooping) equipment; Their mutual messages all pass through DHCP Snooping device forwards, that is to say, DHCP Snooping equipment is intercepted all DHCP messages.Wherein, the port arrangement that connects Dynamic Host Configuration Protocol server on this DHCP Snooping equipment is a trusted port, so that DHCP Snooping equipment can normally be transmitted the response message of Dynamic Host Configuration Protocol server, the assurance client can be obtained the IP address from legal server.
Summary of the invention
In view of this, the invention provides a kind of method of obtaining the IPv6 address fast, not only make client can get access to the address fast, and avoided the address waste.
The present invention also provides a kind of DHCP snooping equipment, not only makes client can get access to the address fast, and has avoided the address waste.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of method of obtaining Internet Protocol IPv6 address fast, this method comprises:
The solicit message of seeking that the dynamic host configuration protocol DHCP snooping equipment will have quick submission rapid commit field sends to server; Intercept the answer reply message that has rapid commit field that server sends, and record send the reply message server the address and be the client IP address allocated;
For being the client IP address allocated, when the DHCP snooping equipment does not receive that the address conflict of client transmission detects the DAD message, be judged as this IP address not by customer end adopted, and announcement server discharges the lease of this IP address.
When the DHCP snooping equipment does not receive that the address conflict of client transmission detects the DAD message; This method further comprises: the DHCP snooping equipment sends neighbor request NS message and gives client; And judge whether to receive the response message of client to this NS message; If no, be judged as this IP address not by customer end adopted, and announcement server discharges the lease of this IP address.
The solicit message that said DHCP snooping equipment will have rapid commit field sends to before the server, and this method also comprises:
The DHCP snooping equipment is intercepted the solicit message that has rapid commit field that client is sent, and the MAC Address of the client of record solicit message and the port that receives the DHCP snooping equipment of this solicit message.
When the DHCP snooping equipment received that the address conflict of client transmission detects the DAD message, the DHCP snooping equipment was judged as this IP address by customer end adopted.
When the DHCP snooping equipment is received client to the response message of the NS message of sending, be judged as this IP address by customer end adopted.
This method also comprises:
The DHCP snooping equipment sends to client with the reply message that has rapid commit field that the server that listens to sends.
A kind of dynamic host configuration protocol DHCP snooping equipment, this equipment comprises: transmitting element, second record cell, first judging unit and first notification unit, wherein,
Said transmitting element is used for the solicit message of seeking that has quick submission rapid commit field is sent to server;
Said second record cell; Be used for sending the solicit message to behind the server when transmitting element; Intercept the answer reply message that has rapid commit field that server sends, and record send the reply message server the address and be the client IP address allocated;
Said first judging unit is used for being the client IP address allocated for second record cell, judges whether to receive that the address conflict that client is sent detects the DAD message;
Said first notification unit; Be used for when first judgment unit judges goes out not receive the DAD message of client transmission; Be judged as write down in second record cell for the client IP address allocated not by customer end adopted, and announcement server discharges the lease of this IP address.
This equipment also comprises second judging unit, then,
Said transmitting element also is used for when first judgment unit judges goes out not receive that the address conflict of client transmission detects the DAD message, sends neighbor request NS message and gives client;
Said second judging unit is used to judge whether to receive the response message of client to the NS message of transmitting element transmission;
Said first notification unit; Also be used for when second judgment unit judges goes out not receive the response message of the NS message that client is sent out transmitting element; Be judged as write down in second record cell for the client IP address allocated not by customer end adopted, and announcement server discharges the lease of this IP address.
This equipment also comprises first record cell, is used to intercept the solicit message that has rapid commit field that client is sent, and the MAC Address of the client of record solicit message and the port that receives the DHCP snooping equipment of this solicit message;
Then, said transmitting element is used for the solicit message that has rapid commit field that first record cell listens to is sent to server.
This equipment also comprises second notification unit, is used for when first judgment unit judges goes out to receive the DAD message of client transmission, being judged as this IP address by customer end adopted.
This equipment also comprises second notification unit, is used for when second judgment unit judges goes out to receive the response message of the NS message that client sends transmitting element, being judged as this IP address by customer end adopted.
Said transmitting element, the reply message that has the rapidcommit field that the server that is used for that also second record cell is listened to sends sends to client.
In sum; The method of obtaining the IPv6 address fast that the present invention adopted and DHCP snooping equipment; Be through carrying out record for the client IP address allocated in the reply message that server is sent to client by the DHCP snooping equipment; Thereby when the DHCP snooping equipment is not received the DAD message of client transmission; Can send NS message to client to the IP address of record, and then whether this NS message responded according to client and whether to be determined this IP address by customer end adopted.Because the message that client of the present invention and server remain through having rapid commit field carries out mutual; Therefore, can guarantee that client gets access to the address fast, and; Can all carry out whether adopted processing to each IP address; Therefore, can be applicable to that a plurality of servers all are configured to respond the situation of rapid commit field, and effectively avoid the waste of address.
Description of drawings
Fig. 1 is the existing workflow diagram that obtains the IPv6 address approach;
Fig. 2 uses the networking sketch map for the existing DHCP that is adopted;
Fig. 3 obtains the workflow diagram of IPv6 address approach fast for the present invention;
Fig. 4 is the structural representation of the DHCP snooping equipment that the present invention adopted.
Embodiment
In order to solve the technical problem that the present invention proposes, the concrete realization of scheme according to the invention comprises:
After the solicit message that the DHCP snooping equipment will have a rapid commit field sends to server; Intercept the reply message that has rapid commit field that server sends, and record send the reply message server the address and be the client IP address allocated; For being the client IP address allocated; When the DHCP snooping equipment is not received the DAD message of client transmission; The DHCP snooping equipment sends NS message and gives client, and judges whether to receive the response message of client to this NS message, if do not have; Then be judged as this IP address not by customer end adopted, and announcement server discharges the lease of this IP address.
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing and specific embodiment that the present invention is done to describe in detail further below.
Fig. 3 obtains the workflow diagram of IPv6 address approach fast for the present invention.As shown in Figure 3, this flow process comprises:
Step 301:DHCP snooping equipment listens to that client sends when having the solicit message of rapid commit field, the information in record solicit message source and the solicit message.
In this step, the information in said solicit message source and the solicit message is specially: the DUID of the source MAC of solicit message (MAC Address of client), the port that receives the DHCP snooping equipment of this solicit message, client and related address style (for IA-TA or IA-NA).
Step 302:DHCP snooping equipment sends to server with the solicit message that listens to.
After step 303:DHCP snooping equipment sends to server with the solicit message, intercept the reply message that has rapid commit field that server sends, and write down the source of this reply message and the information in this reply message.
In this step, the information in the source of said reply message and the reply message comprise the server that sends the reply message address, server DUID and be the client IP address allocated.
Step 304:DHCP snooping equipment sends to client with the reply message that listens to.
Step 305:DHCP snooping equipment judges whether to receive that the address conflict that client is sent detects (DAD) message, if, execution in step 309; Otherwise, execution in step 306 (carrying out this step is a preferred embodiment of the present invention) or 308.
Step 306: to the IP address of server-assignment in the reply message of not receiving the DAD message, the DHCP snooping equipment sends neighbor request (NS) message and gives client.
Need to prove; This step is a preferred embodiment; And the IP address in this step is for the Servers-all IP address allocated of not receiving the DAD message, has just guaranteed that also can carry out availability to all IP addresses detects, and has avoided the problem of IP address waste.
What also need explain is, in this step, when client is sent NS message, can send according to the port of the DHCP snooping equipment of the reception solicit message of record in the step 301, thereby can realize that clean culture sends, and avoids the waste of network traffics.
Step 307:DHCP snooping equipment judges whether to receive the response message of client for NS message, if, execution in step 309; Otherwise, execution in step 308.
Step 308: for IP address of not receiving the DAD message that client is sent and the IP address of not receiving the response message of NS message; The DHCP snooping equipment all is judged as this IP address not by customer end adopted, and announcement server discharges the lease of this IP address.
Need to prove that in this step, being judged as this IP address for the IP address of not receiving the DAD message that client is sent is not one embodiment of the present of invention by customer end adopted; Further, for the IP address of not receiving the DAD message that client is sent, when further judging the response message of not receiving NS message, being judged as this IP address is not an alternative embodiment of the invention by customer end adopted.
When the IP address not by customer end adopted, server can discharge the lease of this IP address.
Step 309: for IP address of receiving the DAD message and the IP address of receiving the response message of NS message, the DHCP snooping equipment is judged to be this IP address customer end adopted.
So far, promptly accomplished the whole workflow that the present invention obtains the IPv6 address approach fast.
Based on said method, Fig. 4 has provided the structure of the DHCP snooping equipment that the present invention adopted.As shown in Figure 4, this equipment comprises transmitting element 43, second record cell 42, first judging unit 44 and first notification unit 46, wherein,
Said transmitting element 43 is used for the solicit message that has rapid commit field is sent to server.
Further; When this equipment comprises second judging unit 45; Said transmitting element 43 also is used for when first judging unit 44 is judged the DAD message of not receiving the client transmission, sending NS message and giving client; Said second judging unit 45 is used to judge whether to receive the response message of client to the NS message of transmitting element 43 transmissions.
Further, said transmitting element 43, the reply message that has rapid commit field that the server that is used for that also second record cell 42 is listened to sends sends to client.
Said second record cell 42; Be used for sending the solicit message to behind the server when transmitting element 43; Intercept the reply message that has rapid commit field that server sends, and record send the reply message server the address and be the client IP address allocated.
Said first judging unit 44 is used for being the client IP address allocated for second record cell 42, judges whether the DAD message of receiving that client is sent.
Said first notification unit 46; Be used for when first judging unit 44 is judged the DAD message of not receiving the client transmission; Be judged as in second record cell 42 record for the client IP address allocated not by customer end adopted, and announcement server is released to the lease of this IP address that client distributes.
Further; When this equipment comprises second judging unit 45; Said first notification unit 46; Also be used for when second judging unit 45 is judged the response message of the NS message of receiving that not client is sent out transmitting element, be judged as record in second record cell 42 for the client IP address allocated not by customer end adopted, and announcement server is released to the lease of this IP address that client distributes
This equipment also comprises first record cell 41, is used to intercept the solicit message that has rapid commit field that client is sent, and the MAC Address of the client of record solicit message and the port that receives the DHCP snooping equipment of this solicit message;
Then, said transmitting element is used for the solicit message that has rapid commit field that first record cell 41 listens to is sent to server.
Further; This equipment also comprises second notification unit 47; Be used for judging when receiving the DAD message that client sends when first judging unit 44, be judged as this IP address by customer end adopted and; Be used for when second judging unit 45 is judged the response message that receives the NS message that server sends transmitting element, being judged as this IP address by customer end adopted.
So far, promptly obtained the DHCP snooping equipment that the present invention adopted.The concrete workflow of the said DHCP snooping equipment of Fig. 4 can repeat no more referring to Fig. 3 here.
In a word; The method of obtaining the IPv6 address fast that the present invention adopted and DHCP snooping equipment; Through carrying out record for the client IP address allocated in the reply message that server is sent to client by the DHCP snooping equipment, thereby when the DHCP snooping equipment is not received the DAD message that client sends, can be to the IP address of record; Send NS message to client, and then whether this NS message is responded according to client and whether to be determined this IP address by customer end adopted.Because the message that client of the present invention and server remain through having rapid commit field carries out mutual; Therefore, can guarantee that client gets access to the address fast, and; Can all carry out whether adopted processing to each IP address; Therefore, can be applicable to that a plurality of servers all are configured to respond the situation of rapid commit field, and effectively avoid the waste of address.
Further; Since in the DHCP snooping equipment, write down the MAC Address of client and the port of the solicit message that receives this client transmission, therefore, when client is sent NS message; Can designated port and MAC Address carry out clean culture and send, thereby can not increase too much network traffics; In addition, the DHCP snooping equipment has also write down the address of the server of distributing IP address, and then can realize that also client clean culture announcement server discharges lease, can not increase too much network traffics yet.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (12)
1. a method of obtaining Internet Protocol IPv6 address fast is characterized in that, this method comprises:
The solicit message of seeking that the dynamic host configuration protocol DHCP snooping equipment will have quick submission rapid commit field sends to server; Intercept the answer reply message that has rapid commit field that server sends, and record send the reply message server the address and be the client IP address allocated;
For being the client IP address allocated, when the DHCP snooping equipment does not receive that the address conflict of client transmission detects the DAD message, be judged as this IP address not by customer end adopted, and announcement server discharges the lease of this IP address.
2. method according to claim 1; It is characterized in that when the DHCP snooping equipment did not receive that the address conflict of client transmission detects the DAD message, this method further comprised: the DHCP snooping equipment sends neighbor request NS message and gives client; And judge whether to receive the response message of client to this NS message; If no, be judged as this IP address not by customer end adopted, and announcement server discharges the lease of this IP address.
3. method according to claim 1 and 2 is characterized in that, the solicit message that said DHCP snooping equipment will have rapid commit field sends to before the server, and this method also comprises:
The DHCP snooping equipment is intercepted the solicit message that has rapid commit field that client is sent, and the MAC Address of the client of record solicit message and the port that receives the DHCP snooping equipment of this solicit message.
4. method according to claim 1 and 2 is characterized in that, when the DHCP snooping equipment received that the address conflict of client transmission detects the DAD message, the DHCP snooping equipment was judged as this IP address by customer end adopted.
5. method according to claim 2 is characterized in that, when the DHCP snooping equipment is received client to the response message of the NS message of sending, is judged as this IP address by customer end adopted.
6. method according to claim 1 and 2 is characterized in that, this method also comprises:
The DHCP snooping equipment sends to client with the reply message that has rapid commit field that the server that listens to sends.
7. a dynamic host configuration protocol DHCP snooping equipment is characterized in that, this equipment comprises: transmitting element, second record cell, first judging unit and first notification unit, wherein,
Said transmitting element is used for the solicit message of seeking that has quick submission rapid commit field is sent to server;
Said second record cell; Be used for sending the solicit message to behind the server when transmitting element; Intercept the answer reply message that has rapid commit field that server sends, and record send the reply message server the address and be the client IP address allocated;
Said first judging unit is used for being the client IP address allocated for second record cell, judges whether to receive that the address conflict that client is sent detects the DAD message;
Said first notification unit; Be used for when first judgment unit judges goes out not receive the DAD message of client transmission; Be judged as write down in second record cell for the client IP address allocated not by customer end adopted, and announcement server discharges the lease of this IP address.
8. equipment according to claim 7 is characterized in that this equipment also comprises second judging unit, then,
Said transmitting element also is used for when first judgment unit judges goes out not receive that the address conflict of client transmission detects the DAD message, sends neighbor request NS message and gives client;
Said second judging unit is used to judge whether to receive the response message of client to the NS message of transmitting element transmission;
Said first notification unit; Also be used for when second judgment unit judges goes out not receive the response message of the NS message that client is sent out transmitting element; Be judged as write down in second record cell for the client IP address allocated not by customer end adopted, and announcement server discharges the lease of this IP address.
9. according to claim 7 or 8 described equipment; It is characterized in that; This equipment also comprises first record cell; Be used to intercept the solicit message that has rapid commit field that client is sent, and the MAC Address of the client of record solicit message and the port that receives the DHCP snooping equipment of this solicit message;
Then, said transmitting element is used for the solicit message that has rapid commit field that first record cell listens to is sent to server.
10. according to claim 7 or 8 described equipment, it is characterized in that this equipment also comprises second notification unit, be used for when first judgment unit judges goes out to receive the DAD message of client transmission, being judged as this IP address by customer end adopted.
11. equipment according to claim 8; It is characterized in that; This equipment also comprises second notification unit, is used for when second judgment unit judges goes out to receive the response message of the NS message that client sends transmitting element, being judged as this IP address by customer end adopted.
12. according to claim 7 or 8 described equipment, it is characterized in that, said transmitting element, the reply message that has rapid commit field that the server that is used for that also second record cell is listened to sends sends to client.
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| CN201110284177A CN102325200A (en) | 2011-09-22 | 2011-09-22 | Method for rapidly acquiring IPv6 (Internet Protocol Version 6) address and DHCP (Dynamic Host Configuration Protocol) snooping equipment |
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| CN201110284177A CN102325200A (en) | 2011-09-22 | 2011-09-22 | Method for rapidly acquiring IPv6 (Internet Protocol Version 6) address and DHCP (Dynamic Host Configuration Protocol) snooping equipment |
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| CN104410727B (en) * | 2014-11-20 | 2018-03-23 | 中国联合网络通信集团有限公司 | Address distribution method, client, server and address allocation system |
| CN107770070A (en) * | 2016-08-17 | 2018-03-06 | 中兴通讯股份有限公司 | A kind of method, apparatus and system of information transfer |
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| CN111787130A (en) * | 2020-05-28 | 2020-10-16 | 武汉思普崚技术有限公司 | IPv6 address and prefix distribution method, device and computer readable storage medium |
| CN115865800A (en) * | 2022-11-24 | 2023-03-28 | 深圳创维数字技术有限公司 | IPv6 address obtaining method and device and storage medium |
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Application publication date: 20120118 |