CN1761262A - Distributed approach and system based on virtual interface under dynamic host configuration protocol - Google Patents
Distributed approach and system based on virtual interface under dynamic host configuration protocol Download PDFInfo
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- CN1761262A CN1761262A CN 200510086634 CN200510086634A CN1761262A CN 1761262 A CN1761262 A CN 1761262A CN 200510086634 CN200510086634 CN 200510086634 CN 200510086634 A CN200510086634 A CN 200510086634A CN 1761262 A CN1761262 A CN 1761262A
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Abstract
The invention is in use among users, relays and external servers of supporting dynamic host configuration protocol (DHCP). Characters are that all interactive data packets in DHCP between users and external server of not supporting number 82 option are passed through relays located at application layer. Through user's access circuit number embedded in the interactive data packets, the relay makes response data packet without 82 option returned from external servers transfer to the user, who launches request in DHCP.
Description
Technical field
The DynamicHost configuration association that the present invention relates in the communication field changes the field, particularly relate to the relaying that in ethernet environment, uses DHCP and carry out IP address dynamic assignment, and dynamically obtain the method and system of IP address for the user by external server as the user.
Background technology
Development along with broadband network technology, broadband access network device emerge in multitudes such as Radio Access Controller (AC), BAS Broadband Access Server (AS), broadband access router, these broadband network access devices provide the function of being distributed dynamic IP addressing by DHCP relay (Dynamic Host Configuration Protocol DHCP) by outside DHCP SERVER (Dynamic Host Configuration Protocol server) for inner DHCP CLIENT (DHCP client) mostly.
At present, in high performance distributed broadband access network device, in order to support large user's amount of DHCP CLIENT, require the distributed treatment of DHCP relay realization based on virtual interface, the real interface of the pairing a plurality of physics of logic virtual interface of promptly externally regarding a three layers of IP interface as is positioned on the different distributed ply-yarn drills, to improve system capability and data processing throughput.But concerning distributed DHCP relay, the response data packet that will be referred to how DHCP SERVER to be returned correctly is distributed to the DHCP user of the network interface that is positioned at different distributions formula ply-yarn drill.In order to realize this purpose, the RFC of DHCP agreement (Requestfor Comments, Request for Comment) defines No. 82 options in the text and realized this purpose, by using 82 options, DHCP relay number is recorded in DHCP user's place in circuit wherein, when outside DHCPSERVER when DHCP relay returns response data packet, to carry No. 82 same option parameter in packet, DHCP relay can extract user's place in circuit of oneself before having inserted number from the dhcp response packet after receiving response data packet like this.And correct response data packet is forwarded to is positioned at DHCP user correct on the distinct interface.Concerning supporting that there is not any problem in such processing, is to support DHCP relay to realize the basis based on the virtual interface distributed treatment yet at the outside DHCPSERVER of No. 82 options of DHCP relay.
But the situation of reality is that the most of DHCP SERVER that use do not support the processing to No. 82 options at present.When these DHCP SERVER as the distributed broadband access network device during the outside DHCP SERVER of resident DHCP relay, to the DHCP request data package of receiving from DHCP relay of carrying 82 options, can't in the dhcp response packet that it returns, carry No. 82 option.Like this, after DHCP relay is received the response data packet that outside DHCP SERVER returns, can't extract user's place in circuit of oneself before having inserted number, and also just the dhcp response packet correctly can't be returned to certainly and initiate the DHCP requesting users.At present, existing DHCP relay can not correctly be worked to this outside DHCP SERVER of 82 options that do not support.
Therefore, when outside DHCP SERVER does not support under the situation of No. 82 options, how correctly to finish the distributed processing power of DHCP relay, and with outside DHCP SERVER return correctly not return with give initiating the DHCP requesting users with the response data packet of 82 options be the problem that awaits solving.
The related data document that " DHCP relay is based on the distributed approach of virtual interface " quoted is as follows:
《RFC1533?DHCP?Options?and?BOOTP?Vendor?Extensions》IETF?NetworkWorking?Group
《RFC1534?Interoperation?Between?DHCP?and?BOOTP》IETF?NetworkWorking?Group
《RFC2131?Dynamic?Host?Configuration?Protocol》IETF?NetworkWorking?Group
《RFC2132?DHCP?Options?and?BOOTP?Vendor?Extensions》IETF?NetworkWorking?Group
《RFC3046?DHCP?Relay?Agent?Information?Option》IETF?NetworkWorking?Group
" broadband access equipment is to DHCP relay user's control and management method " patent No. 200310116094.0
Summary of the invention
Technical problem to be solved by this invention provides distributed approach and the system of a kind of DHCP based on virtual interface, solution prior art externally Dynamic Host Configuration Protocol server is not supported under the situation of No. 82 options, can not correctly finish the technical problem of the distributed processing power of DHCP relay.
For achieving the above object, the invention provides the distributed approach of a kind of DHCP based on virtual interface, be used to support the user of DHCP, between relaying and the external server, its characteristics are, the interaction data bag that makes described user and do not support all DHCP between the described external server of No. 82 options is all by being positioned at the described relaying of application layer, the place in circuit of described relaying by in described interaction data bag, embedding described user number, thus make that described external server returns correctly do not return to the user who initiates dhcp request with the response data packet of No. 82 options.
Above-mentioned method, its characteristics are, further comprise the steps: step 1, by revising the server related protocol data field in the described interaction data bag and acting on behalf of the related protocol data field, reach transparent deception, make all interaction data bags between described user and the described external server all by being positioned at the described relaying of application layer to described user and described server; Step 2 after described relaying receives the request data package of described Client-initiated DHCP, is preserved the original value of the option parameter in the option field that all exists in the described request packet; Step 3, thus the described option field of described relaying change described request packet embeds described user's place in circuit number, and request data package after changing is forwarded to described server; Step 4, after described relaying receives the response data packet that described server returns, reduce option field in the described respond packet according to the original value of described option parameter, and, the response data packet after the reduction is transmitted to corresponding user according to the user's place in circuit that from described response data packet, extracts number.
Above-mentioned method, its characteristics are, in the described step 2, the original value of the parameter that saves options comprises: described relaying is created user data area, the original value of described option parameter is saved in the described data field, and sets up the quick indexing of described data field according to the user ID in the described request packet.
Above-mentioned method, its characteristics are, in the described step 2, also comprise and judge whether the interaction data bag is the step of request data package, be then to handle according to request data package, otherwise locate described data field according to user ID in the described interaction data bag and described quick indexing, thereby make same user's the interaction protocol parameter of all follow-up interaction data bags be consistent.
Above-mentioned method, its characteristics are that described step 3 also comprises: after the described option field of described relaying change described request packet, set up the new structure quick indexing of described data field according to the user ID in the described request data package after changing.
Above-mentioned method, its characteristics are that in the described step 4, described relaying is located described data field according to user ID in the described response data packet and described new structure quick indexing, thereby find the original value of corresponding described option parameter.
Above-mentioned method, its characteristics are, also comprise: if described relaying can not navigate to described data field according to user ID in the described response data packet and described new structure quick indexing, then abandon described response data packet.
In order better to realize purpose of the present invention, the present invention also provides the distributed processing system(DPS) of a kind of DHCP based on virtual interface, comprise: the user who supports DHCP, relaying and external server, its characteristics are, described user and the interaction data bag of not supporting all DHCP between the described external server of No. 82 options are all by being positioned at the described relaying of application layer, the place in circuit of described relaying by in described interaction data bag, embedding described user number, thus make that described external server returns correctly do not return to the user who initiates dhcp request with the response data packet of No. 82 options.
Above-mentioned system, its characteristics are, described relaying is provided with user data area, in order to preserving the original value of the option parameter in the option field that all exists in the described request packet, thereby and described relaying by changing the place in circuit number that described option field embeds described user.
Above-mentioned system, its characteristics are that described relaying has the quick indexing of the described data field of setting up according to the user ID in the described request packet, is used for described interaction data bag and navigates to described data field fast; Also have the new structure quick indexing of setting up according to the user ID in the request data package after changing, be used for described response data packet is navigated to described data field fast.
Technique effect of the present invention is:
DHCP relay among the present invention is in the reciprocal process of DHCP user and DHCP SERVER, each DHCP protocol data bag must with the protocol data territory in embed DHCP user's place in circuit number pellucidly, thereby solution is worked as outside DHCP SERVER and is not supported under the situation of No. 82 options, correctly finish the distributed processing power based on virtual interface of DHCP relay, and correctly not returning to the response data packet of 82 options of returning of outside DHCP SERVER initiated the DHCP requesting users.
By using the ZXR10 series Radio Access Controller (AC) of DHCP relay, after implementing the inventive method in the broadband access network devices such as broadband access router, can solve the realization of DHCP relay protocol function and the realization of distributed processing power, can improve the scope of application of the compatibility/expansion DHCP of DHCP relay/and improve the performance of the network equipment, particularly used under the situation of the DHCP SERVER that does not support 82 options the user, the user need not carry out the replacing of DHCP SERVER and reconfigure, dynamic address management be can implement immediately, overlapping investment and management/maintenance cost saved DHCP SERVER by DHCP relay.
Description of drawings
Fig. 1 is the block diagram of the inventive method;
Fig. 2 is application network figure of the present invention;
Fig. 3 is that the present invention handles sequential chart.
Embodiment
The present invention is according to the needs of DHCP relay protocol processes and the needs of distributed treatment, by implementing disclosed Chinese invention patent " broadband access equipment is to the control method of the trunk subscriber of DHCP " (application number 200310116094, open day 2004.12.22), when making the DHCP SERVER that do not support No. 82 options when use as the outside DHCP SERVER of DHCP relay, all the DHCP protocol interaction packets between DHCPCLIENT and the outside DHCP SERVER are all by being positioned at the DHCP relay of application layer.Make that the DHCP relay among the present invention can be effectively in the reciprocal process of DHCP user and DHCPSERVER, each DHCP protocol data bag must with the protocol data territory in embed DHCP user's place in circuit number pellucidly.Thereby solution is worked as outside DHCP SERVER and is not supported under the situation of No. 82 options, correctly finish the distributed processing power based on virtual interface of DHCP relay, and only really not returning to the response data packet of 82 options of returning of outside DHCP SERVER initiated the DHCP requesting users.
Fig. 1 is the block diagram of the inventive method; Core procedure of the present invention comprises:
The core concept of " DHCP relay is based on the distributed approach of virtual interface " of the present invention is:
By processing as above, when making the DHCP SERVER that do not support No. 82 options when the DHCP relay use as its outside DHCP SERVER, DHCP relay can be effectively in the reciprocal process of DHCP user and DHCP SERVER, each DHCP protocol data bag must with the protocol data territory in embed DHCP user's place in circuit number pellucidly.Thereby solution is worked as outside DHCP SERVER and is not supported under the situation of No. 82 options, correctly finish the distributed processing power based on virtual interface of DHCP relay, and correctly not returning to the response data packet of 82 options of returning of outside DHCPSERVER initiated the DHCP requesting users.
The following step of in the ZXR10 series router, implementing " DHCP relay is based on the distributed approach of virtual interface " of having described.In network, placed needing the DHCP SERVER of distributing IP address service.Require the network user to use outside DHCP SERVER to carry out obtaining automatically of network configuration attributes such as IP address.Therefore, in order to realize that by outside DHCP SERVER be the user's dynamic assignment IP address that is positioned at user side, and, when exploitation DHCP RELAY (relaying) module, used this inventive method as required to carrying out control and management alternately between DHCP CLIENT and the DHCP SERVER.Application network figure of the present invention as shown in Figure 2.
Two ZXR10 router devices have been used among Fig. 2, be respectively router two 01 and router two 02, router two 01 uses as DHCP relay simultaneously, and the user who is respectively network 210 and network 220 finishes the access to DHCP user to outside DHCP SERVER application IP address; Router two 02 uses as the INTERNET couple in router, also can serve as outside DHCP SERVER simultaneously and use.In addition, also used two PC (PC) 231,232 in the network, come to concentrate the distributing IP address for the network user as DHCP SERVER.Wherein, a PC 231 is WINDOWS 2000 server platforms, uses the DHCP SERVER that carries, and does not support 82 options, and a PC 232 is the LINUX platform, uses the DHCP SERVER that carries, and supports 82 options.For the treatment step of the software of simplifying description " DHCP relay is based on the distributed approach of virtual interface ", special with the interaction process flow process between the computer in the network among Fig. 2 210 211 (DHCP CLIENT), router two 01, DHCP SERVER (the coupled ROUTER equipment of other DHCP CLIENT is identical with mutual control procedure between outside DHCP SERVER) as an example.
Fig. 3 is that the present invention handles sequential chart, and in conjunction with Fig. 3, the present invention's " DHCP relay is based on the distributed approach of virtual interface " is applied to support that its treatment step is as follows between user 310, relaying 320 and the external server 330 of DHCP:
1) " broadband access equipment is to DHCP relay user's control and management method " described transparent deception measures of enforcement number of patent application 200310116094, make all DHCP exchange data packets between DHCP CLIENT and the outside DHCPSERVER all by being positioned at the DHCP relay of application layer, be convenient to DHCP relay the dynamic IP addressing application process between DHCP CLIENT and the outside DHCP SERVER is implemented control.
2) when DHCP relay receives DHCP Client-initiated DHCP request, extract the quick consumer positioning of the user totem information data field in the DHCP request data package.If do not navigate to corresponding D HCP user data area, illustrate that DHCP user initiates the DHCP request first, then enters the operation of step 3).Otherwise enter the operation of step 7).
3) if DHCP relay receives is DHCP Client-initiated DHCPDISCOVER or DHCPREQUEST request package, create the DHCP user data area, use user totem information in the DHCP request data package to set up the quick indexing of user data area.
4) simultaneously, because DHCP relay need change the parameters such as user totem information in the network side DHCP request data package, so need the user totem information of the network side DHCP of the new structure of use to set up the quick indexing of user data area.
5) parameter information of preserving the user-dependent raw information of DHCP and need change in the DHCP user data area makes this DHCP user's the mutual protocol parameter of all follow-up DHCP be consistent.
6) the DHCP request data package is handled accordingly, DHCP user's place in circuit information etc. being recorded in the DHCP request, and be forwarded to outside DHCP SERVER;
7) user data area that navigates to according to the user totem information that uses in the DHCP request data package of DHCP relay.Carry out the processing of corresponding protocol parameter, and DHCP user's place in circuit information is recorded in the DHCP request, and be forwarded to outside DHCP SERVER;
8) after DHCP relay receives the dhcp response that DHCP SERVER returns, from the DHCP packet, extract the identification information location DHCP user data area of DHCP structure.If do not navigate to corresponding user data area, abandon this DHCP packet, no longer handle.
9) according to the initial parameter of preserving in the user's place in circuit information from the DHCP bag, extracted and the DHCP user data area.Carry out the processing of corresponding protocol parameter, and the DHCVP response data packet is transmitted to the DHCP user who is positioned at different places in circuit.
The above is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention; Every according to equivalence variation and modification that the present invention did, all contained by claim of the present invention.
Claims (10)
1, a kind of DHCP is based on the distributed approach of virtual interface, be used to support the user of DHCP, between relaying and the external server, it is characterized in that, the interaction data bag that makes described user and do not support all DHCP between the described external server of No. 82 options is all by being positioned at the described relaying of application layer, the place in circuit of described relaying by in described interaction data bag, embedding described user number, thus make that described external server returns correctly do not return to the user who initiates dhcp request with the response data packet of No. 82 options.
2, method according to claim 1 is characterized in that, further comprises the steps:
Step 1, by revising the server related protocol data field in the described interaction data bag and acting on behalf of the related protocol data field, reach transparent deception, make all interaction data bags between described user and the described external server all by being positioned at the described relaying of application layer to described user and described server;
Step 2 after described relaying receives the request data package of described Client-initiated DHCP, is preserved the original value of the option parameter in the option field that all exists in the described request packet;
Step 3, thus the described option field of described relaying change described request packet embeds described user's place in circuit number, and request data package after changing is forwarded to described server;
Step 4, after described relaying receives the response data packet that described server returns, reduce option field in the described respond packet according to the original value of described option parameter, and, the response data packet after the reduction is transmitted to corresponding user according to the user's place in circuit that from described response data packet, extracts number.
3, method according to claim 2, it is characterized in that, in the described step 2, the original value of the parameter that saves options comprises: described relaying is created user data area, the original value of described option parameter is saved in the described data field, and sets up the quick indexing of described data field according to the user ID in the described request packet.
4, method according to claim 3, it is characterized in that, in the described step 2, also comprise and judge whether the interaction data bag is the step of request data package, be then to handle according to request data package, otherwise locate described data field according to user ID in the described interaction data bag and described quick indexing, thereby make same user's the interaction protocol parameter of all follow-up interaction data bags be consistent.
5, method according to claim 4, it is characterized in that, described step 3 also comprises: after the described option field of described relaying change described request packet, set up the new structure quick indexing of described data field according to the user ID in the described request data package after changing.
6, method according to claim 5, it is characterized in that, in the described step 4, described relaying is located described data field according to user ID in the described response data packet and described new structure quick indexing, thereby finds the original value of corresponding described option parameter.
7, method according to claim 6 is characterized in that, also comprises: if described relaying can not navigate to described data field according to user ID in the described response data packet and described new structure quick indexing, then abandon described response data packet.
8, a kind of DHCP comprises based on the distributed processing system(DPS) of virtual interface: support user, relaying and the external server of DHCP, it is characterized in that,
Described user and the interaction data bag of not supporting all DHCP between the described external server of No. 82 options are all by being positioned at the described relaying of application layer, the place in circuit of described relaying by in described interaction data bag, embedding described user number, thus make that described external server returns correctly do not return to the user who initiates dhcp request with the response data packet of No. 82 options.
9, system according to claim 8, it is characterized in that, described relaying is provided with user data area, in order to preserving the original value of the option parameter in the option field that all exists in the described request packet, thereby and described relaying by changing the place in circuit number that described option field embeds described user.
10, system according to claim 9 is characterized in that, described relaying has the quick indexing of the described data field of setting up according to the user ID in the described request packet, is used for described interaction data bag and navigates to described data field fast; Also have the new structure quick indexing of setting up according to the user ID in the request data package after changing, be used for described response data packet is navigated to described data field fast.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103297562A (en) * | 2013-05-31 | 2013-09-11 | 深圳市共进电子股份有限公司 | Method, equipment and system for realizing Option82 processing based on kernel |
| CN104660446A (en) * | 2015-01-29 | 2015-05-27 | 烽火通信科技股份有限公司 | DHCP relay implementation system and method in N: 1 protection scenario |
-
2005
- 2005-10-17 CN CNB2005100866344A patent/CN100518196C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103297562A (en) * | 2013-05-31 | 2013-09-11 | 深圳市共进电子股份有限公司 | Method, equipment and system for realizing Option82 processing based on kernel |
| CN104660446A (en) * | 2015-01-29 | 2015-05-27 | 烽火通信科技股份有限公司 | DHCP relay implementation system and method in N: 1 protection scenario |
| CN104660446B (en) * | 2015-01-29 | 2018-02-16 | 烽火通信科技股份有限公司 | N:DHCP relay realizes system and method under 1 protection scene |
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| Publication number | Publication date |
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| CN100518196C (en) | 2009-07-22 |
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