CN101257427A - Layer three switch processing method and apparatus - Google Patents
Layer three switch processing method and apparatus Download PDFInfo
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- CN101257427A CN101257427A CNA2008100824129A CN200810082412A CN101257427A CN 101257427 A CN101257427 A CN 101257427A CN A2008100824129 A CNA2008100824129 A CN A2008100824129A CN 200810082412 A CN200810082412 A CN 200810082412A CN 101257427 A CN101257427 A CN 101257427A
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Abstract
The embodiment of the invention provides a processing method, a terminal and a destination service node for 3-layer switching. The method includes: sending information producing or requiring 3-layer switching towards the network side; allowing the network side informing or assisting 3-layer switching. The embodiment of the invention also provides the terminal and the destination service node, reduces time delay of the 3-layer switching and wireless wattless flow rate, accelerates the process of the terminal determining the 3-layer switching. Therefore, interrupt time delay of the services is greatly reduced, the network performance and the service quality are improved.
Description
The application is to application number 200610104036.X, and the applying date is on July 31st, 2006, and name is called dividing an application that the application documents of " layer three switching processing method and system thereof " do.
Technical field
The present invention relates to a kind of communication means and system thereof, particularly relate to a kind of layer of three switching processing method and system thereof.
Background technology
Be the demand to IP address of reply because of the develop rapidly sharp increase of mobile and broadband technology, IETF has proposed Next Generation Internet agreement-IPv6 in the nineties in 20th century.The most essential improvement of IPv6 is that the address size with former IPv4 is increased to 128 by 32, thereby has brought almost unlimited IP address space.In addition, IPv6 also adopts many technology such as the automatic configuration of host address stateless.
Comprise three functional entitys in the mobile IP v 6: mobile node (MN, Mobile Node, or title terminal), home agent (HA, Home Agent) and interdependent node (CN, Correspondent Node).In the mobility IPv6 of terminal access procedure, the mobile node MN that is in field network have home address (HoA, Home Address) and Care-of Address (CoA, Care-ofAddress).Mobile node MN is registered to home agent HA by Binding Update (BU, Binding Update) process, and home agent HA is handled request, and safeguards the mapping table of a HoA and CoA.After this, home agent HA mails to the packet of the home address HoA of mobile node MN in the home network intercepting, and is forwarded to the Care-of Address CoA of mobile node by the tunnel.The data that mobile node MN is sent also need send via reverse tunnel.MIPv6 has also defined route optimization process in addition, makes CN be dealt into the packet of MN, can be through the forwarding of HA.
For the mobility IPv6 access of support terminal, Internet engineering duty group (IETF, InternetEngineering Task Force) has defined for the mobility of IPv6 and has supported RFC3775 and relevant safety standard RFC3776.Concerning mobile IP v 6, it mainly is for detecting the mobility of L3 (layer three, i.e. IP layer) that its mobility detects.In above-mentioned RFC 3775 standards, whether the router that mobile node MN is normally determined current service by the unreachable detection of adjacent area service node also two-way reaching.If unreachable, mobile node MN is sought the router (default router) of a new couple in router (AR, Access Router also are service node) as its current service, and this process is exactly that the process that L3 switches once takes place.
When mobile node MN detects L3 and switches, the host address stateless of IPv6 disposes prefix (Prefix) information of the network segment that needs the required configuration of acquisition automatically, such as when terminal needs automatic configure host address, need at first to receive the routing broadcast message (RA) of the AR that makes a fresh start, generate new Care-of Address CoA according to this message.Consult Fig. 1, in this process, switch, need to finish according to the following steps on the prior art mobile node MN is concrete for finishing L3:
101, the L3 switching taking place maybe needs to take place the L3 switching, and this moment, terminal was not still known;
102, terminal generates new Care-of Address COA such as mobile node automatically according to the RA message of sending from the destination service node;
103, mobile node is done address conflict to new Care-of Address COA and is detected (DAD, DuplicateAddress Detection) detection;
104, judging whether address conflict detects successful, is that the Care-of Address COA address of just thinking new can be used;
105, mobile node detect former service node unreachable after, initiate the Binding Update process, be accomplished to the Binding Update of HA, switch thereby finish L3.
For terminal check L3 takes place and switch, above-mentioned steps 103 and 105 in no particular order.
But in the handoff procedure of above-mentioned prior art L3, terminal is found that L3 switches or is finished that to switch to the flow process of destination service node from former service node very consuming time, and can't finish the switching of L3 under some scene.At first in step 103, DAD detection to new Care-of Address COA is finished by timeout mechanism, when mobile node MN is sent DAD inspection message, if not having other service nodes in setting-up time replys, think that promptly new Care-of Address COA does not conflict, just can use, therefore need take a long time other service nodes of wait and reply; Secondly, in step 105, mobile node MN detects the inaccessible operation of former service node and also finishes by timeout mechanism.After carrying out above-mentioned two steps, terminal just confirms to take place the L3 switching.According to the standard of RFC, these are overtime all to be more than the second level.So Chang time delay causes the professional rapid variation of QOS, has a strong impact on service quality and network performance.
In addition, in wireless network, in order to guarantee service quality, sometimes require in handoff procedure, when new communicating pair is not also finished communication foundation, do not remove old communication link, because former service node is in reachable state in this process always, therefore step 105 may can't be finished always, also promptly can't finish L3 always and switch.
Summary of the invention
Embodiment of the invention technical problem to be solved provides a kind of layer three switching processing method, terminal and destination service node, can accelerating terminal finds process that L3 switches, reduces the L3 handover delay and reduces the radio open flow, has significantly reduced professional interruption time delay, improved network performance and service quality by a relatively large margin.
For solving the problems of the technologies described above, the purpose of the embodiment of the invention is achieved through the following technical solutions: a kind of layer three switching processing method are provided, comprise step: send the information that takes place or need genetic horizon three to switch to network side; Accept the network side notice or assist genetic horizon three switchings.
The embodiment of the invention also provides a kind of terminal, comprising: information sending module is used for sending the information that takes place or need genetic horizon three to switch to network side; Switch mode judge module, layer three switch mode that are used for judging the control messages that network side sends are that network side assists to switch, and still finish switching by terminal oneself; Switching executing module is used for carrying out layer three switching according to the determined switch mode of switch mode judge module.
The embodiment of the invention also provides a kind of destination service node, comprising: information receiving module, the information that is used for the generation of receiving terminal transmission or needs genetic horizon three to switch; The address conflict detection module is used to judge whether the interface identifier of described terminal is available; The IP address assignment module is used for detecting the interface identifier of described terminal when unavailable when address collision detection module, is described terminal distribution conflict IP address not.
Since the embodiment of the invention adopt network side initiatively replacement terminal carry out that the L3 switching has taken place for DAD, proactive notification terminal, whether whether available or former service node can reach by detect new IP address such as overtime modes such as DAD without terminal, therefore can accelerating terminal find process that L3 switches, reduce the L3 handover delay and reduce the radio open flow, significantly reduced professional interruption time delay, improved network performance and service quality by a relatively large margin.
Description of drawings
Fig. 1 is the flow chart that prior art layer three switches;
Fig. 2 is embodiment of the invention layer three a switching processing method flow diagram;
Fig. 3 is the terminal structure schematic diagram during embodiment of the invention layer three switches;
Fig. 4 is the destination service node structure schematic diagram during embodiment of the invention layer three switches;
Fig. 5 is an address conflict detection module structural representation in the destination service node during embodiment of the invention layer three switches.
Embodiment
The embodiment of the invention communication system such as mobile communication system in, in order effectively to utilize Radio Resource, to improve network performance, network side generally serves as effector's role, network controls the process and the behavior of most of terminal in network of communication.Generally speaking, network side can judge whether the terminal of communicating by letter with it needs to take place the L3 switching or L3 is not taking place to be switched.Utilize this characteristic, the L3 switching can the proactive notification terminal take place in network side, and whether whether available or former service node can reach by detect new IP address such as overtime modes such as DAD without terminal.In addition, the switching of network controls, can be implemented in the contextual information that transmits relevant terminal and link between former service node and destination service node, utilize these information, network side can further be finished contextual information at the destination service node and generate and produce the IP address and switch with the L3 that realizes network side and initiatively initiate, and need not be again by generate operation such as IP address with terminal interaction.
The embodiment of the invention is enumerated in the mobile communication mobile node and L3 takes place is switched to example to clearly demonstrate embodiment of the invention principle, certainly, in other general networkings, when the router that sends RA message can be from the contextual information of other entities of network or other approach acquisition terminal, and definite terminal will be linked into this router following time, and the embodiment of the invention also can be applied in these networks.In described mobile communication, carry out L3 when switching, can comprise the network entity at former service node, destination service node, terminal, service node place and network controller or the like functional entity.Wherein service node can be a couple in router.Used agreement mainly is the RFC3775 of IPv6 and relevant safety standard RFC3776 agreement.
Below in conjunction with execution mode and accompanying drawing, the embodiment of the invention is described in detail.
The RA message that the embodiment of the invention adopts the network side transmission to carry expansion control sign is notified described terminal to take place to the method for terminal or is needed genetic horizon three switchings.Described expansion control sign adopts five two compositions that keep in the position in the RA message.Be defined as follows:
Table one: the expansion control sign in the RA message
The value of RCI is done as giving a definition:
| The RCI value | Meaning |
| 00 | With compatible before the expansion, after receiving, service node this flag bit is not done any processing. |
| 11 | The L3 switching has taken place, and has not carried IID Option. |
| 10 | The L3 switching has taken place, and the IID of the current use of terminal do not conflict on link-local, need not be DAD again and just can directly use. |
| 01 | The L3 switching has taken place, and when the IID of the current use of terminal conflicts on link-local, node can not use current IID on this link-local. |
The value of table two: RCI
In addition, the optional Option option of definition in RA message is named as IID (Interface IDentifier) Option again, is defined as follows:
Table three: the definition of expansion Option option
Wherein:
The value that Type:9 or other and current RFC standard are not conflicted.
Length: the length with the whole Option of 8 byte-identifiers comprises Type and Length territory.
IID length: the length of back LLI field (calculating) with bit.Value 0～128 is that what represented in 128 o'clock to carry is a complete IP address.
Reserved: reserved field, must fill out 0 entirely, receiving terminal is ignored its content.
IID orIP address: router is IID or the IP address that terminal generates.The generation of IID must be satisfied the standard of RFC agreement.
Padding: filler, for the length that guarantees whole Option is the integer quilt of 8 bytes, 0～63 bit of scope.
Intactly, the destination service node utilizes the L3 handover operation of the value of RCI bit in conjunction with Option option control terminal in the embodiment of the invention:.
One, when can obtaining the contextual information of terminal and definite terminal from other entities of network or other approach, the destination service node that sends RA message will move to this service node following time, by sending the RA message of point-to-point, comprise RCI bit and/or IID Option.
More than to the expansion of RA message, mainly be applicable to the situation of mobile IP.But for the situation of general ip, if satisfy above-mentioned condition, network also can be accelerated the access process of terminal in service node by increase above-mentioned information in RA message, reduces to postpone, and promotes service quality.
Two, terminal node is divided into four kinds of situations after receiving the RA message that comprises RCI bit or IID option:
RCI is the first expansion control sign: 11, show genetic horizon three switchings, and terminal obtains the IP address according to the standard of IETFRFC, has detected the subsequent operation after layer three switches.In 201, do not do the situation that address conflict detects for terminal.
RCI is the second expansion control sign: 10, show genetic horizon three switchings, and network side carried out the DAD detection for the current IID of terminal and passed through, in the IP address of terminal is under the stateless generation situation, directly generate IP address on this link with its IID and described RA message, and not needing to carry out DAD detects, be applied under the situation of mobile IP in described layer three switching processing method, IP address on described this link is a Care-of Address, the destination service node send immediately carry described IP address binding update messages to home agent; If for having under the state generation situation, and carried IID or IP address in the described RA message in the IP address of terminal, then terminal use this IP address or the IP address that generates by IID as its IP address on new link, do not carry out DAD.
RCI is the 3rd expansion control sign: 01, show genetic horizon three switchings, and network side carried out the DAD detection for the current IID of terminal but did not pass through, in the IP address of terminal is under the stateless generation situation, and do not carry IID or IP address in the described RA message, terminal is carried out follow-up operation according to the standard of IETF RFC definition; Carry in described RA message under IID or the IP address situation, the IP address that terminal is used this IP address of carrying or the IID that carries thus generates is not carried out DAD and is detected as its IP address on new link.
RCI is the 4th expansion control sign: 00, show the definition compatibility of working as with current RFC, and terminal is handled by existing RFC standard.
Consult Fig. 2, embodiment of the invention layer three switching processing method comprise the steps:
201, the L3 switching taking place maybe needs to take place the L3 switching;
This step is meant that network side knows that terminal takes place maybe to need to take place L3 and switches.In IPv6, when regulating and control at resource optimization or via network controller, whether the terminal that network side can be judged communication with it needs to take place the L3 switching or the L3 switching is not taking place.Detect if network side no longer replaces terminal that address conflict is done in its IP address, then directly enter following steps 205, directly send and carry the first R3 message of expanding the control sign, tell terminal to send the L3 switching to terminal.No longer carry out the step of back.If network side will be done the address conflict detection of its IP address for terminal, then carry out following step.
202, the destination service node obtains the contextual information of terminal from former service node;
Network side can be implemented in the contextual information that transmits relevant terminal and link between former service node and destination service node, comprises the interface identifier IID of terminal.The destination service node generates new IP address together according to the IID that obtains and the prefix Prefix information of router.
203, the destination service node is directly done the address conflict detection to the IP address that generates by IID;
After the destination service node generates new IP address according to the prefix Prefix of terminal IID and router, replace terminal that address conflict is done in new IP address and detect DAD, whether can be used for link after terminal is switched to test described new IP address.
It is that the destination service node carries out DAD for terminal that the embodiment of the invention requires router, but the RFC standard of prior art is not done the regulation of this respect, therefore can realize that network side carries out the step of DAD by the expansion to existing RFC, be several optional approach below:
203a, destination service node be by the IP address list or the IID tabulation of wherein all terminal configuration of the network entity record at place, directly judge newly the terminal described IP address that will insert or by the IP address of IID generation whether with existing IP address conflict.For some network, because the needs of network control, router is that the network entity at destination service node place has write down its IP address list or IID tabulation of all terminal configuration down, so the embodiment of the invention can be carried out DAD with the method.
The detected object that 203b, described address conflict detect is the IP address list that adjacent area list information (Neighbor Cache) is gone up all terminals of using on the current link of preserving, before the destination service node finds that deletion will be worn out and prepare in certain IP address, send NS message whether also effectively to detect described IP address, be then to continue to keep, and put its state, otherwise deletion for reaching.Because in the regulation, service node can be safeguarded an adjacent area list information in RFC 2461.Preserved the IP address of neighbours' service node that this service node within a certain period of time communicated by letter with it in the described tabulation.If this IP address list is the IP address list of all terminals of using on the current link, network can obtain and has the terminal that newly enters of not conflicting the IP address with the IP address of using according to this tabulation so.
203c, described address conflict detect specifically: the destination service node directly sends the address conflict detect-message to described terminal with the IP address of using in this locality and detects to carry out address conflict.Router is that the destination service node also can replace terminal to carry out address conflict and detect in its local DAD message that directly sends.
204, judge whether address conflict detects successful, is that the IP address of just thinking new can be used, and enters step 205, otherwise enter step 206;
Following steps are the described terminal generations of network side proactive notification or need genetic horizon three switchings:
205, send RA message to terminal, show that L3 takes place to be switched, and need not do address conflict again and detect;
This step is to be the second expansion control sign situation corresponding to above-mentioned RCI.Be that RA message shows genetic horizon three switchings, and network side carried out the DAD detection for the current IID of terminal and passed through, in the IP address of terminal is under the stateless generation situation, directly generate IP address on this link in that terminal is local with its IID and described RA message, and not needing to carry out DAD detects, be applied under the situation of mobile IP in described layer three switching processing method, IP address on described this link is a Care-of Address, the destination service node send immediately carry described IP address binding update messages to home agent; For having under the state generation situation, and carried IID or IP address in the described RA message in the IP address of terminal, then terminal use this IP address or the IP address that generates by IID as its IP address on new link.
As described above, new IP address can directly be generated with its IID and described RA message by terminal this locality, also can be obtained by the IID in the RA message of carrying the Option option or IP address.
That to be terminal judge that according to the RA message of receiving address conflict that network side carries out detects is obstructed out-of-date with next bar step, the remedial measure of taking.Wherein 206a, 206b and 206c can choose one wantonly.
206a, transmission RA message show the L3 switching take place and show current IID conflict that to terminal the behavior after detecting the DAD conflict that defines according to current I ETF RFC after terminal is received is operated; This option is to be the 3rd expansion control sign, not carry the situation of IID or IP address corresponding to above-mentioned RCI;
206b, destination service node generate the new IID or the information of IP address, finishing DAD detects, transmission is carried the RA message of new IID or IP address to terminal, show that L3 takes place to be switched, require terminal to use new IID to generate IP address or the direct IP address of carrying of using, this option map network side is that terminal is carried out the DAD failure, and does not need terminal to carry out the situation of DAD again; This option is different from step 203, and step 203 is directly to obtain the current IID of terminal from former service node, and is that the destination service node is that terminal generates new IID here, and tells terminal; In addition, this option is to be the 3rd expansion control sign, to carry the situation of IID or IP address corresponding to above-mentioned RCI;
206c, destination service node directly are not conflict IP address of one of terminal distribution, and send to terminal and directly use;
In addition, when a terminal of not supporting the RA message of described expansion is received the RA message that comprises this expansion control sign, ignore described expansion content according to the regulation of RFC.This option is to be the situation of the 4th expansion control sign corresponding to above-mentioned RCI.
207, initiate the Binding Update process, be accomplished to the Binding Update of HA, switch thereby finish L3.
After obtaining described available new IP address, terminal is accomplished to the Binding Update of HA to initiating the Binding Update process, switches thereby finish L3.
From as can be seen above, since the embodiment of the invention adopt network side initiatively replacement terminal carry out that the L3 switching has taken place for DAD, proactive notification terminal, whether whether available or former service node can reach by detect new IP address such as overtime modes such as DAD without terminal, so the embodiment of the invention can reduce the L3 handover delay and reduce the radio open flow; Because the L3 switching has taken place in network side proactive notification terminal, thereby the process of accelerating terminal discovery L3 switching, because under some situation of radio communication, terminal possibly can't obtain the information that L3 switches; In addition since the destination service node send RA information to terminal before, just can obtain terminal in its IP address of using down, thereby can shift to an earlier date whether sense terminals conflicts the IP address of use or legal in new service node or network; And can under the situation of result of DAD, can also specify new IP address for terminal for conflict.
To sum up, switching time when the embodiment of the invention can be accelerated terminal greatly and inserts a new service node, particularly accelerate in mobile IP, to carry out the time that L3 switches, and significantly reduced professional interruption time delay, improved network performance and service quality by a relatively large margin.
In other embodiments, similar option 206c, the destination service node directly is a not conflict IP address of one of terminal distribution, and send the RA message carry described IP address and directly use to terminal, and do not need step 202～204, do not need terminal to carry out DAD yet, accelerate terminal greatly and carry out the process that L3 switches.
The embodiment of the invention can adopt the mode of above-mentioned expansion to RA message to realize that the proactive notification terminal switches, and also can reach this target by other extended modes, and the mode that can also increase similar message newly realizes.But how these execution modes change, and all belong within the protection range of this patent.
The embodiment of the invention also provides a kind of terminal, with reference to figure 3, comprising: be used for sending the information transmitting unit 310 that takes place or need genetic horizon three handover informations to network side; Layer three switch mode that are used for judging the control messages that network side sends are that network side assists to switch, and are still finished the switch mode judging unit 320 of switching by terminal oneself; Be used for carrying out the switching performance element 330 that layer three switches according to the determined switch mode of switch mode judging unit; Be used for the DAD message sink unit 340 of the DAD message of receiving target service node transmission, and the address conflict detecting unit 350 that is used for carrying out according to DAD message the address conflict detection of self.
The embodiment of the invention also provides a kind of destination service node, with reference to figure 4,5, comprise: be used for generation that receiving terminal sends or the information receiving unit 410 that needs genetic horizon three handover informations, be used to judge the whether available address conflict detecting unit 420 of interface identifier of described terminal, be used for detecting the interface identifier of described terminal when unavailable, be the described terminal distribution IP address assignment unit 430 of conflict IP address not when collision detection unit, address.Wherein address conflict detecting unit 420 comprises: the IP address list or the IID list information of all terminal configuration that is used to read the network entity record at described destination service node place, or read the list information read module 421 of adjacent area list information, be used for the tabulation that described list information read module reads is analyzed, determine the not conflict IP address determination module 422 of conflict IP address, and the DAD message transmission module 423 that is used for DAD message is sent to terminal.
The generation that sends by information receiving unit 410 receiving terminals or need genetic horizon three handover informations, whether the interface identifier of judging described terminal by address conflict detecting unit 420 is available, in the process of carrying out the address conflict detection, can utilize list information read module 421 to read the list information of adjacent area list information, the tabulation of reading by 422 pairs of described list information read modules of conflict IP address determination module is not analyzed then, determines not conflict IP address; Perhaps adopting DAD message transmission module 423 that DAD message is sent to terminal, have terminal self to carry out address conflict and detect, is not conflict IP address of described terminal distribution by IP address assignment unit 430 at last.
From as can be seen above, the L3 switching has taken place in the proactive notification terminal, whether whether available or former service node can reach by detect new IP address such as overtime modes such as DAD without terminal because the embodiment of the invention adopts, and therefore can reduce the L3 handover delay and reduces process that radio open flow, accelerating terminal find that L3 switches, has significantly reduced professional interruption time delay, improved network performance and service quality by a relatively large margin.
More than a kind of layer three switching processing method, system and device were described in detail to the embodiment of the invention provides, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1, a kind of layer three switching processing method is characterized in that, comprise step:
Send the information that takes place or need genetic horizon three to switch to network side;
Accept the network side notice or assist genetic horizon three switchings.
2, layer three switching processing method according to claim 1, it is characterized in that, described network side is the destination service node, and when it obtains terminal information that genetic horizon three switches takes place or needs, by address conflict detect judge described terminal interface identifier can with or be not conflict IP address of terminal distribution.
3, layer three switching processing method according to claim 2 is characterized in that, described address conflict detects following any one mode of concrete employing and is:
The IP address list or the interface identifier tabulation of wherein all terminal configuration of the network entity record of destination service node by the place directly draw and existing IP address not conflict IP address or the IP address that generated by interface identifier; Or
The destination service node obtains according to the IP address list of all terminals of using on the current link of preserving on the adjacent area list information and has the terminal that newly enters of not conflicting the IP address with the IP address of using; Or
The destination service node directly sends the address conflict detect-message to described terminal with the IP address of using in this locality and detects to carry out address conflict.
4, layer three switching processing method according to claim 3, it is characterized in that, detect the second way for address conflict, before the destination service node finds that deletion will be worn out and prepare in certain IP address in the described tabulation, send NS message whether also effectively to detect described IP address, be then to continue to keep, and put its state for reaching, otherwise deletion.
5, according to claim 1 layer three switching processing method is characterized in that, described accept the network side notice or assist genetic horizon three to switch in, described terminal does not need to carry out address conflict and detects.
6, a kind of terminal is characterized in that, comprising:
Information transmitting unit is used for sending the information that takes place or need genetic horizon three to switch to network side;
Switch mode judging unit, layer three switch mode that are used for judging the control messages that network side sends are that network side assists to switch, and still finish switching by terminal oneself;
Switch performance element, be used for carrying out layer three switching according to the determined switch mode of switch mode judging unit.
7, terminal according to claim 6 is characterized in that, also comprises:
DAD message sink unit is used for the DAD message that the receiving target service node sends.
The address conflict detecting unit, the address conflict that is used for carrying out according to DAD message self detects.
8, a kind of destination service node is characterized in that, comprising:
Information receiving unit, the information that is used for the generation of receiving terminal transmission or needs genetic horizon three to switch;
The address conflict detecting unit is used to judge whether the interface identifier of described terminal is available;
The IP address assignment unit is used for detecting the interface identifier of described terminal when unavailable when collision detection unit, address, is described terminal distribution conflict IP address not.
9, destination service node according to claim 8 is characterized in that, described address conflict detection module specifically comprises:
The list information read module is used to read the IP address list or the IID list information of all terminal configuration of the network entity record at described destination service node place, or reads adjacent area list information;
The conflict IP address determination module is not used for the tabulation that described list information read module reads is analyzed, and determines not conflict IP address.
10, according to Claim 8 or 9 described destination service nodes, it is characterized in that described address conflict detection module specifically also comprises:
The DAD message transmission module is used for DAD message is sent to terminal.
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|---|---|---|---|
| CNA2008100824129A CN101257427A (en) | 2006-07-31 | 2006-07-31 | Layer three switch processing method and apparatus |
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| CNA2008100824129A CN101257427A (en) | 2006-07-31 | 2006-07-31 | Layer three switch processing method and apparatus |
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| CNA200610104036XA Division CN101119291A (en) | 2006-07-31 | 2006-07-31 | Method and system for processing three-layer switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011063683A1 (en) * | 2009-11-30 | 2011-06-03 | 中兴通讯股份有限公司 | Method and system for terminal device upgrade |
| CN103098445A (en) * | 2011-08-10 | 2013-05-08 | 华为技术有限公司 | Method, data gateway and system for processing addresses |
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2006
- 2006-07-31 CN CNA2008100824129A patent/CN101257427A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011063683A1 (en) * | 2009-11-30 | 2011-06-03 | 中兴通讯股份有限公司 | Method and system for terminal device upgrade |
| CN103098445A (en) * | 2011-08-10 | 2013-05-08 | 华为技术有限公司 | Method, data gateway and system for processing addresses |
| CN103098445B (en) * | 2011-08-10 | 2016-03-30 | 华为技术有限公司 | Process the method for address, data gateway and system |
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