CN100495992C - Duplicated address detection method used for address conflict and network node equipment - Google Patents
Duplicated address detection method used for address conflict and network node equipment Download PDFInfo
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- CN100495992C CN100495992C CNB2007100299884A CN200710029988A CN100495992C CN 100495992 C CN100495992 C CN 100495992C CN B2007100299884 A CNB2007100299884 A CN B2007100299884A CN 200710029988 A CN200710029988 A CN 200710029988A CN 100495992 C CN100495992 C CN 100495992C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0866—Checking the configuration
- H04L41/0873—Checking configuration conflicts between network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5046—Resolving address allocation conflicts; Testing of addresses
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Abstract
The present invention discloses a detection method after the repetitive address conflict. The present invention comprises that, after the address conflict is detected, the conflicted node can repeat the address list according to the conflicted address retrieval; according to the detected result, whether the conflicted address hits the repetitive address list information is detected, if the conflicted address doest hit, the repetitive address list is configured according to the conflicted address, and or the repetitive address list information is updated according to the retrieving result; the repetitive address detection is performed to the node causing the conflict according to the repetitive address list information. Relevantly, the present invention also discloses a network node equipment. According to the detection method and the network node equipment after the repetitive address conflict of the present invention, a DAD detection can be positively initiated to detect the link change and to reduce the unavailable state period of the conflicted node as much as possible.
Description
Technical field
The present invention relates to network communication field, relate in particular to a kind of repeat address detecting method and apparatus for network node that is used for address conflict.
Background technology
In the IPv6 network, address space is quite huge, can accomplish to allow that each sand can both have an IPv6 address on the earth, so each equipment can both have the address of a global addressing in the user network.Address assignment can be divided into two big classes among the IPv6: have state address distribution and stateless address based on DHCP (DHCP) are distributed.The former strictly control address distribute, and stateless address to distribute be that main frame or terminal are by obtaining advertising of route (Router Advertisement from router, RA) message obtains the prefix of 64bit, and affix receives the host interface identifier of this RA message to obtain the IPv6 address of 128bit again.
Occur two nodes in the broadcast type network and have identical IP address, the RFC2462 regulation composes an IPv6 unicast address to before the interface use, must in the subnet of sharing same prefix space, carry out duplicate address detection (Duplicate Address Detection, DAD), to guarantee the uniqueness of this address in subnet.
In the network management of reality, may occur owing to static configuration, the phenomenon that leads to a conflict takes place.As shown in Figure 1, network has disposed link local address FE80::1 to router-A, if give this moment router B configuration same link local address FE80::1 again, before this address is composed to router B, can carry out DAD and survey, to guarantee the uniqueness of address in the link.In case after a DAD surveys failure, router B is because of the link local address conflict, the interface that causes router B to go up this repeat to address (RA) of configuration is in agreement DOWN state, if this moment, router-A has changed its link local address, as FE80::2, the link local address FE80::1 that this moment, router B upward disposed has had uniqueness, can use, but because router B lacks the mechanism of rationally surveying, can not in time detect the variation of router-A in the link, make link local address FE80::1 still be in down state.The inventor is in realizing process of the present invention, find in the prior art, owing to lacked the mechanism of reasonably surveying by conflicting nodes, (as the node that causes conflict has changed the address that causes conflict can not in time to detect the variation that takes place in the link, the node that perhaps causes conflict breaks away from from network), cause not had under the artificial situation of intervening by conflicting nodes, for a long time in or be in down state all the time.
Summary of the invention
The embodiment of the invention provides a kind of repeat address detecting method and apparatus for network node that is used for address conflict, active detecting (Address Duplicate-Initiative Detection behind the employing address conflict, AD-ID) mechanism, come timely detecting link to change by initiatively initiating duplicate address detection (DAD detection), make conflicting nodes in time be in upstate.
On the one hand, the embodiment of the invention has proposed a kind of repeat address detecting method that is used for address conflict, comprising:
After detecting the generation address conflict, tabulated according to conflict address search repeat to address (RA) by conflicting nodes;
Whether hit the repeat to address (RA) tabulation according to result for retrieval inspection conflict address, if do not hit, then according to described conflict address configuration repeat to address (RA) list information, otherwise, upgrade the repeat to address (RA) list information according to result for retrieval;
Initiatively initiate duplicate address detection according to described repeat to address (RA) list information to the node that causes conflict.
On the other hand, the embodiment of the invention also provides a kind of apparatus for network node, comprises a plurality of communication interface units, be connected with other network or apparatus for network node, and receive data message from other apparatus for network node, wherein, described apparatus for network node also comprises:
The list storage unit is used to store the repeat to address (RA) tabulation;
Retrieval unit is used for the repeat to address (RA) tabulation according to conflict address search list storage unit, and the output result for retrieval;
The result for retrieval processing unit, when the result for retrieval of retrieval unit is the tabulation of miss repeat to address (RA), according to the repeat to address (RA) list information in the described list storage of the conflict address configuration unit, perhaps when the result for retrieval of retrieval unit when hitting the repeat to address (RA) tabulation, upgrade repeat to address (RA) list information in the described list storage unit according to result for retrieval;
The active probe unit is used for initiatively initiating duplicate address detection according to the repeat to address (RA) list information that described list storage unit is stored.
In sum, the embodiment of the invention provides detection method and the apparatus for network node after the conflict of a kind of repeat to address (RA), active probe (Address Duplicate-Initiative Detection behind the employing address conflict, AD-ID) mechanism, promptly introduce repeat to address (RA) tabulation (Duplicate Address List, DAL), by conflicting nodes by the information in the retrieval DAL tabulation, and initiatively initiate DAD according to the information of DAL list records and survey timely detecting link to change, reduce the cycle of the down state of conflicting nodes as much as possible.
Description of drawings
Fig. 1 is the example schematic of a kind of repeat to address (RA) conflict;
Fig. 2 is the structural representation of a kind of apparatus for network node of providing of the embodiment of the invention;
Fig. 3 is the structural representation of the described result for retrieval processing unit of Fig. 2;
Fig. 4 is the structural representation of a kind of apparatus for network node of providing of the embodiment of the invention;
Fig. 5 is the structural representation of the described result of detection processing unit of Fig. 4;
Fig. 6 is the flow chart of first specific embodiment of a kind of repeat address detecting method that is used for address conflict provided by the invention;
Fig. 7 is the flow chart of second specific embodiment of a kind of repeat address detecting method that is used for address conflict provided by the invention.
Embodiment
A kind of repeat address detecting method and apparatus for network node that is used for address conflict that the embodiment of the invention provides is active probe (Address Duplicate-Initiative Detection behind the employing address conflict, AD-ID) mechanism, survey timely detecting link to change by initiatively initiating DAD, make conflicting nodes in time be in upstate.
Elaborate the detection method after a kind of repeat to address (RA) conflict that the embodiment of the invention provides and the technical scheme of apparatus for network node below in conjunction with accompanying drawing.
With reference to figure 2, be the structural representation of a kind of apparatus for network node of providing of the embodiment of the invention; Described apparatus for network node comprises:
Result for retrieval processing unit 4, when the result for retrieval of retrieval unit 3 is the tabulation of miss repeat to address (RA), according to the repeat to address (RA) list information in the described list storage of the conflict address configuration unit 2, perhaps when the result for retrieval of retrieval unit 3 when hitting the repeat to address (RA) tabulation, upgrade repeat to address (RA) list information in the described list storage unit 2 according to result for retrieval;
Wherein, as shown in Figure 3, the described result for retrieval processing unit 4 of Fig. 2 comprises:
Dispensing unit 41 when the judged result of judging unit 43 output when being miss, is used for adding the new record relevant with this conflict address according to the conflict address in the DAL tabulation;
Ageing time reset cell 421, when conflict interface when hitting the interface that writes down in the described chain of interfaces that clashes, the timing threshold value of the ageing time that is used to reset;
Collision count administrative unit 423 when the conflict interface is not the interface that writes down in the described chain of interfaces that clashes, increases count information in collision count.
What deserves to be explained is that the data structure of the DAL tabulation that the embodiment of the invention and following all embodiment are mentioned is described as shown in table 1,
Table 1
Wherein, being explained as follows of each Option Field:
Conflict address: preserve the address that clashes;
The chain of interfaces that clashes: preserve the interface that clashes;
Collision count: this field was used in combination with last field, at counting was under 0 the situation, can delete this list item;
Ageing time: initiate the time that DAD detects again;
Cause the MAC Address (optional) of the node of conflict: the MAC Address of preserving the node that causes conflict;
With reference to figure 4, be the structural representation of a kind of apparatus for network node of providing of the embodiment of the invention; Described apparatus for network node except have with the described identical structure of Fig. 2, also further comprise a result of detection processing unit 6, be used for the result that the active probe unit detects is handled.The concrete structure of described result of detection processing unit 6 as shown in Figure 5, it specifically comprises:
Ageing time trigger element 62 is used for adress analysis unit 61 and analyzes described conflict address when not having uniqueness, triggers the ageing time reset cell, the replacement ageing time;
Describe the technical scheme of a kind of apparatus for network node that the embodiment of the invention proposes above in detail, elaborate the technical scheme of the detection method after a kind of repeat to address (RA) conflict of the embodiment of the invention below in conjunction with Fig. 6, Fig. 7.
With reference to figure 6, be the flow chart of first specific embodiment of a kind of repeat address detecting method that is used for address conflict provided by the invention.The described repeat address detecting method that is used for address conflict comprises:
Step S1 after detecting the generation address conflict, is tabulated according to conflict address search DAL by conflicting nodes;
Whether step S2 hits the repeat to address (RA) tabulation according to result for retrieval inspection conflict address, if do not hit, and then according to described conflict address configuration repeat to address (RA) list information, otherwise, upgrade the repeat to address (RA) list information according to result for retrieval;
Step S3 initiatively initiates duplicate address detection (DAD detection) according to described repeat to address (RA) list information to the node that causes conflict.
Wherein, the data structure of described DAL tabulation is identical, as shown in table 1 with the described DAL tabulation of the foregoing description, and it comprises option: conflict address, the chain of interfaces that clashes, collision count, ageing time, the MAC Address (optional) of the node of conflict of causing.
Wherein, in step S2, describedly upgrade the repeat to address (RA) list information according to result for retrieval and be specially:
Whether the interface that inspection clashes hits the chain of interfaces that clashes in the tabulation of repeat to address (RA), if hit, the ageing time of then resetting, otherwise, increase the count information of collision count, and in the chain of interfaces that clashes, add the described interface message that clashes;
Wherein, in step S3, initiatively initiate the DAD detection according to described repeat to address (RA) list information to the node that causes conflict and be specially:
When timing reaches ageing time, choose the interface (as: interface that clashes the earliest) in the chain of interfaces that clashes to initiate the DAD detection to the node that causes conflict.
When specific implementation, after step S3, can further include following step:
Judge according to the DAD result of detection whether the conflict address has uniqueness, if not, the ageing time of then resetting, otherwise, next step entered;
The count value of collision count subtracts 1, and removes described interface in the chain of interfaces that clashes, and when collision count is 0, then removes the repeat to address (RA) tabulation of described conflict address correspondence.
What deserves to be explained is that in above-mentioned specific embodiment, described step S1 can be substituted by following step:
After causing the node change conflict address of conflict, be that source address sends RA termination message with the conflict address;
After being in the described RA termination of being received of same link message, parse the source address of message, and tabulate as conflict address search repeat to address (RA) with described source address by conflicting nodes.
Wherein, when the tabulation of retrieval repeat to address (RA), if repeat to address (RA) tabulation is hit in described conflict address, and when being hit the repeat to address (RA) tabulation, then utilize this interface to initiate DAD and survey to the described node that causes conflict by the interface that is used to receive described RA termination message of conflicting nodes.
In order to further specify the technical scheme of the embodiment of the invention, a kind of second specific embodiment that is used for the repeat address detecting method of address conflict is proposed below in conjunction with Fig. 7.
As shown in Figure 7, a kind of repeat address detecting method that is used for address conflict comprises:
Step S101 surveys by DAD, the repeat to address (RA) conflict is arranged after, according to conflict address search DAL tabulation, the data structure of described DAL tabulation is described same as the previously described embodiments by conflicting nodes;
Step S102 judges according to result for retrieval whether the conflict address hits the DAL tabulation, if, execution in step S103 then, otherwise, execution in step S106;
Step S103 checks whether the interface clash hits the chain of interfaces that clashes in the DAL tabulation, if, execution in step S104 then, otherwise, execution in step S105;
Step S104, when the interface that clashes hit the DAL tabulation, the ageing time of the DAL that then resets tabulation was surveyed to avoid too much DAD, then execution in step S107;
Step S105 when the interface that clashes does not hit the DAL tabulation, then adds the described interface message that clashes in the chain of interfaces that clashes of DAL tabulation, and increases the count information of collision count, execution in step S107 then;
Step S106 if the DAL tabulation is not hit in the conflict address, then increases the list information of this conflict address correspondence, that is: in the DAL tabulation
In the conflict address option of DAL tabulation, increase described conflict address, in the chain of interfaces option that clashes, increase the interface message of described conflict address correspondence, and the count value of collision count is added 1 and the replacement ageing time.
Step S107 judges whether the list item of DAL tabulation begins to wear out, that is: whether timing reaches that ageing time is provided with the timing threshold value in the DAL tabulation, if, execution in step S108 then, otherwise, this step continued;
Step S108, the interface of selecting to clash the earliest from the chain of interfaces that clashes of DAL tabulation is initiated the DAD detection;
Step S109 checks according to the DAD result of detection whether described conflict address is unique, if execution in step S110 then, otherwise continue this step;
Step S110, now has uniqueness if confirm described conflict address, then remove the interface (interface that clashes the earliest described in the step S108) of this conflict address correspondence in the chain of interfaces that clashes in the DAL tabulation, and make the count value of collision count subtract 1;
Step S111 judges whether the count value of collision count is 0, if, execution in step S112 then, otherwise, this step continued;
Step S112 deletes the DAL list option of this conflict address correspondence.
Detect described conflict address by above-mentioned steps and had uniqueness, promptly return to up state, network node can utilize this address to initiate network service.
By the foregoing description as can be known, a kind of repeat address detecting method and apparatus for network node that is used for address conflict that the embodiment of the invention provides, active probe (Address Duplicate-InitiativeDetection behind the employing address conflict, AD-ID) mechanism, promptly introduce repeat to address (RA) tabulation (Duplicate Address List, DAL), by conflicting nodes by the information in the retrieval DAL tabulation, and initiatively initiate DAD according to the information of DAL list records and survey timely detecting link to change, make the conflict address in time be in upstate, reduce the cycle of the down state of conflicting nodes as much as possible.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (14)
1, a kind of repeat address detecting method that is used for address conflict is characterized in that, comprising:
After detecting the generation address conflict, tabulated according to conflict address search repeat to address (RA) by conflicting nodes;
Judge according to result for retrieval whether the conflict address hits the repeat to address (RA) tabulation, if do not hit, then according to described conflict address configuration repeat to address (RA) list information, otherwise, upgrade the repeat to address (RA) list information according to result for retrieval;
Initiatively initiate duplicate address detection according to described repeat to address (RA) list information to the node that causes conflict.
2, the method for claim 1 is characterized in that, the option of described repeat to address (RA) tabulation comprises: conflict address, the chain of interfaces that clashes, collision count, ageing time.
3, method as claimed in claim 2 is characterized in that, the option of described repeat to address (RA) tabulation further comprises: the MAC Address that causes the node of conflict.
4, method as claimed in claim 2 is characterized in that, describedly upgrades the repeat to address (RA) list information according to result for retrieval and is specially:
Whether the interface that inspection clashes hits the chain of interfaces that clashes in the tabulation of repeat to address (RA), if hit, the ageing time of then resetting, otherwise, increase the count information of collision count, and in the chain of interfaces that clashes, add the described interface message that clashes.
As claim 2 or 4 described methods, it is characterized in that 5, the step of initiatively initiating duplicate address detection to the node that causes conflict according to described repeat to address (RA) list information is specially:
When timing reaches ageing time, choose the interface in the chain of interfaces that clashes to initiate duplicate address detection to the node that causes conflict.
6, method as claimed in claim 5 is characterized in that, described method further comprises:
Result according to described duplicate address detection judges whether the conflict address has uniqueness, if not, the ageing time of then resetting, otherwise, the count value of collision count subtracts 1, and in the chain of interfaces that clashes, remove described interface, when collision count is 0, then remove the repeat to address (RA) list information of described conflict address correspondence.
7, method as claimed in claim 1 or 2 is characterized in that, and is described after detecting the repeat to address (RA) conflict, can be substituted by following step by the step of conflicting nodes according to the repeat to address (RA) tabulation of conflict address search:
After causing the node change conflict address of conflict, be that source address sends advertising of route termination message with the conflict address;
After being in the described advertising of route termination of being received of same link message, parse the source address of message, and tabulate as conflict address search repeat to address (RA) with described source address by conflicting nodes.
8, method as claimed in claim 7, it is characterized in that, when the tabulation of retrieval repeat to address (RA), if the repeat to address (RA) tabulation is hit in described conflict address, and when also being hit the repeat to address (RA) tabulation, then initiate duplicate address detection to this node that causes conflict by the interface that is used to receive described advertising of route termination message of conflicting nodes.
9, method as claimed in claim 8 is characterized in that, described method further comprises:
Result according to described duplicate address detection judges whether the conflict address has uniqueness, if not, the ageing time of then resetting, otherwise, the count value of collision count subtracts 1, and in the chain of interfaces that clashes, remove described interface, when collision count is 0, then remove the repeat to address (RA) tabulation of described conflict address correspondence.
10, a kind of apparatus for network node comprises communication interface unit, be connected with other network or apparatus for network node, and reception is characterized in that from the data message of other apparatus for network node described apparatus for network node also comprises:
The list storage unit is used to store the repeat to address (RA) tabulation;
Retrieval unit is used for the repeat to address (RA) tabulation according to conflict address search list storage unit, and the output result for retrieval;
The result for retrieval processing unit, when the result for retrieval of retrieval unit is the tabulation of miss repeat to address (RA), according to the repeat to address (RA) list information in the described list storage of the conflict address configuration unit, perhaps when the result for retrieval of retrieval unit when hitting the repeat to address (RA) tabulation, upgrade repeat to address (RA) list information in the described list storage unit according to result for retrieval;
The active probe unit is used for initiatively initiating duplicate address detection according to the repeat to address (RA) list information that described list storage unit is stored.
11, equipment as claimed in claim 10 is characterized in that, the option of described repeat to address (RA) tabulation comprises: conflict address, the chain of interfaces that clashes, collision count, ageing time.
12, equipment as claimed in claim 11 is characterized in that, described result for retrieval processing unit comprises:
Judging unit is used to judge whether described conflict address hits the repeat to address (RA) tabulation, and the output judged result;
Dispensing unit, when the judged result of judging unit output when being miss, be used for according to the conflict address in the repeat to address (RA) tabulation add the new record relevant with this conflict address;
The list update unit, when the judged result of judging unit when hitting, be used for upgrading repeat to address (RA) each option information of tabulating according to result for retrieval.
13, equipment as claimed in claim 12 is characterized in that, described list update unit comprises:
The ageing time reset cell, when conflict interface when hitting the interface that writes down in the described chain of interfaces that clashes, the timing threshold value of the ageing time that is used to reset;
Interface management unit when the conflict interface is not the interface that writes down in the described chain of interfaces that clashes, adds the information of described conflict interface in the described chain of interfaces that clashes;
The collision count administrative unit when the conflict interface is not the interface that writes down in the described chain of interfaces that clashes, increases count information in collision count.
14, equipment as claimed in claim 13 is characterized in that, described apparatus for network node further comprises a result of detection processing unit, and it specifically comprises:
The adress analysis unit is used for judging according to the result of duplicate address detection whether the conflict address has uniqueness;
The ageing time trigger element is used for triggering the ageing time reset cell, the replacement ageing time when the adress analysis element analysis goes out described conflict address and do not have uniqueness;
The counting trigger element is used for when the adress analysis element analysis goes out described conflict address and has uniqueness, triggers the collision count administrative unit count value of corresponding collision count is subtracted 1;
The interface trigger element is used for when the adress analysis element analysis goes out described conflict address and has uniqueness, and the trigger interface administrative unit is removed described conflict interface from the described chain of interfaces that clashes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100299884A CN100495992C (en) | 2007-08-30 | 2007-08-30 | Duplicated address detection method used for address conflict and network node equipment |
| PCT/CN2008/072127 WO2009026849A1 (en) | 2007-08-30 | 2008-08-25 | Duplicate address detection method and network node device for address conflict |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100299884A CN100495992C (en) | 2007-08-30 | 2007-08-30 | Duplicated address detection method used for address conflict and network node equipment |
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| CN101110712A CN101110712A (en) | 2008-01-23 |
| CN100495992C true CN100495992C (en) | 2009-06-03 |
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| WO (1) | WO2009026849A1 (en) |
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| CN100495992C (en) * | 2007-08-30 | 2009-06-03 | 华为技术有限公司 | Duplicated address detection method used for address conflict and network node equipment |
| WO2011060571A1 (en) | 2009-11-17 | 2011-05-26 | 华为技术有限公司 | Method, apparatus and system for duplicate address detection proxy |
| CN102143036B (en) * | 2010-06-07 | 2015-04-08 | 华为技术有限公司 | Prefix sending method, prefix appointing method and corresponding devices |
| CN101945145B (en) * | 2010-09-10 | 2013-10-23 | 北京星网锐捷网络技术有限公司 | Address state processing method and system as well as network node |
| CN102209122A (en) * | 2011-05-18 | 2011-10-05 | 中兴通讯股份有限公司 | Method and system for automatically recovering after address duplication of IPv6 (Internet Protocol version 6) and node |
| US9026632B2 (en) * | 2012-03-15 | 2015-05-05 | Adva Optical Networking Se | Network with a network wide extended policy framework |
| CN104410547B (en) * | 2014-12-03 | 2017-09-29 | 合肥工大高科信息科技股份有限公司 | A kind of address conflict detecting method in dcs |
| US9344365B1 (en) * | 2015-02-03 | 2016-05-17 | Google Inc. | Mesh network addressing |
| CN108108300B (en) * | 2017-12-18 | 2020-06-16 | 北京东土科技股份有限公司 | Resource allocation detection method and device for operating system |
| CN109951871B (en) * | 2019-04-04 | 2021-05-11 | 乐鑫信息科技（上海）股份有限公司 | Method, device, terminal and storage medium for detecting node conflict |
| CN114285828B (en) * | 2021-12-21 | 2024-02-02 | 浙江中控技术股份有限公司 | Address conflict processing method, system, storage medium and network equipment |
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| JP3462626B2 (en) * | 1995-06-19 | 2003-11-05 | シャープ株式会社 | Address assignment method, wireless terminal device using the same, and wireless network using the same |
| JP2002190816A (en) * | 2000-12-20 | 2002-07-05 | Nec Corp | Wireless communication system |
| KR100948383B1 (en) * | 2003-03-04 | 2010-03-22 | 삼성전자주식회사 | Method of allocatng ip address and detecting duplication of ip address in ad hoc netwok |
| US7979582B2 (en) * | 2005-05-30 | 2011-07-12 | Panasonic Corporation | Communication device provided with ARP function |
| US7633855B2 (en) * | 2005-11-03 | 2009-12-15 | Cisco Technology, Inc. | System and method for resolving address conflicts in a network |
| JP4728792B2 (en) * | 2005-12-12 | 2011-07-20 | パナソニック株式会社 | IP communication apparatus, IP communication system including the same, and IP address setting method of IP communication apparatus |
| CN100495992C (en) * | 2007-08-30 | 2009-06-03 | 华为技术有限公司 | Duplicated address detection method used for address conflict and network node equipment |
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| WO2009026849A1 (en) | 2009-03-05 |
| CN101110712A (en) | 2008-01-23 |
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