CN101414892A - Method, system and node equipment for detecting link layer address collision - Google Patents
Method, system and node equipment for detecting link layer address collision Download PDFInfo
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- CN101414892A CN101414892A CNA2007101636103A CN200710163610A CN101414892A CN 101414892 A CN101414892 A CN 101414892A CN A2007101636103 A CNA2007101636103 A CN A2007101636103A CN 200710163610 A CN200710163610 A CN 200710163610A CN 101414892 A CN101414892 A CN 101414892A
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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
- H04L41/06—Management of faults, events, alarms or notifications
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/618—Details of network addresses
- H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses
Abstract
The invention discloses a link layer address conflict detection method, a system and node equipment thereof, which belong to the communication technology field. The method comprises the following steps: the address conflict detection message including the link layer address to be detected is sent out by broadcast; whether the address conflict detection message that states the link layer address can not be used can be received or not within required detecting time is judged; if so, the link layer address is in conflict; if not, the link layer is not in conflict. The system includes solicited-nodes and detecting nodes. The node equipment includes a sending module and a judging module. The invention also provides another type of node equipment which includes a receiving module and a detecting module. The invention can detect whether the link layer address to be detected is in conflict or not, thus avoiding the use of the address which is the same with the existing LLA, which can cause the conflict of link layer addresses.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of method of link layer address collision detection, system and node device.
Background technology
MAC (Media Access Control, media interviews control) address is the address of using on data link layer, is also referred to as physical address or link address, the packet switch of data link layer and forwarding in the Ethernet, all with MAC Address as sign.MAC Address also is the physical address of the network interface card of production firm's production, and each message that transmits on data link layer all contains the MAC Address of the network interface card that sends this message.
MAC Address is 6 bytes (48 bits), and (0～F) expression separates with colon between per 2 16 system numbers, for example: 50:78:4C:4A:F4:DA by 12 16 system numbers.MAC Address, is stored in it in hardware memory device of network interface card when producing network interface card by production firm.The production firm of the preceding 24 bit-identify network interface cards of MAC Address is obtained preceding 24 the sign difference of network interface card that different production firms produce to the IEEE application by production firm; Back 24 of MAC Address is the unduplicated network interface unit sequence number that is distributed voluntarily by production firm.The network interface card that such distribution makes any one have 48 bit mac addresses all has unique sign.
MAC Address is a kind of of LLA (Link Layer Address, link layer address), and LLA also has the address of other types.When distributing the LLA address, adopt the static method of salary distribution in the prior art,, can not produce address conflict, therefore LLA is carried out DAD (Duplicated Address Detect, address conflict detects) with regard to not needing because LLA is a static allocation.
In realizing process of the present invention, the inventor finds that the prior art of above-mentioned static allocation LLA has following shortcoming at least:
There is great potential safety hazard in the mode of static allocation link layer address, and the link layer address that obtains very easily by the personation of the assailant on the same link, makes validated user be subjected to rogue attacks or the like.Because the static allocation link layer address is not very safe, so need a kind of method of dynamic generation link layer address dynamically to generate link layer address, prevent to be palmed off by the disabled user, thus the fail safe that improves link layer address.But dynamically generate the problem that link layer address but can bring newly-generated link layer address to clash with existing link layer address, the link layer address conflict can cause the link layer address confusion, and network takes place unusual.
Summary of the invention
For the uniqueness and the link layer stability of network that guarantee link layer address, the embodiment of the invention provides a kind of method, system and node device of link layer address collision detection.Described technical scheme is as follows:
On the one hand, the embodiment of the invention provides a kind of method of link layer address collision detection, and described method comprises:
Broadcast transmission comprises the address conflict detection messages of link layer address to be detected;
Whether judgement receives the out of use address conflict message of the described link layer address of statement in the detection time of regulation;
If receive, then judge described link layer address conflict; Otherwise, judge that described link layer address does not conflict.
On the other hand, the embodiment of the invention also provides a kind of system of link layer address collision detection, and described system comprises:
Requesting node, be used for the address conflict detection messages that broadcast transmission comprises link layer address to be detected, and judge and in the detection time of regulation, whether receive the out of use address conflict message of the described link layer address of statement,, then judge described link layer address conflict if receive; Otherwise, judge that described link layer address does not conflict;
Detection node, be used to receive the address conflict detection messages that the described request node is sent, judge whether link layer address and the link layer address of oneself in the described address conflict detection messages be identical, if identical, then broadcast transmission is declared the out of use address conflict message of described link layer address; Otherwise, abandon described address conflict detection messages.
On the other hand, the embodiment of the invention provides a kind of node device, and described node device comprises:
Sending module is used for the address conflict detection messages that broadcast transmission comprises link layer address to be detected;
Judge module is used for judging the out of use address conflict message of link layer address of whether receiving that in the detection time of regulation address conflict detection messages that the described sending module of statement sends comprises, if receive, then judges described link layer address conflict; Otherwise, judge that described link layer address does not conflict.
On the other hand, the embodiment of the invention also provides a kind of node device, and described node device comprises:
Receiver module is used to receive the address conflict detection messages that comprises link layer address to be detected;
Detection module, whether the link layer address of the address conflict detection messages that is used for judging that described receiver module is received is identical with the link layer address of described node device, if identical, then broadcast transmission is declared the out of use address conflict message of described link layer address; Otherwise, abandon described address conflict detection messages.
The beneficial effect of the technical scheme that the embodiment of the invention provides is:
By broadcast transmission address conflict detection messages, judge whether to receive the out of use address conflict message of statement link layer address to be measured, can detect link layer address to be measured and whether clash, thereby avoid using the link layer address identical with existing link layer address.
Description of drawings
Fig. 1 is the flow chart of the method for the link layer address collision detection that provides of the embodiment of the invention 1;
Fig. 2 is the structure chart of the system of the link layer address collision detection that provides of the embodiment of the invention 2;
Fig. 3 is the structure chart of the node device that provides of the embodiment of the invention 4.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
In order to overcome the unsafe defective of LLA of using static allocation, the embodiment of the invention has proposed the scheme of a kind of dynamic assignment LLA, and the security related information that node Network Based provides dynamically generates the LLA address in conjunction with default algorithm.Wherein, the algorithm of security related information and default generation LLA can have multiple, but also can select to imbed in the security related information position of LLA address and mode or the like, thereby can dynamically generate the LLA address.Security related information can be the dynamic owner's of LLA address private information, as private key or the like, except that with generating the LLA address, can also be used to the LLA address is verified.Dynamically generating LLA with a network node below is that example illustrates.It is right that this network node has a public/private keys of distributing from authoritative certificate system, produces LLA according to public key information by the hash function computing, and idiographic flow is as follows: network node generates one 256 random modification value; With random modification value, 1 byte zero, PKI and spreading parameter (value of reserving for expansion algorithm) synthesize ordered series of numbers by order from left to right, use chaotic algorithm SHA-256 that this ordered series of numbers is carried out chaotic computing, get the most left 112 then, as the first chaotic value; Detect the Far Left n position (n=16 of the first chaotic value
*Safe progression, safe progression=0 ..., 7) whether be zero entirely, if not, then the random modification value is added 1, calculate the first chaotic value by above-mentioned rule again, if, being 1 filler, PKI and spreading parameter entirely to random modification value, 4 then synthesizes ordered series of numbers by from left to right order, use chaotic algorithm SHA-256 that this ordered series of numbers is carried out chaotic computing, get the most left 45 then, as the second chaotic value; With safe progression and the synthetic LLA that obtains of the second chaotic value.
The mode of above-mentioned dynamic generation LLA is compared with the mode of existing static allocation LLA, improved fail safe, but brought the problem that may clash with existing LLA simultaneously, if dynamically the LLA that generates is identical with existing LLA in the network, then produce the link layer address conflict, can cause the link layer address confusion, use two nodes of the link layer address that clashes all can not carry out normal communication, network takes place unusual.
The embodiment of the invention is by local node broadcast transmission address conflict detection messages, and whether the address conflict message that returns according to other nodes of link-local is judged the local link layer address to be detected that dynamically generates and conflicted.Link layer address collision detection scope in the embodiment of the invention is a link-local, and link layer address is meant the link layer address that adopts dynamical fashion to generate, and the technical scheme in the embodiment of the invention is applicable to various link layer protocols, has general applicability.
Embodiment 1
Referring to Fig. 1, the embodiment of the invention provides a kind of method of link layer address collision detection, specifically may further comprise the steps:
Step 101: local node A carries out the link layer address collision detection to this LLA after adopting dynamical fashion to generate LLA in advance, comprises the address conflict detection messages of this LLA to the link-local broadcast transmission.
Address conflict detection messages in the embodiment of the invention can be data message, also can be protocol massages.The form of address conflict detection messages can be defined as follows: comprise DA (Destination Address, destination address), SA (Source Address, source address), Length/Type (length/type), Tag (message attribute), Ini/Rep (type of message) and Detecting address (LLA to be measured), as shown in table 1.
Table 1
| 6?byte | 6?byte | 2?byte | 2?byte | 1?byte | 6?byte |
| DA | SA | Length/Type | Tag | Ini/Rep | Detecting?address |
Wherein, DA is the broadcast address of link-local, is the broadcast address of link-local by specifying DA, can make all nodes in the link-local all receive this message.The value of DA can be set to all bits and be 1, and the broadcast address of expression link-local also can be distributed by the normal structure registration.SA is undefined address, can be set to all bits and be form of 0 or the like.Length/Type represents that the function of this message is to be used for the link layer address collision detection, and concrete numerical value can be distributed by the normal structure registration.Tag represents the association attributes of this message, as VLan Tag, priority etc.; Ini/Rep represents the type of message, the type of message has two kinds, address conflict detection messages and address conflict message, when the value that is set to fix when this field makes Ini set, as first bit is 1, represent that then this message is the address conflict detection messages, the concrete numerical value of Ini can be distributed by the normal structure registration.Detecting address represents LLA address to be detected.
Further, can both receive the address conflict detection messages that node A sends in order to guarantee each node in the link-local, node A can comprise the address conflict detection messages of LLA to be measured according to default time interval broadcast transmission, this address conflict detection messages of broadcast transmission repeatedly, as sending once every 30 seconds, repeatedly repeat to send same address conflict detection messages, the node that situation causes having in the link-local because network is unusual etc. to prevent can not receive the address conflict detection messages.Wherein, the Yu She time interval can be set and change according to actual conditions.
Step 102: receive arbitrary Node B of address conflict detection messages on the link-local, judge whether LLA to be detected and the LLA of oneself in this address conflict detection messages be identical, if identical, then execution in step 103; Otherwise, execution in step 104.
The LLA that the LLA of Node B oneself can use for oneself also can declare the LLA that reserves for oneself.When carrying out the link layer address collision detection,, represent that also LLA to be detected produces conflict if LLA to be detected is identical with the LLA of Node B statement reservation.
Step 103: the address conflict message of Node B broadcast transmission set form in the link-local scope, declare LLA to be detected and be used, promptly produce conflict, can not be used again, execution in step 105 then.
The form of address conflict message is similar to the form of above-mentioned address detected message, and is as shown in table 1, and wherein different places is in the address conflict message, and SA represents to send the LLA of the node oneself of address conflict message; Also having in the Ini/Rep field, when the value that is set to fix makes Rep set, is 0 as first bit, represents that this message is the address conflict message, and the concrete numerical value of Rep can be distributed by the normal structure registration.
Step 104: address conflict does not take place in this moment, and Node B abandons the address conflict detection messages of receiving, does not do other processing, and execution in step 105 then.
Step 105: node A judges in the detection time of regulation whether receive the statement out of use address conflict message of LLA to be detected that other node returns, if then execution in step 106; Otherwise, execution in step 107.
If node A adopts according to the mode of broadcast transmission address conflict detection messages repeatedly of the default time interval, then be not less than the repeatedly time of broadcast transmission address conflict detection messages Gui Ding detection time.For example, the default time interval is T1, and the number of times of broadcast transmission is M time, and be T detection time, then the * T1 of T 〉=(M-1).Further, can also in detection time, reserve the stand-by period that sends behind the message, wait for other node return address conflict messages of link-local, as be T2, the * T1+T2 of T 〉=(M-1) then, be node A after M broadcast transmission address conflict detection messages, stand-by period T2 judges then.
For being arranged, a plurality of nodes initiate the situation that address conflict detects, may have of the situation generation of a plurality of node detection to the link layer address conflict, then these conflicting nodes all can send the address conflict message, because the address conflict message is a broadcast transmission, initiate arbitrary node of address conflict detection and can receive a plurality of address conflict messages, when therefore judging whether to produce address conflict according to the address conflict message of receiving, need to judge whether the out of use LLA of statement is identical with LLA own to be detected in the address conflict message, if identical, LLA then to be detected produces conflict; If different, then abandon this address conflict message; If all the LLA with own to be measured is different for the out of use LLA of statement in a plurality of address conflict messages of receiving, show that then LLA to be measured does not produce conflict.
For example, A, B, four nodes of C, D are arranged in the network, node A and Node B are carried out address conflict to the own LLA that dynamically generates respectively and are detected, if the LLA of node C and node A LLA to be detected conflicts, the LLA of node D and Node B LLA to be detected conflicts, then node C and node D distinguish broadcast transmission address conflict message, at this moment node A and Node B all can be received two address conflict messages, therefore need to judge that the out of use LLA of statement in the address conflict message of receiving is whether identical with this node LLA to be detected, if identical, this LLA to be detected conflict; If different, then abandon this address conflict message.
Step 106: node A judges that the LLA that dynamically generates produces conflict, shows that this LLA address is used, and stops testing process, and node A can regenerate a new LLA further, initiates the link layer address collision detection once more.
Step 107: this moment node A or do not receive the address conflict message that other node returns, received that perhaps the address conflict message does not still wherein comprise LLA to be detected, therefore node A judges the not conflict of LLA that dynamically generates, and can use this LLA address, finishes then.
Further, can also comprise following step in the said method:
The node A that initiates the address conflict detection stops to send the address conflict detection messages and stops wait, and abandon the follow-up address conflict message of receiving after determining address conflict.Because node A repeatedly sends the address conflict detection messages in detection time, for the situation that has the LLA conflict, node A can receive a plurality of identical address conflict message that same node is sent, node A only handles the address conflict message of receiving for the first time in this case, abandons the follow-up address conflict message that receives automatically.
In the said method, because Node B broadcast transmission address conflict message, all nodes in the link-local can both receive this address conflict message, after node except that the node A that initiates the address conflict detection is received this address conflict message, automatically abandon this address conflict message, it is not handled.
Whether present embodiment is by broadcast transmission address conflict detection messages, judges whether to receive that statement can not use the address conflict message of LLA to be measured, can detect LLA to be measured and clash, thereby avoid using the link layer address identical with existing LLA.The destination address that is provided with in address conflict detection messages and the address conflict message is the broadcast address of link-local, can make all nodes in the link-local all receive this message.Repeatedly broadcast transmission address conflict detection messages can improve the success rate that other nodes are received this address.Abandon the follow-up address conflict message of receiving after judging the link layer address conflict, can avoid repeating judging, the resource of waste local node.
Embodiment 2
Referring to Fig. 2, the embodiment of the invention provides a kind of system of link layer address collision detection, specifically comprises:
Requesting node, be used for the address conflict detection messages that broadcast transmission comprises link layer address to be detected, and judge and in the detection time of regulation, whether receive the out of use address conflict message of link layer address that statement is to be detected,, then judge link layer address conflict to be detected if receive; Otherwise, judge that link layer address to be detected does not conflict;
Detection node, be used to receive the address conflict detection messages that requesting node is sent, judge whether link layer address and the link layer address of oneself in the address conflict detection messages be identical, if identical, then broadcast transmission is declared the out of use address conflict message of this link layer address; Otherwise, abandon the address conflict detection messages.
The form of address conflict detection messages and address conflict message repeats no more as described in example 1 above herein.
Wherein, requesting node can specifically comprise:
Sending module is used for comprising according to the default time interval broadcast transmission address conflict detection messages of link layer address to be detected; Wherein, the default time interval can be set and change according to actual conditions, and the number of times of broadcasting can be for once, also can be for repeatedly;
Judge module is used to judge whether receive the out of use address conflict message of link layer address that statement is to be detected in the detection time of regulation, if receive, then judge link layer address conflict to be detected; Otherwise, judge that link layer address to be detected does not conflict.
Further, requesting node can also comprise:
Discard module is used for abandoning the follow-up address conflict message that receives of requesting node after requesting node is judged the link layer address conflict.
Further, said system can also comprise:
Other nodes are used for abandoning the address conflict message after receiving the address conflict message that detection node is sent.
Present embodiment is by requesting node broadcast transmission address conflict detection messages, judge whether the address conflict message that comprises LLA to be measured of receiving that detection node is returned, can detect LLA to be measured and whether clash, thereby avoid using the link layer address identical with existing LLA.The destination address that is provided with in address conflict detection messages and the address conflict message is the broadcast address of link-local, can make all nodes in the link-local all receive this message.Sending module is broadcast transmission address conflict detection messages repeatedly, can improve the success rate that other nodes are received this address.Discard module abandons the follow-up address conflict message of receiving after judging the link layer address conflict, can avoid repeating judging the resource of waste local node.
Embodiment 3
The embodiment of the invention provides a kind of node device, and in the link layer address collision detection, as the node device of initiating link layer address collision detection request, this node device specifically comprises:
Sending module is used for the address conflict detection messages that broadcast transmission comprises link layer address to be detected;
Judge module is used for judging the out of use address conflict message of link layer address of whether receiving that in the detection time of regulation address conflict detection messages that the statement sending module sends comprises, if receive, then judges link layer address conflict to be detected; Otherwise, judge that link layer address to be detected does not conflict.Wherein, can comprise the time of wait the detection time of regulation, and as being detection time 5 minutes, the time that sending module sends the address conflict detection messages is 2 minutes, then wait for 3 minutes after judge module judge whether to receive the address conflict message.
The form of address conflict detection messages and address conflict message repeats no more as described in example 1 above herein.
Wherein, sending module can specifically comprise:
The timed sending unit is used for comprising according to the default time interval broadcast transmission address conflict detection messages of link layer address to be detected.Wherein, the default time interval can be set and change according to actual conditions, and the number of times of broadcasting can be for once, also can be for repeatedly.
Further, above-mentioned node device can also comprise:
Discard module is used for abandoning the follow-up address conflict message that receives of node device after judge module is judged the link layer address conflict.
Present embodiment is by sending module broadcast transmission address conflict detection messages, judge module judges whether to receive the address conflict message that comprises LLA to be measured, can detect LLA to be measured and whether clash, thereby avoid using the link layer address identical with existing LLA.The destination address that is provided with in address conflict detection messages and the address conflict message is the broadcast address of link-local, can make all nodes in the link-local all receive this message.The timed sending unit is broadcast transmission address conflict detection messages repeatedly, can improve the success rate that other nodes are received this address.Discard module abandons the follow-up address conflict message of receiving after judging the link layer address conflict, can avoid repeating judging the resource of waste local node.
Embodiment 4
Referring to Fig. 3, the embodiment of the invention also provides a kind of node device, and in the link layer address collision detection, as receiving the node device that carries out collision detection after the collision detection request, this node device specifically comprises:
Receiver module is used to receive the address conflict detection messages that comprises link layer address to be detected;
Detection module, whether the link layer address of the address conflict detection messages that is used for judging that receiver module is received is identical with the link layer address of node device, if identical, then broadcast transmission is declared the out of use address conflict message of link layer address to be detected; Otherwise, abandon the address conflict detection messages.
Whether whether present embodiment is identical with the LLA of node device by the LLA to be measured that detection module detects in the address conflict detection messages, can detect LLA to be measured and clash.
The embodiment of the invention can realize that corresponding software can be stored in the storage medium that can read, for example in the hard disk of computer, CD or the floppy disk by software.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. the method for a link layer address collision detection is characterized in that, described method comprises:
Broadcast transmission comprises the address conflict detection messages of link layer address to be detected;
Whether judgement receives the out of use address conflict message of the described link layer address of statement in the detection time of regulation;
If receive, then judge described link layer address conflict; Otherwise, judge that described link layer address does not conflict.
2. the method for link layer address collision detection according to claim 1 is characterized in that, the step that described broadcast transmission comprises the address conflict detection messages of link layer address to be detected is specially:
The address conflict detection messages that comprises link layer address to be detected according to default time interval broadcast transmission.
3. the method for link layer address collision detection according to claim 2 is characterized in that, is not less than the time of the described address conflict detection messages of described broadcast transmission described detection time.
4. the method for link layer address collision detection according to claim 1 is characterized in that, the destination address in described address conflict detection messages and the address conflict message is the broadcast address of link-local.
5. the method for link layer address collision detection according to claim 1 is characterized in that, the step that described broadcast transmission comprises the address conflict detection messages of link layer address to be detected also comprises afterwards:
Receive the node of described address conflict detection messages, judge whether link layer address and the link layer address of oneself in the described address conflict detection messages be identical, if identical, then broadcast transmission is declared the out of use address conflict message of described link layer address; Otherwise, abandon described address conflict detection messages.
6. the method for link layer address collision detection according to claim 5 is characterized in that, the step that described broadcast transmission is declared the out of use address conflict message of described link layer address also comprises afterwards:
After node except that the node of the described address conflict detection messages of described broadcast transmission is received described address conflict message, abandon described address conflict message.
7. the method for link layer address collision detection according to claim 1 is characterized in that, described method also comprises:
After judging described link layer address conflict, the node of the described address conflict detection messages of described broadcast transmission abandons the follow-up address conflict message that receives.
8. the system of a link layer address collision detection is characterized in that, described system comprises:
Requesting node, be used for the address conflict detection messages that broadcast transmission comprises link layer address to be detected, and judge and in the detection time of regulation, whether receive the out of use address conflict message of the described link layer address of statement,, then judge described link layer address conflict if receive; Otherwise, judge that described link layer address does not conflict;
Detection node, be used to receive the address conflict detection messages that the described request node is sent, judge whether link layer address and the link layer address of oneself in the described address conflict detection messages be identical, if identical, then broadcast transmission is declared the out of use address conflict message of described link layer address; Otherwise, abandon described address conflict detection messages.
9. the system of link layer address collision detection according to claim 8 is characterized in that, the described request node specifically comprises:
Sending module is used for comprising according to the default time interval broadcast transmission address conflict detection messages of link layer address to be detected;
Judge module is used to judge whether receive the out of use address conflict message of the described link layer address of statement in the detection time of regulation, if receive, then judge described link layer address conflict; Otherwise, judge that described link layer address does not conflict.
10. the system of link layer address collision detection according to claim 8 is characterized in that, the described request node also comprises:
Discard module is used for abandoning the follow-up address conflict message that receives of described request node after judging described link layer address conflict.
11. the system of link layer address collision detection according to claim 8 is characterized in that, described system also comprises:
Other nodes are used for abandoning described address conflict message after receiving the address conflict message that described detection node is sent.
12. a node device is characterized in that, described node device comprises:
Sending module is used for the address conflict detection messages that broadcast transmission comprises link layer address to be detected;
Judge module is used for judging the out of use address conflict message of link layer address of whether receiving that in the detection time of regulation address conflict detection messages that the described sending module of statement sends comprises, if receive, then judges described link layer address conflict; Otherwise, judge that described link layer address does not conflict.
13. node device according to claim 12 is characterized in that, described sending module specifically comprises:
The timed sending unit is used for comprising according to the default time interval broadcast transmission address conflict detection messages of link layer address to be detected.
14. node device according to claim 12 is characterized in that, described node device also comprises:
Discard module is used for abandoning the follow-up address conflict message that receives of described node device after described judge module is judged described link layer address conflict.
15. a node device is characterized in that, described node device comprises:
Receiver module is used to receive the address conflict detection messages that comprises link layer address to be detected;
Detection module, whether the link layer address of the address conflict detection messages that is used for judging that described receiver module is received is identical with the link layer address of described node device, if identical, then broadcast transmission is declared the out of use address conflict message of described link layer address; Otherwise, abandon described address conflict detection messages.
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| CNA2007101636103A CN101414892A (en) | 2007-10-16 | 2007-10-16 | Method, system and node equipment for detecting link layer address collision |
| PCT/CN2008/072550 WO2009049523A1 (en) | 2007-10-16 | 2008-09-26 | Address conflict detecting method, systerm and nodes apparatus |
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| CNA2007101636103A CN101414892A (en) | 2007-10-16 | 2007-10-16 | Method, system and node equipment for detecting link layer address collision |
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| CN102904747A (en) * | 2012-09-14 | 2013-01-30 | 华为技术有限公司 | Detection method, device and system of server-side equipment universally unique identifier (UUID) in digital living network alliance (DLNA) |
| CN104793576A (en) * | 2014-01-21 | 2015-07-22 | 宝山钢铁股份有限公司 | Solution method for concurrency conflicts of transmission LINK network communication |
| CN109495605A (en) * | 2018-12-20 | 2019-03-19 | 天津天地伟业信息系统集成有限公司 | A kind of Mac collision detection method based on ARP |
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| KR20040065643A (en) * | 2003-01-15 | 2004-07-23 | 삼성전자주식회사 | Method for performing automatic registration of IP address and IP domain name in IP protocol version 6 |
| CN1288881C (en) * | 2004-10-18 | 2006-12-06 | 中国科学院计算技术研究所 | Address automatic distributing method in mobile self organizing network |
| CN1767545B (en) * | 2004-10-27 | 2010-06-16 | 中兴通讯股份有限公司 | Method for obtaining device MAC address |
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2008
- 2008-09-26 WO PCT/CN2008/072550 patent/WO2009049523A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904747A (en) * | 2012-09-14 | 2013-01-30 | 华为技术有限公司 | Detection method, device and system of server-side equipment universally unique identifier (UUID) in digital living network alliance (DLNA) |
| CN104793576A (en) * | 2014-01-21 | 2015-07-22 | 宝山钢铁股份有限公司 | Solution method for concurrency conflicts of transmission LINK network communication |
| CN104793576B (en) * | 2014-01-21 | 2017-06-23 | 宝山钢铁股份有限公司 | A kind of concurrency conflict solution of transmission LINK network communications |
| CN109495605A (en) * | 2018-12-20 | 2019-03-19 | 天津天地伟业信息系统集成有限公司 | A kind of Mac collision detection method based on ARP |
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| Publication number | Publication date |
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| WO2009049523A1 (en) | 2009-04-23 |
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Application publication date: 20090422 |