CN103188354A - Method and device for detecting node address conflict - Google Patents
Method and device for detecting node address conflict Download PDFInfo
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- CN103188354A CN103188354A CN201310109676XA CN201310109676A CN103188354A CN 103188354 A CN103188354 A CN 103188354A CN 201310109676X A CN201310109676X A CN 201310109676XA CN 201310109676 A CN201310109676 A CN 201310109676A CN 103188354 A CN103188354 A CN 103188354A
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Abstract
The invention discloses a method and a device for detecting node address conflict. According to the method, a second network node periodically broadcasts all ARP (address resolution protocol) messages taking each MAC (media access control) address and each IP (internet protocol) address of the second network node taken as a source address, and the second network node does not broadcast all ARP messages simultaneously; and a first network node receives the ARP messages and judges whether the source address of the ARP message is in conflict with the address of the first network node, and if so, the message about address conflict of the source address carrying the ARP message is reported to a webmaster server. Due to adoption of the method, the first network node not only can detect whether self IP address is in conflict with the IP address of the second network node, but also can detect whether self MAC address is in conflict with the MAC address of the second network node, so that the accuracy on detecting the node address conflict is improved; and the second network node does not broadcasts all the ARP messages simultaneously, so that the network transmission pressure can be reduced.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of detection method and device of node address conflict.
Background technology
Along with development of internet technology, Industrial Ethernet has been widely used in the various large and medium-sized networkings.In the transmission course of network data message; network interconnection agreement (Internet Protocol through regular meeting owing to network node; IP) (Medium Access Control, MAC) address clashes and causes message transmissions to occur unusually in address or medium access control.
Yet, in the prior art, when whether conflict the address of detecting each network node, what be primarily aimed at is the IP address of each network node, and whether the MAC Address of each network node is conflicted do not detect, therefore, the accuracy of detection node address conflict is lower in the prior art, has influenced the normal transmission of message.
In addition, whether when conflicting in the address of detecting each network node in the prior art, general what adopt is that the periodic method of message of carrying self IP address that sends mutually of each network node detects.Concrete, for a network node, may there be a plurality of IP address in it, and when preset period arrived, this network node then carried the mode of an IP address with a message, generate each message, and sent each message that generates simultaneously.This mode that sends all messages simultaneously can cause network to flood in the prior art, causes the network transmission pressure bigger.
Summary of the invention
The embodiment of the invention provides a kind of detection method and device of node address conflict, the problem lower in order to the accuracy that solves detection node address conflict in the prior art, that the network transmission pressure is bigger.
The embodiment of the invention provides a kind of detection method of node address conflict, comprising:
First network node receives the ARP message of second network node broadcasting, wherein, described second network node is when the broadcast arp message, each ARP message that periodic broadcasting is source address with medium access control MAC Address and the network interconnection protocol IP address of each virtual interface of described second network node self, and described second network node is not broadcasted all ARP messages simultaneously;
The source address that described first network node is judged described ARP message whether with the address conflict of described first network node self;
If conflict, then report the address conflict information of the source address of carrying described ARP message to NM server.
The embodiment of the invention provides a kind of checkout gear of node address conflict, comprising:
Receiver module, be used for receiving the ARP message of second network node broadcasting, wherein, described second network node is when the broadcast arp message, each ARP message that periodic broadcasting is source address with medium access control MAC Address and the network interconnection protocol IP address of each virtual interface of described second network node self, and described second network node is not broadcasted all ARP messages simultaneously;
Judge module, the source address that is used for judging described ARP message whether with self address conflict;
Reporting module is used for reporting the conflicting information of the source address of carrying described ARP message to NM server when described judge module is judged conflict.
The embodiment of the invention provides a kind of detection method and device of node address conflict, it is each ARP message of source address that this method second network node is periodically broadcasted with self each MAC Address and IP address, and second network node is not broadcasted all ARP messages simultaneously, first network node receives the ARP message of second network node broadcasting, and the source address of judging this ARP message whether with the address conflict of first network node self, if conflict, then report the address conflict information of the source address of carrying this ARP message to NM server.Pass through said method, first network node except can detect its own IP address whether with the IP address conflict of second network node, whether can also detect the MAC Address of self conflicts with the MAC Address of second network node, therefore improved the accuracy of detection node address conflict, and second network node is not broadcasted all ARP messages simultaneously, can avoid causing network to flood, reduce the network transmission pressure.
Description of drawings
The testing process that the node address that Fig. 1 provides for the embodiment of the invention conflicts;
The process of the first network node broadcast arp message that Fig. 2 provides for the embodiment of the invention;
The checkout gear structural representation that the node address that Fig. 3 provides for the embodiment of the invention conflicts.
Embodiment
The embodiment of the invention provides a kind of detection method and device of node address conflict, it is each ARP message of source address that this method second network node is periodically broadcasted with self each MAC Address and IP address, and second network node is not broadcasted all ARP messages simultaneously, first network node receives the ARP message of second network node broadcasting, and the source address of judging this ARP message whether with the address conflict of first network node self, if conflict, then report the address conflict information of the source address of carrying this ARP message to NM server.Pass through said method, first network node except can detect its own IP address whether with the IP address conflict of second network node, whether can also detect the MAC Address of self conflicts with the MAC Address of second network node, therefore improved the accuracy of detection node address conflict, and second network node is not broadcasted all ARP messages simultaneously, can avoid causing network to flood, reduce the network transmission pressure.
Below in conjunction with Figure of description, the embodiment of the invention is described in detail.
The testing process that the node address that Fig. 1 provides for the embodiment of the invention conflicts specifically may further comprise the steps:
S101: first network node receives address resolution protocol (Address Resolution Protocol, the ARP) message of second network node broadcasting.
In embodiments of the present invention, each network node in the Ethernet detects in the network and self other network nodes of address conflict based on the ARP agreement, and each network node is other network node broadcast arp messages in the network all.Wherein, the network node described in the embodiment of the invention comprises any type of network node in the Ethernet, as terminal, switch etc.
Be that example describes with first network node in the network and second network node.
Other network nodes (comprise first network node) the broadcast arp message of second network node in the network, wherein, second network node is when the broadcast arp message, each ARP message that periodic broadcasting is source address with MAC Address and the IP address of each virtual interface of this second network node self, and second network node is not broadcasted all ARP messages simultaneously.First network node then receives this ARP message of second network node broadcasting.
For example, second network node is when the ARP message of periodic two source address differences of broadcasting (source MAC or source IP address difference), can be in first cycle broadcasted first ARP message on the 1st second, second ARP message of broadcasting in the 2nd second in first cycle, then, broadcasted first ARP message again, and broadcasted second ARP message again in the 2nd second in second period, by that analogy in the 1st second in second period.Like this, for the different ARP message of these two source addresses, each ARP message is periodically to be broadcasted, but the broadcasting of each ARP message is constantly inequality.
S102: the source address of judging this ARP message whether with the address conflict of this first network node self, if, execution in step S103 then, otherwise, execution in step S104.
Wherein, the source address of this ARP message comprises source IP address and source MAC.Because this ARP message is the ARP message by the broadcasting of second network node, therefore, the source IP address of this ARP message to be exactly second network node be certain virtual interface IP address allocated of self, the source MAC of this ARP message is the MAC Address that second network node distributes for self corresponding virtual interface.
After first network node receives this ARP message, then can be according to the source address (source IP address of this ARP message and source MAC) of this ARP message, and this first network node is self each virtual interface IP address allocated and MAC Address, the source address of judging this ARP message whether with the address conflict of first network node self.
In actual applications, have a plurality of virtual interfaces in the network node, this network node can all distribute a MAC Address for each virtual interface of self, and each virtual interface for self distributes at least one IP address again.For example, there are 31 virtual interfaces in the network node, this network node can be these 31 virtual interfaces and respectively distributes a MAC Address, distribute 64 IP addresses for each virtual interface again, wherein, for being for the virtual interface, in 64 IP addresses distributing for this virtual interface, 1 IP address can be used as the main of this virtual interface and uses the IP address, and other 63 IP addresses can be used as the secondary ip address of this virtual interface.
Therefore, whether the source address that first network node is judged this ARP message is specifically as follows with the method for the address conflict of this first network node self: first network node judges whether the source MAC of this ARP message falls in the mac address range that this first network node self distributes, and judge that first network node is in self each virtual interface IP address allocated, whether there be the IP address identical with the source IP address of this ARP message, when above-mentioned at least one judged result when being, determine the source address of this ARP message and the address conflict of this first network node self, when above-mentioned judged result is not, determine not conflict in the address of the source address and this first network node self of this ARP message.
Also be, after first network node receives the ARP message of second network node broadcasting, exist at least one MAC Address identical with the source MAC of this ARP message if be defined as in the MAC Address that self each virtual interface distributes, determine that then the MAC Address of the source MAC and first network node self of this ARP message conflicts, and then can determine that the MAC Address (also i.e. the source MAC of this ARP message) of second network node conflicts with the MAC Address of first network node.If first network node is defined as existing in self each virtual interface IP address allocated at least one IP address identical with the source IP address of this ARP message, the source IP address of then determining this ARP message conflicts with the first network node its own IP address, and then can determine the IP address (also i.e. the source IP address of this ARP message) of second network node and the IP address conflict of first network node.
Determining the MAC Address of self and the source MAC of this ARP message when first network node clashes, when perhaps the source IP address of its own IP address and this ARP message clashes, can determine the source address of this ARP message and the address conflict of first network node self.Determine that when first network node MAC Address of self do not conflict with the source MAC of this ARP message, and, when its own IP address is not conflicted with the address of this ARP message yet, can determine not conflict in the address of the source address and first network node self of this ARP message.
Preferable, because network node is for after its virtual interface distributed MAC Address in actual applications, this virtual interface is not enabled also, like this, even the MAC Address of other network nodes is conflicted with the MAC Address of the virtual interface of this not enabled, also can not influence the normal transmission of message, therefore, when first network node judges that by said method whether the MAC Address of self conflicts with the source MAC of the ARP message that receives, whether can also judge in the MAC Address that enabled virtual interface distributes as each exists at least one MAC Address identical with the source MAC of this ARP message, if exist, then the MAC Address of determining self is conflicted with the source MAC of this ARP message, otherwise, determine that the MAC Address of self do not conflict with the source MAC of this ARP message.
S103: the address conflict information that reports the source address of carrying this ARP message to NM server.
When first network node determine by above-mentioned steps S102 the source address and this first network node self of this ARP message address conflict (comprise that above-mentioned MAC Address is conflicted and IP address conflict at least a) time, report the address conflict information of the source address of carrying this ARP message to NM server, make NM server know MAC Address or the IP address of conflict, NM server then can be handled first network node and second network node of MAC Address or IP address conflict according to default conflict-solving strategy, for example revises the MAC Address that clashes in first network node or second network node or IP address etc.
Preferable, determining the MAC Address of self and the source MAC of this ARP message when first network node clashes, when perhaps the source IP address of its own IP address and this ARP message clashes, obtain the precedence information of second network node that sends this ARP message, judge whether the priority of second network node of this ARP message of described transmission is higher than the priority of self, when judged result when being, first network node modification self and the source MAC of this ARP message or MAC Address or the IP address that the IP address clashes, and report the address conflict information of the source address of carrying this ARP message to NM server, wherein, comprise self amended source MAC or IP address in this address conflict information, notice NM server self has been finished the modification of self address that the source address with this ARP message is clashed; When judged result for not the time, the MAC Address that the source MAC of first network node maintenance self and this ARP message clashes is constant, perhaps first network node IP address that keeps the IP address of self and this ARP message to clash is constant, and reporting the address conflict information of the source address of carrying this ARP message to NM server, the notice NM server manages MAC Address or the IP address that clashes second network node of this ARP message of described transmission.Concrete, the address conflict information that first network node reports can be TRAP message,, reports the TRAP message of the source address of carrying this ARP message to NM server that is.When first network node judges that the MAC Address of the source MAC and first network node self of this ARP message is conflicted, can generate the TRAP message of the source IP address (i.e. the IP address of second network node) of the MAC Address of carrying conflict and this ARP message, and report NM server, follow the trail of second network node to make things convenient for NM server according to the source IP address of this ARP message.When first network node judges that the source IP address of this ARP message conflicts with the first network node its own IP address, can generate the TRAP message of the source MAC (i.e. the MAC Address of second network node) that carries conflict IP address and this ARP message, and report NM server, follow the trail of second network node to make things convenient for NM server according to the source MAC of this ARP message.
Certainly, before first network node reports address conflict information to NM server, whether the address conflict information reporting functions that can judge self earlier enables, if enable, then report, if do not enable, then do not report, whether the address conflict information reporting functions that the user can dispose first network node according to actual needs voluntarily enables.
S104: add the ARP list item according to this ARP message, and return step S101.
Do not conflict and (the MAC Address conflict do not take place in the address of determining the source address and this first network node self of this ARP message when first network node by above-mentioned steps S102, IP address conflict does not take place yet) time, then first network node can be handled this ARP message according to existing ARP consensus standard, according to this ARP message condition ARP list item, and continuation receives the ARP message of second network node broadcasting, the source address of judging the ARP message receive whether with the address conflict of first network node self, also namely, return step S101.
Pass through said method, for any one network node in the Ethernet, this network node except whether can detect self whether with other network node generation IP address conflicts, whether can also detect self conflicts with other network node generation MAC Address, therefore effectively raise the accuracy of detection node address conflict, after according to the result who detects conflict network node being handled, then can guarantee the normal transmission of subsequent packet in Ethernet.And second network node is not broadcasted all ARP messages simultaneously when the ARP message that periodically each source address of broadcasting is different, can avoid causing network to flood, and reduces the transmission pressure of network.
In embodiments of the present invention, when the MAC Address of first network node judgement self is conflicted with the source MAC of the ARP message that receives, and when its own IP address is also conflicted with the source IP address of this ARP message, illustrate that then there is grave error in current network, at this moment, even first network node will report NM server with the address conflict information that carries the source address (source MAC and the source IP address that comprise this ARP message) of this ARP message, this address conflict information also probably can not normally be sent in the NM server owing to the gross error that exists in the network, therefore, this moment, first network node can be made amendment to self MAC Address and IP address voluntarily.
Concrete, in step S102 shown in Figure 1, if first network node is judged the source MAC of the ARP message that receives and is fallen into the mac address range interior (MAC Address conflict) that this first network node self distributes, and, judge that first network node is in self each virtual interface IP address allocated, have the IP address (IP address conflict) identical with the source IP address of this ARP message, then this first network node is revised MAC Address and the IP address that self distributes.For example, first network node can be revised as the MAC Address of distributing for the virtual interface that receives this ARP message the MAC Address of other virtual interfaces when revising the MAC Address of self distributing.Consider that general MAC Address is that first network node just configures when dispatching from the factory, it also is not easy to revise, and therefore, when simultaneously MAC Address conflict and IP address conflict taking place, first network node also can only be revised its own IP address.
In embodiments of the present invention, first network node can also be safeguarded corresponding collision alert table respectively at MAC Address conflict and IP address conflict, monitors in order to the conflict time to MAC Address conflict and IP address conflict.
Concrete, first network node can be safeguarded a MAC collision alert table and an IP collision alert table with the form based on the structure chained list of snmp protocol.
When first network node judges that by above-mentioned steps S102 the source MAC of this ARP message falls in the mac address range that this first network node self distributes, before reporting address conflict information by step S103 to NM server, can also judge the source MAC that whether has this ARP message in the MAC collision alert table of self current preservation, if exist, then the alarm cleared time with the source MAC correspondence of this ARP message in this MAC collision alert table resets to the first default initial value, otherwise, the source MAC of this ARP message is write in this MAC collision alert table, and the alarm cleared time of the source MAC correspondence of this ARP message that writes first initial value that is set to preset.
When first network node is judged as the identical IP address of the source IP address that exists in self each virtual interface IP address allocated with this ARP message by above-mentioned steps S102, before reporting address conflict information by step S103 to NM server, can also judge the source IP address that whether has this ARP message in the IP collision alert table of self current preservation, if exist, then the alarm cleared time with the source IP address correspondence of this ARP message in this IP collision alert table resets to the first default initial value, otherwise, the source IP address of this ARP message is write in this IP collision alert table, and the alarm cleared time of the source IP address correspondence of this ARP message that writes first initial value that is set to preset.
In addition, for each source IP address in each source MAC and the above-mentioned IP collision alert table in the above-mentioned MAC collision alert table, first network node can be according to first setting-up time at interval, the alarm cleared time of each source MAC correspondence in this MAC collision alert table is reduced the first default step value, the alarm cleared time of each source IP address correspondence in this IP collision alert table is reduced the first default step value, and delete alarm cleared time corresponding in this MAC collision alert table less than the source MAC of this first step value, delete alarm cleared time corresponding in this IP collision alert table less than the source IP address of this first step value, report address conflict disappearance information to NM server at last, carry deleted source MAC and source IP address in this address conflict disappearance information, disappear with the notice corresponding MAC Address conflict of NM server and/or IP address conflict.
The above-mentioned first default initial value, first setting-up time interval, the first default step value all can be set as required.
For example, suppose that first initial value that will preset is 800 seconds, first setting-up time is spaced apart 10 seconds, the first default step value is 10 seconds, then when first network node judges that the MAC Address of self is conflicted with the source MAC of the ARP message that receives, judge earlier the source MAC that whether has this ARP message in the MAC collision alert table of self current preservation, if exist, then the alarm cleared time with the source MAC correspondence of this ARP message in this MAC collision alert table reset to 800 seconds, if do not exist, then the source MAC with this ARP message writes in this MAC collision alert table, and the alarm cleared time of the source MAC correspondence of this ARP message that writes is set to 800 seconds.For MAC conflict alarm meter, the first network node then per 10 seconds alarm cleared time with each source MAC correspondence in this MAC collision alert table reduces 10 seconds, and corresponding alarm cleared time then reports address conflict disappearance information to NM server less than 10 seconds source MAC after the deletion in the deletion MAC collision alert table.
Last example to be being treated to example explanation to MAC collision alert table, the processing mode of IP collision alert table is similar to above-mentioned processing mode to MAC collision alert table, just gives unnecessary details no longer one by one here.
Certainly, first network node can also generate corresponding alarm log according to above-mentioned MAC collision alert table and IP collision alert table in the embodiment of the invention, to notify user's first network node and the second network node generation address conflict in several ways.Concrete, above-mentioned method by TRAP message proactive notification NM server address conflict, can make the webmaster personnel when using NM server to carry out other operations, can find in time that also the node address in the network clashes, improve and found the ageing of node address conflict.After finding the node address conflict, the webmaster personnel then can use this NM server by setting up based on the MIB-BROWER of snmp protocol and the communicating to connect of corresponding network node, obtain and check local MAC collision alert table and the IP collision alert table of preserving of this network node, with information such as the type of determining to take place address conflict, times.In addition, by the local alarm log of preserving of network node, then can make the webmaster personnel directly determine the information such as type, time of generation address conflict by this network node (need not to pass through NM server).
In embodiments of the present invention, second network node is when the broadcast arp message, can be respectively at MAC Address and the IP address of self each virtual interface, periodically be source MAC, be that source IP address generates ARP message and broadcasting with the IP address of this virtual interface with the MAC Address of this virtual interface.For example, the cycle of supposing the broadcast arp message is set at 300 seconds, then second network node can be respectively at MAC Address and the IP address of self each virtual interface, broadcasting in per 300 seconds once is source MAC, is the ARP message of source IP address with the IP address of this virtual interface with the MAC Address of this virtual interface.
But, for a network node, often there are a plurality of virtual interfaces in this network node, for a virtual interface, can be this virtual interface and distribute a MAC Address and a plurality of IP address.Suppose to exist in this network node 31 virtual interfaces, be respectively each virtual interface and distribute a MAC Address and 64 IP addresses, then per 300 seconds (cycle of broadcast arp message) of this network node will be broadcasted 31x64 ARP message, therefore, if this 31x64 ARP message all sends when the end in 300 second cycle simultaneously, will cause network to flood, cause the network transmission pressure to increase.
Therefore, cause network to flood for fear of second network node when the broadcast arp message, reduce the network transmission pressure, second network node can be by process broadcast arp message shown in Figure 2, as shown in Figure 2.The process of the second network node broadcast arp message that Fig. 2 provides for the embodiment of the invention specifically may further comprise the steps:
S201: second network node is at MAC Address and the IP address of self each virtual interface, and the collision detection time of the MAC Address of this virtual interface and IP address correspondence is set to a random value, and this random value is not more than the second default initial value.
For example, for a virtual interface of second network node, second network node is designated as MAC1 for this virtual interface has distributed a MAC Address, for this virtual interface has distributed two IP addresses, is designated as IP1 and IP2, supposes that the second default initial value is 300 seconds, then:
Second network node is at [MAC1, IP1], and the collision detection time that [MAC1, IP1] is corresponding is set to a random value that is not more than 300 seconds, for example is 146;
Second network node is at [MAC1, IP2], and the collision detection time that [MAC1, IP2] is corresponding also is set to a random value that is not more than 300 seconds, for example is 58.
S202: according to second setting-up time at interval, with the second default step value of collision detection time decreased of MAC Address and the IP address correspondence of this virtual interface.
Continue to continue to use example, suppose that second setting-up time is spaced apart 10 seconds, the second default step value also is 10 seconds, and then second network node is every 10 seconds, collision detection time decreased that respectively will [MAC1, IP1] and [MAC1, IP2] correspondence 10 seconds.As, in the time of the 10th second, the collision detection time 146 that [MAC1, IP1] is corresponding reduces 10 seconds, is 136 seconds after the minimizing, and the collision detection time 58 that [MAC1, IP2] is corresponding reduces 10 seconds, is 48 seconds after the minimizing.By that analogy, in the time of the 50th second, the collision detection time that [MAC1, IP1] is corresponding is 96 seconds, and the collision detection time that [MAC1, IP2] is corresponding is 8 seconds.
S203: when collision detection time of the MAC Address of this virtual interface and IP address correspondence during less than default second step value, be source MAC, be that source IP address generates ARP message and broadcasting with the IP address of this virtual interface with the MAC Address of this virtual interface.
Continue to continue to use example, because in the time of the 50th second, the collision detection time that [MAC1, IP2] is corresponding is 8 seconds, and less than second step value 10 seconds, therefore, it was source MAC that second network node sends with MAC1, be ARP message and the broadcasting of source IP address with IP2.
In the time of the 140th second, the collision detection time that [MAC1, IP1] is corresponding is 6 seconds, and less than second step value 10 seconds, therefore, it was source MAC that second network node sends with MAC1, be ARP message and the broadcasting of source IP address with IP1.
After first network node receives the ARP message of second network node broadcasting, then can be based on method as shown in Figure 1, judge the broadcasting of this second network node the ARP message source address whether with the address conflict of first network node self, and carry out respective handling according to judged result.
S204: the collision detection time of the MAC Address of second this virtual interface of network node and IP address correspondence resets to the second default initial value, returns step S202.
Continue to continue to use example, in the time of the 50th second, second network node is source MAC with MAC1, is ARP message and the broadcasting of source IP address with IP2, therefore, the collision detection time that second network node [MAC1, IP2] is corresponding resets to the second default initial value, namely 300 seconds, and continue per 10 seconds (second setting-up time at interval) with the collision detection time decreased 10 seconds (the second default step value) of [MAC1, IP2] correspondence.
Similarly, in the time of the 140th second, second network node is source MAC with MAC1, is ARP message and the broadcasting of source IP address with IP1, therefore, the collision detection time that second network node [MAC1, IP1] is corresponding also resets to the second default initial value, namely 300 seconds, and continue per 10 seconds (second setting-up time at interval) with the collision detection time decreased 10 seconds (the second default step value) of [MAC1, IP1] correspondence.
Like this, in fact second network node is still with default second initial value (300 seconds) is the cycle, carry out periodically sending the ARP message, but, as above routine described, the moment that is set to random value with the collision detection time that [MAC1, IP1] and [MAC1, IP2] is corresponding is the initial moment, then sent [MAC1 at the 50th second, IP2] corresponding ARP message, sent [MAC1, IP1] corresponding ARP message on the 140th second, sent class [MAC1 at the 350th second, IP2] corresponding ARP message, sent [MAC1, IP1] corresponding ARP message on the 440th second.As seen, the 50th second transmission [MAC1 that second network node was actually in each 300 second cycle, IP2] corresponding ARP message, the 140th second transmission [MAC1 in each 300 second cycle, IP1] corresponding ARP message, just will send [MAC1, IP1] corresponding ARP message and [MAC1, IP2] transmitting time of corresponding ARP message is discrete to constantly different in 300 second cycle, therefore, adopt the periodic broadcast arp message of said method, just can avoid causing network to flood, reduce the network transmission pressure.
In addition, because in embodiments of the present invention, each network node all will be to other network node broadcast arp messages in the network, therefore first network node receives the ARP message by the broadcasting of second network node on the one hand, and adopt method as shown in Figure 1 to carry out the address conflict detection, the ARP message that also will adopt method broadcasting as shown in Figure 2 to be source address with MAC Address and the IP address of this first network node on the other hand, after second network node receives the ARP message of being broadcasted by first network node, also can adopt method as shown in Figure 1 to carry out the address conflict detection, also be, in the above-mentioned process as depicted in figs. 1 and 2 that the embodiment of the invention provides, first network node and second network node are interchangeable, just give unnecessary details no longer one by one here.
More than be the detection method of the node address conflict that provides of the embodiment of the invention, based on same invention thinking, the embodiment of the invention also provides a kind of checkout gear of node address conflict, as shown in Figure 3.The checkout gear structural representation that the node address that Fig. 3 provides for the embodiment of the invention conflicts specifically comprises:
Receiver module 301, be used for receiving the ARP message of second network node broadcasting, wherein, described second network node is when the broadcast arp message, each ARP message that periodic broadcasting is source address with medium access control MAC Address and the network interconnection protocol IP address of each virtual interface of described second network node self, and described second network node is not broadcasted all ARP messages simultaneously;
Judge module 302, the source address that is used for judging described ARP message whether with self address conflict;
Reporting module 303 is used for reporting the conflicting information of the source address of carrying described ARP message to NM server when described judge module 302 is judged conflict.
Described judge module 302 specifically is used for, whether the source MAC of judging described ARP message falls in the mac address range that self distributes, and be judged as in self each virtual interface IP address allocated, whether there be the IP address identical with the source IP address of described ARP message, when above-mentioned at least one judged result when being, determine the source address of described ARP message and the address conflict of self, when above-mentioned judged result is not, determine that the source address of described ARP message do not conflict with the address of self.
Described device also comprises:
Adjusting module 304, being used for judging the source MAC of described ARP message when described judge module 302 falls in the mac address range that self distributes, and, be judged as in self each virtual interface IP address allocated, when having the identical IP address of source IP address with described ARP message, revise MAC Address and the IP address of self distribution.
Described reporting module 303 also is used for, when described judge module 302 judges that the source MAC of described ARP message falls in the mac address range that self distributes, judge the source MAC that whether has described ARP message in the MAC collision alert table of self current preservation, if exist then the alarm cleared time with the source MAC correspondence of ARP message described in the described MAC collision alert table to reset to the first default initial value, otherwise, the source MAC of described ARP message is write in the described MAC collision alert table, and the alarm cleared time of the source MAC correspondence of the described ARP message that writes first initial value that is set to preset; When described judge module 302 is judged as the identical IP address of the source IP address that exists in self each virtual interface IP address allocated with described ARP message, judge the source IP address that whether has described ARP message in the IP collision alert table of self current preservation, if exist, then the alarm cleared time with the source IP address correspondence of ARP message described in the described IP collision alert table resets to the first default initial value, otherwise, the source IP address of described ARP message is write in the described IP collision alert table, and the alarm cleared time of the source IP address correspondence of the described ARP message that writes first initial value that is set to preset.
Described reporting module 303 also is used for, according to first setting-up time at interval, the alarm cleared time of each source MAC correspondence in the described MAC collision alert table is reduced the first default step value, the alarm cleared time of each source IP address correspondence in the described IP collision alert table is reduced the first default step value, delete alarm cleared time corresponding in the described MAC collision alert table less than the source MAC of described first step value, delete alarm cleared time corresponding in the described IP collision alert table less than the source IP address of described first step value, report address conflict disappearance information to described NM server, carry deleted source MAC and source IP address in the described address conflict disappearance information.
Described receiver module 301 specifically is used for, receive the ARP message that described second network node is broadcasted in the following ways: described second network node is at MAC Address and the IP address of self each virtual interface, the collision detection time of the MAC Address of this virtual interface and IP address correspondence is set to a random value, and described random value is not more than the second default initial value; According to second setting-up time at interval, with the second default step value of collision detection time decreased of MAC Address and the IP address correspondence of this virtual interface; When collision detection time of the MAC Address of this virtual interface and IP address correspondence during less than the described second default step value, be source MAC, be that source IP address generates ARP message and broadcasting with the IP address of this virtual interface with the MAC Address of this virtual interface; The MAC Address of this virtual interface and the collision detection time of IP address correspondence are reset to the described second default initial value, continuation according to second setting-up time at interval with the second default step value of collision detection time decreased of MAC Address and the IP address correspondence of this virtual interface, and according to the collision detection time broadcast arp message of MAC Address and the IP address correspondence of this virtual interface.
Certainly, also can comprise broadcast module (not shown among Fig. 3) in the structure of above-mentioned network node, be used for MAC Address and IP address at self each virtual interface, the collision detection time of the MAC Address of this virtual interface and IP address correspondence is set to a random value, and described random value is not more than the second default initial value; According to second setting-up time at interval, with the second default step value of collision detection time decreased of MAC Address and the IP address correspondence of this virtual interface; When collision detection time of the MAC Address of this virtual interface and IP address correspondence during less than the described second default step value, be source MAC, be that source IP address generates ARP message and broadcasting with the IP address of this virtual interface with the MAC Address of this virtual interface, after making described second network node receive the ARP message of described broadcast module broadcasting, judge the broadcasting of described broadcast module the ARP message source address whether with the address conflict of second network node self, and carry out respective handling according to judged result; The MAC Address of this virtual interface and the collision detection time of IP address correspondence are reset to the described second default initial value, continuation according to second setting-up time at interval with the second default step value of collision detection time decreased of MAC Address and the IP address correspondence of this virtual interface, and according to the collision detection time broadcast arp message of MAC Address and the IP address correspondence of this virtual interface.
Concrete above-mentioned checkout gear as shown in Figure 3 can be arranged in network node.
The embodiment of the invention provides a kind of detection method and device of node address conflict, it is each ARP message of source address that this method second network node is periodically broadcasted with self each MAC Address and IP address, and second network node is not broadcasted all ARP messages simultaneously, first network node receives the ARP message of second network node broadcasting, and the source address of judging this ARP message whether with the address conflict of first network node self, if conflict, then report the address conflict information of the source address of carrying this ARP message to NM server.Pass through said method, first network node except can detect its own IP address whether with the IP address conflict of second network node, whether can also detect the MAC Address of self conflicts with the MAC Address of second network node, therefore improved the accuracy of detection node address conflict, and second network node is not broadcasted all ARP messages simultaneously, can avoid causing network to flood, reduce the network transmission pressure.
Those skilled in the art should understand that the application's embodiment can be provided as method, system or computer program.Therefore, the application can adopt complete hardware embodiment, complete software embodiment or in conjunction with the form of the embodiment of software and hardware aspect.And the application can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The application is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the present application.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make and carry out the sequence of operations step producing computer implemented processing at computer or other programmable devices, thereby be provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable devices are carried out.
Although described the application's preferred embodiment, in a single day those skilled in the art get the basic creative concept of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the application's scope.
Obviously, those skilled in the art can carry out various changes and modification and the spirit and scope that do not break away from the application to the application.Like this, if these of the application are revised and modification belongs within the scope of the application's claim and equivalent technologies thereof, then the application also is intended to comprise these changes and modification interior.
Claims (12)
1. the detection method of a node address conflict is characterized in that, comprising:
First network node receives the ARP message of second network node broadcasting, wherein, described second network node is when the broadcast arp message, each ARP message that periodic broadcasting is source address with medium access control MAC Address and the network interconnection protocol IP address of each virtual interface of described second network node self, and described second network node is not broadcasted all ARP messages simultaneously;
The source address that described first network node is judged described ARP message whether with the address conflict of described first network node self;
If conflict, then report the address conflict information of the source address of carrying described ARP message to NM server.
2. the method for claim 1 is characterized in that, the source address of judging described ARP message whether with the address conflict of described first network node self, specifically comprise:
Whether the source MAC of judging described ARP message falls in the mac address range of described first network node self distribution, and judge whether described first network node in self each virtual interface IP address allocated, exists the IP address identical with the source IP address of described ARP message;
When above-mentioned at least one judged result when being, determine the source address of described ARP message and the address conflict of described first network node self, when above-mentioned judged result is not, determine not conflict in the address of the source address and described first network node self of described ARP message.
3. method as claimed in claim 2 is characterized in that, described method also comprises:
Judging the source MAC of described ARP message when described first network node falls in the mac address range of described first network node self distribution, and, judge that described first network node is in self each virtual interface IP address allocated, when having the identical IP address of source IP address with described ARP message, described first network node is revised MAC Address and the IP address of self distribution.
4. method as claimed in claim 2, it is characterized in that, when described first network node judges that the source MAC of described ARP message falls in the mac address range that described first network node self distributes, report to NM server before the address conflict information of the source address of carrying described ARP message, described method also comprises:
Described first network node is judged the source MAC that whether has described ARP message in the MAC collision alert table of self current preservation;
If exist, then the alarm cleared time with the source MAC correspondence of ARP message described in the described MAC collision alert table resets to the first default initial value, otherwise, the source MAC of described ARP message is write in the described MAC collision alert table, and the alarm cleared time of the source MAC correspondence of the described ARP message that writes first initial value that is set to preset;
When described first network node is judged as the identical IP address of the source IP address that exists in self each virtual interface IP address allocated with described ARP message, report to NM server before the address conflict information of the source address of carrying described ARP message, described method also comprises:
Described first network node is judged the source IP address that whether has described ARP message in the IP collision alert table of self current preservation;
If exist, then the alarm cleared time with the source IP address correspondence of ARP message described in the described IP collision alert table resets to the first default initial value, otherwise, the source IP address of described ARP message is write in the described IP collision alert table, and the alarm cleared time of the source IP address correspondence of the described ARP message that writes first initial value that is set to preset.
5. method as claimed in claim 3 is characterized in that, described method also comprises:
Described first network node according to first setting-up time at interval, the alarm cleared time of each source MAC correspondence in the described MAC collision alert table is reduced the first default step value, with the first default step value of alarm cleared time minimizing of each source IP address correspondence in the described IP collision alert table; And
Delete alarm cleared time corresponding in the described MAC collision alert table less than the source MAC of described first step value, delete alarm cleared time corresponding in the described IP collision alert table less than the source IP address of described first step value; And
Report address conflict disappearance information to described NM server, carry deleted source MAC and source IP address in the described address conflict disappearance information.
6. the method for claim 1 is characterized in that, described second network node is periodic broadcasts with the MAC Address of self each virtual interface and each ARP message that the IP address is source address, specifically comprises:
Described second network node is at MAC Address and the IP address of self each virtual interface, and the collision detection time of the MAC Address of this virtual interface and IP address correspondence is set to a random value, and described random value is not more than the second default initial value; And
According to second setting-up time at interval, with the second default step value of collision detection time decreased of MAC Address and the IP address correspondence of this virtual interface; And
When collision detection time of the MAC Address of this virtual interface and IP address correspondence during less than the described second default step value, be source MAC, be that source IP address generates ARP message and broadcasting with the IP address of this virtual interface with the MAC Address of this virtual interface;
The collision detection time of the MAC Address of described second this virtual interface of network node and IP address correspondence resets to the described second default initial value, continuation according to second setting-up time at interval with the second default step value of collision detection time decreased of MAC Address and the IP address correspondence of this virtual interface, and according to the collision detection time broadcast arp message of MAC Address and the IP address correspondence of this virtual interface.
7. the checkout gear of a node address conflict is characterized in that, comprising:
Receiver module, be used for receiving the ARP message of second network node broadcasting, wherein, described second network node is when the broadcast arp message, each ARP message that periodic broadcasting is source address with medium access control MAC Address and the network interconnection protocol IP address of each virtual interface of described second network node self, and described second network node is not broadcasted all ARP messages simultaneously;
Judge module, the source address that is used for judging described ARP message whether with self address conflict;
Reporting module is used for reporting the conflicting information of the source address of carrying described ARP message to NM server when described judge module is judged conflict.
8. device as claimed in claim 7, it is characterized in that, described judge module specifically is used for, whether the source MAC of judging described ARP message falls in the mac address range that self distributes, and be judged as in self each virtual interface IP address allocated, whether there be the IP address identical with the source IP address of described ARP message, when above-mentioned at least one judged result when being, determine the source address of described ARP message and the address conflict of self, when above-mentioned judged result is not, determine that the source address of described ARP message do not conflict with the address of self.
9. device as claimed in claim 8 is characterized in that, described device also comprises:
Adjusting module, being used for judging the source MAC of described ARP message when described judge module falls in the mac address range that self distributes, and, be judged as in self each virtual interface IP address allocated, when having the identical IP address of source IP address with described ARP message, revise MAC Address and the IP address of self distribution.
10. device as claimed in claim 8, it is characterized in that, described reporting module also is used for, when described judge module judges that the source MAC of described ARP message falls in the mac address range that self distributes, judge the source MAC that whether has described ARP message in the MAC collision alert table of self current preservation, if exist then the alarm cleared time with the source MAC correspondence of ARP message described in the described MAC collision alert table to reset to the first default initial value, otherwise, the source MAC of described ARP message is write in the described MAC collision alert table, and the alarm cleared time of the source MAC correspondence of the described ARP message that writes first initial value that is set to preset; When described judge module is judged as the identical IP address of the source IP address that exists in self each virtual interface IP address allocated with described ARP message, judge the source IP address that whether has described ARP message in the IP collision alert table of self current preservation, if exist, then the alarm cleared time with the source IP address correspondence of ARP message described in the described IP collision alert table resets to the first default initial value, otherwise, the source IP address of described ARP message is write in the described IP collision alert table, and the alarm cleared time of the source IP address correspondence of the described ARP message that writes first initial value that is set to preset.
11. device as claimed in claim 9, it is characterized in that, described reporting module also is used for, according to first setting-up time at interval, the alarm cleared time of each source MAC correspondence in the described MAC collision alert table is reduced the first default step value, the alarm cleared time of each source IP address correspondence in the described IP collision alert table is reduced the first default step value, delete alarm cleared time corresponding in the described MAC collision alert table less than the source MAC of described first step value, delete alarm cleared time corresponding in the described IP collision alert table less than the source IP address of described first step value, report address conflict disappearance information to described NM server, carry deleted source MAC and source IP address in the described address conflict disappearance information.
12. device as claimed in claim 7, it is characterized in that, described receiver module specifically is used for, receive the ARP message that described second network node is broadcasted in the following ways: described second network node is at MAC Address and the IP address of self each virtual interface, the collision detection time of the MAC Address of this virtual interface and IP address correspondence is set to a random value, and described random value is not more than the second default initial value; According to second setting-up time at interval, with the second default step value of collision detection time decreased of MAC Address and the IP address correspondence of this virtual interface; When collision detection time of the MAC Address of this virtual interface and IP address correspondence during less than the described second default step value, be source MAC, be that source IP address generates ARP message and broadcasting with the IP address of this virtual interface with the MAC Address of this virtual interface; The MAC Address of this virtual interface and the collision detection time of IP address correspondence are reset to the described second default initial value, continuation according to second setting-up time at interval with the second default step value of collision detection time decreased of MAC Address and the IP address correspondence of this virtual interface, and according to the collision detection time broadcast arp message of MAC Address and the IP address correspondence of this virtual interface.
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