CN101883090A - Client access method, equipment and system - Google Patents
Client access method, equipment and system Download PDFInfo
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- CN101883090A CN101883090A CN2010101596625A CN201010159662A CN101883090A CN 101883090 A CN101883090 A CN 101883090A CN 2010101596625 A CN2010101596625 A CN 2010101596625A CN 201010159662 A CN201010159662 A CN 201010159662A CN 101883090 A CN101883090 A CN 101883090A
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Abstract
The invention discloses a client access method, equipment and a system. The method comprises the following steps that: DHCP snooping equipment receives a message transmitted by a client through network trunk equipment and learns the MAC address of the client from the message; the DHCP snooping equipment uses the learned MAC address and the access port identifier of the client to match with locally stored binding relationship information; when the learned MAC address and the access port identifier of the client are not matched with the binding relationship information, a notice for reassigning an IP address for the client is transmitted to a DHCP server; when the DHCP server inquires that the IP address is assigned to the client, a process for reassigning the IP address to the client is initiated; and in the process that the DHCP snooping equipment reassigns the IP address to the client, the binding relationship information containing the MAC address and the access port identifier of the client is generated. The invention ensures that the client can use the reassigned IP address to normally communicate with the DHCP snooping equipment through the network trunk equipment.
Description
Technical field
The present invention relates to network communication field, relate in particular to a kind of cut-in method, equipment and system of client.
Background technology
(Dynamic Host Configuration Protocol, DHCP) monitor (DHCP Snooping) technology is the security feature of DHCP to DHCP, filters fly-by-night DHCP information by foundation and maintaining DHCP Snooping binding list item.
In the DHCP V6 environment, the typical network topology relation of DHCP Snooping comprises client, DHCP Snooping equipment and Dynamic Host Configuration Protocol server as shown in Figure 1.The IP address of IPv6 address that client is obtained and Dynamic Host Configuration Protocol server is at the same network segment, DHCP Snooping equipment is by being provided with the upper united mouth for trusting (trust) port, the back message using of Dynamic Host Configuration Protocol server is monitored and filtered, if receiving, DHCPSnooping equipment the DHCPv6 Server back message using of coming in to abandon this message from non-trusted port.After client is successfully obtained the IPv6 address from Dynamic Host Configuration Protocol server, DHCP Snooping equipment can be at the port that client connected, generate a binding list item that comprises port numbers, IPv6 address, MAC Address, Virtual Local Area Network sign and lease time etc., the message that only allows IPv6 address, source and source MAC to meet binding list item passes through the port that this client connected, and abandon the message that does not meet binding list item, guarantee that the client of legal acquisition IPv6 address can access network.
The above-mentioned security feature of DHCP Snooping equipment, when increasing network security, some problems have also been brought, the example of network topology as shown in Figure 2, client by network trunk equipment for example hub link to each other with DHCP Snooping equipment, and communicate by letter with outside Dynamic Host Configuration Protocol server with DHCP Snooping equipment by hub.After client successfully gets access to the IPv6 address from Dynamic Host Configuration Protocol server, if hub changes with the port that DHCP Snooping equipment links to each other, for example change when linking Port2 and going up from Port1 shown in Figure 2, client can't perception DHCP Snooping equipment and hub between the variation of annexation, therefore DHCP Snooping equipment also just can't generate corresponding binding for the port Port2 that changes after connecting, at this moment, even though client has got access to legal IPv6 address from Dynamic Host Configuration Protocol server, but because DHCP Snooping equipment does not have to generate corresponding binding for the port that changes after connecting, the legal message that client is sent can be abandoned by DHCP Snooping equipment, makes client can not use this IP address normally to carry out network service.
Summary of the invention
The invention provides a kind of cut-in method, equipment and system of client, get access under the situation of IP address from Dynamic Host Configuration Protocol server by network trunk equipment connection DHCP Snooping equipment in order to solve the client that exists in the prior art, when the port that connects this network trunk equipment on the DHCP Snooping equipment changed, client can not be used the Dynamic Host Configuration Protocol server problem of the normal access network of IP address allocated.
The cut-in method of a kind of client provided by the invention comprises:
The DHCP audiomonitor receives the message that client sends through described network trunk equipment, the media access control MAC address of this client of study from described message;
The MAC Address that described DHCP audiomonitor will be learnt and the access port identifier of described client, the user binding relation information of storing with this locality mates;
When described DHCP audiomonitor does not match corresponding binding relationship information, send the notice of redistributing the IP address for described client to Dynamic Host Configuration Protocol server;
Described DHCP audiomonitor is that client is redistributed in the flow process of IP address at described Dynamic Host Configuration Protocol server, generates the binding relationship information of the access port identifier that comprises described MAC Address and described client; Described Dynamic Host Configuration Protocol server be client redistribute the IP address flow process by Dynamic Host Configuration Protocol server according to described notice, inquired when distributing the IP address for this client and triggered.
The embodiment of the invention provides a kind of cut-in method of client, comprising:
What receive the transmission of DHCP audiomonitor is the notice that described client is redistributed the IP address, described notice is described DHCP audiomonitor when receiving client through message that described network trunk equipment sends, learn the MAC Address of described client, with the MAC Address learnt and the access port identifier of described client, mate with local stored binding relationship information, and when not matching binding relationship information, send;
According to described notice, whether inquiry distributed the IP address for this client;
When Query Result when being, be initiated as the flow process that described client is redistributed the IP address.
A kind of dynamic host configuration protocol DHCP audiomonitor that the embodiment of the invention provides comprises:
Media access control MAC address learning unit is used to receive client when message that described network trunk equipment sends, the MAC Address of this client of study from described message;
Matching unit is used to use the MAC Address of learning, the access port identifier of described client, and the user binding relation information of storing with this locality mates;
Notification unit is used for giving notice to Dynamic Host Configuration Protocol server when not matching corresponding binding relationship information; Described notice is used to inform that described Dynamic Host Configuration Protocol server when distributing the IP address for described client, is initiated as the flow process that described client is redistributed the IP address;
The binding relationship information generation unit is used for redistributing the flow process of IP address described for client, generates the binding relationship information of the access port identifier that comprises described MAC Address and described client.
A kind of Dynamic Host Configuration Protocol server that the embodiment of the invention provides comprises:
The notice receiving element is used to receive that the DHCP audiomonitor sends redistributes the notice of IP address for described client;
Query unit is used for according to described notice, and whether inquiry distributed the IP address for this client;
The IP address assignment unit, be used for when Query Result when being, be initiated as the flow process that described client is redistributed the IP address.
A kind of client connecting system that the embodiment of the invention provides comprises: dynamic host configuration protocol DHCP audiomonitor and Dynamic Host Configuration Protocol server;
Described DHCP audiomonitor is used to receive the message that client sends through described network trunk equipment, the media access control MAC address of this client of study from described message; With the MAC Address learnt and the access port identifier of described client, mate with local stored binding relationship information; And when not matching binding relationship information, send the notice of redistributing the IP address for described client to Dynamic Host Configuration Protocol server; And redistributing for client in the flow process of IP address, generate the binding relationship information of the access port identifier that comprises described MAC Address and described client;
Described Dynamic Host Configuration Protocol server is used for according to described notice, and whether inquiry distributed the IP address for this client, if be initiated as the flow process that described client is redistributed the IP address.
The beneficial effect of the embodiment of the invention comprises:
The cut-in method of the client that the embodiment of the invention provides, equipment and system, client is communicated by letter with Dynamic Host Configuration Protocol server with the DHCP audiomonitor by network trunk equipment, after the port that connects network trunk equipment on the DHCP audiomonitor changes, the DHCP audiomonitor when receiving client through message that network trunk equipment sends, the MAC Address of this client of study from message; With the access port identifier of the MAC Address learnt and this client, mate with local stored binding relationship information, when not matching corresponding binding relationship information, send the notice of redistributing the IP address for this client to Dynamic Host Configuration Protocol server; Dynamic Host Configuration Protocol server is according to notice, distributing under the situation of IP address for this client, be initiated as this client and redistribute the flow process of IP address, the DHCP audiomonitor is that client is redistributed in the flow process of IP address at Dynamic Host Configuration Protocol server, generation comprises the binding relationship information of the access port identifier of this client mac address and this client, through after the above-mentioned flow process, client has regained the IP address, and also set up the binding relationship information of the port numbers after this client mac address and the change in the DHCP audiomonitor, the IP address that makes client to use to redistribute is via network trunk equipment and the proper communication of DHCP audiomonitor, when the port of having avoided existing in the prior art when connecting network trunk equipment on the DHCP Snooping equipment changed, client can not be used the Dynamic Host Configuration Protocol server problem of the normal access network of IP address allocated.
Description of drawings
One of typical network topology graph of a relation of DHCP Snooping that Fig. 1 provides for prior art;
Two of the typical network topology graph of a relation of DHCP Snooping that Fig. 2 provides for prior art;
The flow chart of the method that the client that Fig. 3 provides for the embodiment of the invention inserts;
The Dynamic Host Configuration Protocol server that Fig. 4 provides for the embodiment of the invention is initiated as the flow chart that client is redistributed the IP address;
The internal structure schematic diagram of the DHCP audiomonitor that Fig. 5 provides for the embodiment of the invention;
The internal structure schematic diagram of the Dynamic Host Configuration Protocol server that Fig. 6 provides for the embodiment of the invention;
The cut-away view of the IP address assignment unit that Fig. 7 provides for the embodiment of the invention;
The structure chart of the client connecting system that Fig. 8 provides for the embodiment of the invention.
Embodiment
The embodiment of method, equipment and the system of the access of a kind of client that the embodiment of the invention is provided below in conjunction with accompanying drawing is described in detail.
In the cut-in method of the client that the embodiment of the invention provides, connect by network trunk equipment under DHCP Snooping equipment got access to the IP address from Dynamic Host Configuration Protocol server the situation (network topological diagram as shown in Figure 2) in client, when the port that connects network trunk equipment on the DHCP Snooping equipment changes, carry out flow process as shown in Figure 3, this flow process comprises the steps:
S301, DHCP monitor (DHCP Snooping) equipment and receive the message that client sends through network trunk equipment, medium access control (Media Access Control, the MAC) address of this client of study from this message;
S302, DHCP audiomonitor use the MAC Address of learning, the access port identifier of this client, mate with local stored binding relationship information (for example binding list item); When the match is successful, carry out following step S307, if the match is successful, turn to and carry out following step S303;
S303, DHCP audiomonitor send to Dynamic Host Configuration Protocol server and are the notice of client distributing IP address again;
Whether the notice that S304, Dynamic Host Configuration Protocol server send according to the DHCP audiomonitor, inquiry distributed the IP address for this client, if, carry out following step S305, otherwise, following step S307 carried out;
S305, Dynamic Host Configuration Protocol server are initiated as the flow process that client is redistributed the IP address;
S306, DHCP audiomonitor are being redistributed for client in the flow process of IP address, generate the binding relationship information of the access port identifier that comprises MAC Address and client; Turn to then and carry out S307;
S307, process ends.
Below each step in the above-mentioned flow process is described in detail.
Among the above-mentioned steps S302, the DHCP audiomonitor uses the MAC Address of learning, the access port identifier of this client on this DHCP audiomonitor (just client is connected to port on the DHCP audiomonitor by network trunk equipment), with local stored binding relationship information (binding list item for example, can certainly be other forms of binding relationship information) process of mating, promptly in the local stored binding relationship information of DHCP audiomonitor, search the process of the binding relationship information that whether has identical MAC Address and port-mark, the DHCP audiomonitor can also use the MAC Address of learning, the local stored binding relationship information of multinomial information such as the access port identifier of this client and VLAN ID and DHCP audiomonitor is mated on this DHCP audiomonitor, and detailed process and aforementioned process are similar.
Among the above-mentioned steps S303, the DHCP audiomonitor can send the notice message that carries this client mac address to Dynamic Host Configuration Protocol server, among the above-mentioned steps S304, Dynamic Host Configuration Protocol server is according to the MAC Address in this notice message, and whether inquiry once distributed the IP address for this client.
Dynamic Host Configuration Protocol server is initiated as the flow process that client is redistributed the IP address among the above-mentioned steps S305, as shown in Figure 4, specifically comprises the steps:
S401, Dynamic Host Configuration Protocol server send to this client notifies it to apply for the message of IP address again;
Among this step S401, Dynamic Host Configuration Protocol server can use existing this client of DHCP RECONFIGURE message notifying to apply for the IP address again, also can use self-defining other messages to notify, and the embodiment of the invention does not limit this.
S402, Dynamic Host Configuration Protocol server receive that this client initiates in please the IP address message;
The message of the application IP address that client is initiated is identical with the message of client application IP address in the prior art, does not repeat them here.
S403, Dynamic Host Configuration Protocol server are redistributed the IP address for this client, and IP address allocated are back to this client by the DHCP audiomonitor.
Step S306 among Fig. 3 can carry out in the process of carrying out above-mentioned steps S403, in step S306, the DHCP audiomonitor obtains IP address and the affiliated VLAN ID of client that Dynamic Host Configuration Protocol server is redistributed for this client, generation comprises for example binding list item and the storage of binding relationship information of access port identifier, MAC Address, the IP address of redistributing and the VLAN ID of client, so that client can use the IP address of redistributing to send message via the port after changing.
Based on same inventive concept, the embodiment of the invention also provides a kind of DHCP audiomonitor, Dynamic Host Configuration Protocol server and client connecting system, because the principle that this equipment, server and system deal with problems is similar to aforementioned a kind of user end inserting method, therefore the enforcement of this equipment, server and system can repeat part and repeat no more referring to the enforcement of method.
The DHCP audiomonitor that the embodiment of the invention provides as shown in Figure 5, comprising:
Media access control MAC address learning unit 501 is used to receive client when message that network trunk equipment sends, the MAC Address of this client of study from this message;
Matching unit 502 is used to use the MAC Address of learning, the access port identifier of client, and the user binding relation information of storing with this locality mates;
Notification unit 503 is used for when not matching corresponding binding relationship information, the notice Dynamic Host Configuration Protocol server; This notice is used to inform that Dynamic Host Configuration Protocol server when distributing the IP address for client, is initiated as the flow process that this client is redistributed the IP address;
Binding relationship information generation unit 504, being used at Dynamic Host Configuration Protocol server is the flow process that client is redistributed the IP address, generates the binding relationship information of the access port identifier that comprises MAC Address and client.
Above-mentioned binding relationship information generation unit 504 is further used for redistributing in the process of IP address for this client at Dynamic Host Configuration Protocol server, obtains the sign of VLAN under the IP address redistributed and this client; The binding list item and the storage of the sign of VLAN under the IP address that generation comprises the MAC Address of access port identifier, the client of client, redistribute for this client and this client.
The Dynamic Host Configuration Protocol server that the embodiment of the invention provides as shown in Figure 6, comprising:
Notice receiving element 601 is used to receive that the DHCP audiomonitor sends redistributes the notice of IP address for described client;
Preferably, above-mentioned notice receiving element 601 carries the MAC Address of this client in above-mentioned notice;
Above-mentioned notice can be the DHCP audiomonitor when receiving client through message that network trunk equipment sends, learn the MAC Address of this client, access port identifier with the MAC Address learnt and this client, mate with local stored binding relationship information, and when not matching the binding binding relationship information, send.
Preferably, query unit 602 is utilized the MAC Address of the client in this notice, and whether inquiry distributed the address for this client;
IP address assignment unit 603, be used for when Query Result when being, be initiated as the flow process that this client is redistributed the IP address.
Above-mentioned IP allocation unit 603 as shown in Figure 7, specifically comprises:
Receive subelement 6032, be used to receive the message of the application IP address that this client initiates;
The above-mentioned Dynamic Host Configuration Protocol server that the embodiment of the invention provides and the above-mentioned functions of DHCP audiomonitor, can perhaps adopt the improved procedure of software and hardware combination to realize by the Dynamic Host Configuration Protocol server of prior art and the software of DHCP audiomonitor are improved realization.
A kind of client connecting system that the embodiment of the invention provides, as shown in Figure 8, same as the prior art is that this system comprises DHCP audiomonitor 801 and Dynamic Host Configuration Protocol server 802; DHCP audiomonitor 801 links to each other with client by network trunk equipment, and the embodiment of the invention has been done following improvement respectively to DHCP audiomonitor 801 and Dynamic Host Configuration Protocol server 802:
Described DHCP audiomonitor 801 is used to receive the message that client sends through network trunk equipment, the media access control MAC address of this client of study from message; With the MAC Address learnt and the access port identifier of described client, mate with local stored binding relationship information; And when not matching binding relationship information, send the notice of redistributing the IP address for this client to Dynamic Host Configuration Protocol server 802; And redistributing for client in the flow process of IP address, generate the binding relationship information of the access port identifier that comprises this MAC Address and client;
Dynamic Host Configuration Protocol server 802 is used for the notice that sends according to DHCP audiomonitor 801, and whether inquiry distributed the IP address for this client, if be initiated as the flow process that this client is redistributed the IP address.
Further, the DHCP audiomonitor 801 in the said system is further used for sending to Dynamic Host Configuration Protocol server 802 the notice message of the MAC Address that carries client;
Dynamic Host Configuration Protocol server 802 is further used for according to the MAC Address of notice in the message, and whether inquiry distributed the IP address for this client.
Further, the Dynamic Host Configuration Protocol server 802 in the said system is further used for notifying it to apply for the message of IP address again to the client transmission; Receive the message of the application IP address of this client initiation; For described client is redistributed the IP address, and IP address allocated is back to this client by the DHCP audiomonitor.
The cut-in method of the client that the embodiment of the invention provides, equipment and system, client is communicated by letter with Dynamic Host Configuration Protocol server with the DHCP audiomonitor by network trunk equipment, after the port that connects network trunk equipment on the DHCP audiomonitor changes, the DHCP audiomonitor when receiving client through message that network trunk equipment sends, the MAC Address of this client of study from message; With the access port identifier of the MAC Address learnt and this client, mate with local stored binding relationship information, when not matching corresponding binding relationship information, send the notice of redistributing the IP address for this client to Dynamic Host Configuration Protocol server; Dynamic Host Configuration Protocol server is according to notice, distributing under the situation of IP address for this client, be initiated as this client and redistribute the flow process of IP address, the DHCP audiomonitor is that client is redistributed in the flow process of IP address at Dynamic Host Configuration Protocol server, generation comprises the binding relationship information of the access port identifier of this client mac address and this client, through after the above-mentioned flow process, client has regained the IP address, and also set up the binding relationship information of the port numbers after this client mac address and the change in the DHCP audiomonitor, the IP address that makes client to use to redistribute is via network trunk equipment and the proper communication of DHCP audiomonitor, when the port of having avoided existing in the prior art when connecting network trunk equipment on the DHCP Snooping equipment changed, client can not be used the Dynamic Host Configuration Protocol server problem of the normal access network of IP address allocated.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (14)
1. the cut-in method of a client is characterized in that, comprising:
The DHCP audiomonitor receives the message that client sends, the media access control MAC address of this client of study from described message;
The MAC Address that described DHCP audiomonitor will be learnt and the access port identifier of described client are mated with local stored binding relationship information;
When described DHCP audiomonitor does not match corresponding binding relationship information, send the notice of redistributing the IP address for described client to Dynamic Host Configuration Protocol server;
Described DHCP audiomonitor is that client is redistributed in the flow process of IP address at described Dynamic Host Configuration Protocol server, generates the binding relationship information of the access port identifier that comprises described MAC Address and described client; Described Dynamic Host Configuration Protocol server be client redistribute the IP address flow process by Dynamic Host Configuration Protocol server according to described notice, inquired when distributing the IP address for this client and triggered.
2. the method for claim 1 is characterized in that, the DHCP audiomonitor sends the notice of redistributing the IP address for described client to Dynamic Host Configuration Protocol server, comprising:
What the DHCP audiomonitor sent the MAC Address that carries described client to described Dynamic Host Configuration Protocol server redistributes the notice message of IP address for described client.
3. the method for claim 1 is characterized in that, described DHCP audiomonitor generates the binding relationship information of the access port identifier that comprises described MAC Address and described client, comprising:
Described DHCP audiomonitor obtains the sign that described Dynamic Host Configuration Protocol server is a VLAN under the IP address redistributed of described client and the described client;
Described DHCP audiomonitor generates the binding list item and the storage of the sign that comprises the access port identifier of described client, described MAC Address, the described IP address of redistributing and described VLAN.
4. the cut-in method of a client is characterized in that, comprising:
What receive the transmission of DHCP audiomonitor is the notice that described client is redistributed the IP address, described notice is described DHCP audiomonitor when receiving client through message that described network trunk equipment sends, learn the MAC Address of described client, with the MAC Address learnt and the access port identifier of described client, mate with the user binding relation information of this locality storage, and when not matching binding relationship information, send;
According to described notice, whether inquiry distributed the IP address for this client;
When Query Result when being, be initiated as the flow process that described client is redistributed the IP address.
5. method as claimed in claim 4 is characterized in that, whether Dynamic Host Configuration Protocol server distributed the IP address for this client by following manner inquiry:
Described Dynamic Host Configuration Protocol server is according to the described MAC Address of carrying in the described notice, and whether inquiry distributed the IP address for this client.
6. method as claimed in claim 4 is characterized in that, Dynamic Host Configuration Protocol server is initiated as the flow process that described client is redistributed the IP address, comprising:
Described Dynamic Host Configuration Protocol server sends to described client notifies it to apply for the message of IP address again;
Described Dynamic Host Configuration Protocol server receives the message of the application IP address of described client initiation;
Described Dynamic Host Configuration Protocol server is that described client is redistributed the IP address, and IP address allocated is back to described client by described DHCP audiomonitor.
7. method as claimed in claim 6 is characterized in that, described Dynamic Host Configuration Protocol server sends to described client notifies it to apply for the message of IP address again, comprising:
Described Dynamic Host Configuration Protocol server sends the described client of DHCP RECONFIGURE message notifying to described client and applies for the IP address again.
8. a dynamic host configuration protocol DHCP audiomonitor is characterized in that, comprising:
Media access control MAC address learning unit is used to receive client when message that described network trunk equipment sends, the MAC Address of this client of study from described message;
Matching unit is used to use the MAC Address of learning, the access port identifier of described client, and the user binding relation information of storing with this locality mates;
Notification unit is used for giving notice to Dynamic Host Configuration Protocol server when not matching corresponding binding relationship information; Described notice is used to inform that described Dynamic Host Configuration Protocol server when distributing the IP address for described client, is initiated as the flow process that described client is redistributed the IP address;
The binding relationship information generation unit is used for redistributing the flow process of IP address described for client, generates the binding relationship information of the access port identifier that comprises described MAC Address and described client.
9. equipment as claimed in claim 8 is characterized in that, described binding relationship information generation unit is further used for obtaining described Dynamic Host Configuration Protocol server and is the sign of VLAN under IP address that described client redistributes and the described client; Generation comprises the binding list item and the storage of the sign of the access port identifier of described client, described MAC Address, the described IP address of redistributing and described VLAN.
10. a Dynamic Host Configuration Protocol server is characterized in that, comprising:
The notice receiving element is used to receive that the DHCP audiomonitor sends redistributes the notice of IP address for described client;
Query unit is used for according to described notice, and whether inquiry distributed the IP address for this client;
The IP address assignment unit, be used for when Query Result when being, be initiated as the flow process that described client is redistributed the IP address.
11. server as claimed in claim 10 is characterized in that, described IP address assignment unit specifically comprises:
The notice subelement is used for notifying it to apply for the message of IP address again to described client transmission;
Receive subelement, be used to receive the message of the application IP address that described client initiates;
The address assignment subelement is used to described client to redistribute the IP address, and IP address allocated is back to described client by described DHCP audiomonitor.
12. a client connecting system comprises: dynamic host configuration protocol DHCP audiomonitor and Dynamic Host Configuration Protocol server is characterized in that:
Described DHCP audiomonitor is used to receive the message that client sends through described network trunk equipment, the media access control MAC address of this client of study from described message; With the MAC Address learnt and the access port identifier of described client, mate with local stored binding relationship information; And when not matching binding relationship information, send the notice of redistributing the IP address for described client to Dynamic Host Configuration Protocol server; And redistributing for client in the flow process of IP address, generate the binding relationship information of the access port identifier that comprises described MAC Address and described client;
Described Dynamic Host Configuration Protocol server is used for according to described notice, and whether inquiry distributed the IP address for this client, if be initiated as the flow process that described client is redistributed the IP address.
13. system as claimed in claim 12 is characterized in that, described DHCP audiomonitor is further used for sending to described Dynamic Host Configuration Protocol server the notice message of the MAC Address that carries described client;
Described Dynamic Host Configuration Protocol server is further used for according to the described MAC Address in the described notice message, and whether inquiry distributed the IP address for this client.
14. system as claimed in claim 12 is characterized in that, described Dynamic Host Configuration Protocol server is further used for notifying it to apply for the message of IP address again to described client transmission; Receive the message of the application IP address of described client initiation; For described client is redistributed the IP address, and IP address allocated is back to described client by described DHCP audiomonitor.
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| CN102318322A (en) * | 2011-07-28 | 2012-01-11 | 华为技术有限公司 | Device and method for distributing MAC address |
| CN102377825A (en) * | 2011-10-26 | 2012-03-14 | 深圳市赛格导航科技股份有限公司 | System and method for uploading message |
| CN102413052A (en) * | 2011-11-30 | 2012-04-11 | 华为技术有限公司 | Network access method, device and system |
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| CN102594935A (en) * | 2012-01-20 | 2012-07-18 | 杭州华三通信技术有限公司 | Method and network equipment for distributing secondary addresses based on dynamic host configuration protocol (DHCP) access authentication |
| CN103095722A (en) * | 2013-02-01 | 2013-05-08 | 华为技术有限公司 | Method for updating network security table and network device and dynamic host configuration protocol (DHCP) server |
| CN103250392A (en) * | 2010-12-09 | 2013-08-14 | 日本电气株式会社 | Computer system, controller, and network monitoring method |
| CN103647780A (en) * | 2013-12-13 | 2014-03-19 | 华为技术有限公司 | Lawful monitoring method and network equipment |
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| CN106878483A (en) * | 2017-01-24 | 2017-06-20 | 新华三技术有限公司 | A kind of IP address distribution method and device |
| CN110071983A (en) * | 2018-01-22 | 2019-07-30 | 西安中兴新软件有限责任公司 | A kind of retransmission method and device |
| CN110995877A (en) * | 2019-11-12 | 2020-04-10 | 锐捷网络股份有限公司 | Method for automatically updating IP address, snooping equipment and DHCP server |
| CN111131545A (en) * | 2019-12-27 | 2020-05-08 | 浪潮思科网络科技有限公司 | ND Snooping binding table updating method, device and medium |
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