CN101047618B - Method and system for acquiring network route information - Google Patents

Method and system for acquiring network route information Download PDF

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Publication number
CN101047618B
CN101047618B CN2006100668085A CN200610066808A CN101047618B CN 101047618 B CN101047618 B CN 101047618B CN 2006100668085 A CN2006100668085 A CN 2006100668085A CN 200610066808 A CN200610066808 A CN 200610066808A CN 101047618 B CN101047618 B CN 101047618B
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message
forwarding unit
network
access
information
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CN101047618A (en
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欧阳伟龙
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

A method for obtaining network path information includes adding device identification information of retransmission device in message path into message according to preset order in transmission process of message sent to network edge device, sequence-analyzing out identification of each retransmission device and link information of switching said message in said retransmission device for integrating out path information of said network. The system used for realizing said method is also disclosed.

Description

Obtain the method and system of network route information
Technical field
The present invention relates to the information technology of communication network, relate in particular to the method and system that obtains network route information in communication network.
Background technology
At present, the International Standards Organization such as ETSI (ETSI) and standardization department of international telecommunication union telecommunication (ITU-T) proposes all that Next Generation Telecommunication Networks is structured in IP or packet switching is online.Along with the development of technology, provide the technological trend of unification of three nets day by day to manifest on IP network.But the design original intention of IP network is only the interconnection problems that solves the equipment that is positioned at different places, has great opening.Because it has opening, so the IP network technology is able to the significant progress that obtained during the decade short, substantially spread to family, and become indispensable part in people's daily life and work.But, also because it is open and only provide the ability of interconnection, cause IP network can't guarantee the service quality of business and the safety of customer access network.
Traditional public switch telephone network (PSTN) has passed through the continuous evolution of decades, just develop into the multiple services networks such as collection intelligent network, Digital Data Net (DDN), because PSTN is closed system, so it safe and reliable service quality that possesses has obtained public knowledge widely.But, due to itself technical problem, make PSTN that broadband service can't be provided as IP network.
The problem that present Next Generation Telecommunication Networks faces is to provide the reliable service quality as PSTN, and last " one kilometer " of puzzlement broadband development is that Access Network is also same presence service quality problems.
Various and have larger convergence ratio due to the technology of Access Network, realize that problem that at first reliable service quality will solve is the network topological information of how collecting with leading subscriber, and collect based on this topological structure of Access Network.Fig. 1 is a kind of topological interface schematic diagram of Access Network.Referring to Fig. 1, the message that the subscriber equipment of user network (UE) sends enters into two layers of convergence-level through Layer 2 switch (LSW), optical network unit (ONU) and the digital service circuit cut-in convergent equipment (DSLAM) of access network, forward through three layers of Softswitch (L3Switch), entering into afterwards three-layer network, is that resource acceptance control system (RACS) is processed by IP edge device (IP Edge) again.
Present digital service circuit forum (DSL forum) is for the user port orientation problem on the Access Network DSLAM that solves the IP first line of a couplet, adopt extended dynamic host configuration (DHCP) option 82 or PPPoE Custom Attributes (0X0105) to carry the reporting port information of user on DSLAM to IPEdge (BRAS), thereby distinguish the VLAN of share of access network or the different user of port, prevent account embezzlement.
But therefore such scheme can only collect VLAN or the port information of Access Network owing to only there being DLSAM could add above-mentioned user's port information, can't collect and manage detailed network route information, more can't collect detailed network topological information.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of obtaining network route information, can realize the detailed network route information collected, fully to ensure on this basis the service quality of network.
Another object of the present invention is to provide a kind of system that obtains network route information, collect detailed network route information with realization, and fully ensure on this basis the service quality of network.
In order to realize the foregoing invention purpose, main technical schemes of the present invention is:
A kind of method of obtaining network route information, the method comprises:
In the transmitting procedure of the message of issuing network edge device, message by way of the forwarding unit link information that equipment of itself identification information and/or this message accessed this forwarding unit add in this message according to predetermined order, wherein, described message is the message that Client-initiated user's message or the network equipment are initiated, and described message forwards successively by each forwarding unit in network;
After described message arrived network edge device, described network edge device order from described message parsed the link information that each forwarding unit sign and this message access this forwarding unit, was combined into the network route information of this message.
Preferably, described method further comprises: according to a plurality of message institute that initiates by different initiators
Preferably, described method further comprises: a plurality of heterogeneous networks routing informations that obtain according to a plurality of messages of initiating by different initiators build topology of networks.
Preferably, described method further comprises: described forwarding unit further parses the equipment identification information that adds to the latest in this message after receiving message, judge that according to this equipment identification information whether this equipment directly be connected with the link that this forwarding unit accesses this message, the link information that if it is identification information and this message of this forwarding unit is accessed this forwarding unit adds in this message and forwards according to predetermined order; Otherwise, described add to the latest in this message equipment identification information and or link information be set to invalid or abandon described message and report.
Preferably, described message is the message that Client-initiated user's message or the network equipment are initiated.
Described method also can further comprise: described forwarding unit is when E-Packeting, and binding minute book forwarding unit sign, this message access the link information of this forwarding unit and message initiator's sign; If the access link access that the message of receiving in the subsequent communications process is not bound from the initiator of this message is judged that this message access is illegal, and is triggered the process of processing invalid packet of carrying out.
Described message can be the address assignment protocol massages.And described method further comprises: described address assignment protocol massages sends to the network connexon NASS of system, after being authenticated by NASS, be message initiator distributing IP address, and device identification and the link information of described IP address and described IP application IP addresses message institute approach network path sent to resource acceptance control system RACS, be message initiator allocation of network resources by RACS according to the occupation condition of described network path.
The address above mentioned distributorship agreement is: the Neighbor Discovery Protocol of DHCP, PPPoE or IPv6, and described equipment identification information and or the link information of described message access forwarding unit be added in the scaling option or attribute of Neighbor Discovery Protocol.
Described message also can be message identifying, Spanning-Tree Protocol or link discovery protocol massages.
Described message can be the Client-initiated message, and in described network, the forwarding unit of access user message is followed successively by Layer 2 switch, optical network unit, digital service circuit cut-in convergent equipment and three layers of Softswitch.
Preferably, the link information of described message access forwarding unit comprises: this message accesses port numbers and the vlan information of this forwarding unit.
a kind of system that obtains network route information, comprise and be used for the forwarding unit that access E-Packets in communication network, this system also comprises: add module, be arranged on described forwarding unit, be used for when the forwarding unit access sends to the message of network edge device, the link information that sign and the described message of local forwarding unit accessed this forwarding unit adds in described this message according to predetermined order, wherein, described message is the message that Client-initiated user's message or the network equipment are initiated, and described message forwards successively by each forwarding unit in network, also comprise the network route information generation module, be used for after described message arrives network edge device, order parses the link information of each forwarding unit sign and this this forwarding unit of access from this message, is combined into the network route information of this message.
Preferably, this system further comprises: the network topology structure generation module, and for the network route information structure topology of networks of the message that different initiator initiates that is combined into according to described network route information generation module.
Preferably, this system further comprises judge module, be arranged on described forwarding unit, be used for parsing the equipment identification information that adds the latest this message to after described forwarding unit is being received message, judge that according to this equipment identification information whether this equipment directly be connected with the link that this forwarding unit accesses this message, if it is trigger described interpolation module the link information that identification information and the described message of this forwarding unit accesses this forwarding unit is added in message and forwards according to predetermined order; Otherwise described equipment identification information and/or the link information that adds to the latest in this message is set to invalid or abandons described message and report.
Described message can be the message of Client-initiated user's message or network equipment initiation.
This system further comprises the first safe handling module, is arranged on described forwarding unit, records described message for binding and accesses the link information of this forwarding unit and message initiator's sign; Also comprise the second safe handling module, be connected with described the first safe handling module, being used for the access link whether message that binding recorded information according to described the first safe handling module judge that forwarding unit is received bind from this message initiator accesses, if judged not from the access link access of binding the access of judging this message for illegal, and trigger forwarding unit and carry out the processing invalid packet.
Described message can be the address assignment protocol massages.And this system further comprises: NASS and RACS, NASS also is used to message initiator distributing IP address, and device identification and the link information of the message institute approach network path of described IP address and application IP address sent to RACS, the occupation condition that RACS is used for according to described this network path is message initiator allocation of network resources.
Preferably, described message can be message identifying, Spanning-Tree Protocol or link discovery protocol massages.
Preferably, described message is the Client-initiated user's message, and in described network, the described forwarding unit of this user's message of access forwarding is followed successively by Layer 2 switch, optical network unit, digital service circuit cut-in convergent equipment and three layers of Softswitch.
Preferably, the link information of described message access forwarding unit comprises: this message accesses port numbers and the vlan information of this forwarding unit.
Due to the present invention when each forwarding unit E-Packets (for example in the process of application IP address, in the process that perhaps user authenticates, perhaps carry out in the process of link discovery) add network topological information in message, be the sign of forwarding unit and port numbers and the link information of this message access, and the network route information of composition message, therefore can realize collecting detailed network route information, and fully ensure on this basis the service quality of network.
By collecting a plurality of network route informations, can also build on this basis the topological structure of whole Access Network, thereby according to the topological structure of whole Access Network Resources allocation more reasonably, improve service quality, and for Access-Resource and Admission Control Function, service quality or the Service control of Access Network are laid a solid foundation.
And, therefore because the present invention can construct network topology structure in the process that E-Packets, reduced in the prior art complexity by manual maintaining network topology.
At last, can bind and record link information and the user ID that forwarding unit sign, user access this forwarding unit due to forwarding unit of the present invention; In the subsequent communications process in case the message of finding access not from the access link access corresponding to user ID of this message of recording, judge that this message access is illegal, and carry out illegally and process, direct dropping packets for example, so just can do at forwarding units at different levels the binding relationship of device identification, user ID and user's access link, therefore can prevent that user ID (for example MAC Address) is stolen, can thoroughly guarantee user's safety access.
Description of drawings
Fig. 1 is a kind of topological interface schematic diagram of Access Network;
Fig. 2 is the schematic diagram of scaling option in address assignment agreement of the present invention;
Fig. 3 is the schematic diagram that the present invention obtains network route information;
Fig. 4 is a kind of structural representation that obtains the system of network route information of the present invention.
Embodiment
Below by specific embodiments and the drawings, the present invention is described in further details.
Core technology scheme of the present invention is: in the transmitting procedure of the message of issuing network edge device, message by way of forwarding unit with the equipment of itself identification information and or this message link information of accessing this forwarding unit add in this message according to predetermined order; After described message arrives network edge device, sequentially parse the link information that each forwarding unit sign and this message access this forwarding unit from described message, be combined into the network route information of this message.On the basis of the network route information that obtains, the present invention also can build topology of networks according to a plurality of heterogeneous networks routing informations that a plurality of messages of initiating by different initiators obtain.More comprehensive when the equipment of initiating described message, the network route information that obtains is also abundanter, and constructed network topology structure is also more comprehensive; Equipment all in network were all initiated message to edge device, and utilized the corresponding network path of these Receive messages, with this complete network topology structure that can construct.
The message of issuing network edge device of the present invention can also can be user's message identifying for by Client-initiated station address distributorship agreement message, can be also the special link discovery message of initiating of user.Equally, the message that the described message of issuing network edge device also can be initiated for any one network equipment, for example address assignment protocol massages, message identifying, Spanning-Tree Protocol and link discovery protocol massages etc.For example described station address distributorship agreement is specifically as follows: the IP application IP addresses message of DHCP or IPv6 or address rechecking message, be perhaps the request for building link message of PPPoE, these messages are all could determine the routing information of network behind the distributing IP address.Describe the present invention as an example of Client-initiated IP application IP addresses message example in following examples.
When enforcement was of the present invention in the process of network access user IP application IP addresses message, the communication protocol that described user's message adopts was the address assignment agreement.Described address assignment agreement is: the Neighbor Discovery Protocol of DHCP, PPPoE or IPv6, and described equipment identification information and or the link information of customer access equipment be added in the scaling option (or extended attribute, this paper illustrates as an example of scaling option example) of Neighbor Discovery Protocol.Fig. 2 is the schematic diagram of scaling option in address assignment agreement of the present invention.Referring to Fig. 2, described scaling option comprise an option head, at least one sub-option or, wherein the option head comprises option and points to the pointer of last sub-option, every sub-option comprises device identification, user link information and significance bit sign thereof.
The present embodiment describes as an example of the network route information of collecting Access Network and the topology information of further collecting Access Network example.For example the forwarding unit in general Access Network comprises successively: Layer 2 switch (LSW), optical network unit (ONU), digital service circuit cut-in convergent equipment (DSLAM) and three layers of Softswitch (L3Switch).The present invention will be described as example take the topology information of collecting described Access Network for following examples.Fig. 3 is the schematic diagram that the present invention obtains network route information.Referring to Fig. 3, method of the present invention comprises:
Step 1, subscriber equipment (UE) are initiated IP application IP addresses message to network side, forward successively by each forwarding unit in access network.
Step 2, forward described IP application IP addresses message forwarding unit with the equipment of itself identification information and or user's link information of accessing this forwarding unit add in the scaling option of described IP application IP addresses message according to predetermined order, described like this IP application IP addresses message is every all can add sub-option or the attribute of one through an equipment.
Described device identification can be the signs such as mac address information, vlan information or port numbers of this equipment, and the link information that described user accesses this forwarding unit can comprise that described user's message (being IP application IP addresses messages) accesses port numbers and the vlan information of this forwarding unit.
Step 3, from UE to the network edge device forwarding units at different levels of (IP Edge) add in address assignment protocol massages (being IP application IP addresses messages) successively the equipment of itself identification information and or the user access the link information of this equipment, final IP Edge authenticates described IP application IP addresses message repeating with IP address assignment to the network connexon NASS of system and processes.
After step 4, described IP application IP addresses message arrive IP Edge, sequentially parse the link information that each forwarding unit sign and user access this forwarding unit from described IP application IP addresses message, be combined into this user's network topological information; And by NASS, the initiation user of this IP application IP addresses message is authenticated, be this user assignment IP address; Further, also the topological structure of access network can be constructed according to a plurality of heterogeneous networks routing informations that a plurality of messages of initiating by different initiators obtain, to ensure on this basis network service quality.
Step 5, NASS after the IP address assignment success with user's IP address and described user's network route information (being device identification and the link information of the network path of described IP application IP addresses message institute approach) notice to resource acceptance control system (RACS); After RACS learnt user's network topological information, secondary IP address obtained the occupation condition of user's access service network path at an easy rate, thereby can be user's allocation of network resources effectively.The topological structure of the whole access network that RACS can also be constructed according to NASS goes out is reasonably the user assignment Internet resources, ensures the service quality of network.
the scheme of optimizing as another kind of the present invention, in above-mentioned steps 2, described forwarding also can further be resolved described scaling option with the forwarding unit of scaling option IP application IP addresses message, take out the equipment identification information that adds to the latest in this IP application IP addresses message, judge that according to this equipment identification information whether this equipment directly be connected with the user link that this forwarding unit accesses this message, the link information that if it is identification information and the user of this forwarding unit is accessed this forwarding unit adds in message according to predetermined order, described add to the latest in this IP application IP addresses message equipment identification information and or link information be set to effectively, be added with valid flag, and forward this IP application IP addresses message, otherwise, described add to the latest in this IP application IP addresses message equipment identification information and or link information be set to invalid or abandon described message and report this IP application IP addresses message to network manager.By this processing, after described IP application IP addresses message finally is forwarded to NASS, NASS can be further according to checking that the effective marker that adds in described IP application IP addresses message judges whether the network equipment of user institute warp all correct, if effectively all correct, and be this user assignment IP address, and carry out subsequent operation; If invalid abandon this IP application IP addresses message.
Stolen in order to prevent up hill and dale user ID, the present invention can further comprise on the basis of such scheme: described forwarding unit is when forwarding IP application IP addresses message, binding minute book forwarding unit sign, message access the link information of this forwarding unit and message initiator's sign (being user ID herein, signs such as user's MAC Address, vlan number or IP address); If the access link access that the message that this forwarding unit is received in the subsequent communications process is not bound from the initiator of this message is judged that this message access is illegal, and is triggered the process (for example with this packet loss) of processing invalid packet of carrying out.
By above-mentioned processing, due to the present invention by device identification such as MAC Address, can know the message institute approach that sends to network edge device network path and with the relation of network topology, and forwarding units at different levels are all bound the MAC that recorded device identification, message initiator and the link information of message access forwarding unit, therefore can prevent that MAC Address is stolen, therefore more can guarantee user's safety access.
The described message of issuing network edge device of above-described embodiment is by Client-initiated IP application IP addresses message, when described message is the address assignment protocol massages of other types or during for user's message identifying or the link discovery message of initiating for the user is special or Spanning-Tree Protocol, its processing procedure is identical with above-mentioned implementation method, repeats no more.
When the described message of issuing network edge device is when being initiated by the network equipment (for example ONU), its processing procedure is also identical with above-mentioned implementation method.For example, the message of being initiated by ONU in transmitting procedure, by way of forwarding unit (for example DSLAM and L3Switch) with the equipment of itself identification information and or this message link information of accessing this forwarding unit add in this message according to predetermined order; After message arrives network edge device, sequentially parse the link information that each forwarding unit sign and this message access this forwarding unit from described message, be combined into the network route information of this message.And the network route information that further obtains according to the literary composition of transmitting messages by a plurality of different network equipments (such as LSW, ONU, DSLAM, L3Switch etc.) builds topology of networks.
The invention also discloses a kind of system that obtains network route information that implements said method.Fig. 4 is a kind of structural representation that obtains the network route information system of the present invention.Referring to Fig. 4, this system comprises the forwarding unit that E-Packets for access in communication network, for example, if the user's message that described message sends for the user, forwarding unit can be followed successively by the forwarding units such as LSW, ONU, DSLAM, L3Switch according to the access order of this user's message, the described message of message that described message can also be initiated for the network equipment can be address assignment protocol massages, message identifying, Spanning-Tree Protocol or link discovery protocol massages.Described system also comprises: add module 41, be arranged on described forwarding unit, be used for when the forwarding unit access E-Packets, the link information that sign and this message of local forwarding unit accessed this forwarding unit adds in described this message according to predetermined order; Also comprise network route information generation module 42, be used for after described message arrival network edge device is IP Edge, sequentially parse the link information that each forwarding unit sign and this message access this forwarding unit from this message, be combined into the network route information of this message.
This system also further comprises: network topology structure generation module 43 is used for the topological structure of the network route information structure access network of the message that different initiator initiates that is combined into according to described network route information generation module 42.
This system also further comprises judge module 46, be arranged on described forwarding unit, be used for parsing the equipment identification information that adds the latest this message to after described forwarding unit is being received message, judge that according to this equipment identification information whether this equipment directly be connected with the link that this forwarding unit accesses this message, if it is trigger described interpolation module 41 link information that identification information and the described message of this forwarding unit accesses this forwarding unit is added in message and forwards according to predetermined order; Otherwise, described add to the latest in this message equipment identification information and or link information be set to invalid or abandon described message and report.
Fail safe in order to ensure E-Packet (especially user's message), this system also further comprises the first safe handling module 44, be arranged on described forwarding unit, record described message for binding and access the link information of this forwarding unit and message initiator's sign; Also comprise the second safe handling module 45, be connected with described the first safe handling module 44, being used for the access link whether message that binding recorded information according to described the first safe handling module 44 judge that forwarding unit is received bind from this message initiator accesses, if the access of judging not from the access link access of binding judging this message is for illegally, and trigger forwarding unit and carry out the processing invalid packet, for example with this packet loss.
in addition, in order to process the address assignment protocol massages, also further comprise in described system: NASS and RACS, described network route information generation module 42 can be arranged in NASS, described network topology structure generation module 43 can be arranged in RACS, NASS also is used to user assignment IP address, and with described IP address, and device identification and the link information of the message institute approach network path of application IP address send to RACS, the occupation condition that RACS is used for according to described this network path is the user assignment Internet resources, the Internet resources that distribute are issued IP Edge.
The above; only for the better embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.

Claims (17)

1. a method of obtaining network route information, is characterized in that, the method comprises:
Subscriber equipment is initiated message to network edge device, and self equipment identification information is added in this message, described message forwards successively by each forwarding unit in access network, wherein, described message is Client-initiated station address distributorship agreement message, user's message identifying or link discovery message;
Described each forwarding unit is after receiving message, parse the equipment identification information that adds to the latest in this message, judge that according to this equipment identification information whether this equipment directly be connected with the link that this forwarding unit accesses this message, the link information that if it is identification information and this message of this forwarding unit is accessed this forwarding unit adds in this message and forwards according to predetermined order; Otherwise described equipment identification information and/or the link information that adds to the latest in this message is set to invalid or abandons described message and report;
After described message arrived network edge device, described network edge device order from described message parsed the link information that each forwarding unit sign and this message access this forwarding unit, was combined into the network route information of this message.
2. method according to claim 1, is characterized in that, described method further comprises: a plurality of heterogeneous networks routing informations that obtain according to a plurality of messages of initiating by different initiators build topology of networks.
3. method according to claim 1, it is characterized in that, described method further comprises: described forwarding unit is when E-Packeting, and binding minute book forwarding unit sign, this message access the link information of this forwarding unit and message initiator's sign; If the access link access that the message of receiving in the subsequent communications process is not bound from the initiator of this message is judged that this message access is illegal, and is triggered the process of processing invalid packet of carrying out.
4. method according to claim 1, is characterized in that, described message is: the address assignment protocol massages.
5. method according to claim 4, it is characterized in that, described method further comprises: described address assignment protocol massages sends to the network connexon NASS of system, after being authenticated by NASS, be message initiator distributing IP address, and device identification and the link information of described IP address and described IP application IP addresses message institute approach network path sent to resource acceptance control system RACS, be message initiator allocation of network resources by RACS according to the occupation condition of described network path.
6. method according to claim 4, it is characterized in that, described address assignment agreement is: the Neighbor Discovery Protocol of DHCP, PPPoE or IPv6, and the link information of described equipment identification information and/or described message access forwarding unit is added in the scaling option or attribute of Neighbor Discovery Protocol.
7. method according to claim 1, is characterized in that, described message is: message identifying, Spanning-Tree Protocol or link discovery protocol massages.
8. method according to claim 1, it is characterized in that, described message is the Client-initiated message, and in described network, the forwarding unit of access user message is followed successively by Layer 2 switch, optical network unit, digital service circuit cut-in convergent equipment and three layers of Softswitch.
9. method according to claim 1 and 2, is characterized in that, the link information of described message access forwarding unit comprises: this message accesses port numbers and the vlan information of this forwarding unit.
10. a system that obtains network route information, comprise being used for the forwarding unit that access E-Packets in communication network, and it is characterized in that, this system also comprises: add module and judge module, be arranged on described forwarding unit; Wherein:
Described judge module, be used for parsing the equipment identification information that adds the latest this message to after described forwarding unit is received message, judge that according to this equipment identification information whether this equipment directly be connected with the link that this forwarding unit accesses this message, if it is trigger described interpolation module the link information that sign and the described message of local forwarding unit accesses this forwarding unit is added in described this message and forwards according to predetermined order; Otherwise described equipment identification information and/or the link information that adds to the latest in this message is set to invalid or abandons described message and report; Wherein, described message is station address distributorship agreement message, user's message identifying or the link discovery message that subscriber equipment is initiated to network edge device, and described message forwards successively by each forwarding unit in network; Wherein, subscriber equipment adds the equipment of itself identification information in described message to when initiating message to network edge device;
This system also comprises the network route information generation module, is used for after described message arrives network edge device, and order parses the link information of each forwarding unit sign and this this forwarding unit of access from this message, is combined into the network route information of this message.
11. system according to claim 10, it is characterized in that, this system further comprises: the network topology structure generation module, and for the network route information structure topology of networks of the message that different initiator initiates that is combined into according to described network route information generation module.
12. system according to claim 10 is characterized in that, this system further comprises the first safe handling module, is arranged on described forwarding unit, records described message for binding and accesses the link information of this forwarding unit and message initiator's sign; Also comprise the second safe handling module, be connected with described the first safe handling module, being used for the access link whether message that binding recorded information according to described the first safe handling module judge that forwarding unit is received bind from this message initiator accesses, if judged not from the access link access of binding the access of judging this message for illegal, and trigger forwarding unit and carry out the processing invalid packet.
13. system according to claim 10 is characterized in that, described message is: the address assignment protocol massages.
14. system according to claim 13, it is characterized in that, this system further comprises: NASS and RACS, NASS also is used to message initiator distributing IP address, and device identification and the link information of the message institute approach network path of described IP address and application IP address sent to RACS, the occupation condition that RACS is used for according to described this network path is message initiator allocation of network resources.
15. according to claim 10 or 11 described systems is characterized in that, described message is: message identifying, Spanning-Tree Protocol or link discovery protocol massages.
16. according to claim 10 or 11 described systems, it is characterized in that, described message is the Client-initiated user's message, and in described network, the described forwarding unit of this user's message of access forwarding is followed successively by Layer 2 switch, optical network unit, digital service circuit cut-in convergent equipment and three layers of Softswitch.
17. according to claim 10 or 11 described systems is characterized in that, the link information of described message access forwarding unit comprises: this message accesses port numbers and the vlan information of this forwarding unit.
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