CN101047618A - Method and system for acquiring network route information - Google Patents
Method and system for acquiring network route information Download PDFInfo
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- CN101047618A CN101047618A CNA2006100668085A CN200610066808A CN101047618A CN 101047618 A CN101047618 A CN 101047618A CN A2006100668085 A CNA2006100668085 A CN A2006100668085A CN 200610066808 A CN200610066808 A CN 200610066808A CN 101047618 A CN101047618 A CN 101047618A
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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
Technical field
The present invention relates to the information gathering technology of communication network, relate in particular to the method and system that in communication network, obtains network route information.
Background technology
At present, ETSI (ETSI) and International Standards Organization such as (ITU-T) of standardization department of international telecommunication union telecommunication propose all that Next Generation Telecommunication Networks is structured in IP or packet switching is online.Along with the continuous development of technology, on IP network, provide the technological trend of unification of three nets to manifest day by day.But the design original intention of IP network only is the interconnection problems that solves the equipment that is positioned at different places, has great opening.Because it has opening,, substantially spread to family, and become indispensable part in people's daily life and the work so the IP network technology is able to the significant progress that obtained during the decade short.But, also because its opening and the ability that interconnection only is provided cause IP network can't guarantee the professional service quality and the safety of customer access network.
Traditional public switch telephone network (PSTN) has passed through the continuous evolution of decades, just develop into collection intelligent network, Digital Data Net multiple services networks such as (DDN), because PSTN is a closed system, so it safe and reliable service quality that possesses has obtained public widely knowledge.But,, make PSTN to provide broadband service as IP network owing to itself technical problem.
The problem that present Next Generation Telecommunication Networks is faced provides the reliable service quality as PSTN, and last " one kilometer " of the development of puzzlement broadband is that Access Network also is to have service quality problem equally.
Because the technology of Access Network is various and have bigger convergence ratio, realizes that problem that reliable service quality at first will solve is the network topological information of how collecting with leading subscriber, and collect the topological structure of Access Network based on this.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, (L3 Switch) transmits through three layers of Softswitch, entering into three-layer network afterwards again, is that resource acceptance control system (RACS) is handled by IP edge device (IP Edge).
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 and give IPEdge (BRAS), thereby distinguish the VLAN of share of access network or the different user of port, prevent account embezzlement.
But such scheme is owing to only there is DLSAM could add above-mentioned user's port information, so can only collect the VLAN or the port information of Access Network, 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 the service quality of network on this basis.
Another object of the present invention is to provide a kind of system that obtains network route information, collect detailed network route information, and fully ensure the service quality of network on this basis with realization.
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, this method comprises:
In the transmission course 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 inserting this forwarding unit add in this message according to predetermined order;
After described message arrives network edge device, from described message, parse the link information that each forwarding unit sign and this message insert this forwarding unit in proper order, be combined into the network route information of this message.
Preferably, described method further comprises: according to the topological structure of a plurality of heterogeneous networks routing information building networks that a plurality of message obtained of initiating by different initiators.
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 link to each other with the link that this forwarding unit inserts this message, if then the link information that identification information and this message of this forwarding unit inserted this forwarding unit adds in this message according to predetermined order and transmits; 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 the 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 insert link information of this forwarding unit and message initiator's sign; If the message of receiving in the subsequent communications process does not insert from the access link that the initiator bound of this message, it is illegal to judge that then this message inserts, and triggers the process of handling 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 authenticating by NASS, be message initiator distributing IP address, and the 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.
Above-mentioned address assignment agreement is: the Neighbor Discovery Protocol of DHCP, PPPoE or IPv6, and described equipment identification information and or the described message link information that inserts 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 the forwarding unit of access user's message is followed successively by Layer 2 switch, optical network unit, digital service circuit cut-in convergent equipment and three layers of Softswitch in the described network.
Preferably, the link information of described message access forwarding unit comprises: this message inserts the port numbers and the vlan information of this forwarding unit.
A kind of system that obtains network route information, comprise and be used to insert the forwarding unit that E-Packets in the communication network, this system also comprises: add module, be arranged on the described forwarding unit, be used for inserting when sending to the message of network edge device at forwarding unit, the link information that the sign and the described message of local forwarding unit inserted this forwarding unit adds in described this message according to the order of being scheduled to; Also comprise the network route information generation module, be used for after described message arrives network edge device that order parses the link information of each forwarding unit sign and this this forwarding unit of access from this message, be combined into the network route information of this message.
Preferably, this system further comprises: the network topology structure generation module is used for the topological structure of the network route information building network 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 the described forwarding unit, be used for after described forwarding unit is being received message, parsing the equipment identification information that adds this message the latest to, judge that according to this equipment identification information whether this equipment directly link to each other with the link that this forwarding unit inserts this message, add in the message according to predetermined order and transmit if then trigger link information that described interpolation module inserts this forwarding unit with the identification information and the described message of this forwarding unit; 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.
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 the described forwarding unit, is used to bind the described message of record and inserts link information of this forwarding unit and message initiator's sign; Also comprise the second safe handling module, link to each other with the described first safe handling module, be used for judging that according to the binding recorded information of the described first safe handling module access link whether message that forwarding unit receives is bound from this message initiator inserts, if judgement inserts from the access link of being bound then judges that the access of this message is illegal, and triggers the forwarding unit execution and handle 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 the 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 a 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 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 in the described network.
Preferably, the link information of described message access forwarding unit comprises: this message inserts the port numbers and the vlan information of this forwarding unit.
Since the present invention when each forwarding unit E-Packets (for example in the process of application IP address, perhaps in the process of authentification of user, perhaps carry out in the process of link discovery) in message, add network topological information, be the sign of forwarding unit and port numbers and the link information that this message inserts, and the network route information of composition message, therefore can realize collecting detailed network route information, and fully ensure the service quality of network on this basis.
By collecting a plurality of network route informations, can also make up the topological structure of whole Access Network on this basis, thereby according to the topological structure of whole Access Network Resources allocation more reasonably, improve service quality, and the service quality or the professional control of Access Network are laid a solid foundation for Access-Resource and Admission Control Function.
And, because the present invention can construct network topology structure in the process that E-Packets, therefore reduced in the prior art complexity by manual maintaining network topology.
At last, because forwarding unit of the present invention can be bound link information and the user ID that the record forwarding unit identifies, the user inserts this forwarding unit; In the subsequent communications process in case the message that find to insert do not insert from the access link of the user ID correspondence of this message of being write down, it is illegal to judge that then this message inserts, and carry out illegally and handle, for example direct dropping packets, so just can do the binding relationship of device identification, user ID and user's access link at forwarding units at different levels, therefore can prevent that user ID (for example MAC Address) is stolen, can guarantee thoroughly that user's safety inserts.
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 the address assignment agreement of the present invention;
Fig. 3 obtains the schematic diagram of network route information for the present invention;
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 transmission course 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 inserting this forwarding unit add in this message according to predetermined order; After described message arrives network edge device, from described message, parse the link information that each forwarding unit sign and this message insert this forwarding unit in proper order, 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 be according to the topological structure of a plurality of heterogeneous networks routing information building networks that a plurality of message obtained of initiating by different initiators.Comprehensive more when the equipment of initiating described message, then the network route information that is obtained is also abundant more, and constructed network topology structure is also comprehensive more; Equipment all in network were all initiated message to edge device, and utilized these messages to obtain corresponding network path, then with this whole network topological structure that can construct.
The message of issuing network edge device of the present invention can also can be the authentification of user message for by Client-initiated station address distributorship agreement message, also can be 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 or the like.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, perhaps be the request for building link message of PPPoE, these messages all are the routing informations that could determine network behind the distributing IP address.Be that example describes the present invention with Client-initiated IP application IP addresses message 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 adopted 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 is the example explanation with the scaling option) of Neighbor Discovery Protocol.Fig. 2 is the schematic diagram of scaling option in the address assignment agreement of the present invention.Referring to Fig. 2, comprise in the described scaling option option head, at least one sub-option or, wherein the option head comprises option and points to the pointer of last sub-option, each sub-option comprises device identification, user link information and significance bit sign thereof.
Present embodiment is that example describes with the network route information of collecting Access Network and the topology information of further collecting Access Network.Forwarding unit in for example 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).Following examples are that the present invention will be described for example with the topology information of collecting described Access Network.Fig. 3 obtains the schematic diagram of network route information for the present invention.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, transmit successively by each forwarding unit in the access network.
Step 2, transmit described IP application IP addresses message forwarding equipment with the equipment of itself identification information and or user's link information of inserting this forwarding unit add in the scaling option of described IP application IP addresses message the every sub-option or the attribute that all can add through an equipment of described like this IP application IP addresses message to according to predetermined order.
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 inserts this forwarding unit can comprise that described user's message (being IP application IP addresses messages) inserts the 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) in address assignment protocol massages (being IP application IP addresses messages), add successively the equipment of itself identification information and or the user insert the link information of this equipment, final IP Edge is transmitted to the network connexon NASS of system with described IP application IP addresses message and authenticates with IP address assignment and handle.
After step 4, described IP application IP addresses message arrive IP Edge, from described IP application IP addresses message, parse the link information that each forwarding unit sign and user insert this forwarding unit in proper order, 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's distributing IP address; Further, also can construct the topological structure of access network according to a plurality of heterogeneous networks routing informations that a plurality of message obtained of initiating, to ensure network service quality on this basis by different initiators.
Step 5, NASS are notified to resource acceptance control system (RACS) with user's IP address and described user's network route information (being the device identification and the link information of the network path of described IP application IP addresses message institute approach) after the IP address assignment success; After RACS learnt user's network topological information, secondary IP address obtained the occupation condition in user capture business network path at an easy rate, thereby can be user's allocation of network resources effectively.RACS can also reasonably be user's allocation of network resources according to the topological structure of the constructed whole access network that goes out of NASS, ensures the service quality of network.
As the scheme of another kind of the present invention than optimization, in above-mentioned steps 2, described forwarding has scaling option IP application IP addresses message forwarding equipment also can further resolve described scaling option, 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 link to each other with the user link that this forwarding unit inserts this message, if then the link information that the identification information and the user of this forwarding unit inserted this forwarding unit adds in the 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 transmit 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 further judge according to the effective marker that adds in the described IP application IP addresses message of inspection whether the network equipment of user institute warp is all correct, if effectively then all correct, and be this user's distributing IP address, and carry out subsequent operation; If it is invalid then abandon this IP application IP addresses message.
Stolen in order to prevent user ID up hill and dale, the present invention can further comprise on the basis of such scheme: described forwarding unit is when transmitting IP application IP addresses message, binding minute book forwarding unit sign, message insert link information of this forwarding unit and message initiator's sign (being user ID, for example signs such as user's MAC Address, vlan number or IP address herein); If the message that this forwarding unit is received in the subsequent communications process does not insert from the access link that the initiator bound of this message, it is illegal to judge that then this message inserts, and triggers the process (for example with this packet loss) of handling invalid packet of carrying out.
By above-mentioned processing, because the present invention is 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 link information that the MAC that write down device identification, message initiator and message insert forwarding unit, therefore can prevent that MAC Address is stolen, can guarantee more that therefore user's safety inserts.
The described message of issuing network edge device of the foregoing description is by Client-initiated IP application IP addresses message, when described message is the address assignment protocol massages of other types or during for authentification of user message or 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 initiating by ONU in transmission course, by way of forwarding unit (for example DSLAM and L3Switch) with the equipment of itself identification information and or this message link information of inserting this forwarding unit add in this message according to predetermined order; After message arrives network edge device, from described message, parse the link information that each forwarding unit sign and this message insert this forwarding unit in proper order, be combined into the network route information of this message.And further according to the topological structure of the civilian network route information building network that is obtained of transmitting messages by a plurality of different network equipments (for example LSW, ONU, DSLAM, L3Switch etc.).
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 and is used to insert the forwarding unit that E-Packets in the communication network, for example, if the user's message that described message sends for the user, then forwarding unit can be followed successively by 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 the described forwarding unit, be used for inserting when E-Packeting at forwarding unit, the link information that sign and this message of local forwarding unit inserted 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, order parses the link information that each forwarding unit sign and this message insert this forwarding unit from this message, is combined into the network route information of this message.
This system also further comprises: network topology structure generation module 43, the network route information that is used for the message that different initiator initiates that is combined into according to described network route information generation module 42 makes up the topological structure of access network.
This system also further comprises judge module 46, be arranged on the described forwarding unit, be used for after described forwarding unit is being received message, parsing the equipment identification information that adds this message the latest to, judge that according to this equipment identification information whether this equipment directly link to each other with the link that this forwarding unit inserts this message, add in the message according to predetermined order and transmit if then trigger link information that described interpolation module 41 inserts this forwarding unit with the identification information and the described message of this forwarding unit; 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 the described forwarding unit, be used to bind the described message of record and insert link information of this forwarding unit and message initiator's sign; Also comprise the second safe handling module 45, link to each other with the described first safe handling module 44, be used for judging that according to the binding recorded information of the described first safe handling module 44 access link whether message that forwarding unit receives is bound from this message initiator inserts, if judgement inserts from the access link of being bound then judges that the access of this message is illegal, and trigger forwarding unit and carry out the processing invalid packet, for example with this packet loss.
In addition, in order to handle the address assignment protocol massages, also further comprise in the described system: NASS and RACS, described network route information generation module 42 can be arranged among the NASS, described network topology structure generation module 43 can be arranged among the RACS, NASS also is used to user's distributing IP address, and with described IP address, and the 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 user's allocation of network resources, and the Internet resources that distribute are issued IP Edge.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and 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 all should be encompassed within protection scope of the present invention.
Claims (21)
1, a kind of method of obtaining network route information is characterized in that, this method comprises:
In the transmission course 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 inserting this forwarding unit add in this message according to predetermined order;
After described message arrives network edge device, from described message, parse the link information that each forwarding unit sign and this message insert this forwarding unit in proper order, be combined into the network route information of this message.
2, method according to claim 1 is characterized in that, described method further comprises: according to the topological structure of a plurality of heterogeneous networks routing information building networks that a plurality of message obtained of initiating by different initiators.
3, method according to claim 1, it is characterized in that, 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 link to each other with the link that this forwarding unit inserts this message, if then the link information that identification information and this message of this forwarding unit inserted this forwarding unit adds in this message according to predetermined order and transmits; 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.
According to each described method of claim 1 to 3, it is characterized in that 4, described message is the message that the Client-initiated user's message or the network equipment are initiated.
5, method according to claim 4, 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 insert link information of this forwarding unit and message initiator's sign; If the message of receiving in the subsequent communications process does not insert from the access link that the initiator bound of this message, it is illegal to judge that then this message inserts, and triggers the process of handling invalid packet of carrying out.
6, method according to claim 4 is characterized in that, described message is: the address assignment protocol massages.
7, method according to claim 6, it is characterized in that, described method further comprises: described address assignment protocol massages sends to the network connexon NASS of system, after authenticating by NASS, be message initiator distributing IP address, and the 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.
8, method according to claim 6, it is characterized in that, described address assignment agreement is: the Neighbor Discovery Protocol of DHCP, PPPoE or IPv6, and described equipment identification information and or the described message link information that inserts forwarding unit be added in the scaling option or attribute of Neighbor Discovery Protocol.
9, method according to claim 4 is characterized in that, described message is: message identifying, Spanning-Tree Protocol or link discovery protocol massages.
10, method according to claim 4, it is characterized in that, described message is the Client-initiated message, and the forwarding unit of access user's message is followed successively by Layer 2 switch, optical network unit, digital service circuit cut-in convergent equipment and three layers of Softswitch in the described network.
According to each described method of claim 1 to 3, it is characterized in that 11, the link information that described message inserts forwarding unit comprises: this message inserts the port numbers and the vlan information of this forwarding unit.
12, a kind of system that obtains network route information, comprise and be used to insert the forwarding unit that E-Packets in the communication network, it is characterized in that, this system also comprises: add module, be arranged on the described forwarding unit, be used for inserting when sending to the message of network edge device at forwarding unit, the link information that the sign and the described message of local forwarding unit inserted this forwarding unit adds in described this message according to the order of being scheduled to; Also comprise the network route information generation module, be used for after described message arrives network edge device that order parses the link information of each forwarding unit sign and this this forwarding unit of access from this message, be combined into the network route information of this message.
13, system according to claim 12, it is characterized in that, this system further comprises: the network topology structure generation module is used for the topological structure of the network route information building network of the message that different initiator initiates that is combined into according to described network route information generation module.
14, system according to claim 12, it is characterized in that, this system further comprises judge module, be arranged on the described forwarding unit, be used for after described forwarding unit is being received message, parsing the equipment identification information that adds this message the latest to, judge that according to this equipment identification information whether this equipment directly link to each other with the link that this forwarding unit inserts this message, add in the message according to predetermined order and transmit if then trigger link information that described interpolation module inserts this forwarding unit with the identification information and the described message of this forwarding unit; 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.
According to each described system of claim 12 to 14, it is characterized in that 15, described message is the message that the Client-initiated user's message or the network equipment are initiated.
16, system according to claim 15 is characterized in that, this system further comprises the first safe handling module, is arranged on the described forwarding unit, is used to bind the described message of record and inserts link information of this forwarding unit and message initiator's sign; Also comprise the second safe handling module, link to each other with the described first safe handling module, be used for judging that according to the binding recorded information of the described first safe handling module access link whether message that forwarding unit receives is bound from this message initiator inserts, if judgement inserts from the access link of being bound then judges that the access of this message is illegal, and triggers the forwarding unit execution and handle invalid packet.
17, system according to claim 15 is characterized in that, described message is: the address assignment protocol massages.
18, system according to claim 17, it is characterized in that, this system further comprises: NASS and RACS, NASS also is used to message initiator distributing IP address, and the 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 a message initiator allocation of network resources.
19, according to each described system of claim 12 to 14, it is characterized in that described message is: message identifying, Spanning-Tree Protocol or link discovery protocol massages.
20, according to each described system of claim 12 to 14, it is characterized in that, described message is the Client-initiated user's message, and 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 in the described network.
According to each described system of claim 12 to 14, it is characterized in that 21, the link information that described message inserts forwarding unit comprises: this message inserts the port numbers and the vlan information of this forwarding unit.
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| CN102098278A (en) * | 2009-12-15 | 2011-06-15 | 华为技术有限公司 | Subscriber access method and system as well as access server and device |
| CN102201963A (en) * | 2010-03-22 | 2011-09-28 | 杭州华三通信技术有限公司 | Media access control-forced forwarding method and functional unit |
| CN102546090A (en) * | 2010-12-27 | 2012-07-04 | 财团法人工业技术研究院 | Digital information encoding method, digital information decoding method, information transmission device, and information management device |
| CN102724107A (en) * | 2011-03-31 | 2012-10-10 | 百度在线网络技术（北京）有限公司 | Method for forwarding message and selecting message forwarding device, device and equipment |
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| US5732086A (en) * | 1995-09-21 | 1998-03-24 | International Business Machines Corporation | System and method for determining the topology of a reconfigurable multi-nodal network |
| ITMI20010900A1 (en) * | 2001-04-30 | 2002-10-30 | Marconi Comm Spa | TELECOMMUNICATIONS NETWORK WITH AUTOMATIC TOPOLOGY DETECTION AND METHOD FOR THIS DETECTION |
| CN1145319C (en) * | 2001-08-01 | 2004-04-07 | 华为技术有限公司 | Search method of network topological structure |
| CN1238991C (en) * | 2002-03-28 | 2006-01-25 | 华为技术有限公司 | Network topology information acquisition method |
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