CN104283837A - Traceability relation establishing method and device thereof - Google Patents
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- CN104283837A CN104283837A CN201310273493.1A CN201310273493A CN104283837A CN 104283837 A CN104283837 A CN 104283837A CN 201310273493 A CN201310273493 A CN 201310273493A CN 104283837 A CN104283837 A CN 104283837A
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- 230000003287 optical effect Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004220 aggregation Methods 0.000 abstract 3
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- 230000008520 organization Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
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Abstract
The invention discloses a traceability relation establishing method and a device thereof, wherein the traceability relation establishing method comprises the steps of: receiving a dynamic host configuration protocol (DHCP) message from a cable modem (CM) by aggregation forwarding equipment; and establishing a traceability relation between the DHCP message and the CM according to preset index information by the aggregation forwarding equipment. The traceability relation establishing method realizes an effect of interpolating relay agent information Option82 into the DHCP message which is forwarded to the aggregation forwarding equipment according to an Ethernet protocol after transmitting through a cable media converter (CMC).
Description
Technical field
The present invention relates to the communications field, to trace to the source relation establishing method and device in particular to one.
Background technology
The transmission principle of C-DOCSIS(China wired broadcasting TV and specification) system requirements relay agent should support that inserting DynamicHost arranges agreement (Dynamic Host Configuration Protocol, referred to as DHCP) relay agent information (Option82).Wherein, C-DOCSIS system specifications is defined as follows DHCP Option82: 82.1Circuit ID: the interface message receiving DHCP request message; Medium education (Media Access Control, referred to as the MAC) address of the CM corresponding to 82.2Remote ID:DHCP request message; CMTS Capability: describe wire cable media changer devices (Cable Media Converter, referred to as CMC) (wire cable media changer devices realizes (Passive Optical Network from coax network to EPON, referred to as PON) or the data converting function of Ethernet, CMC is descending by cable TV coaxial network insertion cm device, up by PON or Ethernet cut-in convergent network) ability, as the version of C-DOCSIS.
Transmission principle and specification at traditional DOCSIS(wired broadcasting TV) in system, Cable Modem Terminal System (Cable Modem Terminal Systems, referred to as CMTS) media that can be defined by DOCSIS get involved key-course (Media Access Control, referred to as MAC) frame header (Frame header) obtain message from which cable modem (Cable Modem, referred to as CM), thus the relation of tracing to the source set up between DHCP and CM, to personal computer (the Personal Computer of CM and lower extension thereof, referred to as PC), Set Top Box (Set Top Box, referred to as STB) etc., stamp correct Option82Remote ID.In order to understand foregoing description, please refer to Fig. 1, Fig. 1 is the structure composed figure of the traditional DOCSIS canonical system according to correlation technique.
In C-DOCSIS system, functional module is displaced downwardly to optical node, former CMTS is converged forwarding unit and CMC substitutes, as shown in Figure 2, Fig. 2 realizes Organization Chart according to the distributed canonical system of the C-DOCSIS of correlation technique (adding DHCP relay module on the former figure basis of C-DOCSIS system specifications) to its group-network construction.Within the system, CMC is compatible DOCSIS agreement, so CMC still can set up the relation of tracing to the source between DHCP.
But, DHCP message is by being forwarded to convergence forwarding unit by Ethernet protocol after CMC, and the MAC Frame header of DOCSIS definition has been peeled off, the MAC Frame header that therefore convergence forwarding unit cannot be defined by DOCSIS has again set up the relation of tracing to the source between DHCP.
During for DHCP message in correlation technique by being forwarded to convergence forwarding unit by Ethernet protocol after CMC, converge the problem that the forwarding unit MAC Frame header that cannot be defined by DOCSIS again sets up the relation of tracing to the source between CM under CMC and DHCP message, not yet propose effective solution at present.
Summary of the invention
The invention provides one to trace to the source relation establishing method and device, at least to solve the problem.
According to an aspect of the present invention, provide one and to trace to the source relation establishing method, comprising: converge the DynamicHost that forwarding unit receives from cable modem (CM) and agreement (DHCP) message is set; Convergence forwarding unit sets up the relation of tracing to the source between DHCP message and CM according to the index information pre-set.
Preferably, index information comprises: index value, and wherein, index value can the MAC address of unique identification CM.
Preferably, index value is CM distribution by wire cable media changer devices (CMC).
Preferably, index value is CDT label, and wherein, CDT label uses the Business Stream of Virtual Local Area Network tagged manner to the packet place of DHCP message to identify the label obtained.
Preferably, converge forwarding unit comprise following one of at least: optical line terminal (OLT), switch, router.
According to a further aspect in the invention, provide one and to trace to the source relation apparatus for establishing, be positioned at convergence forwarding unit, comprise: receiver module, agreement (DHCP) message is set for the DynamicHost received from cable modem (CM); Set up module, for setting up the relation of tracing to the source between DHCP message and CM according to the index information pre-set.
Preferably, index information comprises: index value, and wherein, index value can the MAC address of unique identification CM.
Preferably, index value is that CM distributes by CMC.
Preferably, index value is CDT label, and wherein, CDT label uses the Business Stream of Virtual Local Area Network tagged manner to the packet place of DHCP message to identify the label obtained.
Preferably, converge forwarding unit comprise following one of at least: optical line terminal (OLT), switch, router.
Pass through the present invention, adopting according to the index information that pre-sets is the mode setting up relation of tracing to the source from the DHCP message of cable modem and CM, to solve in correlation technique DHCP message by after CMC by Ethernet protocol be forwarded to converge forwarding unit time, converge the problem that the forwarding unit MAC Frame header that cannot be defined by DOCSIS again sets up the relation of tracing to the source between CM under CMC and DHCP message, reach and after by CMC, the effect converging and insert relay agent information Option82 in forwarding unit DHCP message can be forwarded to by Ethernet protocol.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structure composed figure of the traditional DOCSIS canonical system according to correlation technique;
Fig. 2 realizes Organization Chart according to the distributed canonical system of the C-DOCSIS of correlation technique (adding DHCP relay module on the former figure basis of C-DOCSIS system specifications);
Fig. 3 is the relation establishing method flow chart of tracing to the source according to the embodiment of the present invention;
Fig. 4 is the structured flowchart of relation of the tracing to the source apparatus for establishing according to the embodiment of the present invention;
Fig. 5 is the form schematic diagram of CDT label according to the preferred embodiment of the invention;
Fig. 6 be according to the preferred embodiment of the invention C-DOCSIS canonical system (adding DHCP relay module on the former figure basis of C-DOCSIS system specifications) realize Organization Chart;
Fig. 7 is that C-DOCSIS inserts Option82 flow chart by CDT label according to the preferred embodiment of the invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
The present embodiment can be applied in C-DOCSIS network system, to realize the process relay agent in C-DOCSIS network system inserting relay agent information Option82.Certainly, the present embodiment is not limited to C-DOCSIS network system.
Present embodiments provide one to trace to the source relation establishing method.Fig. 3 is the relation establishing method flow chart of tracing to the source according to the embodiment of the present invention, and as shown in Figure 3, the method mainly comprises the following steps (step S302-step S304):
Step S302, the DynamicHost that convergence forwarding unit receives from cable modem (CM) arranges agreement (DHCP) message;
Step S304, convergence forwarding unit sets up the relation of tracing to the source between DHCP message and CM according to the index information pre-set.
By above-mentioned steps, can be forwarded to by Ethernet protocol after by CMC to converge in forwarding unit DHCP message and insert relay agent information Option82.
In the present embodiment, index information can comprise: index value, and wherein, index value can the MAC address of unique identification CM.In a preferred implementation of the present embodiment, index value can be that CM distributes by CMC, that is, each index value corresponds respectively to a CM, i.e. one-to-one relationship, preferably, index value can be CDT label, wherein, CDT label uses the Business Stream of Virtual Local Area Network tagged manner to the packet place of DHCP message to identify the label obtained.
In the present embodiment, converge forwarding unit can comprise following one of at least: optical line terminal (Optical Line Terminal, referred to as OLT), switch, router.That is, can be any one in these three kinds of equipment in this convergence forwarding unit, also can be the combination of any two kinds of equipment in these three kinds of equipment, can also be the combination of three kinds of equipment.
By the relation establishing method of tracing to the source that the present embodiment provides, can solve well and converge forwarding unit needs when the MAC Frame header not having DOCSIS to define, by using the mode of CDT label to set up relation of tracing to the source between DHCP message and CM, and then achieve insert relay agent information Option82 in DHCP message.
Present embodiments provide one to trace to the source relation apparatus for establishing.Fig. 4 is the structured flowchart of relation of the tracing to the source apparatus for establishing according to the embodiment of the present invention, and this device is positioned at convergence forwarding unit, in order to realize above-mentioned relation establishing method of tracing to the source.As shown in Figure 4, this device comprises: receiver module 10 and set up module 20.Wherein, receiver module 10, arranges protocol DHCP message for the DynamicHost received from cable modem CM; Set up module 20, be connected to receiver module 10, for setting up the relation of tracing to the source between DHCP message and CM according to the index information pre-set.
In the present embodiment, index information can comprise: index value, and wherein, index value can the MAC address of unique identification CM.
In the present embodiment, index value can be that CM distributes by CMC.Preferably, index value is CDT label, and wherein, CDT label uses the Business Stream of virtual LAN VLAN tagged manner to the packet place of DHCP message to identify the label obtained.
In the present embodiment, converge forwarding unit can comprise following one of at least: optical line terminal (OLT), switch, router.
Relation of the tracing to the source apparatus for establishing provided by the present embodiment, can solve well and converge forwarding unit needs when the MAC Frame header not having DOCSIS to define, by using the mode of CDT label to set up relation of tracing to the source between DHCP message and CM, and then achieve insert relay agent information Option82 in DHCP message.
Below in conjunction with Fig. 5, Fig. 6 and Fig. 7 and preferred embodiment, the relation establishing method of tracing to the source that above-described embodiment provides is described in more details.
Before this preferred embodiment is described, first the CDT label needing in following description to use suitably to be introduced: C-DOCSIS protocol definition CDT(C-DOCSIS TAG) label, wherein, CDT refers to the Business Stream identifying the packet place be classified by the method for VLAN label, and form is (Fig. 5 is the form schematic diagram of CDT label according to the preferred embodiment of the invention) as shown in Figure 5.
Please refer to Fig. 6, Fig. 6 be according to the preferred embodiment of the invention C-DOCSIS canonical system (adding DHCP relay module on the former figure basis of C-DOCSIS system specifications) realize Organization Chart.This preferred embodiment with the system architecture shown in Fig. 6 for hardware foundation realizes.
In the preferred embodiment, C-DOCSIS agreement is defined in up direction, and in Fig. 6, radio frequency interface module should at each VLAN label from the packet of CM adding CDT form.CM Index(and above-mentioned index value) to be CMC be unique identification that each CM distributes, the message of the CPE of each CM and lower extension thereof sends from radio frequency interface module the CM Index that Shi Douhui adds this CM.
In actual applications, a concordance list can be set up for storing the MAC Address of each CM according to CM Index.Each CM under index value energy unique identification DHCP relay module in this concordance list.Certainly, for the distributed architecture of different convergence forwarding unit types, different DHCP relay modules, different index values can be defined by actual conditions.Such as, for optical line terminal (OLT), the index value of poly-forwarding unit can be considered to be defined as: PON Index+CMC Index+CM Index, for switch (Switch), router, poly-forwarding unit index value can be considered to be decided to be: Port Index+CMC Index+CM Index.
By using CDT label as CMC Index in C-DOSIS system, CMC Index can be obtained by distinct device type and distributed frame, port information etc., generate the mode of the index value of the CM under energy unique identification DHCP relay module, and then set up the relation of tracing to the source of DHCP message and CM, realize inserting Option82 in DHCP message.
Fig. 7 is that C-DOCSIS inserts Option82 flow chart by CDT label according to the preferred embodiment of the invention, and as shown in Figure 7, this flow process comprises:
Step S702, receives up DHCP message;
Step S704, analytic message, obtains CM Index, and other information needed, generating indexes value;
Whether step S706, discovery message, if found, perform step S708, otherwise, perform step S712;
Step S708, resolves Option82, and judges whether from CM, if so, performs step S710, otherwise, perform step S712;
Step S710, sets up or upgrades index value, forming CM MAC address entries;
Step S712, searches CM MAC by index value;
Step S714, inserts Option Remote Id.
Trace to the source relation establishing method and the relation apparatus for establishing of tracing to the source that adopt above-described embodiment to provide, can be forwarded to the effect converging and insert relay agent information Option82 in forwarding unit DHCP message after by CMC by Ethernet protocol.
From above description, can find out, present invention achieves following technique effect: adopting according to the index information that pre-sets is the mode setting up relation of tracing to the source from the DHCP message of cable modem and CM, to solve in correlation technique DHCP message by after CMC by Ethernet protocol be forwarded to converge forwarding unit time, converge the problem that the forwarding unit MAC Frame header that cannot be defined by DOCSIS again sets up the relation of tracing to the source between CM under CMC and DHCP message, reach and after by CMC, the effect converging and insert relay agent information Option82 in forwarding unit DHCP message can be forwarded to by Ethernet protocol.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. to trace to the source a relation establishing method, it is characterized in that, comprising:
The DynamicHost that convergence forwarding unit receives from cable modem CM arranges protocol DHCP message;
Described convergence forwarding unit sets up the relation of tracing to the source between described DHCP message and described CM according to the index information pre-set.
2. method according to claim 1, is characterized in that, described index information comprises: index value, and wherein, described index value can the MAC address of CM described in unique identification.
3. method according to claim 2, is characterized in that, described index value is that described CM distributes by wire cable media changer devices CMC.
4. method according to claim 2, is characterized in that, described index value is CDT label, and wherein, described CDT label uses the Business Stream of virtual LAN VLAN tagged manner to the packet place of described DHCP message to identify the label obtained.
5. method according to any one of claim 1 to 4, is characterized in that, described convergence forwarding unit comprise following one of at least: optical line terminal OLT, switch, router.
6. relation of a tracing to the source apparatus for establishing, is positioned at convergence forwarding unit, it is characterized in that, comprising:
Receiver module, arranges protocol DHCP message for the DynamicHost received from cable modem CM;
Set up module, for setting up the relation of tracing to the source between described DHCP message and described CM according to the index information pre-set.
7. device according to claim 6, is characterized in that, described index information comprises: index value, and wherein, described index value can the MAC address of CM described in unique identification.
8. device according to claim 7, is characterized in that, described index value is that described CM distributes by wire cable media changer devices CMC.
9. device according to claim 7, is characterized in that, described index value is CDT label, and wherein, described CDT label uses the Business Stream of virtual LAN VLAN tagged manner to the packet place of described DHCP message to identify the label obtained.
10. the device according to any one of claim 6 to 9, is characterized in that, described convergence forwarding unit comprise following one of at least: optical line terminal OLT, switch, router.
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Cited By (1)
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| CN106302013A (en) * | 2016-08-12 | 2017-01-04 | 成都广达新网科技股份有限公司 | A kind of desktop system testing CMC basic service and method of work |
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