CN104394160A - Method for applying link layer discovery protocol on synchronous digital hierarchy - Google Patents
Method for applying link layer discovery protocol on synchronous digital hierarchy Download PDFInfo
- Publication number
- CN104394160A CN104394160A CN201410722763.7A CN201410722763A CN104394160A CN 104394160 A CN104394160 A CN 104394160A CN 201410722763 A CN201410722763 A CN 201410722763A CN 104394160 A CN104394160 A CN 104394160A
- Authority
- CN
- China
- Prior art keywords
- message
- sdh
- line card
- local
- lldp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
- H04J3/0623—Synchronous multiplexing systems, e.g. synchronous digital hierarchy/synchronous optical network (SDH/SONET), synchronisation with a pointer process
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/04—Network management architectures or arrangements
- H04L41/046—Network management architectures or arrangements comprising network management agents or mobile agents therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
Abstract
A method for applying a link layer discovery protocol on a synchronous digital hierarchy relates to the field of access network element band inside/outside management channel achievement. The method includes that a local web master disc constructs an LLDP message and inserts a marking field behind the VLAN field; a local SDH line card receives a message transmitted by the local web master disc and removes the marking field and restores to the LLDP message if the marking field is matched with the information of the local SDH line card; HDLC package is conducted after the restored LLDP message is packaged to be of the DCC frame structure, and the structure is mapped to the DCC channel of the SDH plane after twice of package; the far end SDH line car extracts the message of the DCC channel, if the message is the LLDP message, the marking field at the end is added and transmitted to the web master disc, and the far end web master disc processes the LLDP message. The web master information of the LLDP can be transmitted to the far end web element through the SDH plane, the CPU load of the web master is reduced, the message processing speed is improved, and the method is simple and flexible to apply.
Description
Technical field
To the present invention relates in access network elements band/outband management passage realizes field, is specifically a kind of method that Link Layer Discovery Protocol is applied in SDH (Synchronous Digital Hierarchy).
Background technology
At present, the configuration that the kind of access layer network equipment is day by day various and respective is intricate, in order to enable the equipment of different vendor mutually find in a network and system respective alternately and configuration information, needs the information intercourse platform of a standard.
LLDP (Link Layer Discovery Protocol, Link Layer Discovery Protocol) be exactly produce in this context, the link layer it providing a kind of standard finds mode, can by local device unique ability, management address, device identification, the Information Organizations such as interface identifier become different TLV (Type/Length/Value, type/length/value), and be encapsulated in LLDPDU (Link Layer Discovery Protocol Data Unit, Link Layer Discovery Protocol data cell) in be distributed to the neighbours direct-connected with oneself, neighbours to receive it after these information with standard mib (Management Information Base, management information bank) form save, for network management system inquiry and the communication conditions judging link.
In brief, LLDP is a kind of contiguous discovery agreement.It is ethernet network device, as switch, router and wireless local network connecting point define a kind of method of standard, makes it to the existence of other nodes bulletin in network self, and can preserve the discovery information of each nearby device.Such as the details such as Equipments Setting and recognition of devices can be announced by this agreement.
Current operator Access Network ubiquity Ethernet and SDH (Synchronous DigitalHierarchy, SDH (Synchronous Digital Hierarchy)) biplane, it is also proposed new requirement to NE management.As shown in Figure 1, meet the primitive frame structure of LLDP standard definition, when actual networking, the LLDP message of this structure can practice in Ethernet plane, but cannot access SDH plane.SDH has the data communication channel DCC for OAM, and main application DCCHDLC Frame realizes.NE management for two kinds of planes realizes, and existing method is that webmaster CPU needs to assemble and resolve LLDP agreement, DCC HDLC Frame respectively, and the load of webmaster CPU is comparatively large, and message processing speed is lower.
Summary of the invention
For the defect existed in prior art, a kind of Link Layer Discovery Protocol is the object of the present invention is to provide to be applied in the method for SDH (Synchronous Digital Hierarchy), the network management information of LLDP can by the network element of SDH planar transmission to far-end, reduce webmaster cpu load, improve message processing speed, application simple and flexible.
For reaching above object, the present invention takes a kind of Link Layer Discovery Protocol to be applied in the method for SDH (Synchronous Digital Hierarchy), comprising: S1. local network management dish structure LLDP message, inserts indication field, for indicating destination line card and port numbers after VLAN field; S2. local SDH line card receives the message that local network management hair updo is sent, if the indication field of message and local SDH line card information matches, divests indication field, is reduced to LLDP message; S3. the LLDP message after reduction is packaged into DCC frame structure by local SDH line card, and again DCC frame is carried out HDLC encapsulation, is mapped to the DCC passage of SDH plane after completing twice encapsulation; S4. far-end SDH line card extracts the message of DCC passage, if this message is LLDP message, adds the indication field of this end, sends to this end webmaster dish; S5. far-end webmaster dish process LLDP message.
On the basis of technique scheme, in S2, if the indication field of message is not mated with local SDH line card information, abandon this message.
On the basis of technique scheme, the management channels that local network management dish and local SDH line card pass through the backboard of local network element is interconnected; The management channels that far-end webmaster dish and far-end SDH line card pass through the backboard of remote network element is interconnected.
On the basis of technique scheme, in S2, local SDH line card comprises programmable logic device, for receiving the message that webmaster hair updo is sent, and the indication field of byte-by-byte this message of inquiry, judge whether and local SDH line card information matches.
On the basis of technique scheme, in S3, read LLDP message and carry out DCC and HDLC encapsulation, SDH board comprises SDH aggregator, the frame alignment signal provided according to SDH aggregator confirms whether first line of a couplet queue of giving out a contract for a project allows to give out a contract for a project, if so, LLDP message after encapsulation is mapped to the DCC passage of SDH plane, by the data inserting paragraph expense of DCC passage; If not, the message do not sent waits for stored in continuing in queue of giving out a contract for a project the opportunity allowing to give out a contract for a project.
On the basis of technique scheme, in S4, far-end SDH line card comprises programmable logic device, for extracting the message of DCC passage, carry out HDLC decapsulation and buffer memory, under the prerequisite that the Frame Check Sequence of message tail is correct, judge whether this message is LLDP message, if not, transparent transmission message is by other resume module; If so, read far-end destination line card and port numbers, after VLAN field, insert this end indication field.
Beneficial effect of the present invention is:
Can apply and access multiservice platform, the LLDP packet of NE management can slitless connection Ethernet or SDH transmission network.Adopt FPGA (Field Programmable GateArray, programmable logic device) to carry out Message processing, do not need the CPU of webmaster dish to safeguard LLDP and DCC two kinds of message informations simultaneously, reduce the load of the CPU of webmaster dish.FPGA processing speed is much higher than CPU, carries out inserting and delete self-defined byte required time very short, and very little to the delay of original LLDP data flow, the extra time delay of increase is within 1ms.
Webmaster dish is only assembled and is resolved LLDP message, and for needing the LLDP message accessing SDH plane, encapsulated LLDP message by FPGA, after encapsulation, frame format meets DCC channel definition, can allow LLDP message by SDH planar transmission to remote network element.Access network equipment NE management can be simplified in this way, the software development work of realization, can flexible Application to Ethernet/SDH biplane, mixed or any plane is used alone.
Accompanying drawing explanation
Fig. 1 is LLDP primitive frame structural representation;
Fig. 2 is the application schematic diagram of the present invention between local network element and remote network element;
Fig. 3 is the DCC frame structure schematic diagram after encapsulation.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 2, Link Layer Discovery Protocol is applied in the method for SDH (Synchronous Digital Hierarchy), be applied between local network element and remote network element, local network element is identical with remote network element built-in system, include backboard, and webmaster dish, Ethernet line card and the SDH line card to be connected with respective backboard, webmaster dish comprises CPU, Ethernet line card comprises Ethernet first line of a couplet exchange chip and FPGA, SDH line card comprises FPGA and SDH aggregator, webmaster dish, interconnected by the management channels of backboard between Ethernet line card and SDH line card.
Link Layer Discovery Protocol of the present invention is applied in the method for SDH (Synchronous Digital Hierarchy), specifically comprises the steps:
S1. local network management dish structure LLDP message, indication field is inserted after VLAN field, for representing the destination line card and port numbers etc. of transmission, in the present embodiment, indication field is the custom field of 10 bytes, for the sign of local network element lamina dorsalis slot and port numbers, have nothing to do with the information finally encapsulated into DCC passage.
S2. local SDH line card receives the message that local network management hair updo is sent, more specifically, message is sent, via backboard by the CPU network interface of local network management dish, after FPGA on local SDH line card receives, in this message of byte-by-byte inquiry, the indication field of 10 bytes, carrys out determination operation type according to indication field, namely judge indication field whether with local SDH line card information matches, if, then divest the indication field of this 10 byte, be reduced to LLDP message, enter S3; If not, then abandon this message, be left intact.
S3. the FPGA of local SDH line card carries out the encapsulation of DCC frame to the LLDP message after reduction, and the DCC frame after encapsulation carries out HDLC encapsulation again.Complete the structure after twice encapsulation as shown in Figure 3, wherein the indication field " ABCDEFGHIJ " of 10 bytes is represented by dashed line deleted, other bytes such as source MAC, VLAN are packed, and LLDP multicast address is not packed, and packed LLDP payload meets LLDP primitive frame structure.LLDP message after encapsulation is judged by SDH aggregator, the frame alignment signal provided according to SDH aggregator confirms whether first line of a couplet queue of giving out a contract for a project allows to give out a contract for a project, if so, LLDP message after encapsulation is mapped to the DCC passage of SDH plane, by the data inserting paragraph expense of DCC passage; If not, the message do not sent waits for stored in continuing in queue of giving out a contract for a project the opportunity allowing to give out a contract for a project.
S4. the FPGA of far-end SDH line card extracts the message of DCC passage, HDLC decapsulation is carried out and buffer memory to message, byte-by-byte scanning message content, at FCS (the Frame check sequence of message tail, Frame Check Sequence) under correct prerequisite, judge whether this message is LLDP message, and if not, transparent transmission message is by other resume module; If so, read far-end destination line card and port numbers, after VLAN field, insert this end indication field, pass to far-end webmaster dish by the backboard of far-end.
S5. this LLDP message of far-end webmaster dish process.
The present invention is not limited to above-mentioned execution mode, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (6)
1. Link Layer Discovery Protocol is applied in a method for SDH (Synchronous Digital Hierarchy), it is characterized in that, comprising:
S1. local network management dish structure LLDP message, inserts indication field, for indicating destination line card and port numbers after VLAN field;
S2. local SDH line card receives the message that local network management hair updo is sent, if the indication field of message and local SDH line card information matches, divests indication field, is reduced to LLDP message;
S3. the LLDP message after reduction is packaged into DCC frame structure by local SDH line card, and again DCC frame is carried out HDLC encapsulation, is mapped to the DCC passage of SDH plane after completing twice encapsulation;
S4. far-end SDH line card extracts the message of DCC passage, if this message is LLDP message, adds the indication field of this end, sends to this end webmaster dish;
S5. far-end webmaster dish process LLDP message.
2. Link Layer Discovery Protocol as claimed in claim 1 is applied in the method for SDH (Synchronous Digital Hierarchy), it is characterized in that: in S2, if the indication field of message is not mated with local SDH line card information, abandons this message.
3. Link Layer Discovery Protocol as claimed in claim 1 is applied in the method for SDH (Synchronous Digital Hierarchy), it is characterized in that: the management channels that local network management dish and local SDH line card pass through the backboard of local network element is interconnected; The management channels that far-end webmaster dish and far-end SDH line card pass through the backboard of remote network element is interconnected.
4. Link Layer Discovery Protocol as claimed in claim 1 is applied in the method for SDH (Synchronous Digital Hierarchy), it is characterized in that: in S2, local SDH line card comprises programmable logic device, for receiving the message that webmaster hair updo is sent, and the indication field of byte-by-byte this message of inquiry, judge whether and local SDH line card information matches.
5. Link Layer Discovery Protocol as claimed in claim 1 is applied in the method for SDH (Synchronous Digital Hierarchy), it is characterized in that: in S3, read LLDP message and carry out DCC and HDLC encapsulation, SDH board comprises SDH aggregator, the frame alignment signal provided according to SDH aggregator confirms whether first line of a couplet queue of giving out a contract for a project allows to give out a contract for a project, if so, LLDP message after encapsulation is mapped to the DCC passage of SDH plane, by the data inserting paragraph expense of DCC passage; If not, the message do not sent waits for stored in continuing in queue of giving out a contract for a project the opportunity allowing to give out a contract for a project.
6. Link Layer Discovery Protocol as claimed in claim 1 is applied in the method for SDH (Synchronous Digital Hierarchy), it is characterized in that: in S4, far-end SDH line card comprises programmable logic device, for extracting the message of DCC passage, carry out HDLC decapsulation and buffer memory, under the prerequisite that the Frame Check Sequence of message tail is correct, judge whether this message is LLDP message, if not, transparent transmission message is by other resume module; If so, read far-end destination line card and port numbers, after VLAN field, insert this end indication field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410722763.7A CN104394160B (en) | 2014-12-03 | 2014-12-03 | A kind of Link Layer Discovery Protocol applies the method in SDH |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410722763.7A CN104394160B (en) | 2014-12-03 | 2014-12-03 | A kind of Link Layer Discovery Protocol applies the method in SDH |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104394160A true CN104394160A (en) | 2015-03-04 |
| CN104394160B CN104394160B (en) | 2017-09-29 |
Family
ID=52611995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410722763.7A Active CN104394160B (en) | 2014-12-03 | 2014-12-03 | A kind of Link Layer Discovery Protocol applies the method in SDH |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104394160B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167762A (en) * | 2018-08-14 | 2019-01-08 | 杭州迪普科技股份有限公司 | A kind of IEC104 message checking method and device |
| CN112511333A (en) * | 2020-10-13 | 2021-03-16 | 广州市高科通信技术股份有限公司 | Method, device and medium for managing opposite terminal device through SDH network |
| CN115277190A (en) * | 2022-07-27 | 2022-11-01 | 北京国领科技有限公司 | Method for realizing neighbor discovery on network by link layer transparent encryption system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110019689A1 (en) * | 2009-07-24 | 2011-01-27 | Wael William Diab | Method And System For Associating Physical Link Partners Using A Layer Two Mechanism |
| CN102223278A (en) * | 2011-05-17 | 2011-10-19 | 中兴通讯股份有限公司 | Realization method and system for enabling LLDP function on non-Ethernet link |
| CN104009943A (en) * | 2013-02-21 | 2014-08-27 | 中兴通讯股份有限公司 | LLDP (Link Layer Discovery Protocol) message transmission method and DCB (Data Center Bridging) device |
-
2014
- 2014-12-03 CN CN201410722763.7A patent/CN104394160B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110019689A1 (en) * | 2009-07-24 | 2011-01-27 | Wael William Diab | Method And System For Associating Physical Link Partners Using A Layer Two Mechanism |
| CN102223278A (en) * | 2011-05-17 | 2011-10-19 | 中兴通讯股份有限公司 | Realization method and system for enabling LLDP function on non-Ethernet link |
| CN104009943A (en) * | 2013-02-21 | 2014-08-27 | 中兴通讯股份有限公司 | LLDP (Link Layer Discovery Protocol) message transmission method and DCB (Data Center Bridging) device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167762A (en) * | 2018-08-14 | 2019-01-08 | 杭州迪普科技股份有限公司 | A kind of IEC104 message checking method and device |
| CN112511333A (en) * | 2020-10-13 | 2021-03-16 | 广州市高科通信技术股份有限公司 | Method, device and medium for managing opposite terminal device through SDH network |
| CN112511333B (en) * | 2020-10-13 | 2023-04-18 | 广州市高科通信技术股份有限公司 | Method, device and medium for managing opposite terminal device through SDH network |
| CN115277190A (en) * | 2022-07-27 | 2022-11-01 | 北京国领科技有限公司 | Method for realizing neighbor discovery on network by link layer transparent encryption system |
| CN115277190B (en) * | 2022-07-27 | 2023-08-15 | 北京国领科技有限公司 | Method for realizing neighbor discovery on network by link layer transparent encryption system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104394160B (en) | 2017-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11510131B2 (en) | Configuration method, data transmission method, and apparatus | |
| WO2019019906A1 (en) | Communication method and device, and storage medium | |
| CN103795605B (en) | Method and system for converting OTN signals into Ethernet payloads | |
| CN107181663A (en) | A kind of message processing method, relevant device and computer-readable recording medium | |
| US9641916B2 (en) | Optical channel data unit service transmission apparatus and method | |
| WO2016107122A1 (en) | Method and device for converting between rapidio packet and ethernet packet | |
| CN101156396B (en) | Data frame transmission processing method and system | |
| CN103490961B (en) | Network equipment | |
| EP3641237A1 (en) | Transmission network system, and data exchange and transmission method, device and apparatus | |
| CN109412922B (en) | Method, forwarding device, controller and system for transmitting message | |
| CN105162674A (en) | Method and network card for physical machine to access to virtual network | |
| CN105162732B (en) | Create the method, apparatus of ECP Extended Capabilities Port | |
| CN108521343A (en) | A kind of processing method and processing device of OAM message | |
| CN112491687A (en) | Method and device for processing message | |
| CN102315892B (en) | Data forwarding device, cable fastener plates and data forwarding method | |
| CN106330499A (en) | Time division multiplexing data transmission method and device, as well as network-side edge devices | |
| CN104394160A (en) | Method for applying link layer discovery protocol on synchronous digital hierarchy | |
| CN105208468B (en) | The method and system opened automatically for OTN business | |
| CN103067278A (en) | Data frame transmission processing method, equipment and system | |
| CN109936781A (en) | A kind of method, apparatus and system of data transmission | |
| CN102437944B (en) | System, device and method for intercommunication between LANs (local area networks) | |
| JP5658279B2 (en) | Method and apparatus for realizing time division multiplexed data transmission | |
| CN109462558A (en) | A kind of pair of MPLS message carries out the device of GRE encapsulation process | |
| CN107948040A (en) | Realize the system and method for ILK interface business and Ethernet interface business intercommunication | |
| CN103825831A (en) | Packet transmitting method and switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190116 Address after: 430074 No. 6, High-tech Fourth Road, Donghu High-tech Development Zone, Wuhan City, Hubei Province Patentee after: Fenghuo Communication Science &. Technology Co., Ltd. Address before: 430074 Guandong Optical Communication Industry Building, No. 5 Donghu High-tech Dongxin Road, Wuhan City, Hubei Province Patentee before: Wuhan Fenghuo Network Co., Ltd. |