CN109462557A - The backup method of BFD session on a kind of active and standby master control borad - Google Patents
The backup method of BFD session on a kind of active and standby master control borad Download PDFInfo
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- CN109462557A CN109462557A CN201811195285.3A CN201811195285A CN109462557A CN 109462557 A CN109462557 A CN 109462557A CN 201811195285 A CN201811195285 A CN 201811195285A CN 109462557 A CN109462557 A CN 109462557A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/10—Packet switching elements characterised by the switching fabric construction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/55—Prevention, detection or correction of errors
- H04L49/557—Error correction, e.g. fault recovery or fault tolerance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/2866—Architectures; Arrangements
- H04L67/30—Profiles
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
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Abstract
The backup method of BFD session, this method step are as follows: the BFD session configuration data of creation, the BFD session negotiation parameter of state UP are issued by slave control board by the upper application module of main control board first on a kind of active and standby master control borad；The upper application module of slave control board is created into BFD session according to the BFD session configuration data received in BFD module；Again according to the BFD session negotiation parameter received, the BFD Init message of building simulation opposite end is transmitted to BFD module；So that the BFD session status of active and standby master control borad is fully synchronized.The program can on simple realization IPRAN convergence device exchange chip carry the BFD session status in BFD module back up in realtime and batch backup, the BFD protocol massages of subsequent opposite end are sent to main control board and slave control board by analog switch simultaneously, and main control board BFD module can synchronous variation with slave control board BFD module.
Description
Technical field
The present invention relates to a kind of backup methods of BFD session on active and standby master control borad.
Background technique
One of the network equipment is more and more important to be characterized in requiring quickly to examine communication failure between adjacent system
It surveys, replaceable channel can be set up faster when breaking down in this way or is switched to other channels.In order to meet this need
It asks, produces BFD (Bidirectional Forwarding Detection, two-way converting detection) technology.
BFD technology is a kind of two-way converting testing mechanism standardized, medium is unrelated, agreement is unrelated, can be difference
Upper layer application (such as routing, PW, LDP, OSPF, IS-IS etc.) provide fault detection service.BFD technology is also a kind of fast
Fast fault detection mechanism is capable of providing the detection of Millisecond, passes through BFD and upper layer application and links, it can be ensured that routing it is quick
Convergence, it is ensured that business is quickly switched.After adjacent system sets up connection relationship by BFD technology, built between them
BFD detection messages are periodically mutually sent out on vertical session channel；If some system is interior when detecting not to receive opposite end
BFD detection messages, then it is assumed that failure has occurred in this bi-directional session channel.
Currently, the network services such as voice, video, special line in IPRAN network all propose the flow break period tightened up
Requirement, the control of flow interrupt time caused by many operator's expectation network failures is even lower within 50ms, this will
It asks in IPRAN deployed with devices BFD technology, and is required to provide the detection of Millisecond.IPRAN convergence device usually also requires
Using dual master control plate technology come lifting means reliability, guarantee in the system failure forwarded interrupt less as far as possible even not in
It is disconnected, it may be assumed that two pieces of master control borads to be configured in IPRAN equipment, wherein main control board is responsible for agreement operation and business forwarding, spare master
Plate is controlled as backup, when main control board breaks down, by the corresponding agreement operation of slave control board rapid pipe connecting and business
Forwarding.
Currently, IPRAN convergence device generally all configures two pieces of master control borads, one of master control borad works in master state,
Another piece of master control borad work realizes the single-emission and double-receiving function of message by the analog switch on business board: only in stand-by state
The message that main control board is sent can be sent to opposite equip. by analog switch, and the message received from opposite end is opened by simulation
It closes while being sent to main control board and slave control board；Master control borad is all that the external FPGA of exchange chip realizes BFD technology, double masters
Control the backup procedure of BFD session on plate are as follows: the upper application module of main control board joins the configuration data of BFD session, negotiation
Several and session status issues slave control board, and the upper application module of slave control board, which is directly modified, corresponds to BFD meeting in its FPGA
The configuration data of words negotiates parameter and session status, so that the BFD session of slave control board and main control board is fully synchronized.
The all included BFD module of more and more exchange chips now, it is effective substitution that the external FPGA of exchange chip realizes BFD technology
Scheme all has advantage on its workinprocess cost and product energy consumption；If IPRAN convergence device uses this included BFD module
The One Chip Solutions of exchange chip, this IPRAN convergence device will have very big market competition advantage.However due to
This kind of exchange chip carries the negotiation parameter of the BFD session in BFD module and session status and can not directly be repaired by application module
Change, therefore exchange chip on IPRAN convergence device cannot achieve by traditional BFD session backup method and carry in BFD module
BFD session active and standby synchronization.
Summary of the invention
Its of the invention purpose, which is that, provides a kind of backup method of BFD session on active and standby master control borad, solves traditional
BFD session backup method cannot achieve the active and standby same of the BFD session in the included BFD module of exchange chip on IPRAN convergence device
The problem of step.
It adopts the technical scheme that achieve the above object, the backup method of BFD session on a kind of active and standby master control borad should
Method the following steps are included:
(1) first by the upper application module of main control board by the BFD meeting of the BFD session configuration data, state UP of creation
Words negotiate parameter and issue slave control board；
(2) upper application module of slave control board is created in BFD module according to the BFD session configuration data received
BFD session；
(3) again according to the BFD session negotiation parameter received, the BFD Init message of building simulation opposite end is transmitted to BFD module；
(4) make the BFD session status of active and standby master control borad fully synchronized.
Beneficial effect
The present invention has the following advantages that compared with prior art.
It is an advantage of the invention that this method exchange chip can carry in BFD module on simple realization IPRAN convergence device
BFD session status back up in realtime and batch backup, the BFD protocol massages of subsequent opposite end are sent to simultaneously by analog switch
Main control board and slave control board, main control board BFD module and slave control board BFD module synchronous can change, even if
Active and standby master control board switching occurs, BFD session connection will not be interrupted and restart.
Detailed description of the invention
Below in conjunction with attached drawing, the invention will be further described.
Fig. 1 is the flow diagram of backing up in realtime of BFD session in the embodiment of the present invention 1；
Fig. 2 is the batch backup flow diagram of BFD session in the embodiment of the present invention 2.
Specific embodiment
The backup method of BFD session on a kind of active and standby master control borad, as shown in Figure 1 and Figure 2, method includes the following steps:
(1) first by the upper application module of main control board by the BFD meeting of the BFD session configuration data, state UP of creation
Words negotiate parameter and issue slave control board；
(2) upper application module of slave control board is created in BFD module according to the BFD session configuration data received
BFD session；
(3) again according to the BFD session negotiation parameter received, the BFDInit message of building simulation opposite end is transmitted to BFD module；
(4) make the BFD session status of active and standby master control borad fully synchronized.
The present invention provides a kind of backup methods of BFD session on active and standby master control borad, to realize that IPRAN convergence device is submitted
The active and standby synchronization for changing the BFD session that chip carries in BFD module, even if active and standby master control board switching occurs, BFD session connection is not yet
It can interrupt and restart.Technical solution provided by the invention is capable of the active and standby synchronization of black box for processing BFD session, shields BFD module
Inside realize details, driven by way of simulate opposite end BFD Init message active and standby BFD session parameter and session status guarantor
It holds unanimously, realize simple and does not allow error-prone.
Embodiment 1
The backup method of BFD session on a kind of active and standby master control borad, as shown in Figure 1, detailed process are as follows:
Step 101, when the main control board of IPRAN convergence device and slave control board are all run in place, the first upper layer application
Module creation BFD session, and the configuration data for creating BFD session is sent to the second upper application module, wherein the first upper layer
Application module is corresponding BFD upper application module on main control board, and the second upper application module is corresponding for slave control board
BFD upper application module；
Step 102, the first upper application module calls special purpose interface to create BFD session instance, BFD meeting in the first BFD module
Speech phase DOWN；First BFD module is corresponding exchange chip BFD module on main control board；
Step 103, the second upper application module creates BFD session according to the configuration data for receiving BFD session, and calls dedicated
Interface creates BFD session instance, BFD session status DOWN in the 2nd BFD module；Wherein the 2nd BFD module is spare master control
Corresponding exchange chip BFD module on plate；
Step 104, the first BFD module is held consultation with opposite end BFD session, receives opposite end BFD Down message and BFD Init/
Up message, BFD session will be by state DOWN- > state I NIT- > state UP, or after receiving opposite end BFD Init message, BFD session
It will be by state DOWN- > state UP；After BFD session status UP, the first upper application module is notified；
Step 105, after the first upper application module receives BFD session status UP notice, the first upper application module is from the first BFD
Module obtains the negotiation parameter of BFD session, is subsequently transmitted to the second upper application module；
Step 106, the second upper application module is according to the negotiation parameter for receiving BFD session, and the BFD session backed up with before
The BFD Init message of configuration data, building simulation opposite end injects exchange chip, and the BFD Init message for simulating opposite end is transmitted to
2nd BFD module；
Step 107, the 2nd BFD module receives the BFD Init message of simulation opposite end, and according to BFD state transition machine, BFD session will
By state DOWN- > state UP, perhaps remained unchanged by state I NIT- > state UP or BFD session status UP；BFD session
After state UP, the second upper application module is notified.
By above step, slave control board BFD module just reaches the shape of backing up in realtime of main control board BFD module
The BFD protocol massages of state, subsequent opposite end are sent to main control board and slave control board, primary master control by analog switch simultaneously
Plate BFD module and slave control board BFD module can synchronous variation, even if generation masterslave switchover, BFD session connection will not in
Break and restarts.
Embodiment 2
The backup method of BFD session on a kind of active and standby master control borad, as shown in Fig. 2, detailed process are as follows:
Step 201, when being directed to main control board insertion slave control board on IPRAN convergence device, third upper layer application mould
The configuration data of the BFD session of all creations is sent to the 4th upper application module by block, and wherein third upper application module is
Upper application module on main control board, the 4th upper application module are the corresponding BFD upper application module of slave control board；
Step 202, the 4th upper application module successively creates BFD session according to the configuration data for receiving BFD session；And it calls
Special purpose interface, in the corresponding BFD session of the 4th BFD module creation；Wherein the 4th BFD module is corresponding friendship on slave control board
Change chip BFD module；
Step 203, third upper application module obtain the 3rd BFD module in institute the stateful BFD session negotiation parameter for UP, criticize
Amount backup is sent to the 4th upper application module；Wherein the 3rd BFD module is corresponding exchange chip BFD mould on slave control board
Block；
Step 204, the 4th upper application module is according to the negotiation parameter for receiving BFD session, and the BFD session backed up with before
The BFD Init message of configuration data, building simulation opposite end injects exchange chip, and the BFD Init message for simulating opposite end is transmitted to
4th BFD module；
Step 205, the 4th BFD module is subsequently received the BFD Init message of simulation opposite end, according to BFD state transition machine, BFD meeting
Words will by state DOWN- > state UP, stateful UP BFD session all active and standby synchronizations；After BFD session status UP, is notified
Four upper application modules.
By above step, slave control board BFD module just reaches the batch backup shape of main control board BFD module
The BFD protocol massages of state, subsequent opposite end are sent to main control board and slave control board, primary master control by analog switch simultaneously
Plate BFD module and slave control board BFD module can synchronous variation, even if generation masterslave switchover, BFD session connection will not in
Break and restarts.
Claims (1)
1. the backup method of BFD session on a kind of active and standby master control borad, which is characterized in that method includes the following steps:
The BFD session of the BFD session configuration data of creation, state UP are assisted by the upper application module of main control board first
Quotient's parameter issues slave control board；
The upper application module of slave control board is created into BFD meeting according to the BFD session configuration data received in BFD module
Words；
Again according to the BFD session negotiation parameter received, the BFD Init message of building simulation opposite end is transmitted to BFD module；
So that the BFD session status of active and standby master control borad is fully synchronized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195285.3A CN109462557A (en) | 2018-10-15 | 2018-10-15 | The backup method of BFD session on a kind of active and standby master control borad |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195285.3A CN109462557A (en) | 2018-10-15 | 2018-10-15 | The backup method of BFD session on a kind of active and standby master control borad |
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| CN109462557A true CN109462557A (en) | 2019-03-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021025826A1 (en) * | 2019-08-02 | 2021-02-11 | Ciena Corporation | Retaining active operations, administration, and maintenance (oam) sessions across multiple devices operating as a single logical device |
| US11206197B2 (en) | 2017-04-05 | 2021-12-21 | Ciena Corporation | Scaling operations, administration, and maintenance sessions in packet networks |
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| CN101075861A (en) * | 2007-06-28 | 2007-11-21 | 中兴通讯股份有限公司 | Method for realizing main spared board thermal backup and reversing main spared board |
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2018
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Patent Citations (6)
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| CN101075861A (en) * | 2007-06-28 | 2007-11-21 | 中兴通讯股份有限公司 | Method for realizing main spared board thermal backup and reversing main spared board |
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Non-Patent Citations (1)
| Title |
|---|
| 李铭超: ""IPRAN承载网中BFD协议的研究与实现"", 《武汉邮电科学研究院硕士学位论文》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11206197B2 (en) | 2017-04-05 | 2021-12-21 | Ciena Corporation | Scaling operations, administration, and maintenance sessions in packet networks |
| WO2021025826A1 (en) * | 2019-08-02 | 2021-02-11 | Ciena Corporation | Retaining active operations, administration, and maintenance (oam) sessions across multiple devices operating as a single logical device |
| US11310102B2 (en) | 2019-08-02 | 2022-04-19 | Ciena Corporation | Retaining active operations, administration, and maintenance (OAM) sessions across multiple devices operating as a single logical device |
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Application publication date: 20190312 |