CN102739430B - Method and system for realizing Ethernet protection switching - Google Patents
Method and system for realizing Ethernet protection switching Download PDFInfo
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- CN102739430B CN102739430B CN201110095468.XA CN201110095468A CN102739430B CN 102739430 B CN102739430 B CN 102739430B CN 201110095468 A CN201110095468 A CN 201110095468A CN 102739430 B CN102739430 B CN 102739430B
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- data cell
- link
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- 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
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
Abstract
The invention provides a method for realizing an Ethernet protection switching. The method comprises: in two data units dual-homed connected in the Ethernet, when a data unit which is transmitting a service learns local link anomalies, inserting an alarm in a time slot of a corresponding system port, and a cross board choosing the system port's time slot of the data unit without the alarm to transmit the service according to a sub-network connection protection. The invention also provides a system for realizing the Ethernet protection switching. The method and the system can effectively solve a problem that in a dual-homed connection, the service cannot be continuously transmitted as normal when a channel is broke down.
Description
Technical field
The present invention relates to network communication technology field, more particularly relates to a kind of pretection switch realization side of Ethernet service
Method and system.
Background technology
Along with the development of the Internet, the swift and violent growth of data service, ethernet technology have obtained extensive and important answering
With；And the succession due to mechanics of communication application and development, Ethernet is also towards multiple service supporting (Multi-Service
Transport Platform, abbreviation MSTP) direction develops.In the practical application of Ethernet, some business to network can
By property, requirement of real-time more and more higher.Therefore, need to support the Ethernet pretection switch of high reliability and real-time in network
The method of (Ethernet Protection Switching, abbreviation EPS).
As shown in figure 1, describing the schematic diagram of Ethernet dual homed connection, illustrated item by item below：
With two veneer ports of client connection, one is work veneer port, and another is to protect veneer port, two
Veneer port is active and standby each other.
Two veneers respectively have Single port to be connected (according to MEF (Metro Ethernet Forum, domain domain ether with client
Net forum), as UNI (User-to-Network interface, user and network interface) or user port), while two is single
Plate also has the port of equal number to be connected (according to MEF, as NNI (Network-to-Network with transmission network
Interface, network and network interface) or system port).The system port of two veneers has identical business configuration.
Each veneer includes one or more system ports.
One of user port and its system port assemble the working service passage for being set to EPS protection groups, another use
Family port and its system port assemble the protection service channel for being set to EPS protection groups.
All time slots that each pair system port group of working service passage and protection service channel is included each other, are required for
By the collocation method of SNCP (Sub-Network Connection Protection, be abbreviated as SNCP), it is fitted on same
On the same time slot of one tabula rasa, constitute two systems port set and the SNCP of the partial time slot of one optical port is protected.Jing cross boards
It is connected with the same time slot of tabula rasa afterwards.
Cross board selects the side of no alarm and the system port group for working service passage according to the principle of concurrent excellent receipts
Time slot passage transmitting and receiving service；Used as the system port group of protection service channel, which can receive the business from distal end, but its transmission
Cannot be dealt on tabula rasa to the business of distal end.
In the network, when working service passage is normal, business normally can be transmitted, if link occurs in working service passage
When abnormal, then the business of client will normally transmit and occur to interrupt.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of Ethernet pretection switch method and system, solves existing ether
The problem of service disconnection during one channel failure of net dual homed connection.
In order to solve the above problems, the invention provides a kind of Ethernet pretection switch implementation method, including：
In two data cells of Ethernet dual homed connection, the data cell for carrying out business transmission knows itself link
When abnormal, the insertion alarm in the time slot of its corresponding system port, cross board select no alarm according to SNCP
The time slot of the system port of data cell carries out business transmission.
Further, said method can also have the characteristics that methods described also includes：Business transmission is not carried out currently
When data cell knows that the link of the data cell for carrying out business transmission is abnormal, the number for currently not carrying out business transmission
The alarm in the time slot of its correspondence system port is removed according to unit.
Further, said method can also have the characteristics that methods described also includes, the data cell is in its correspondence
System port time slot in insertion alarm when, also block its corresponding system port.
Further, said method can also have the characteristics that the data cell for currently not carrying out business transmission is just known
When the link of the data cell of the business of carrying out transmission is abnormal, the data cell for currently not carrying out business transmission also opens which
Corresponding system port.
Further, said method can also have the characteristics that methods described also includes：Described two data cells pass through
Link detecting judges whether link is abnormal, and link-state information is sent to the cross board, and the cross board will be per number
Another data cell being sent to according to the link-state information of unit in described two data cells.
Further, said method can also have the characteristics that methods described also includes：The cross board specifies the time not
When receiving the link-state information of a data cell in described two data cells, judge that the data cell Link State is different
Often and inform another data cell.
The present invention also provides a kind of Ethernet pretection switch and realizes system, including：Primary data cell, preliminary data unit
And cross board, the primary data cell is connected by system port with cross board；The preliminary data unit and cross board are logical
Cross system port to be connected, wherein：
The primary data cell or preliminary data unit are used for：When the data cell is carrying out business to be transmitted, such as
Fruit knows itself link exception, the insertion alarm in the time slot of its corresponding system port；
The cross board is used for：The time slot of the system port of the data cell of no alarm is selected to enter according to SNCP
Industry business transmission.
Further, said system can also have the characteristics that the primary data cell or preliminary data unit are also used
In：When the data cell does not currently carry out business transmission, and know the link of another data cell for carrying out business transmission
When abnormal, the data cell for not carrying out business transmission removes the alarm in the time slot of its correspondence system port.
Further, said system can also have the characteristics that the primary data cell or preliminary data unit are also used
In：In the time slot of its corresponding system port during insertion alarm, also block its corresponding system port.
Further, said system can also have the characteristics that the primary data cell or preliminary data unit are also used
In：When the data cell does not currently carry out business transmission, and know the link of another data cell for carrying out business transmission
When abnormal, the data cell for not carrying out business transmission also opens its corresponding system port.
Further, said system can also have the characteristics that the primary data cell or preliminary data unit are also used
In：Judge whether link is abnormal by link detecting, and link-state information is sent to into cross board；
The cross board is additionally operable to：The link-state information of primary data cell or preliminary data unit feedback is received, will
The link-state information of primary data cell is sent to preliminary data unit, and the link-state information of preliminary data unit is sent
To primary data cell.
Further, said system can also have the characteristics that the cross board is additionally operable to：Institute is not received at the appointed time
When stating the link-state information of primary data cell or preliminary data unit, judge the data cell Link State exception and inform
Another data cell.
In sum, the invention provides a kind of method of the quick protective switch of Ethernet dual homed connection, effectively solves
Certainly dual homed connection in a channel failure when business normally cannot continue transmit problem, pretection switch speed reach carrier class with
The demand netted very much；The problems such as present invention also prevent broadcast storm and the data transmission upset of Ethernet connection network simultaneously.This
Special compounding of the invention without the need for client device, i.e., carry out interactive information without the need for message is transmitted between client and website.The present invention
Can apply in various networkings.
Description of the drawings
Fig. 1 is the schematic diagram of an Ethernet dual homed connection；
Fig. 2 is the state transition schematic diagram of primary and backup veneer in EPS groups.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutual combination in any.It should be appreciated that preferred embodiment described herein is merely to illustrate and explains the present invention, and
It is not used in the restriction present invention.
The present invention provides a kind of implementation method of Ethernet pretection switch, in the transmitting-receiving without the help of protocol massages, passes through
The control of detection and transmission channel to main/slave link connection status, realizes the quick protective switch of primary channel.Including：
1) in the case of the two passes of Ethernet dual homed connection are all normal, protection passage insertion alarm forces SNCP
Service aisle is selected to carry out business transmission, in addition, the system port of obstruction protection passage, makes to protect passage not receive and send industry
Business, so as to avoid the upset to client traffic transmission；
2) there is link failure in a passage for undertaking business transmission in the two passes of Ethernet dual homed connection
When, perceiving, the passage for undertaking business transmission is inserted for the link detecting of 802.3MAC port of the veneer by user port
Enter alarm, force SNCP to select another passage to carry out business transmission, in addition, opening the system port of former blocked passage, make
Which can undertake business transmission.This completes service protection during channel failure, it is to avoid the interruption of business and loss.
The present invention provides a kind of Ethernet pretection switch implementation method, including：
In two data cells of Ethernet dual homed connection, the data cell for carrying out business transmission knows itself link
When abnormal, the insertion alarm in the time slot of its corresponding system port, cross board select no alarm according to SNCP
The time slot of the system port of data cell carries out business transmission.
Wherein, methods described also includes：The current data cell for not carrying out business transmission is known
Data cell link it is abnormal when, the data cell for currently not carrying out business transmission remove its correspondence system port when
Alarm in gap.
Wherein, when the data cell inserts alarm in the time slot of its corresponding system port, also block which corresponding
System port.The current data cell for not carrying out business transmission knows the link exception of the data cell for carrying out business transmission
When, the data cell for currently not carrying out business transmission also opens its corresponding system port.By blocking non-transmission services
Data cell system port, so as to avoid to client traffic transmission upset.
Wherein, methods described also includes：By link detecting, described two data cells judge whether link is abnormal, and will
Link-state information is sent to cross board, and the link-state information of each data cell is sent to described two by the cross board
Another data cell in data cell.In addition, the cross board specifies the time not receive in described two data cells one
During the link-state information of individual data cell, judge the data cell Link State exception and inform another data cell.
Wherein, each data cell one veneer of correspondence.
The concrete technical scheme of the present invention is as follows：
When initial, by configuring as, the work veneer (user side of the veneer is elected to the veneer of a passage of dual homed connection
Mouthful it is work veneer port), the veneer of another passage elects protection veneer as, and (user port of the veneer is protection veneer end
Mouthful).
When two passes link is all normal, i.e., when all having normal transmission professional ability, protection veneer is in its system end
Time slot in mouthful inserts alarm for a period of time or constantly, forces the time slot of SNCP selection work veneer system port
As the passage of excellent receipts；Block the system port of protection veneer simultaneously so as to do not receive the data that cross board is sended over, to keep away
Exempt from these data forwardings to client, the upset for causing the data of client to transmit.At the same time and from start to finish whole mistake
Cheng Zhong, two veneers transmit the state of veneer respectively by communication modes between plate and cross board.Passed by the status information of cross board
Pass, make two veneers be in correct running status in phase.
When link failure occurs in the passage of protection veneer, the link of 802.3MAC port of the veneer by user port is protected
Detect to perceive link failure, protect veneer to the information of cross board report " protection single board service exception ", cross board again will
This information passes on to work veneer.Work veneer still keeps undertaking business transmission.
When the passage of protection veneer is normal, the passage of the veneer that works from link failure is normally changed into, the passage of the veneer that works
When not possessing the ability of normal transmission business, the link detecting of 802.3MAC port of the veneer by user port that work is perceiving
To link failure, the veneer that works reports the information of " work veneer service exception " to cross board, while to the system of this veneer
A period of time or constantly insertion alarm in the time slot of port, force SNCP to select the system port of protection veneer
Passage of the time slot as excellent receipts；After protection veneer obtains the information of " work veneer service exception " by cross board, this can be removed
Alarm in the time slot of the system port of veneer (if protection veneer insertion alarm in time slot within a period of time when initial,
Then now may be without alerting, without removing the alarm in time slot in time slot), while the system for no longer blocking this veneer
Port.After carrying out above operation, the passage of veneer is protected to carry out the preparation for undertaking business transmission, while the subnet of cross board connects
Connect protection to be also switched to business in the time slot of system port of protection veneer, then business switches to the passage for protecting veneer
It is upper to continue transmission.
The passage of protection veneer is normally undertaking business transmission and the passage of the veneer that works is normal, logical when protection veneer
When link failure occurs in road, its pretection switch process is ibid.
Business transmission is normally being undertaken in the passage of work veneer and the channel abnormal of veneer is being protected, or protection veneer
In the case that passage is normally undertaking the channel abnormal of business transmission and work veneer, if normally the link of transmission business goes out
Existing failure, is not carried out the process of pretection switch, and is only transmitted respective state to cross board.
In order that explanation becomes apparent from understanding, the agreement of the present invention can be described by state；Hereinafter state machine is made
Describe in detail.First several states to occurring in state machine are illustrated one by one：
In above-mentioned table, veneer is in work, and it is currently work veneer to refer to the veneer, and business is currently transmitted in the veneer,
It is currently protection veneer that veneer refers to the veneer in protection, and business is not transmitted on the veneer.
1) veneer state in which has four kinds, and respectively, in work without request, veneer is in protection without request, list for veneer
Plate is in work auto switching, and veneer is in protection auto switching.
The migration of single board state is the service condition by veneer itself and the single board service state with EPS groups together deciding on
, veneer periodically sends service condition to cross board by communication modes (such as HighWay lines) between plate, and cross board turns again
Issue another veneer of same EPS groups.And the service condition of veneer is then to be selected into the user port in EPS groups by veneer
The link detecting of 802.3MAC ports, or cross board determines to the situation of service condition transfer delay according to veneer in EPS groups
It is fixed.Each state is illustrated one by one below with reference to Fig. 2.
Business is normal：Veneer detection EPS group user ports 802.3MAC ports Link State be it is normal, and periodicity
This state value is sent to into cross board, cross board is received, judges that this single board state is normal for business.Simultaneously cross board can be by
This period of state is transmitted to another veneer of same EPS groups.The cycle can be 10ms, of the invention that this is not construed as limiting.
Service exception：In two kinds of situation, one is the Link State of the 802.3MAC ports of veneer detection EPS group user ports
To disconnect, and this state value is sent to into cross board periodically, cross board is received, and judges this single board state for service exception；
Two is that (suggestion 30ms, can set as desired) does not receive veneer transmission state value in one fixed response time of cross board, then intersect
Plate judges this single board state for service exception.The reason for causing one fixed response time of veneer not send this single board service state can be veneer
Power down, software fault etc..This period of state can be transmitted to cross board another veneer of same EPS groups.
With reference to Fig. 2, single board state is illustrated, primary veneer and standby board are fixed in Fig. 2, refer in particular to a certain list
Plate, work veneer and protection veneer are changes, if veneer is currently transmitting business, for the veneer that works, are otherwise guarantor
Shield veneer.Each state and its migration are illustrated below.
Veneer is in work, without solicited status：The original state of primary veneer, or this veneer currently be work veneer, and
And inquire this veneer (current for work veneer) and protect the service condition of veneer to be business normally, then trigger this veneer and move
Move on to this state or keep this state.Business transmission is undertaken in the veneer of this state, system port need to be stayed open and be removed
The alarm insertion of correspondence time slot.When the service condition for being unsatisfactory for this veneer (work veneer) and protection veneer, to be business normal
Condition when, single board state will be migrated according to state machine.
Veneer is in protection, without solicited status：Standby board original state, or this veneer is currently to protect veneer, and
The service condition for inquiring this veneer (protecting veneer) and work veneer is business normally, then trigger veneer and move to this shape
State keeps this state.Business transmission is not undertaken in the veneer of this state, system port need to be remained turned-off and be kept to correspondence
Time slot insertion alarm.When the service condition for being unsatisfactory for this veneer (protecting veneer) and work veneer is the normal condition of business
When, single board state will be migrated according to state machine.
Veneer is in work, auto switching：Primary veneer or standby board can move to this state.When veneer was originally
Work veneer, and inquire protection veneer be service exception when, will migrate into this state；When veneer was protection veneer originally, inquire about
It is normal to its business, and during work veneer service exception, will migrate into this state；When veneer original place in this state (be in work,
Auto switching), and when inquiring this veneer (work veneer) service exception, this state will be kept constant.In this state
Veneer need to undertake business transmission, need to stay open and the alarm insertion for keeping the corresponding time slot of removing system port.
Veneer is in protection, auto switching：Primary veneer or standby board can move to this state.When veneer was originally
Protection veneer, and inquire protection veneer be service exception when, will migrate into this state；When veneer was work veneer originally, inquiry
To its service exception, and when protecting single board service normal, will migrate into this state；When veneer original place in this state (in protection,
Auto switching), and when inquiring this veneer (protecting veneer) service exception, this state will be kept constant.In this state
Veneer does not undertake business transmission, system port need to be remained turned-off and be kept to correspondence time slot insertion alarm.
The present invention also provides a kind of Ethernet pretection switch and realizes system, including：Primary data cell, preliminary data unit
And cross board, the primary data cell is connected by system port with cross board；The preliminary data unit and cross board are logical
Cross system port to be connected, wherein：
The primary data cell or preliminary data unit are used for：When the data cell is carrying out business to be transmitted, such as
Fruit knows itself link exception, the insertion alarm in the time slot of its corresponding system port；
The cross board is used for：The time slot of the system port of the data cell of no alarm is selected to enter according to SNCP
Industry business transmission.
Wherein, the primary data cell or preliminary data unit are additionally operable to：When the data cell does not currently carry out business
Transmission, and when knowing the link exception of another data cell for carrying out business transmission, the number for not carrying out business transmission
The alarm in the time slot of its correspondence system port is removed according to unit.
Wherein, the primary data cell or preliminary data unit are additionally operable to：In the time slot of its corresponding system port
During insertion alarm, also block its corresponding system port.
Wherein, the primary data cell or preliminary data unit are additionally operable to：When the data cell does not currently carry out business
Transmission, and when knowing the link exception of another data cell for carrying out business transmission, the number for not carrying out business transmission
Its corresponding system port is opened also according to unit.
Wherein, the primary data cell or preliminary data unit are additionally operable to：Judge whether link is different by link detecting
Often, and by link-state information it is sent to cross board；
The cross board is additionally operable to：The link-state information of primary data cell or preliminary data unit feedback is received, will
The link-state information of primary data cell is sent to preliminary data unit, and the link-state information of preliminary data unit is sent
To primary data cell.
Wherein, the cross board is additionally operable to：The primary data cell or preliminary data unit are not received at the appointed time
Link-state information when, judge the data cell Link State exception and inform another data cell.
Obviously, those skilled in the art should be understood that each module or each step of the above-mentioned present invention can be with general
Computing device realizing, they can be concentrated on single computing device, or are distributed in multiple computing devices and are constituted
Network on, alternatively, they can be realized with the executable program code of computing device, it is thus possible to they are stored
In the storage device by computing device performing, or they are fabricated to each integrated circuit modules respectively, or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific
Hardware and software is combined.
Claims (8)
1. a kind of Ethernet pretection switch implementation method, it is characterised in that include：
In two data cells of Ethernet dual homed connection, the data cell for carrying out business transmission knows itself link exception
When, the insertion alarm in the time slot of its corresponding system port, cross board select the data of no alarm according to SNCP
The time slot of the system port of unit carries out business transmission；
When the current data cell for not carrying out business transmission knows that the link of the data cell for carrying out business transmission is abnormal, institute
State the current data cell for not carrying out business transmission and remove the alarm in the time slot of its correspondence system port；
The data cell for carrying out business transmission knows that itself link is normal and does not currently carry out the data cell of business transmission
When knowing that itself link is normal, the data cell for currently not carrying out business transmission is inserted in the time slot of its corresponding system port
Alarm, also blocks its corresponding system port.
2. the method for claim 1, it is characterised in that the data cell for currently not carrying out business transmission is known
When the link of the data cell of industry business transmission is abnormal, the data cell for currently not carrying out business transmission also opens its correspondence
System port.
3. method as claimed in claim 1 or 2, it is characterised in that methods described also includes：Described two data cells pass through
Link detecting judges whether link is abnormal, and link-state information is sent to the cross board, and the cross board will be per number
Another data cell being sent to according to the link-state information of unit in described two data cells.
4. method as claimed in claim 3, it is characterised in that methods described also includes：The cross board is at the appointed time not
When receiving the link-state information of a data cell in described two data cells, judge that the data cell Link State is different
Often and inform another data cell.
5. a kind of Ethernet pretection switch realizes system, it is characterised in that include：Primary data cell, preliminary data unit and
Cross board, the primary data cell are connected by system port with cross board；The preliminary data unit and cross board pass through
System port is connected, wherein：
The primary data cell or preliminary data unit are used for：When the data cell is carrying out business to be transmitted, if obtained
Know itself link exception, the insertion alarm in the time slot of its corresponding system port；
The cross board is used for：The time slot of the system port of the data cell of no alarm is selected to enter industry according to SNCP
Business transmission；
The primary data cell or preliminary data unit are additionally operable to：When the data cell does not currently carry out business transmission, and obtain
When knowing that the link of another data cell for carrying out business transmission is abnormal, the data cell for not carrying out business transmission is removed
Alarm in the time slot of its correspondence system port；
The primary data cell or preliminary data unit are additionally operable to：When the data cell is carrying out business transmission, and know
Itself link is normal and when knowing that the link of another data cell for currently not carrying out business transmission is normal, described currently not carry out
The data cell of business transmission inserts alarm in the time slot of its corresponding system port, also blocks its corresponding system port.
6. system as claimed in claim 5, it is characterised in that the primary data cell or preliminary data unit are additionally operable to：
When the data cell does not currently carry out business transmission, and know the link exception of another data cell for carrying out business transmission
When, the data cell for not carrying out business transmission also opens its corresponding system port.
7. the system as described in claim 5 or 6, it is characterised in that the primary data cell or preliminary data unit are also used
In：Judge whether link is abnormal by link detecting, and link-state information is sent to into cross board；
The cross board is additionally operable to：The link-state information of primary data cell or preliminary data unit feedback is received, will be primary
The link-state information of data cell is sent to preliminary data unit, and the link-state information of preliminary data unit is sent to master
Use data cell.
8. system as claimed in claim 7, it is characterised in that the cross board is additionally operable to：At the appointed time do not receive described
During the link-state information of primary data cell or preliminary data unit, judge the data cell Link State exception and inform another
One data cell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110095468.XA CN102739430B (en) | 2011-04-15 | 2011-04-15 | Method and system for realizing Ethernet protection switching |
| PCT/CN2012/072624 WO2012139452A1 (en) | 2011-04-15 | 2012-03-20 | Ethernet protection switching implementation method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110095468.XA CN102739430B (en) | 2011-04-15 | 2011-04-15 | Method and system for realizing Ethernet protection switching |
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| CN102739430A CN102739430A (en) | 2012-10-17 |
| CN102739430B true CN102739430B (en) | 2017-04-12 |
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| CN105656652A (en) * | 2014-11-14 | 2016-06-08 | 中兴通讯股份有限公司 | Service data flow transmission method and device |
| CN107395425A (en) * | 2017-07-31 | 2017-11-24 | 烽火通信科技股份有限公司 | A kind of flexibly Ethernet 1+1 protection switches implementation method |
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| CN1612531A (en) * | 2003-10-31 | 2005-05-04 | 华为技术有限公司 | Method for realizing shared guard ring misconnecting susppression for multiplexing section and system thereof |
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| CN101674240A (en) * | 2009-09-24 | 2010-03-17 | 中兴通讯股份有限公司 | Method and device for realizing single-node dual home for distributed system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012139452A1 (en) | 2012-10-18 |
| CN102739430A (en) | 2012-10-17 |
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