CN105763442A - PON system and method avoiding interruption of LACP aggregation link in main-standby switching process - Google Patents
PON system and method avoiding interruption of LACP aggregation link in main-standby switching process Download PDFInfo
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- CN105763442A CN105763442A CN201610231073.0A CN201610231073A CN105763442A CN 105763442 A CN105763442 A CN 105763442A CN 201610231073 A CN201610231073 A CN 201610231073A CN 105763442 A CN105763442 A CN 105763442A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
- H04L45/245—Link aggregation, e.g. trunking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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Abstract
The invention discloses a PON system and method avoiding interruption of an LACP aggregation link in a main-standby switching process, and relates to the technical field of communication. The PON system comprises a main system control unit, a standby system control unit and an upper connecting disk. Both the main system control unit and the standby system control unit are connected with the upper connecting disk. LACP protocol messages are sent and received between the main system control unit and an opposite end device through the upper connecting disk. The system IDs in the LACP protocol messages sent by the main system control unit and the standby system control unit are identical, and the physical state of the upper connecting port on the standby system control unit is an UP state. According to the invention, the LACP aggregation link can be prevented against interruption before and after main-standby switching, and the user service in the main-standby switching process is prevented from being influenced.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of masterslave switchover unbroken PON system of LACP aggregated links and method.
Background technology
Link aggregation (LinkAggregation) is a kind of technology that multiple physical ports are bundled into a logic port.Multiple physical connections can be used as a single logic connection and process by this technology, it is allowed to by multiple port parallel joins between two network equipments, transmit data simultaneously, to provide higher bandwidth and handling capacity, improve system stability.According to whether member port runs LACP (LinkAggregationControlProtocol, link aggregate control protocol) agreement, it is possible to link aggregation to be divided into static polymerization and dynamic aggregation both of which.
LACP agreement is a kind of to realize the agreement that link dynamically converges, LACP agreement passes through LACPDU (LinkAggregationControlProtocolDataUnit, link aggregate control protocol data cell) and opposite end interactive information, equipment for exchanging data provides the negotiation mode of a kind of standard, and LACP agreement forms aggregated links according to the configuration (i.e. speed, duplex, basic configuration, management Key etc.) of device port and starts aggregated links transceiving data.LACP link aggregation has the increase network bandwidth, improves the advantage such as network connection reliability, load balancing flow.Along with developing rapidly of network communications technology, LACP link aggregation technology is more and more applied in data transmission procedure.LACP agreement is a kind of data link layer protocol, is mainly used in the physical connection between equipment, and LACP aggregated links is commonly used to the business such as voice-bearer, data, video；Ensure that LACP agreement is properly functioning to have a very important role with link stability.
In order to improve the stability of system, PON (PassiveOpticalNetwork, passive optical-fiber network) PON system is commonly designed 2 SCU (SystemControlUnit, system control unit), two SCU are connected with upper united dish respectively, and connect the transmission link between frame respectively.For in united dish provides data message mutual, the operation that two SCU can be independent, united dish offer data message forwarding respectively be provided；In the control of the system of execution, a SCU is master, and another SCU is standby dish, master be controlled, and standby dish is as backup hardware, and the active and standby role of two SCU can change mutually, can carry out masterslave switchover.Masterslave switchover is in primary SCU operation troubles, unexpected power down or edition upgrading situation, it is possible to ensureing that communication equipment is properly functioning, business is not interrupted, and it is for safeguarding the stability of network, ensures that customer service is unaffected etc. and has important function.
Master carries out switching front and back, and for General Physics link, data exchange can be pass by rapidly by system.And owing to master uses MAC Address different with standby dish, before and after masterslave switchover, system sends the MAC Address of message use and changes, and LACP agreement needs to reappear holds consultation with opposite equip., can cause that LACP polymeric chain interrupts several seconds, thus affect the business such as the online of user, voice-and-data.
Summary of the invention
For the defect existed in prior art, it is an object of the invention to provide the unbroken PON system of LACP aggregated links before and after a kind of guarantee masterslave switchover.
For reaching object above, the present invention adopts the technical scheme that: a kind of PON system, for setting up LACP agreement with opposite equip., it includes active system control unit, back-up system control unit and upper united dish, described active system control unit is all connected with described upper united dish with back-up system control unit, sent by described first line of a couplet hair updo between described active system control unit and opposite equip. and receive LACP protocol massages, described active system control unit is identical with the system identifier in the LACP protocol massages that back-up system control unit sends, and the first line of a couplet ports physical state in described back-up system control unit is UP state.
On the basis of technique scheme, described active system control unit adopts identical virtual mac address with the LACP agreement of back-up system control unit.
On the basis of technique scheme, described virtual mac address when starting with described PON system the MAC Address of described active system control unit identical.
Meanwhile, the present invention also provides for a kind of unbroken method of LACP aggregated links before and after guarantee masterslave switchover, and for reaching above-mentioned purpose, the present invention adopts the technical scheme that: a kind of masterslave switchover unbroken method of LACP aggregated links, and the method includes:
The physical state of the first line of a couplet port in back-up system control unit is adjusted to UP state by DOWN state, makes active system control unit and back-up system control unit all can receive, by upper united dish, the LACP protocol massages that opposite equip. sends；
System identifier in the LACP protocol massages that unified active system control unit and back-up system control unit send；
Configuration LACP aggregated links, and enable LACP functional switch, make active system control unit and back-up system control unit all consult successfully with opposite equip.；
Perform masterslave switchover.
On the basis of technique scheme, the system identifier in the LACP protocol massages that described active system control unit adopts identical virtual mac address that described active system control unit is sent with back-up system control unit with the LACP agreement of back-up system control unit is unified mutually.
On the basis of technique scheme, the MAC Address of described active system control unit when described virtual mac address adopts described PON system to start.
On the basis of technique scheme, if described active system control unit and back-up system control unit do not use virtual mac address, then open virtual mac address function.
On the basis of technique scheme, if the physical state of the first line of a couplet port in described back-up system control unit is not UP state, then uses and support double; two upper united dish sending out function.
On the basis of technique scheme, if described back-up system control unit fails to receive the LACP protocol massages that described opposite equip. sends, then confirm that described upper united dish double; two are transported to put and whether come into force.
On the basis of technique scheme, if described back-up system control unit is not consulted successfully with opposite equip., then check the configuration of network environment and LACP.
Compared with prior art, it is an advantage of the current invention that:
(1) PON system of the present invention is provided with and opens double; two configuration sending out operation, and upper united dish supports double; two to send out functions, thus active system control unit and back-up system control unit all can receive, by upper united dish, the LACP message that opposite equip. sends, active system control unit and back-up system control unit all can be consulted successfully with opposite equip..Additionally due to active system control unit adopts identical virtual mac address with the LACP agreement of back-up system control unit, can ensure that message before and after PON system masterslave switchover is from same equipment, making before and after masterslave switchover, opposite equip. cannot perceive this equipment and carry out masterslave switchover.
(2) MAC Address of active system control unit when the active system control unit of the present invention and the virtual mac address of back-up system control unit adopt PON system to start such that it is able to avoid the MAC Address with other equipment to conflict.
Accompanying drawing explanation
Fig. 1 is LACP protocol massages interaction figure in the present invention；
Fig. 2 is the flow chart of the unbroken method of masterslave switchover LACP aggregated links in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Shown in Figure 1, the present invention provides a kind of masterslave switchover unbroken PON system of LACP aggregated links, and this PON system and opposite equip. are held consultation by LACP protocol massages, and by system identifier in LACP message, different equipment are made a distinction.PON system in the present invention includes active system control unit, back-up system control unit and upper united dish, and wherein active system control unit is master, and back-up system control unit is standby dish.Under normal circumstances, LACP system identifier uses system MAC Address and system priority to be identified, and active system control unit is different with the MAC Address of back-up system control unit.For guaranteeing that message before and after PON system masterslave switchover is from same equipment, need identical for this active system control unit with the system identifier in the LACP protocol module of back-up system control unit, unified use virtual mac address, in order to avoid virtual mac address conflicts with the MAC Address of other equipment, virtual mac address takes the MAC Address of active system control unit during system start-up.Back-up system control unit is when restarting, from active system control unit synchronization virtual mac address to back-up system control unit, it is ensured that the MAC Address that active system control unit uses with the LACP agreement of back-up system control unit is identical.
Owing in default situations, the first line of a couplet port status in back-up system control unit is down, the message that the first line of a couplet port of upper united dish receives only can send it to active system control unit, will not be sent to back-up system control unit.In order to allow back-up system control unit be able to receive that LACP message, it is ensured that LACP protocol state machine is properly functioning, the PON system support in the present invention is to the double; two configuration sending out function of upper united dish, and keeps being configured to data base.The upper united dish of PON system open double; two send out functions after, the first line of a couplet ports physical state of back-up system control unit is UP, now goes up the message that united dish receives and can deliver to back-up system control unit.Owing to back-up system control unit has the configuration data of LACP, after opening LACP, the state machine of LACP agreement brings into operation, back-up system control unit is periodically to driving transmission LACP protocol massages, although message cannot be sent by back-up system control unit, but active system control unit can substitute for back-up system control unit and completes the mutual of LACP protocol massages with opposite equip..Owing to the LACP agreement of active system control unit and back-up system control unit uses same virtual mac address, the LACP protocol massages that active system control unit and back-up system control unit send is identical, back-up system control unit can receive message normally and send message, so that the LACP agreement normal operation of back-up system control unit.
Although the LACP protocol state machine normal operation in back-up system control unit, and lower forwarding list item is to the exchange chip of back-up system control unit, but back-up system control unit be not involved in real data and forward.After masterslave switchover, back-up system control unit replaces active system control unit transmission LACP protocol massages immediately and holds consultation with opposite equip., keeps the connectedness of aggregated links.The time that usual masterslave switchover consumes is very short, within being typically in 50ms, and LACP agreement is a kind of slow agreement, opposite equip. LACP time-out time is 3s during short cycle, is 90s, during long period in the interval of masterslave switchover, peer switches will not perceive, LACP aggregated links need not be consulted again, thus the business such as the multicast carried in LACP aggregated links, voice, video will not be interrupted, maintains the connectedness of LACP aggregated links before and after masterslave switchover.
Below in conjunction with accompanying drawing, the masterslave switchover unbroken method of LACP aggregated links of the present invention is explained in detail:
It is illustrated in figure 2 the handling process of the masterslave switchover unbroken method of LACP aggregated links proposed by the invention, implements step as follows:
S1. opening the double; two of upper united dish and send out function, namely increase in PON system and open the double; two configuration sending out function of first line of a couplet port, this configuration uses data base to preserve, and supports that active and standby synchronization and configuration recover.
The active system control unit of S2.PON system passes through transmitting order to lower levels, after opening double; two the functions specifying first line of a couplet port, upper united dish resolves after receiving the configuration message enabling double; two functions of first line of a couplet port that main control unit issues, by CPID (computerprogramintegrateddocument, Computer Programme Integral Document) its value is issued to depositor, make the physical state of the first line of a couplet port in back-up system control unit be become UP from DOWN.If the physical state of the first line of a couplet port in back-up system control unit is not UP state, then uses and support double; two upper united dish sending out function.
S3. the physical state of the first line of a couplet port in back-up system control unit is after UP state, determines whether that can back-up system control unit receive the LACP protocol massages that opposite equip. sends.If back-up system control unit can not receive the LACP protocol massages that opposite equip. sends, then confirm that upper united dish double; two are transported to put whether to come into force, it is ensured that the CPU of active system control unit and back-up system control unit all can receive the LACP message of opposite equip. transmission by upper united dish.
If S4. back-up system control unit can receive the LACP protocol massages that opposite equip. sends, determine whether whether LACP agreement uses virtual mac address, if LACP agreement does not use virtual mac address, then open virtual mac address function, by allowing the system identifier in the LACP protocol massages that the LACP agreement of active system control unit and back-up system control unit adopts identical virtual mac address to make active system control unit send with back-up system control unit unify mutually.
PON system supports that the control switch of LACP Protocol virtual MAC Address is arranged, enable virtual mac address switchs, system identifier in the LACP protocol massages that active system control unit and back-up system control unit send after reunification, from active system control unit with the CPU of the back-up system control unit LACP protocol massages sent by identical.The LACP message that cannot be sent by CPU due to back-up system control unit exchange chip sends, and active system control unit replaces back-up system control unit and opposite equip. to complete the mutual of LACP protocol massages.
If S5. LACP agreement is already with virtual mac address, determine whether whether the LACP agreement of back-up system control unit is polymerized successfully, if the LACP agreement of back-up system control unit is not polymerized successfully, then check the configuration of network environment and LACP.
When after the LACP protocol aggregation success of active system control unit, owing to LACP agreement uses virtual mac address, the LACP message that active system control unit sends is identical with the protocol massages that back-up system control unit sends, and back-up system control unit is by receiving and sending LACP message between active system control unit to opposite equip..Function is sent out owing to the first line of a couplet port open of PON system is double; two, active system control unit and back-up system control unit all can receive the LACP protocol massages that opposite equip. sends over, so, LACP agreement in active system control unit and back-up system control unit receives and sends LACP message normally, all can consult successfully with opposite equip..LACP state machine normal operation in active system control unit and back-up system control unit, member port all can be polymerized in groups, and issues hardware table item to exchange chip.Active system control unit is identical with the LACP protocol state machine state in back-up system control unit, and the hardware table item being issued to exchange chip is identical, the difference is that, the list item in back-up system control unit is not involved in business datum and forwards.
If the LACP protocol aggregation success of S6. back-up system control unit, then carry out masterslave switchover, and observe aggregated links whether disconnect, customer service whether abnormal.
Owing to the time of masterslave switchover is very short, generally within 50ms, before masterslave switchover, the member port of the LACP in back-up system control unit has been polymerized in groups, and issue driving list item, after masterslave switchover, back-up system control unit is upgraded to active system control unit immediately, all identical with active system control unit owing to switching LACP protocol status in front back-up system control unit, hardware table item, now need not re-start negotiation, it is thus only necessary to periodically occur LACP protocol massages can safeguard the connectedness of aggregated links.When active system control unit is restarted, LACP virtual mac address can be synchronized from current active system control unit and control switch and address, double; two being transported to of LACP configuration data, upper united dish is put, and becomes back-up system control unit, be able to receive that the LACP protocol massages that opposite equip. sends equally after startup.LACP protocol state machine normal operation, and issue polymerization list item information to exchange chip.
In sum, before and after masterslave switchover, opposite equip. will not perceive the interruption of masterslave switchover short time, and LACP aggregated links will not disconnect, the business such as the voice of user, data and the video that carry in corresponding aggregated links are unaffected, and have ensured that masterslave switchover customer service is unaffected.
The present invention is not limited to above-mentioned embodiment, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, and these improvements and modifications are also considered as within protection scope of the present invention.The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. the masterslave switchover unbroken PON system of LACP aggregated links, for setting up LACP agreement with opposite equip., it includes active system control unit, back-up system control unit and upper united dish, described active system control unit is all connected with described upper united dish with back-up system control unit, sent by described first line of a couplet hair updo between described active system control unit and opposite equip. and receive LACP protocol massages, it is characterized in that: described active system control unit is identical with the system identifier in the LACP protocol massages that back-up system control unit sends, and the first line of a couplet ports physical state in described back-up system control unit is UP state.
2. the masterslave switchover unbroken PON system of LACP aggregated links as claimed in claim 1, it is characterised in that: described active system control unit adopts identical virtual mac address with the LACP agreement of back-up system control unit.
3. the masterslave switchover unbroken PON system of LACP aggregated links as claimed in claim 2, it is characterised in that: described virtual mac address when starting with described PON system the MAC Address of described active system control unit identical.
4. the masterslave switchover unbroken method of LACP aggregated links, it is characterised in that the method includes:
The physical state of the first line of a couplet port in back-up system control unit is adjusted to UP state by DOWN state, makes active system control unit and back-up system control unit all can receive, by upper united dish, the LACP protocol massages that opposite equip. sends；
System identifier in the LACP protocol massages that unified active system control unit and back-up system control unit send；
Configuration LACP aggregated links, and enable LACP functional switch, make active system control unit and back-up system control unit all consult successfully with opposite equip.；
Perform masterslave switchover.
5. the masterslave switchover unbroken method of LACP aggregated links as claimed in claim 4, it is characterised in that: described active system control unit adopts identical virtual mac address with the LACP agreement of back-up system control unit.
6. the masterslave switchover unbroken method of LACP aggregated links as claimed in claim 5, it is characterised in that: the MAC Address of described active system control unit when described virtual mac address adopts described PON system to start.
7. the masterslave switchover unbroken method of LACP aggregated links as claimed in claim 5, it is characterised in that: if described active system control unit and back-up system control unit do not use virtual mac address, then open virtual mac address function.
8. the masterslave switchover unbroken method of LACP aggregated links as claimed in claim 4, it is characterised in that: if the physical state of the first line of a couplet port in described back-up system control unit is not UP state, then uses and support double; two upper united dish sending out function.
9. the masterslave switchover unbroken method of LACP aggregated links as claimed in claim 8, it is characterized in that: if described back-up system control unit fails to receive the LACP protocol massages that described opposite equip. sends, then confirm that described upper united dish double; two are transported to put and whether come into force.
10. the masterslave switchover unbroken method of LACP aggregated links as claimed in claim 4, it is characterised in that: if described back-up system control unit is not consulted successfully with opposite equip., then check the configuration of network environment and LACP.
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| CN107277652A (en) * | 2017-05-27 | 2017-10-20 | 烽火通信科技股份有限公司 | Across the disk LACP link aggregation methods and device of PON access systems |
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| CN111181845B (en) * | 2019-12-31 | 2022-03-15 | 苏州盛科通信股份有限公司 | Method for realizing LACP (Master-slave high availability) and LACP-based stacking system |
| CN111586503A (en) * | 2020-04-13 | 2020-08-25 | 烽火通信科技股份有限公司 | Method and device for realizing three-layer service load sharing of access system |
| CN111586503B (en) * | 2020-04-13 | 2022-06-03 | 烽火通信科技股份有限公司 | Method and device for realizing three-layer service load sharing of access system |
| CN111586505A (en) * | 2020-04-26 | 2020-08-25 | 烽火通信科技股份有限公司 | Method and device for realizing rapid recovery of main/standby switching service in PON access system |
| CN111586505B (en) * | 2020-04-26 | 2022-04-08 | 烽火通信科技股份有限公司 | Method and device for realizing rapid recovery of main/standby switching service in PON access system |
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