CN101827035A - Method for ensuring graceful restarting and dual master control network device - Google Patents
Method for ensuring graceful restarting and dual master control network device Download PDFInfo
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- CN101827035A CN101827035A CN201010176429A CN201010176429A CN101827035A CN 101827035 A CN101827035 A CN 101827035A CN 201010176429 A CN201010176429 A CN 201010176429A CN 201010176429 A CN201010176429 A CN 201010176429A CN 101827035 A CN101827035 A CN 101827035A
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Abstract
The invention aims at providing a method for ensuring graceful restarting and a dual master control network device for realizing the method, which can improve the graceful restarting success rate of a centralized-type dual master control network device. A graceful restarting proxy operates on a main-use master control board and a standby-use master control board of the dual master control network device; under normal conditions, the graceful restarting proxy on the main-use master control board periodically synchronizes graceful restarting messages that are transmitted to all neighbor devices through routing protocols to the standby-use master control board; and after main and standby switching is carried out, a graceful restarting proxy of a new main-use master control board transmits graceful restarting messages. After the main and standby switching of the dual master control device is carried out, the graceful restarting proxy directly transmits the graceful restarting messages to the neighbor devices without waiting for the operation of the routing protocols; therefore, the interval time for switching into the graceful restarting message transmitting is shortened.
Description
Technical field
The present invention relates to the communication technology of centralized network equipment, relate in particular to Graceful Restart (Graceful Restart the is called for short GR) technology of the centralized dual master control network equipment.
Background technology
The route switching network equipment is in the internet is interconnected, and the flow of bearing the internet is transmitted and important process such as routing forwarding.In order to guarantee the reliability of the network equipment, adopt the dual master control technology usually.A master control borad is in the main control board state in the network equipment of dual master control, and another master control borad is in the slave control board state.Be in charge of whole system by main control board, slave control board is then monitored the state of main control board.When main control board occurs when unusual, slave control board switches to main control board immediately, the adapter system.
The GR technology belongs to a kind of of reliability engineering, be widely used on the route switching network equipment, particularly have on the equipment of dual master control, be used for active and standby switching and system upgrade aspect, can guarantee when Routing Protocol is restarted that data normally transmit, thereby guarantee that the forwarding business do not interrupt.Routing Protocol relatively more commonly used at present is dynamic routing protocol such as open type shortest path priority protocol (Open Shortest Path Frist, be called for short OSPF), intermediate system to intermediate syst (IntermediateSystem-to-Intermediate System is called for short IS-IS) etc.When active and standby switching occurring; neighbours' vibration appears for fear of Routing Protocol; Routing Protocol needs in time to send a GR message to all neighbor devices; allow neighbor device know oneself and restart, make the neighborhood of this equipment and route keep within a certain period of time stablizing and keeping a long keep-alive time.Utilize this time, Routing Protocols such as OSPF, IS-IS just can be finished and switch the necessary initial work in back, recover normal condition then.Agreement restart finish after, neighbor device also assists it to carry out information (comprising various topologys, route and session information that the related protocol of supporting GR is safeguarded) synchronously, returns to the state before restarting in the short as far as possible time.By utilizing the GR technology can not produce route flapping in the Routing Protocol restarting process, message forwarding path is also without any change, and whole system can realize running without interruption.
Because it is unpredictable that main control board breaks down, so the GR message can only be after former slave control board switches to main control board, to send again.If the blanking time that handoff procedure and Routing Protocol put into operation is long, can cause GR message transmitting time late excessively, surpassed the normal keep-alive time of neighbours, can cause the GR failure, vibration appears in neighbours.
In order to address this problem, distributed apparatus generally adopts and send the GR message on ply-yarn drill.Because ply-yarn drill is to be in running status, does not need too many time always, therefore can in time send the GR message.
And, do not have CPU on the ply-yarn drill for centralized device, can't use this method.
Summary of the invention
Technical problem to be solved by this invention is, a kind of dual master control network equipment that guarantees the method for Graceful Restart and realize this method is provided, and can improve the success rate of centralized dual master control network equipment Graceful Restart.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be, guarantee the method for Graceful Restart, operation Graceful Restart agency on the active and standby master control borad on the dual master control network equipment, (active and standby master control borad ruuning situation is stable under the normal condition, the situation of active and standby switching does not take place), be equipped with on the master control borad by regular Routing Protocol is synchronized to the Graceful Restart message that all neighbor devices send of the agency of the Graceful Restart on the main control board, after the active and standby switching, by the Graceful Restart agency transmission Graceful Restart message of new main control board.
After the dual master control network equipment carries out active and standby switching, need not to wait for the Routing Protocol operation, the Graceful Restart agency directly sends the Graceful Restart message to neighbor device, has shortened switching to the blanking time that the Graceful Restart message sends.
Specifically may further comprise the steps:
All move the Graceful Restart agency on the main control board of a, the dual master control network equipment, the slave control board;
The Routing Protocol that moves on b, the main control board regularly sends the Graceful Restart message to neighbor device;
The described Graceful Restart message of the Graceful Restart that moves on c, main control board agency interception, and, discharge described Graceful Restart message with after the Graceful Restart message is synchronously to the slave control board;
The Graceful Restart agency who moves on d, the slave control board preserves the Graceful Restart message of coming synchronously;
E, after the dual master control network equipment carries out active and standby switching, the Graceful Restart that moves on new main control board agency sends the Graceful Restart message the preserved neighbor device to this dual master control network equipment.
Concrete, the Routing Protocol that moves on the main control board among the step a is that each interface is to Agent ID of Graceful Restart agent application; The Graceful Restart agency is the different Agent ID of each interface assignment at different routing protocol;
When Routing Protocol withdrawed from interface, Routing Protocol was cancelled this interface to Agent ID that should Routing Protocol to the Graceful Restart agent application; Graceful Restart agency cancellation is the Agent ID of this Routing Protocol in this interface assignment.
Concrete, the interface of the Graceful Restart agent monitors dual master control network equipment drives among the step c, by recognition agent ID the Graceful Restart message is tackled.
Further, among the step c Graceful Restart agency with the Graceful Restart message with the transmission interface ID of this message, Agent ID synchronously to slave control board.
Concrete, steps d specifically may further comprise the steps:
D1, Graceful Restart agency receive the Graceful Restart message of coming synchronously, and whether the Agent ID of searching this Graceful Restart message exists, in this way, enters steps d 3; As not, enter steps d 2;
D2, write down this Agent ID after, enter steps d 3;
D3, renewal GR message and transmission interface ID.
Concrete, among the step e, after the dual master control network equipment carries out active and standby switching, the Agent ID of coming synchronously of the Graceful Restart agency traversal preservation immediately that moves on the new main control board, extract the transmission interface ID and the Graceful Restart message of Agent ID correspondence, the Graceful Restart message is sent on the interface of transmission interface ID correspondence.
The dual master control network equipment, comprise main control board, slave control board, included the Routing Protocol module in main control board, the slave control board, also include the Graceful Restart proxy module in main control board, the slave control board, described Graceful Restart proxy module is used for, and carries out active and standby switching back at the dual master control network equipment and sends the Graceful Restart message.
Routing Protocol module in the main control board is used for, and regularly sends the Graceful Restart message;
Graceful Restart proxy module in the main control board is used for, the Graceful Restart message that interception main control board Routing Protocol module sends, and, discharge described Graceful Restart message with after described Graceful Restart message is synchronously to the slave control board;
Graceful Restart proxy module in the slave control board is used for, and preserves the Graceful Restart message of coming synchronously; After active and standby switching takes place, send the neighbor device of the Graceful Restart message of preservation to this dual master control network equipment.
Further, the Routing Protocol module in the main control board also is used for, for each interface to Agent ID of Graceful Restart proxy module application; When Routing Protocol withdraws from interface, cancel this interface to Agent ID that should Routing Protocol to the application of Graceful Restart proxy module;
Described Graceful Restart proxy module also is used for, and is each interface assignment Agent ID at different routing protocol; When Routing Protocol withdraws from interface, cancel and be the Agent ID of this Routing Protocol in this interface assignment.
Further, the Graceful Restart proxy module in the main control board also is used for, and the interface of the monitoring dual master control network equipment drives, and by recognition agent ID the Graceful Restart message is tackled.
Further, the Graceful Restart proxy module in the main control board also is used for, in synchronous Graceful Restart message, with the transmission interface ID of Graceful Restart message correspondence, Agent ID together synchronously to slave control board.
Further, the Graceful Restart proxy module in the slave control board also is used for, and behind the Graceful Restart message that reception is come synchronously, whether the Agent ID of searching this Graceful Restart message exists, in this way, upgrades the Graceful Restart message and the transmission interface ID that preserve; As not, write down this Agent ID after, upgrade the Graceful Restart message and the transmission interface ID that preserve.
Further, Graceful Restart proxy module in the main control board also is used for, after the dual master control network equipment carries out active and standby switching, the Agent ID of coming synchronously of traversal preservation immediately, extract the transmission interface ID and the Graceful Restart message of Agent ID correspondence, the Graceful Restart message is sent on the interface of transmission interface ID correspondence.
The invention has the beneficial effects as follows, shortened the time that the Graceful Restart message sends that is substituted into, improve the Graceful Restart success rate of dual master control centralized network equipment, guarantee the uninterrupted forwarding of running.
Description of drawings
Fig. 1 is the schematic diagram of the dual master control network equipment of the present invention.
Fig. 2 is the embodiment flow chart.
Fig. 3 is the Agent ID data structure schematic diagram that embodiment uses.
Fig. 4 is that GR proxy module on the slave control board of embodiment is to the handling process of synchronizing information.
Embodiment
As shown in Figure 1, the dual master control network equipment comprises main control board, slave control board, has included the Routing Protocol module in main control board, the slave control board, also includes the GR proxy module in main control board, the slave control board;
Routing Protocol module in the main control board is used for, and regularly sends the GR message;
GR proxy module in the main control board is used for, the GR message that interception main control board Routing Protocol module sends, and, discharge described GR message with after described GR message is synchronously to the slave control board; After the dual master control network equipment carries out active and standby switching, send the neighbor device of the GR message of preservation to this dual master control network equipment;
GR proxy module in the slave control board is used for, and preserves the GR message of coming synchronously.
With first master control borad is main control board, and second master control borad is a slave control board, and second master control borad is a main control board after the active and standby switching, and first master control borad is that slave control board is an example, the implementation method of Graceful Restart as shown in Figure 2:
The GR proxy module of first master control borad carries out Agent ID and distributes;
The Routing Protocol module of first master control borad sends the GR message, is tackled by the GR proxy module of first master control borad;
The GR proxy module of first master control borad synchronously to the GR proxy module of second master control borad, is preserved synchronously next GR message by the GR proxy module of second master control borad with the GR message;
After active and standby switching occurring, send the GR message preserved to neighbours as the GR proxy module of second master control borad of main control board.
The GR proxy module replaces the Routing Protocol module to send the GR message after switching.The GR proxy module need be finished following work:
1. Agent ID distributes.2.GR packet sampling.3.GR message is synchronous.4.GR message sends.
Agent ID distributes: can send multiple GR message on the network equipment, and different Routing Protocols, its GR message is inequality.Same Routing Protocol operates on the different interfaces, and the also possible difference of the GR message that sends on each interface (such as: the source MAC of message is inequality).Be each GR message, the GR proxy module can distribute an Agent ID, and each Agent ID only can be preserved a GR message.High as shown in Figure 34 of Agent ID form is used to distinguish agreement.Low 28 instance of agent that are used to distinguish each agreement.
The OSPF that moves on the main control board, Routing Protocols such as IS-IS operations, need for each runnable interface to Agent ID of GR proxy module application, agreement need be noted the corresponding relation of Agent ID with interface.When Routing Protocol withdrawed from certain interface operation, the Routing Protocol module equally need be to GR proxy module cancellation Agent ID.Legal Agent ID is one non-0 a numerical value.
The Routing Protocol module application of main control board regularly sends the GR message on each runnable interface behind Agent ID, the GR proxy module of main control board is tackled these GR messages, and this process is called the GR packet sampling.Routing Protocol every 3 HELLO cycles, sends a GR message on each runnable interface.When Routing Protocol sent message, for normal message, Agent ID filled in 0; For the GR message, Agent ID is filled in the Agent ID of runnable interface correspondence.Message data is then filled in protocol massages according to standard.
GR packet sampling: carried message structure process agreement, network layer, link layer in system of message data, arrived driving.The GR proxy module drives the message of each transmission of monitoring at interface.For Agent ID is 0 message, does not tackle, and sends; Message for non-0 is synchronized to message data from MPU, and message is discharged, and forbids sending.
The GR message is synchronous: main control board the GR proxy module after intercepting the GR message, the GR message need be synchronized to slave control board.
Slave control board the GR proxy module receive sync message after, handle as shown in Figure 4:
The GR agency receives the GR message of coming synchronously, and whether the Agent ID of searching this GR message exists, in this way, upgrades GR message and transmission interface ID; As not, write down this Agent ID after, upgrade GR message and transmission interface ID.
The GR message sends: after active and standby switching took place, former slave control board changed main control board into, the adapter system.The GR proxy module of new main control board travels through the Agent ID record of coming synchronously immediately.The transmission interface ID and the GR message of GR message have been preserved in the Agent ID record of new as previously mentioned main control board.The GR proxy module of main control board sends the GR message on the interface of correspondence, notify neighbours GR to take place.In order to guarantee the reliable transmission of message, each GR message sends 3 times, each 10 seconds at interval.
By above description as can be seen, the method provided by the invention and the dual master control network equipment can be when the main control board operate as normal, and the GR proxy module by main control board is synchronized to slave control board with the GR message of agreement.After principal and subordinate's switching took place, new main main control board need not to wait for the Routing Protocol operation, and directly the GR message with backup sends to neighbours, has shortened switching to the blanking time that the GR message sends, and has improved the success rate of GR.
Claims (10)
1. guarantee the method for Graceful Restart, it is characterized in that, operation Graceful Restart agency on the active and standby master control borad on the dual master control network equipment, under the normal condition, the agency regularly is synchronized to Routing Protocol on the slave control board to the Graceful Restart message that all neighbor devices send by the Graceful Restart on the main control board, after the active and standby switching, by the Graceful Restart agency transmission Graceful Restart message of new main control board.
2. guarantee the method for Graceful Restart according to claim 1, it is characterized in that, specifically may further comprise the steps:
All move the Graceful Restart agency on the main control board of a, the dual master control network equipment, the slave control board;
The Routing Protocol that moves on b, the main control board regularly sends the Graceful Restart message to neighbor device;
The described Graceful Restart message of the Graceful Restart that moves on c, main control board agency interception, and, discharge described Graceful Restart message with after the Graceful Restart message is synchronously to the slave control board;
The Graceful Restart agency who moves on d, the slave control board preserves the Graceful Restart message of coming synchronously;
E, after the dual master control network equipment carries out active and standby switching, the Graceful Restart that moves on new main control board agency sends the Graceful Restart message the preserved neighbor device to this dual master control network equipment.
3. as the method for assurance Graceful Restart as described in the claim 2, it is characterized in that, the Routing Protocol that moves on the main control board among the step a for each interface to Agent ID of Graceful Restart agent application; The Graceful Restart agency is the different Agent ID of each interface assignment at different routing protocol;
When Routing Protocol withdrawed from interface, Routing Protocol was cancelled this interface to Agent ID that should Routing Protocol to the Graceful Restart agent application; Graceful Restart agency cancellation is the Agent ID of this Routing Protocol in this interface assignment.
4. as the method for assurance Graceful Restart as described in the claim 3, it is characterized in that, among the step c Graceful Restart agency with the Graceful Restart message with the transmission interface ID of this message, Agent ID synchronously to slave control board.
5. as the method for assurance Graceful Restart as described in the claim 4, it is characterized in that steps d specifically may further comprise the steps:
D1, Graceful Restart agency receive the Graceful Restart message of coming synchronously, and whether the Agent ID of searching this Graceful Restart message exists, in this way, enters steps d 3; As not, enter steps d 2;
D2, write down this Agent ID after, enter steps d 3;
D3, renewal Graceful Restart message and transmission interface ID.
6. as the method for assurance Graceful Restart as described in the claim 4, it is characterized in that, among the step e, after the dual master control network equipment carries out active and standby switching, the Agent ID of coming synchronously of the Graceful Restart agency traversal preservation immediately that moves on the new main control board, extract the transmission interface ID and the Graceful Restart message of Agent ID correspondence, the Graceful Restart message is sent on the interface of transmission interface ID correspondence.
7. the dual master control network equipment, comprise main control board, slave control board, included the Routing Protocol module in main control board, the slave control board, it is characterized in that, also include the Graceful Restart proxy module in described main control board, the slave control board, described Graceful Restart proxy module is used for, and carries out active and standby switching back at the dual master control network equipment and sends the Graceful Restart message.
8. as the dual master control network equipment as described in the claim 7, it is characterized in that the Routing Protocol module in the main control board is used for, and regularly sends the Graceful Restart message;
Graceful Restart proxy module in the main control board is used for, the Graceful Restart message that interception main control board Routing Protocol module sends, and, discharge described Graceful Restart message with after described Graceful Restart message is synchronously to the slave control board;
Graceful Restart proxy module in the slave control board is used for, and preserves the Graceful Restart message of coming synchronously; After active and standby switching takes place, send the neighbor device of the Graceful Restart message of preservation to this dual master control network equipment.
9. as the dual master control network equipment as described in the claim 8, it is characterized in that the Routing Protocol module in the described main control board also is used for, for each interface to Agent ID of Graceful Restart proxy module application; When Routing Protocol withdraws from interface, cancel this interface to Agent ID that should Routing Protocol to the application of Graceful Restart proxy module;
Described Graceful Restart proxy module also is used for, and is each interface assignment Agent ID at different routing protocol; When Routing Protocol withdraws from interface, cancel and be the Agent ID of this Routing Protocol in this interface assignment.
10. as the dual master control network equipment as described in the claim 9, it is characterized in that, Graceful Restart proxy module in the main control board also is used for, in synchronous Graceful Restart message, with the transmission interface ID of Graceful Restart message correspondence, Agent ID together synchronously to slave control board.
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| CN102081540A (en) * | 2011-01-18 | 2011-06-01 | 杭州华三通信技术有限公司 | Distributed dual-master control network equipment software updating method and device |
| CN102307194A (en) * | 2011-08-18 | 2012-01-04 | 杭州华三通信技术有限公司 | Graceful restarting method and device for universal protocol process |
| CN103166847A (en) * | 2011-12-09 | 2013-06-19 | 迈普通信技术股份有限公司 | Method and device for ensuring graceful restart |
| CN104243305A (en) * | 2014-09-28 | 2014-12-24 | 福建星网锐捷网络有限公司 | Fault processing method and device of multicast service |
| JP2018133766A (en) * | 2017-02-17 | 2018-08-23 | 三菱電機株式会社 | Processing apparatus, duplex system, processing method, and processing program |
| CN111835886A (en) * | 2020-08-06 | 2020-10-27 | 南京航空航天大学 | Processing method and device for manufacturing address resolution protocol packet in Internet of things gateway |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102081540A (en) * | 2011-01-18 | 2011-06-01 | 杭州华三通信技术有限公司 | Distributed dual-master control network equipment software updating method and device |
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| CN103166847B (en) * | 2011-12-09 | 2016-03-09 | 迈普通信技术股份有限公司 | Ensure the method and apparatus of Graceful Restart |
| CN104243305A (en) * | 2014-09-28 | 2014-12-24 | 福建星网锐捷网络有限公司 | Fault processing method and device of multicast service |
| JP2018133766A (en) * | 2017-02-17 | 2018-08-23 | 三菱電機株式会社 | Processing apparatus, duplex system, processing method, and processing program |
| CN111835886A (en) * | 2020-08-06 | 2020-10-27 | 南京航空航天大学 | Processing method and device for manufacturing address resolution protocol packet in Internet of things gateway |
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