CN101404568A - Double-network card hot backup redundancy method - Google Patents
Double-network card hot backup redundancy method Download PDFInfo
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- CN101404568A CN101404568A CNA2008102351948A CN200810235194A CN101404568A CN 101404568 A CN101404568 A CN 101404568A CN A2008102351948 A CNA2008102351948 A CN A2008102351948A CN 200810235194 A CN200810235194 A CN 200810235194A CN 101404568 A CN101404568 A CN 101404568A
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Abstract
The invention relates to a double-network card hot backup redundancy method which comprises the following steps: two network cards of each machine are respectively connected to two exchanges in a network topology; the two exchanges are subject to inter-cascade connection; a network card monitoring a program sends messages to the exchanges and accepts answers using the IP address of the working network card, if a plurality of continuous messages receive no answer after a certain time interval, the working network card or a network device is judged to have fault, the system sends out a warning signal, records warning state, and switches the IP address to a backup network card; and when the working network card returns to be normal, the original IP address is switched to the working network card. The method can realize automatic switching when a certain working network card or a network device or an exchange has fault; and can switch back when the working network card returns to be normal, the switching program automatically executes, and the method can alarm and record faults, which perfectly solves the problem of cross faults.
Description
Technical field
The present invention relates to a kind of double-network card hot backup redundancy method of server, be used for the supervision and the communication management of network communication equipment state, belong to the telecommunication management technical field.
Background technology
Server now generally all has two or polylith network interface card, and certain operations system such as IBM, SUN can use the software that carries with the network interface card polymerization, reach the purpose of hot backup redundancy.These polymerization softwares belong to the part of operating system, need to rely on the support of operating system, and some softwares also need rely on the support of switch.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of double-network card hot backup redundancy method that is operated in the high reliability and the high availability of application layer, do not rely on concrete operating system and switch, be applicable to various UNIX and (SuSE) Linux OS.The present invention is responsible for the supervision and the communication management of network communication equipment state, and normal operation of assurance system and data are not lost under the situation that also has any network card equipment operate as normal, thereby reach the purpose that guarantees the network service reliability.
To achieve the above object of the invention, the present invention adopts following technical scheme to realize:
The function that the present invention realizes comprises two parts: the hot backup redundancy function of (1) network interface card fault detection capability and (2) two network interface cards.
Technical scheme of the present invention: a kind of double-network card hot backup redundancy method is characterized in that may further comprise the steps:
(1), in network topology, two network interface cards of every machine is connected on respectively on two switches;
(2), in network topology with two mutual cascades of switch;
(3), utilizing the IP address of work network interface card to send message and accept to switch by the network interface card supervisory programme replys, when a plurality of continuous messages are not replied after certain time interval, then be judged as work network interface card or network equipment failure, system sends alarm signal and writes down alarm status, and the IP address switchover is arrived the backup network interface card;
(4), recover just often former IP address switchover to be returned the work network interface card when the work network interface card.
Aforesaid two card hot backup redundancy method, it is characterized in that in above-mentioned step 3, on each network interface card, dispose fixedly IP and service IP, described fixedly IP is used for the network interface card supervisory programme to send the address that message monitors network card status, described service IP offers the address that system uses when being system's operate as normal, the service IP on two network interface cards can offer system simultaneously and use; Carry out following detection handoff procedure:
(1) judges that by the network interface card supervisory programme service IP is whether on the work network interface card;
(2) if service IP is operated on the work network interface card, then do not switch, supervision circulates; Undesired when this work network interface card or network equipment work, when a plurality of continuous messages do not obtain replying, check the operating state of backup network interface card after certain time interval; If the backup network interface card is working properly, then service IP is switched on the backup network interface card and move.
Aforesaid double-network card hot backup redundancy method is characterized in that in above-mentioned step 4, and service IP is operated on the backup network interface card, and the state of the continuous judgment task network interface card of network interface card supervisory programme if the work network interface card is normal, is judged the backup network interface card again; If the backup network interface card is also normal, wait for that then the work network interface card keeps normal condition and after a period of time service IP switched to the work network interface card; If the backup network interface card is undesired, then immediately service IP is switched to the work network interface card.
Aforesaid two card hot backup redundancy method, it is characterized in that described service IP and fixedly IP not on the same network segment.
Advantage of the present invention: 1, network failure monitoring and the switching of fault network interface card are all finished by automated procedures, do not need manual intervention; 2, be applicable to various UNIX operating systems and LINUX operating system, versatility is good; 3, all functions are to realize in application layer fully, not the software that need carry by any operating system; 4, switch speed is fast behind the network failure, can reach in second level; 5, parameter programming such as fault detect cycle, connection interval switching time is adjustable; 6, fixedly IP and service IP be not at the consolidated network address field, and the fixing general business that IP can participation system can be with the service IP conflict of other machines; 7, on two network interface cards service IP is arranged all, the system that can offer simultaneously uses; 8, can guarantee no matter be network interface card fault, the netting twine fault of main frame, or an exchange fault, whole system still can proper communication, has solved the cross faults problem of traditional double network technology well.
Description of drawings
Fig. 1 is a network interface card fault detect process chart;
Fig. 2 is two net hot backup redundancy method network topological diagrams;
Fig. 3 is traditional double network technology " cross faults " and " Single Point of Faliure " schematic diagram;
Fig. 4 is a service IP hand-off process flow chart.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed introduction.
The double-network card hot backup redundancy method that the present invention relates to is to use the software of the independent development that is operated in application layer to realize, does not rely on concrete operating system and switch, is applicable to various UNIX and (SuSE) Linux OS.Two card hot backup redundancy method of the present invention has guaranteed portability, can operate in safely and steadly on the operating system platforms such as IBM AIX, Sun Solaris, Alpha Tru64, HPUX, Linux; System programming language adopts ANSI C/C++, and meets IEEE POSIX.2 standard.
In the present invention, two network interface cards with every machine in network topology are connected on respectively on two switches, in network topology with two mutual cascades of switch.What the present invention at first realized is the network interface card fault detection capability, detect main frame and the connectedness between the network equipment that networks (as switch).The function that possesses has: whether (1) network interface card and auxiliary device thereof (as netting twine etc.) supervision of operate as normal; (2) state such as (as netting twine) does not normally then have any action if network interface card and auxiliary device thereof, when network interface card and auxiliary device thereof (as netting twine etc.) write down this malfunction when breaking down, and sends alarm signal, notifies the responsible person to repair the network interface card fault.
The network interface card fault detect is to use the network interface card supervisory programme adopt to send icmp packet and receives replys realization.In system, set up configuration file, disposed and the network address of network equipment of every network interface card.The automated procedures that system programming language is realized read the information of configuration file with the form operation of finger daemon, by the continual connected state that sends icmp packet monitoring network interface card to the network appliance address that every network interface card connected.Do not replied after at certain time intervals when a plurality of continuous icmp packets, will be judged as network equipment failure.Handling process as shown in Figure 1.
The second portion function that the present invention realizes is the hot backup redundancy mechanism of two network interface cards.Two net hot backup redundancy mechanism network topologies as shown in Figure 2.Compare and traditional two net mechanism, two switches are cascaded among Fig. 2.By the cascade of switch, can solve " cross faults " (Fig. 3 (a)) and " Single Point of Faliure " (Fig. 3 (b)) problem that the traditional double network technology brings.In Fig. 3 (a), when main frame 1 network interface card, 1/ netting twine and main frame 2 network interface cards 2/ netting twine broke down, main frame 1 just can not be communicated by letter with main frame 2; Equally, in Fig. 3 (b), when main frame 1 network interface card 1/ netting twine broke down, main frame 1 can not be communicated by letter with main frame 2.And the present invention can address this problem well.
The hot backup redundancy mechanism of two network interface cards is by fixedly IP and Floating IP address of configuration on network interface card, also write above two kinds of addresses simultaneously in configuration file, and moves network interface card supervisory programme and the realization of network interface card changeover program simultaneously.Floating IP address claims service IP again, the IP that communication is used when being system's operate as normal.Fixedly IP and service IP at first are configured on the network interface card of an appointment (the work network interface card that is called this service IP), and the network interface card supervisory programme uses fixing IP to send the state of icmp packet supervision network interface card, and service IP then offers system and normally uses.And service IP and fixedly IP is not on the same network segment, so fixedly IP can not take the number of service IP, and can guarantee that fixedly IP can not used by system's general business.
When breaking down, the network interface card changeover program is responsible for service IP is switched on another network interface card that is operated in normal condition (the backup network interface card that calls this service IP) when the work network interface card of service IP and auxiliary device (as netting twine etc.) thereof, but fixedly IP is motionless.After work network interface card in service IP recovered normal a period of time (as 3 seconds), the network interface card changeover program was responsible for the service IP switching is got back on its work network interface card.Handling process as shown in Figure 4.
Contrast accompanying drawing 4 at first judges that by the network interface card supervisory programme service IP is whether on the network interface card of working.
If service IP is operated on the work network interface card, when this network interface card work is undesired, check the operating state of backup network interface card.If backup network interface card then network interface card working properly changeover program switches to the operation of backup network interface card with service IP.
If service IP has been operated on the backup network interface card, the working net of promptly associating snaps into the switching of backup network interface card.Then the network interface card supervisory programme is judged the work network card status of this service IP.If the work network interface card is normally judged the backup network card status again.If the backup network interface card is also normal, then wait for the work network interface card keep normal condition after a period of time the network interface card changeover program again handed over service IP to the work network interface card.If the backup network interface card also undesired then immediately handed over service IP to the work network interface card.
Working example
Contrast accompanying drawing 2, the network interface card 1 of main frame 1 is provided with Floating IP address: 192.168.0.1 is provided with fixedly IP:192.168.6.1.The network interface card 2 of main frame 1 is provided with Floating IP address: 192.168.1.1 is provided with fixedly IP:192.168.7.1.
The network interface card 1 of main frame 2 is provided with Floating IP address: 192.168.0.2 is provided with fixedly IP:192.168.6.2.The network interface card 2 of main frame 2 is provided with Floating IP address: 192.168.1.2 is provided with fixedly IP:192.168.7.2.
The address setting of switch 1 is 192.168.6.254.
The address setting of switch 2 is 192.168.7.254.
The network interface card supervisory programme uses the fixedly IP:192.168.6.1 of network interface card 1 to send icmp packet to the address of switch 1 192.168.6.254.Think that then network state is normal if can meet with a response within a certain period of time.Do not think then that as if receiving to reply at interval above certain hour network state is undesired, the network interface card changeover program switches to the Floating IP address of network interface card 1: 192.168.0.1 on the network interface card 2.At this moment network interface card 2 has three ip addresses:
192.168.0.2
192.168.1.2
192.168.0.1
The network failure of this moment in two kinds of situation.Situation one is network interface card 1 fault or the netting twine fault of main frame 1.Have only network interface card 1 service IP of main frame 1 to be switched on the network interface card 2 in this case.Other machines still can be communicated by letter with network interface card 1 service IP on network interface card 2 by switch 1.Whole system network service is normal.Situation two is that switch 1 breaks down.Network interface card 1 address of service of All hosts all is switched on the network interface card 2 in this case.Whole system uses switch 2 to communicate, and whole system network service is normal.
Floating IP address when the network interface card 1 of main frame 1: after 192.168.0.1 was switched to network interface card 2, the network interface card supervisory programme still continued to use the fixedly IP:192.168.6.1 of network interface card 1 to send icmp packet to the address of switch 1 192.168.6.254.If replied once more, and continuously a period of time replied, think that then network interface card 1 recovers normal.This moment, the changeover program of network interface card 1 switched back network interface card 1 with the floating address of network interface card 1 from network interface card 2.Whole system network service is still normal.
The foregoing description does not limit the present invention in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in protection scope of the present invention.
Claims (4)
1, a kind of double-network card hot backup redundancy method is characterized in that may further comprise the steps:
(1), in network topology, two network interface cards of every machine is connected on respectively on two switches;
(2), in network topology with two mutual cascades of switch;
(3), utilizing the IP address of work network interface card to send message and accept to switch by the network interface card supervisory programme replys, when a plurality of continuous messages are not replied after certain time interval, then be judged as work network interface card or network equipment failure, system sends alarm signal and writes down alarm status, and the IP address switchover is arrived the backup network interface card;
(4), recover just often former IP address switchover to be returned the work network interface card when the work network interface card.
2, two card hot backup redundancy method according to claim 1, it is characterized in that in above-mentioned step 3, on each network interface card, dispose fixedly IP and service IP, described fixedly IP is used for the network interface card supervisory programme to send the address that message monitors network card status, described service IP offers the address that system uses when being system's operate as normal, the service IP on two network interface cards can offer system simultaneously and use; Carry out following detection handoff procedure:
(1) judges that by the network interface card supervisory programme service IP is whether on the work network interface card;
(2) if service IP is operated on the work network interface card, then do not switch, supervision circulates; Undesired when this work network interface card or network equipment work, when a plurality of continuous messages do not obtain replying, check the operating state of backup network interface card after certain time interval; If the backup network interface card is working properly, then service IP is switched on the backup network interface card and move.
3, double-network card hot backup redundancy method according to claim 2 is characterized in that in above-mentioned step 4, and service IP is operated on the backup network interface card, and the state of the continuous judgment task network interface card of network interface card supervisory programme if the work network interface card is normal, is judged the backup network interface card again; If the backup network interface card is also normal, wait for that then the work network interface card keeps normal condition and after a period of time service IP switched to the work network interface card; If the backup network interface card is undesired, then immediately service IP is switched to the work network interface card.
4, according to claim 2 or 3 described two card hot backup redundancy methods, it is characterized in that described service IP and fixedly IP not on the same network segment.
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| CNA2008102351948A CN101404568A (en) | 2008-11-17 | 2008-11-17 | Double-network card hot backup redundancy method |
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| CNA2008102351948A CN101404568A (en) | 2008-11-17 | 2008-11-17 | Double-network card hot backup redundancy method |
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| CN101944987A (en) * | 2010-05-27 | 2011-01-12 | 迈普通信技术股份有限公司 | Method for setting and switching dial-on-demand lines of master and slave backups, and system and equipment |
| CN101980468A (en) * | 2010-12-06 | 2011-02-23 | 南京恩瑞特实业有限公司 | Network hot backup data transmission method |
| WO2011072536A1 (en) * | 2009-12-17 | 2011-06-23 | 研祥智能科技股份有限公司 | Dual redundant device and system of multiple netword cards under vxworks system |
| CN102281158A (en) * | 2011-08-23 | 2011-12-14 | 大唐移动通信设备有限公司 | Line fault processing method and device |
| CN102799153A (en) * | 2012-07-13 | 2012-11-28 | 西南交通大学 | Wired and wireless hot-standby redundancy multi-master communication method and field network node module |
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| CN103036780A (en) * | 2012-12-14 | 2013-04-10 | 滁州安瑞电力自动化有限公司 | Intelligent hot standby redundant double network cards and hot standby redundant method |
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| CN101980468A (en) * | 2010-12-06 | 2011-02-23 | 南京恩瑞特实业有限公司 | Network hot backup data transmission method |
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| CN115529222A (en) * | 2022-09-14 | 2022-12-27 | 天津津航计算技术研究所 | Dual-redundancy network card switching device based on cascade switch |
| CN115529223A (en) * | 2022-09-14 | 2022-12-27 | 天津津航计算技术研究所 | Dual-redundancy network card switching method based on cascade switch |
| CN115866106A (en) * | 2023-02-21 | 2023-03-28 | 麒麟软件有限公司 | Data processing method for multi-network card bound redundant network communication system |
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