CN1929324A

CN1929324A - Master-salve switching method and system for mutual backup device

Info

Publication number: CN1929324A
Application number: CN 200610140946
Authority: CN
Inventors: 王飓
Original assignee: Hangzhou Huawei 3Com Technology Co Ltd
Current assignee: New H3C Technologies Co Ltd
Priority date: 2006-10-17
Filing date: 2006-10-17
Publication date: 2007-03-14
Anticipated expiration: 2026-10-17
Also published as: CN100514878C

Abstract

This invention discloses one main switch method of backup device, which comprises the following steps: the device has same virtual IP address to deny ARP requirements to above virtual IP address; when selecting main device, addressing its self MAC address and virtual IP address relationship free ARP message to trigger NFC brushing ARP record. This invention discloses other backup device main switch method and one main switch system.

Description

A kind of master-slave switching method of the device that backups each other and principal and subordinate's switched system

Technical field

The present invention relates to data communication field, relate in particular to a kind of master-slave switching method of the device that backups each other.

Background technology

Current network world no longer only is the data forwarding ability that traditional router and switch provide to the requirement of the network equipment, more requires the network equipment to support various application.Such as, require equipment can do data forwarding, can insert voice again; Can finish load balancing, can carry out content safety again and filter.Because any family independently technology manufacturer is difficult to provide simultaneously the client desired all services, the user need buy the equipment of a plurality of manufacturers, and the networking and the function of oneself carrying out these equipment cooperate.So often the matching problem because of equipment room causes operating efficiency low, the every function that can not use every kind of equipment neatly and provided.Simultaneously, a lot of equipment are deposited in the machine room, give to administer and maintain and have caused no small burden.

In order to address the above problem, the applicant has proposed a kind of OAA framework, the equipment of different vendor is integrated into the system of a loose coupling, as shown in Figure 1.A system that meets the OAA framework comprises forwarded parts NFC and the separate traffic parts IAC that connects by interface link ILC, wherein NFC is the main body of OAA system, being responsible for carrying out message and transmitting, the function of complete router and switch is arranged, also is the core of user management control; IAC is the business service main body that is used to provide the additional function of various application, generally shows as a veneer or button card in the OAA system; ILC is integrated in respectively on NFC and the IAC as interface usually, transmits and the path of control information transmission for NFC and IAC provide message.

At different application, the applicant has defined main frame, mirror image, has been redirected and has penetrated 4 kinds of mode of operations, can finish communicating by letter between NFC and the IAC by one of these 4 kinds of patterns or wherein several combinations.A kind of pattern that is most widely used before main frame (Host) type order wherein.

Under this pattern, IAC has the IP address of oneself just as a main frame on the network, exists as the network tip.The IP message all is that the Ethernet interface of logical ILC is transmitted, and logically is called and transmits passage (Forwar ding-Channel).This mode, the coupling between NFC and the IAC is the most loose, and NFC only finishes simple message and transmits, and IAC then as the promoter and the recipient of data message, receives and dispatches various messages, and NFC is exactly the gateway of IAC.Under host mode, important IAC need carry out master and slave backup, and principal and subordinate's switching of how carrying out IAC then is the key issue that needs solution.

Summary of the invention

The problem to be solved in the present invention provides master-slave switching method and the principal and subordinate's switched system of the IAC that backups each other in a kind of open application architecture OAA system, the feasible IAC that works under the host mode can be well on and carry out principal and subordinate's switching, is that its message that provides is transmitted and do not influence NFC.

For solving the problems of the technologies described above, the objective of the invention is to be achieved through the following technical solutions: a kind of master-slave switching method of the device that backups each other, described device is the separate traffic parts IAC that works among the open application architecture OAA of host mode, described mutually redundant at least two IAC have identical virtual ip address, from the ARP request of IAC refusal response to above-mentioned virtual ip address; When IAC newly is elected as main IAC, issue the gratuitous ARP packet of himself MAC Address and described virtual ip address corresponding relation, described gratuitous ARP packet is used for trigger NFC and refreshes the ARP record.

Preferably, described mutually redundant at least two IAC also have identical virtual mac address, when IAC newly is elected as main IAC, issue the gratuitous ARP packet of himself virtual mac address and virtual ip address corresponding relation, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes virtual mac address and interface.

Preferably, described mutually redundant at least two IAC have different real MAC address, when IAC newly is elected as main IAC, issue the gratuitous ARP packet of himself real MAC address and virtual ip address corresponding relation, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes virtual ip address and real MAC address.

Preferably, described method also comprises: when main IAC broke down, another one is mutually redundant with it newly was elected as main IAC from IAC.

Preferably, described method also comprises: new main IAC receives the service traffics from the described virtual ip address of new arrival of NFC.

Preferably, described method also comprises: mutually redundant IAC carries out principal and subordinate role's election according to mutual essential information message.

A kind of principal and subordinate's switched system, comprise mutually redundant at least two the separate traffic parts IAC that work in host mode among the OAA, the described IAC of backuping each other has identical virtual ip address, each IAC comprises the ARP requesting processing, in order at described IAC by the gratuitous ARP packet of when IAC newly is elected as main IAC, issuing himself MAC Address and described virtual ip address corresponding relation, described gratuitous ARP packet is used for trigger NFC and refreshes the ARP record; When described IAC as from IAC the time, its ARP requesting processing refusal response is to the ARP request of above-mentioned virtual ip address.

Preferably, the described IAC of backuping each other also has identical virtual mac address, above-mentioned ARP requesting processing IAC under it is comprised by the gratuitous ARP packet of issuing when IAC newly is elected as main IAC: the corresponding relation of self virtual mac address and virtual ip address, described gratuitous ARP packet is used to trigger the corresponding relation that NEC refreshes virtual mac address and interface.

Preferably, the described IAC of backuping each other has different real MAC address, above-mentioned ARP requesting processing IAC under it is comprised by the gratuitous ARP packet of issuing when IAC newly is elected as main IAC: the corresponding relation of self real MAC address and virtual ip address, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes virtual ip address and real MAC address.

Preferably, each IAC also comprises principal and subordinate's control unit, in order to carry out principal and subordinate role's election according to mutual essential information message.

A kind of master-slave switching method of the device that backups each other, described device is the separate traffic parts IAC that works among the open application architecture OAA of host mode, described mutually redundant at least two IAC have identical professional virtual ip address group, described professional virtual ip address group comprises at least two professional virtual ip address that are associated with the different business group

The described IAC of backuping each other carries out load balancing based on different service groups, and each IAC is to its ARP request refusal response from the relevant professional virtual ip address of control service groups;

IAC by when control switches to master control, issues the professional virtual ip address of described service groups association and the gratuitous ARP packet of himself MAC Address corresponding relation with the control of its service groups, and described gratuitous ARP packet is used for trigger NFC and refreshes the ARP record.

Preferably, described mutually redundant at least two IAC also have identical professional virtual mac address group, described professional virtual mac address group comprises at least two professional virtual mac address that are associated with the different business group, IAC with the control of its service groups by when control switches to master control, issue the professional virtual ip address of described service groups association and the gratuitous ARP packet of professional virtual mac address corresponding relation, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes professional virtual mac address and interface.

Preferably, state mutually redundant at least two IAC and have different real MAC address, IAC with the control of its service groups by when control switches to master control, issue the professional virtual ip address of described service groups association and the gratuitous ARP packet of himself real MAC address corresponding relation, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes professional virtual ip address and real MAC address.

Preferably, described method also comprises: when an IAC breaks down, the IAC that takes over job with the control of its corresponding service groups by switching to master control from control.

Preferably, described method also comprises: newly grasp the flow of the IAC reception of service groups ownership from the professional virtual ip address of the described service groups association of the arrival of NFC.

A kind of principal and subordinate's switched system, comprise mutually redundant at least two the separate traffic parts IAC that work in host mode among the OAA, the described IAC of backuping each other has identical professional virtual ip address group, described professional virtual ip address group comprises at least two professional virtual ip address that are associated with the different business group, and the IAC that backups each other carries out load balancing based on different service groups;

Each IAC comprises the ARP requesting processing, in order at described IAC with the control of its service groups by when control switches to master control, issue the professional virtual ip address of described service groups association and the gratuitous ARP packet of himself MAC Address corresponding relation, described gratuitous ARP packet is used for trigger NFC and refreshes the ARP record;

The ARP requesting processing refusal response of described IAC is to the ARP request of this IAC from the relevant professional virtual ip address of control service groups.

Preferably, the described IAC of backuping each other also has identical professional virtual mac address group, and described professional virtual mac address group comprises at least two professional virtual mac address that are associated with the different business group,

Described IAC with the control of its service groups by when control switches to master control, the gratuitous ARP packet of its ARP requesting processing issue comprises: the professional virtual ip address of described service groups association and the corresponding relation of professional virtual mac address, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes professional virtual mac address and interface.

Preferably, the described IAC of backuping each other has different real MAC address, described IAC with the control of its service groups by when control switches to master control, the gratuitous ARP packet of its ARP requesting processing issue comprises: the gratuitous ARP packet of the professional virtual ip address of described service groups association and himself real MAC address corresponding relation, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes professional virtual ip address and real MAC address.

Preferably, each IAC also comprises principal and subordinate's control unit, switches in order to principal and subordinate's control of carrying out each service groups according to mutual essential information message.

Above technical scheme in a kind of technical scheme of the present invention, by for mutually redundant at least two IAC identical virtual ip address being set, making a plurality of IAC all can handle identical services and has possessed possibility as can be seen.In addition, from the ARP request of IAC refusal response NFC,, guaranteed that the same time has only a main IAC job only by main IAC response to virtual ip address.When IAC newly is elected as main IAC, issue the gratuitous ARP packet of himself MAC Address and virtual ip address corresponding relation, trigger NFC refreshes existing ARP record.And then NFC just can send to the service traffics that newly arrive described virtual ip address described new main IAC according to the ARP record after refreshing, and the principal and subordinate who has promptly finished IAC is switched, and makes new main IAC be taken over the work of former main IAC smoothly.This shows that the master-slave switching method of this IAC that backups each other provided by the invention has guaranteed the smooth switching when IAC works in host mode.Another technical scheme of the present invention, the feasible IAC that backups each other still can carry out master and slave switching smoothly under the situation with load balancing function.

Description of drawings

The OAA configuration diagram that Fig. 1 provides for the applicant;

Fig. 2 is the master-slave switching method first embodiment flow chart of the IAC that backups each other in the OAA framework;

Fig. 3 is the concrete configuration diagram of the OAA of specific embodiment of the invention correspondence;

Fig. 4 is the master-slave switching method second embodiment flow chart of the IAC that backups each other in the OAA framework;

Fig. 5 is master-slave switching method the 3rd embodiment flow chart of the IAC that backups each other in the OAA framework;

Fig. 6 is master-slave switching method the 4th embodiment flow chart of the IAC that backups each other in the OAA framework;

Fig. 7 is the structural representation of principal and subordinate's switched system embodiment of the present invention.

Embodiment

See also Fig. 2, it is the master-slave switching method first embodiment flow chart of mutually redundant separate traffic parts IAC among a kind of open application architecture OAA disclosed by the invention.In order to make narration more concrete, backing up mutually with two IAC is that example describes, and please in conjunction with Fig. 3, it is the concrete configuration diagram of OAA of specific embodiment of the invention correspondence.In exemplary OAA Organization Chart shown in Figure 3, comprise ILC24, the 2nd IAC22 between an IAC21, the 2nd IAC22, NFC23 and an IAC21 and the NFC23 and the ILC25 between the NFC23.

The essence of ILC is the two-part interface connector of IAC and NFC, links together by the equipment of these parts with different vendor.ILC does not generally show as outside visible parts, but is integrated in respectively on NFC and the IAC as interface.Because the present invention relates generally to the interface that is integrated in NFC, therefore particularly point out, the interface that ILC24 is integrated on the NFC is first interface 241, the interface that ILC25 is integrated on the NFC23 is second interface 251.

Step 210: for a mutually redundant IAC21 and the 2nd IAC22 are provided with a common virtual ip address 10.1.1.3, even the IAC21 that wins has identical virtual ip address with the 2nd IAC22.And all relate to the professional relevant configuration of an IAC21 and the 2nd IAC22 and all use this professional virtual ip address of 10.1.1.3.In addition, the real MAC address of an IAC21 is 00.00.00.00.00.01, and the real MAC address of the 2nd IAC22 is 00.00.00.00.00.02.

Step 220:, only respond by main IAC from ARP (address resolution protocol) request of IAC refusal response NFC23 to virtual ip address (10.1.1.3).Do not handle any message relevant from IAC with this virtual ip address.One skilled in the art will appreciate that in any backup scenario to have only an equipment to be in the master at one time and use state, all the other equipment that back up with it are in from state.The present invention also makes an exception, and has only one to be main IAC among an IAC21 and the 2nd IAC22, and another one is from IAC, suppose an IAC21 current be main IAC, the 2nd IAC22 is current to be from IAC.

If NFC23 is that to receive purpose IP address first be the message of 10.1.1.3, owing to do not learn relevant ARP (address resolution protocol) content before this, so the ARP request that to broadcast an IP address be 10.1.1.3.The one IAC21 and the 2nd IAC22 can receive this ARP request, and both virtual ip address all are 10.1.1.3, but because an IAC21 is current main IAC, therefore have only an IAC21 to reply arp response, in this arp response message, inform the real MAC address 00.00.00.00.00.01 of NFC23 oneself to NFC23.Common the 2nd IAC22 directly abandons this ARP request message.

The arp response that NFC23 replys according to an IAC21 obtains the corresponding relation between virtual ip address 10.1.1.3 and the real MAC address 00.00.00.00.00.01.Meanwhile, because the arp response message that an IAC21 replys enters NFC23 by first interface 241, so NFC23 can also obtain the corresponding relation of the real MAC address 00.00.00.00.00.01 and first interface 241.NFC23 can give record by list item, usually as ARP list item and MAC address entries after obtaining above-mentioned routing iinformation.And then NFC23 just can be that the message of 10.1.1.3 is transmitted to the IAC21 that real MAC address is 00.00.00.00.00.01 by first interface 241 with purpose IP.

After this, switch if the principal and subordinate is not taken place between an IAC21 and the 2nd IAC22, the service traffics that NFC23 can will arrive virtual ip address 10.1.1.3 according to the routing iinformation of record always send on the IAC21 as main IAC.

Step 230: when an IAC21 breaks down or other reasons causes the principal and subordinate to be switched, the 2nd IAC22 newly is elected as main IAC, and an IAC21 newly is elected as from IAC.

Generally speaking, have only the main IAC Shi Caihui that breaks down the principal and subordinate is taken place to switch.With regard to present embodiment, an IAC21 can periodically issue the essential information message when operate as normal, and described essential information message is in order to showing from IAC (the 2nd IAC22) whether oneself survives.If the 2nd IAC22 periodically receives the essential information message from an IAC21, just know an IAC21 operate as normal, keep oneself from state.If the 2nd IAC22 does not receive the essential information message from an IAC21 in preset time, judge that then an IAC21 may break down, newly be elected as main IAC at once.

When an IAC21 and the 2nd IAC22 have just started, can by the user directly be provided with which be main which be from, also can carry out principal and subordinate's competition according to the information such as priority of each IAC.For example, the one IAC21 and the 2nd IAC22 look oneself for from IAC during startup, monitor the current IAC (whether receiving the essential information message of autonomous IAC to decide on it) whether the major state of being operated in is arranged.If the essential information message from IAC does not receive autonomous IAC in a period of time just newly be elected as main IAC, and issue comprises the essential information message of own priority.Every receive from the other side's essential information message from IAC, the priority of the other side's priority and oneself is compared, if own priority is higher than the other side, then oneself newly is elected as main IAC, the other side newly is elected as from IAC; If own priority is lower than the other side, then keep oneself from state.If priority is identical, what then the IP address was little is main.Just main IAC can be selected in the IAC that backups each other thus and from IAC.Above-mentionedly carry out principal and subordinate's election process according to the precedence information in the essential information message, not only can occur in firm the startup stage, also can occur in the course of normal operation, in such cases, even current main IAC does not break down, and state informations such as master and slave IAC priority change, and the principal and subordinate also might be taken place switch.

In addition, need explanation, more than a plurality of IAC of backuping each other process of carrying out principal and subordinate election multiple mode is arranged, for example each IAC also can be used as main IAC and starts, election is according to also being not limited to information such as priority and IP address, and these can be provided with according to actual conditions by user oneself.

Step 240: when the 2nd IAC22 newly is elected as main IAC, initiatively send the gratuitous ARP packet of virtual ip address 10.1.1.3, announce that in this gratuitous ARP packet the MAC Address of virtual ip address 10.1.1.3 correspondence is the real MAC address 00.00.00.00.00.02 of himself.The gratuitous ARP packet of this virtual ip address 10.1.1.3 is used for the corresponding relation that trigger NFC 23 refreshes virtual ip address 10.1.1.3 and real MAC address.

Aforementioned carrying, when an IAC21 was main IAC, in the ARP list item that NFC23 learns, the MAC Address of IP address 10.1.1.3 correspondence was the real MAC address 00.00.00.00.00.01 of an IAC21.After this, if NFC23 receives the gratuitous ARP packet that the 2nd IAC22 initiatively issues, will refresh original routing iinformation according to this message.Particularly, the MAC Address corresponding with IP address 10.1.1.3 that the gratuitous ARP packet of the 2nd IAC21 issue is announced is the real MAC address 00.00.00.00.00.02 of the 2nd IAC21, and the record MAC Address corresponding with IP address 10.1.1.3 is 00.00.00.00.00.01 in the original ARP list item of NFC23, so NFC23 refreshes in view of the above.The MAC Address of IP address 10.1.1.3 correspondence in the ARP list item of record is refreshed for 00.00.00.00.00.02 (i.e. the real MAC address of the 2nd IAC22).

In addition, because the gratuitous ARP packet that the 2nd IAC 22 sends enters NFC23 by second interface 251, therefore NFC23 can also obtain the corresponding relation of the real MAC address 00.00.00.00.00.02 and second interface 251, generally gives record by the MAC Address list item.After this, if the flow of new this IP address of arrival 10.1.1.3 is arranged, will be sent to the 2nd IAC22 that real MAC address is 00.00.00.00.00.02 by second interface 251 by NFC.

This shows, the 2nd IAC 22 that newly is elected as main IAC is by the issue gratuitous ARP packet, make NFC the flow of new this IP address of arrival 10.1.1.3 can be sent to new main IAC (the 2nd IAC22), rather than former main IAC (IAC21), successfully realized the switching of principal and subordinate IAC.

See also Fig. 4, it is the master-slave switching method second embodiment flow chart of mutually redundant separate traffic parts IAC among a kind of open application architecture OAA disclosed by the invention.Still specifically illustrate in conjunction with the concrete configuration diagram of OAA shown in Figure 3.The difference part of the present embodiment and first embodiment is that mutually redundant a plurality of IAC are provided with identical virtual mac address, and then causes the gratuitous ARP packet of new main IAC issue and ARP record that NFC refreshes all different.For present embodiment step or the notion identical with first embodiment, just repeat no more, detailed content is please described referring to first embodiment.

Step 410: for a mutually redundant IAC21 and the 2nd IAC22 are provided with a common virtual ip address 10.1.1.3, and a common virtual mac address 00.00.00.00.00.03.

Step 420:, only responded by main IAC from the ARP request of IAC refusal response NFC23 to virtual ip address (10.1.1.3).Do not handle any message relevant from IAC with this virtual ip address.

If NFC23 is that to receive purpose IP address first be the message of 10.1.1.3,, therefore broadcast the ARP request message that the IP address is 10.1.1.3 owing to do not learn relevant ARP (address resolution protocol) content before this.The one IAC21 and the 2nd IAC22 can receive this ARP request, and both virtual ip address all are 10.1.1.3, but because an IAC21 is current main IAC, therefore have only an IAC21 to reply arp response, in this arp response message, inform the virtual mac address 00.00.00.00.00.03 of NFC23 oneself to NFC23.Common the 2nd IAC22 directly abandons this ARP request message.

The arp response that NFC23 replys according to an IAC21 obtains the corresponding relation between virtual ip address 10.1.1.3 and the virtual mac address 00.00.00.00.00.03.Meanwhile, because the arp response message that an IAC21 replys enters NFC23 by first interface 241, so NFC23 can also obtain the corresponding relation of the virtual mac address 00.00.00.00.00.03 and first interface 241.NFC23 can give record by list item, usually as ARP list item and MAC address entries after obtaining above-mentioned routing iinformation.And then, NFC23 just can be that the message of 10.1.1.3 is transmitted to the IAC that virtual mac address is 00.00.00.00.00.03 by first interface 241 with purpose IP, because the just IAC 21 that first interface 241 connects, the flow that therefore arrives IP address 10.1.1.3 all can send to an IAC 21.

Step 430: when an IAC21 breaks down or other reasons causes the principal and subordinate to be switched, the 2nd IAC22 newly is elected as main IAC, and an IAC21 newly is elected as from IAC.

Step 440: when the 2nd IAC22 newly is elected as main IAC, initiatively send the gratuitous ARP packet of virtual ip address 10.1.1.3, announce that in this gratuitous ARP packet the MAC Address of virtual ip address 10.1.1.3 correspondence is virtual mac address 00.00.00.00.00.03.The trigger NFC 23 that is used for the gratuitous ARP packet of this virtual ip address 10.1.1.3 refreshes the corresponding relation of virtual MAC 00.00.00.00.00.03 address and interface.

Aforementioned carrying in step 420, when an IAC21 was main IAC, in the ARP list item that NFC23 learns, the MAC Address of IP address 10.1.1.3 correspondence was an IAC21 and the total virtual mac address 00.00.00.00.00.03 of the 2nd IAC22.After this, if NFC23 receives the gratuitous ARP packet that the 2nd IAC22 initiatively issues, will refresh original routing iinformation according to this message.Particularly, the MAC Address corresponding with IP address 10.1.1.3 that the gratuitous ARP packet of the 2nd IAC21 issue is announced is to remain described virtual mac address 00.00.00.00.00.03, therefore the IP address 10.1.1.3 of NFC record and the corresponding relation between the MAC Address 00.00.00.00.00.03 do not change, and need not to refresh.But,, be second interface 251 so NFC23 this time obtains the interface of virtual mac address 00.00.00.00.00.03 correspondence because the gratuitous ARP packet that the 2nd IAC 22 sends enters NFC23 by second interface 251; And the interface of the virtual mac address 00.00.00.00.00.03 correspondence of NFC record is first interface 241 before this.So NFC just needs refresh MAC Address and the interface corresponding relation that has write down according to the gratuitous ARP packet that newly receives, change the interface of MAC Address 00.00.00.00.00.03 correspondence into second interface 251 by first interface 241.

After this, if the flow of new this IP address of arrival 10.1.1.3 is arranged, will be sent to the IAC that virtual mac address is 00.00.00.00.00.02 by second interface 251 by NFC, because just the 2nd IAC 22 that second interface 251 connects, the flow that therefore arrives IP address 10.1.1.3 all can send to the 2nd IAC 22.

By the above-mentioned course of work as can be seen, in a second embodiment, because sending to the arp response message content of NFC, the more former main IAC of gratuitous ARP packet self content of new main IAC issue do not change, it promptly all is the corresponding relation between the virtual ip address that has and the total virtual mac address, therefore, even learning this gratuitous ARP, other network equipments outside the NFC can not be affected yet.

Though it will be appreciated by those skilled in the art that above first embodiment and second embodiment all is with specifying that two IAC that backup each other carry out, and in actual applications, also the plural IAC of backuping each other can be set as the case may be.If back up mutually more than two IAC, if so main IAC fault, all the other are a plurality of both can specify a new main IAC of conduct by the user from IAC, also can be at war with according to information such as own priority, at current a plurality of main IAC that select from IAC, and then main IAC subsequent operation that should be newly elected is identical with previous embodiment.

See also Fig. 5, it is master-slave switching method the 3rd embodiment flow chart of mutually redundant separate traffic parts IAC among a kind of open application architecture OAA disclosed by the invention.Still specifically illustrate in conjunction with exemplary OAA configuration diagram shown in Figure 3.The difference part of the present embodiment and first embodiment is, not only has a backup functionality between a plurality of IAC in the present embodiment, also has the load balancing function based on the different business group.For present embodiment step or the notion identical with first embodiment, repeat no more, detailed content is please described referring to first embodiment.

Step 510: for a mutually redundant IAC21 and the 2nd IAC22 are provided with common professional virtual ip address group, described professional virtual ip address group comprises two professional virtual ip address that are associated with the different business group: be associated with the professional virtual ip address 10.1.1.3 of first service groups and be associated with the professional virtual ip address 10.1.1.4 of second service groups.Should recognize that the professional virtual ip address number that comprises in the professional virtual ip address group is relevant with the different business group of division, therefore be not limited to two, present embodiment just provides an example.

Why be called the total professional virtual ip address group of an IAC21 and the 2nd IAC22, be meant that for same service groups an IAC21 has identical virtual ip address with the 2nd IAC22.With regard to first service groups, an IAC21 has identical virtual ip address 10.1.1.3 with the 2nd IAC22; With regard to second service groups, an IAC21 has identical virtual ip address 10.1.1.4 with the 2nd IAC22.In addition, the professional relevant configuration that relates to same service groups is all used the professional virtual ip address of this service groups association.Particularly, the professional relevant configuration of all relevant first service groups is all used professional virtual ip address 10.1.1.3; The professional relevant configuration of all relevant second service groups is all used professional virtual ip address 10.1.1.4.

In addition, the real MAC address of an IAC21 is 00.00.00.00.00.01, and the real MAC address of the 2nd IAC22 is 00.00.00.00.00.02.

Step 520: an IAC21 carries out load balancing with the 2nd IAC22 based on different service groups, and each IAC is to its ARP request refusal response from the relevant professional virtual ip address of control service groups.

So-called master control is meant that IAC handles the business in the service groups, as receiving from the flow of relevant this service groups of NFC etc.; So-called be meant that from control IAC does not handle the business the service groups, as not receiving from the flow of relevant this service groups of NFC etc., but carry out master control under certain condition for changing into from the service groups of controlling.To which service groups from control, which service groups master control can be disposed voluntarily by the user at first for IAC, also can allow a plurality of mutually redundant IAC be at war with according to the control priority of each service groups separately.In a word, finally can reach a plurality of IAC of backuping each other and carry out load balancing based on the different business group, comparatively reasonable use resource backup.

Supposing that an IAC21 is master control for the control of first service groups, is from control for the control of second service groups; The 2nd IAC22 is from control for the control of first service groups, is master control for the control of second service groups.Under an IAC21 and the 2nd IAC22 can the situations of operate as normal, each IAC was to its ARP request refusal response from the relevant professional virtual ip address of control service groups.Particularly, an IAC21 is only responded the ARP request of the professional virtual ip address 10.1.1.3 of the first service groups association, and the ARP request to the professional virtual ip address 10.1.1.4 of the second service groups association does not respond; The 2nd IAC22 is only responded the ARP request of the professional virtual ip address 10.1.1.4 of the second service groups association, and the ARP request to the professional virtual ip address 10.1.1.3 of the first service groups association does not respond.

If it is the message of 10.1.1.3 that NFC23 receives purpose IP address first, owing to do not learn relevant ARP (address resolution protocol) content before this, broadcasting IP address is the ARP request of 10.1.1.3.The one IAC21 and the 2nd IAC22 can receive this ARP request, and both virtual ip address all have 10.1.1.3.The one IAC21 finds that the service groups of this professional virtual ip address association of 10.1.1.3 is first service groups, the own at present control to first service groups is master control, thereby responding this ARP request, the IP address of informing NFC23 oneself is that 10.1.1.3, MAC Address are 00.00.00.00.00.01.The 2nd IAC22 finds that the service groups of this professional virtual ip address association of 10.1.1.3 is first service groups, and the own at present control to first service groups is from control, therefore abandons this message and is not responded.

In like manner, be the message of 10.1.1.4 if NFC23 receives purpose IP address first, when it sends the ARP request of this IP address, have only the 2nd IAC22 to be responded.And then the arp response that NFC23 replys according to the 2nd IAC21 obtains the corresponding relation between virtual ip address 10.1.1.4 and the real MAC address 00.00.00.00.00.02.Meanwhile, because the arp response message that the 2nd IAC21 replys enters NFC23 by second interface 251, so NFC23 can also obtain the corresponding relation of the real MAC address 00.00.00.00.00.02 and second interface 251.After this, NFC23 will be that the message of 10.1.1.4 is transmitted to the 2nd IAC22 that real MAC address is 00.00.00.00.00.02 by second interface 251 with purpose IP.

If between an IAC21 and the 2nd IAC22 not the control with regard to the related service group master and slave switching takes place, then the NFC23 service traffics that can be always will arrive virtual ip address 10.1.1.3 according to the routing iinformation of record send to an IAC21, and the service traffics of arrival virtual ip address 10.1.1.4 are sent to the 2nd IAC22.

IAC21 broke down or other reasons in 530: the one, cause the 2nd IAC22 to the control of first service groups by switching to master control from control.Modal example is that an IAC21 breaks down, and it just can't finish the master control work to first service groups so, must be taken over by the 2nd IAC22, and then the 2nd IAC22 to the control of second service groups by switching to master control from control.In addition and content class described in first embodiment seemingly, also may cause an IAC that the control of related service group is changed based on priority competition.

For example, the IAC that backups each other of operate as normal periodically issues the essential information message, described essential information message comprises the service groups of each self-supporting and to the control priority (can also judge the IP address under the priority same case) of each service groups, and then each IAC is at war with according to the control of the essential information message content that receives to each service groups, last each IAC has the service groups and the service groups from controlling of master control, has reached the load balancing purpose.After this,, just may certain IAC be switched by the control of some service groups if certain IAC to the control priority of some service groups variation has taken place, by switch to master control from control or by master switching to from control.

540: the two IAC22 to the control of first service groups by when control switches to master control, initiatively send the gratuitous ARP packet of virtual ip address 10.1.1.3, announce that in this gratuitous ARP packet the MAC Address of virtual ip address 10.1.1.3 correspondence is the real MAC address 00.00.00.00.00.02 of himself.The gratuitous ARP packet of this virtual ip address 10.1.1.3 is used for the corresponding relation that trigger NFC 23 refreshes virtual ip address 10.1.1.3 and real MAC address.

Aforementioned carrying, when an IAC21 was master control to first service groups, in the ARP list item that NFC23 learns, the MAC Address of IP address 10.1.1.3 correspondence was the real MAC address 00.00.00.00.00.01 of an IAC21.After this, because NFC23 receives the gratuitous ARP packet that the 2nd IAC22 initiatively issues, will refresh original routing iinformation according to this message.Particularly, the MAC Address corresponding with IP address 10.1.1.3 that the gratuitous ARP packet of the 2nd IAC21 issue is announced is the real MAC address 00.00.00.00.00.02 of the 2nd IAC21, and the record MAC Address corresponding with IP address 10.1.1.3 is 00.00.00.00.00.01 in the original ARP list item of NFC23, so NFC23 refreshes in view of the above.The MAC Address of IP address 10.1.1.3 correspondence in the ARP list item of record is refreshed for 00.00.00.00.00.02 (i.e. the real MAC address of the 2nd IAC22) by original 00.00.00.00.00.01 (i.e. the real MAC address of an IAC22).

In addition, because the gratuitous ARP packet that the 2nd IAC 22 sends enters NFC23 by second interface 251, so NFC23 can also obtain the corresponding relation of the real MAC address 00.00.00.00.00.02 and second interface 251.After this, if the flow of new this IP address of arrival 10.1.1.3 is arranged, will be sent to the 2nd IAC22 that real MAC address is 00.00.00.00.00.02 by second interface 251 by NFC.

This shows, new the 2nd IAC22 of the first service groups ownership that grasps is by the issue gratuitous ARP packet, make NFC the flow of new this IP address of arrival 10.1.1.3 can be sent to IAC the 2nd IAC 22 of new grasp ownership, rather than an IAC21 of former grasp ownership, successfully realized the switching of principal and subordinate IAC.

If because the switching that an IAC breaks down and carries out, then an IAC can't work at all; If changing, priority cause an IAC21 and the 2nd IAC22 that the ownership of first service groups is changed, so will be to the ownership of first service groups by when control switches to master control at the 2nd IAC22, the one IAC21 also can with to the ownership of first service groups by master switching to from control, and handle from controlling professional relevant action according to step 520 is described.Then can depend on the circumstances as for the ownership that whether will return first service groups after the IAC21 fault recovery, suppose to have returned after the IAC21 fault recovery ownership of first service groups, method in the time of then also can grasping the first service groups ownership according to aforementioned the 2nd IAC22 is new initiatively sends the gratuitous ARP packet of oneself, again obtain the flow of new this IP address of 10.1.1.3 from NFC, detailed process repeats no more.

See also Fig. 6, it is master-slave switching method the 4th embodiment flow chart of mutually redundant separate traffic parts IAC among a kind of open application architecture OAA disclosed by the invention.Still specifically illustrate in conjunction with exemplary OAA configuration diagram shown in Figure 3.The difference part of present embodiment and the 3rd embodiment is, mutually redundant a plurality of IAC is provided with identical virtual mac address group, described professional virtual mac address group comprises at least two professional virtual mac address that are associated with the different business group, so it is all different to cause newly grasping the gratuitous ARP packet and the ARP record that NFC refreshes of IAC issue of related service group ownership.For present embodiment step or the notion identical with the 3rd embodiment, just repeat no more, detailed content is please described referring to the 3rd embodiment.

Step 610: for a mutually redundant IAC21 and the 2nd IAC22 are provided with common professional virtual ip address group and common virtual mac address group.Described professional virtual ip address group comprises two professional virtual ip address that are associated with the different business group: the professional virtual ip address 10.1.1.3 and the professional virtual ip address 10.1.1.4 that is associated with second service groups that are associated with first service groups.Described virtual mac address group comprises two professional virtual ip address that are associated with the different business group: the professional virtual mac address 00.00.00.00.00.05 and the professional virtual mac address 00.00.00.00.00.06 that is associated with second service groups that are associated with first service groups.Particularly, for first service groups, an IAC21 has identical professional virtual mac address 00.00.00.00.00.05 with the 2nd IAC22; For second service groups, an IAC21 has identical professional virtual mac address 00.00.00.00.00.06 with the 2nd IAC22.

Step 620: an IAC21 carries out load balancing with the 2nd IAC22 based on different service groups, and each IAC is to its ARP request refusal response from the relevant professional virtual ip address of control service groups.

If it is the message of 10.1.1.3 that NFC23 receives purpose IP address first, owing to do not learn relevant ARP (address resolution protocol) content before this, broadcasting IP address is the ARP request of 10.1.1.3.The one IAC21 and the 2nd IAC22 can receive this ARP request, and both virtual ip address all have 10.1.1.3.The one IAC21 finds that the service groups of this professional virtual ip address association of 10.1.1.3 is first service groups, the own at present control to first service groups is master control, thereby responding this ARP request, the IP address of informing NFC23 oneself is that 10.1.1.3, MAC Address are 00.00.00.00.00.05 (being associated with the virtual mac address of first service groups).The 2nd IAC22 finds that the service groups of this professional virtual ip address association of 10.1.1.3 is first service groups, and the own at present control to first service groups is from control, therefore abandons this message and is not responded.

The arp response that NFC23 replys according to an IAC21 obtains the corresponding relation between virtual ip address 10.1.1.3 and the professional virtual mac address 00.00.00.00.00.05.Meanwhile, because the arp response message that an IAC21 replys enters NFC23 by first interface 241, so NFC23 can also obtain the corresponding relation of the professional virtual mac address 00.00.00.00.00.05 and first interface 241.NFC23 can give record by list item, usually as ARP list item and MAC address entries after obtaining above-mentioned routing iinformation.And then, NFC23 will be that the message of 10.1.1.3 is transmitted to the IAC that professional virtual mac address is 00.00.00.00.00.05 by first interface 241 with purpose IP, because the just IAC 21 that first interface 241 connects, the flow that therefore arrives IP address 10.1.1.3 (promptly being associated with first service groups) all can send to an IAC 21.

In like manner, NFC23 can be that the message (promptly being associated with second service groups) of 10.1.1.4 is transmitted to the IAC that professional virtual mac address is 00.00.00.00.00.06 by second interface 251 with purpose IP, because just the 2nd IAC 22 that second interface 251 connects, the flow that therefore arrives IP address 10.1.1.4 all can send to the 2nd IAC 22.

Step 630: an IAC21 breaks down or other reasons, cause the 2nd IAC22 to the control of first service groups by switching to master control from control.Modal example is that an IAC21 breaks down, and it just can't finish the master control work to first service groups so, must be taken over by the 2nd IAC22, and then the 2nd IAC22 to the control of second service groups by switching to master control from control.Priority competition causes example that control changes please referring to the described related content of step 530, repeats no more herein.

Step 640: the 2nd IAC22 to the control of first service groups by when control switches to master control, initiatively send the gratuitous ARP packet of virtual ip address 10.1.1.3, announce that in this gratuitous ARP packet the MAC Address of virtual ip address 10.1.1.3 correspondence is virtual mac address 00.00.00.00.00.05.The gratuitous ARP packet of this virtual ip address 10.1.1.3 is used for the corresponding relation that trigger NFC 23 refreshes virtual ip address 10.1.1.3 and real MAC address.

In step 620, carried, when an IAC21 was main IAC, the MAC Address of IP address 10.1.1.3 correspondence was an IAC21 and the total virtual mac address 00.00.00.00.00.05 (promptly being associated with the professional virtual mac address of first service groups) of the 2nd IAC22 in the ARP list item that NFC23 learns.After this, because NFC23 receives the gratuitous ARP packet that the 2nd IAC22 initiatively issues, will refresh original routing iinformation according to this message.Particularly, what the gratuitous ARP packet of the 2nd IAC21 issue was announced is the professional virtual mac address 00.00.00.00.00.05 that remains related with first service groups with the corresponding MAC Address of IP address 10.1.1.3, therefore the IP address 10.1.1.3 of NFC record and the corresponding relation between the MAC Address 00.00.00.00.00.05 do not change, and need not to refresh.But,, be second interface 251 so NFC23 this time obtains the interface of virtual mac address 00.00.00.00.00.05 correspondence because the gratuitous ARP packet that the 2nd IAC 22 sends enters NFC23 by second interface 251; And the interface of the virtual mac address 00.00.00.00.00.05 correspondence of the NFC that (sees step 620 for details) before this record is first interface 241.So NFC just needs refresh MAC Address and the interface corresponding relation that has write down according to the gratuitous ARP packet that newly receives, change the interface of MAC Address 00.00.00.00.00.05 correspondence into second interface 251 by first interface 241.

After this, if the flow of new this IP address of arrival 10.1.1.3 is arranged, will be sent to the IAC that virtual mac address is 00.00.00.00.00.05 by second interface 251 by NFC, because just the 2nd IAC 22 that second interface 251 connects, the flow that therefore arrives IP address 10.1.1.3 all can send to the 2nd IAC 22.

This shows, new the 2nd IAC22 of the first service groups ownership that grasps is by the issue gratuitous ARP packet, make NFC the flow (related service in first service groups) of new this IP address of arrival 10.1.1.3 can be sent to the 2nd IAC 22 of new grasp ownership, rather than an IAC21 of former grasp ownership, realized the smooth switching of IAC to related service group ownership.

The invention also discloses a kind of principal and subordinate's switched system, see also Fig. 7, it is the example structure schematic diagram of principal and subordinate's switched system of the present invention.For fear of being repeated in this description, the same concept of having introduced for preamble repeats no more.And need explanation, though the principal and subordinate's switched system shown in the present embodiment includes only two IAC, it will be appreciated by those skilled in the art that the IAC that principal and subordinate's switched system of the present invention comprises is not limited to two, can be unnecessary two according to same principle.

Described principal and subordinate's switched system comprises the first separate traffic parts IAC21 and the second separate traffic parts IAC22 that works in host mode, wherein, the first separate traffic parts IAC21 comprises that specifically first principal and subordinate's control unit 71 and an ARP requesting processing 72, the second separate traffic parts IAC22 specifically comprise second principal and subordinate's control unit 73 and the 2nd ARP requesting processing 74.For the principal and subordinate's switched system shown in the clearer explanation present embodiment, in Fig. 7, also show the forwarded parts NFC23 that has annexation with the first separate traffic parts IAC21 and the second separate traffic parts IAC22, wherein, the first separate traffic parts IAC21 and NFC23 carry out data interaction by first interface 241, and the second separate traffic parts IAC22 and NFC23 carry out data interaction by second interface 251.Below in conjunction with shown in the concrete operation principle of principal and subordinate's switched system describe.

The one IAC21 has identical virtual ip address 10.1.1.3 with the 2nd IAC22, and all relate to the professional relevant configuration of an IAC21 and the 2nd IAC22 and all use this professional virtual ip address of 10.1.1.3.In addition, the real MAC address of an IAC21 is 00.00.00.00.00.01, and the real MAC address of the 2nd IAC22 is 00.00.00.00.00.02.

One among the one IAC21 and the 2nd IAC22 is main IAC, and one is from IAC.ARP requesting processing refusal response NFC23 from IAC is to ARP (address resolution protocol) request of virtual ip address (10.1.1.3), and only the ARP requesting processing by main IAC responds.Do not handle any message relevant from IAC with this virtual ip address.

Suppose an IAC21 current be main IAC, the 2nd IAC22 is current to be from IAC.If NFC23 is that to receive purpose IP address first be the message of 10.1.1.3, owing to do not learn relevant ARP (address resolution protocol) content before this, so the ARP request that to broadcast an IP address be 10.1.1.3.The one IAC21 and the 2nd IAC22 can receive this ARP request, and both virtual ip address all are 10.1.1.3, but because an IAC21 is current main IAC, therefore have only the ARP requesting processing 72 of an IAC21 to reply arp response, in this arp response message, inform the real MAC address 00.00.00.00.00.01 of NFC23 oneself to NFC23.The ARP requesting processing 74 of common the 2nd IAC22 directly abandons this ARP request message.

In the course of the work, also periodically issue the essential information message by the first essential information packet sending and receiving subelement 711 to the 2nd IAC22 as the IAC21 of main IAC, described essential information message can only be used to show oneself whether to survive.If the 2nd IAC22 periodically receives the essential information message from an IAC21, just know an IAC21 operate as normal, keep oneself from state; If the 2nd IAC22 does not receive the essential information message from an IAC21 in preset time, judge that then an IAC21 may break down, newly be elected as main IAC at once.

Preferably, the essential information message of IAC21 issue comprises the priority of oneself.And then the 2nd IAC22 compares the other side's (IAC21) priority and the priority of oneself by the second election subelement 732, if own priority is higher than the other side, then oneself newly is elected as main IAC, and the other side newly is elected as from IAC; If own priority is lower than the other side, then keep oneself from state.Certainly, if further both priority is identical, can also compares the IP address and carry out principal and subordinate's election.Generally speaking, mutually redundant IAC carries out the mutual of essential information message by principal and subordinate's control unit, and carries out principal and subordinate role's election according to mutual essential information message.

Suppose because an IAC21 breaks down or priority changes, cause the 2nd IAC22 by newly being elected as main IAC from IAC, then the 2nd ARP requesting processing 74 of the 2nd IAC22 initiatively sends the gratuitous ARP packet of virtual ip address 10.1.1.3, announces that in this gratuitous ARP packet the MAC Address of virtual ip address 10.1.1.3 correspondence is the real MAC address 00.00.00.00.00.02 of himself.The gratuitous ARP packet of this virtual ip address 10.1.1.3 is used for the corresponding relation that trigger NFC 23 refreshes virtual ip address 10.1.1.3 and real MAC address, and promptly NFC23 refreshes the MAC Address of IP address 10.1.1.3 correspondence in the ARP list item of record for 00.00.00.00.00.02 (i.e. the real MAC address of the 2nd IAC22).

In addition, because the gratuitous ARP packet that second requesting processing 74 sends enters NFC23 by second interface 251, therefore NFC23 can also obtain the corresponding relation of the real MAC address 00.00.00.00.00.02 and second interface 251, generally gives record by the MAC Address list item.After this, if the flow of new this IP address of arrival 10.1.1.3 is arranged, will be sent to the 2nd IAC22 that real MAC address is 00.00.00.00.00.02 by second interface 251 by NFC.

Be that an IAC21 and the 2nd IAC22 can also have identical virtual mac address 00.00.00.00.00.03 with corresponding second embodiment of above-mentioned preferred first embodiment except having identical virtual ip address 10.1.1.3.For avoiding repeated description, the difference part of a present embodiment and a last embodiment only is described herein.Still be that current main IAC is an example with an IAC21.

The one IAC21 replys arp response by an ARP requesting processing 72 to NFC23, informs that in this arp response message the own IP of NFC23 address is 10.1.1.3, corresponding virtual MAC Address 00.00.00.00.00.03.The 2nd ARP requesting processing 74 of common the 2nd IAC22 directly abandons this ARP request message.

And then the arp response that NFC23 replys according to an IAC21 obtains the corresponding relation between virtual ip address 10.1.1.3 and the virtual mac address 00.00.00.00.00.03.Meanwhile, because the arp response message that an IAC21 replys enters NFC23 by first interface 241, so NFC23 can also obtain the corresponding relation of the virtual mac address 00.00.00.00.00.03 and first interface 241.After this, NFC23 just can be that the message of 10.1.1.3 is transmitted to the IAC that virtual mac address is 00.00.00.00.00.03 by first interface 241 with purpose IP, because the just IAC 21 that first interface 241 connects, the flow that therefore arrives IP address 10.1.1.3 all can send to an IAC 21.

When an IAC21 breaks down or other reasons causes the principal and subordinate to be switched, when the 2nd IAC22 newly is elected as main IAC, the 2nd ARP requesting processing 74 initiatively sends the gratuitous ARP packet of virtual ip address 10.1.1.3, announces that in this gratuitous ARP packet the MAC Address of virtual ip address 10.1.1.3 correspondence is virtual mac address 00.00.00.00.00.03.Because the gratuitous ARP packet that the 2nd IAC22 sends enters NFC23 by second interface 251, is second interface 251 so NFC23 this time obtains the interface of virtual mac address 00.00.00.00.00.03 correspondence; And the interface of the virtual mac address 00.00.00.00.00.03 correspondence of NFC record is first interface 241 before this.So NFC just needs refresh MAC Address and the interface corresponding relation that has write down according to the gratuitous ARP packet that newly receives, change the interface of MAC Address 00.00.00.00.00.03 correspondence into second interface 251 by first interface 241.

After this, if the flow of new this IP address of arrival 10.1.1.3 is arranged, will be sent to the IAC that virtual mac address is 00.00.00.00.00.02 by second interface 251 by NFC, because just the 2nd IAC 22 that second interface 251 connects, the flow that therefore arrives IP address 10.1.1.3 all can send to the 2nd IAC22.

The invention also discloses principal and subordinate's switched system that a kind of holding load is shared, still describe with reference to structural representation shown in Figure 7.Because this principal and subordinate's switched system and described each embodiment of preamble belong to same inventive concept, basic principle is roughly the same, therefore highlights different piece, and it is described that same concept please refer to preamble.

A mutually redundant IAC21 and the 2nd IAC22 have common professional virtual ip address group, and described professional virtual ip address group comprises two professional virtual ip address that are associated with the different business group: the professional virtual ip address 10.1.1.3 and the professional virtual ip address 10.1.1.4 that is associated with second service groups that are associated with first service groups.Why be called the total professional virtual ip address group of an IAC21 and the 2nd IAC22, be meant that for same service groups an IAC21 has identical virtual ip address with the 2nd IAC22.With regard to first service groups, an IAC21 has identical virtual ip address 10.1.1.3 with the 2nd IAC22; With regard to second service groups, an IAC21 has identical virtual ip address 10.1.1.4 with the 2nd IAC22.In addition, the real MAC address of an IAC21 is 00.00.00.00.00.01, and the real MAC address of the 2nd IAC22 is 00.00.00.00.00.02.

The one IAC21 carries out load balancing with the 2nd IAC22 based on different service groups, and the ARP requesting processing of each IAC is to its ARP request refusal response from the relevant professional virtual ip address of control service groups.Supposing that an IAC21 is master control for the control of first service groups, is from control for the control of second service groups; The 2nd IAC22 is from control for the control of first service groups, is master control for the control of second service groups.

Under an IAC21 and the 2nd IAC22 can the situations of operate as normal, the ARP requesting processing of each IAC was to its ARP request refusal response from the relevant professional virtual ip address of control service groups.Particularly, 72 of the ARP requesting processing of the one IAC21 are responded the ARP request of the professional virtual ip address 10.1.1.3 of the first service groups association, and the ARP request to the professional virtual ip address 10.1.1.4 of the second service groups association does not respond; 74 of the 2nd ARP requesting processing of the 2nd IAC22 are responded the ARP request of the professional virtual ip address 10.1.1.4 of the second service groups association, and the ARP request to the professional virtual ip address 10.1.1.3 of the first service groups association does not respond.

If it is the message of 10.1.1.3 that NFC23 receives purpose IP address first, owing to do not learn relevant ARP (address resolution protocol) content before this, broadcasting IP address is the ARP request of 10.1.1.3.The one IAC21 finds that the service groups of this professional virtual ip address association of 10.1.1.3 is first service groups, the own at present control to first service groups is master control, thereby by this ARP request of an ARP requesting processing 72 responses, the IP address of informing NFC23 oneself is that 10.1.1.3, MAC Address are 00.00.00.00.00.01.The 2nd ARP requesting processing 74 of the 2nd IAC22 finds that the service groups of this professional virtual ip address association of 10.1.1.3 is first service groups, and the own at present control to first service groups is from control, therefore abandons this message and is not responded.

The arp response that NFC23 replys according to an IAC21 obtains the corresponding relation between virtual ip address 10.1.1.3 and the real MAC address 00.00.00.00.00.01.Meanwhile, because the arp response message that an IAC21 replys enters NFC23 by first interface 241, so NFC23 can also obtain the corresponding relation of the real MAC address 00.00.00.00.00.01 and first interface 241.After this, NFC23 will be that the message of 10.1.1.3 is transmitted to the IAC21 that real MAC address is 00.00.00.00.00.01 by first interface 241 with purpose IP.

If an IAC21 breaks down or other reasons, cause the 2nd IAC22 to the control of first service groups by switching to master control from control.Modal example is that an IAC21 breaks down, and it just can't finish the master control work to first service groups so, must be taken over by the 2nd IAC22, and then the 2nd IAC22 to the control of second service groups by switching to master control from control.In addition and content class described in aforementioned two embodiment seemingly, also may cause an IAC that the control of related service group is changed based on priority competition.Promptly carry out the mutual of essential information message, and carry out principal and subordinate's control switching of each service groups according to mutual essential information message by principal and subordinate's control unit.

For example, the IAC that backups each other of operate as normal periodically issues the essential information message by the essential information packet sending and receiving subelement in principal and subordinate's control unit, described essential information message comprises the service groups of each self-supporting and to the control priority (can also judge the IP address under the priority same case) of each service groups, and then each IAC is at war with by the control of election subelement to each service groups according to the essential information message content that receives, last each IAC has the service groups and the service groups from controlling of master control, has reached the load balancing purpose.After this,, just may certain IAC be switched by the control of some service groups if certain IAC to the control priority of some service groups variation has taken place, by switch to master control from control or by master switching to from control.

When the 2nd IAC22 to the control of first service groups by when control switches to master control, initiatively send the gratuitous ARP packet of virtual ip address 10.1.1.3 by the 2nd ARP requesting processing 74, announce that in this gratuitous ARP packet the MAC Address of virtual ip address 10.1.1.3 correspondence is the real MAC address 00.00.00.00.00.02 of himself.The gratuitous ARP packet of this virtual ip address 10.1.1.3 is used for the corresponding relation that trigger NFC 23 refreshes virtual ip address 10.1.1.3 and real MAC address.The record MAC Address corresponding with IP address 10.1.1.3 is 00.00.00.00.00.01 in the original ARP list item of NFC23, so, the MAC Address of IP address 10.1.1.3 correspondence in the ARP list item of record is refreshed for 00.00.00.00.00.02 (i.e. the real MAC address of the 2nd IAC22) by original 00.00.00.00.00.01 (i.e. the real MAC address of an IAC22).

In addition, because the gratuitous ARP packet that the 2nd IAC22 sends enters NFC23 by second interface 251, so NFC23 can also obtain the corresponding relation of the real MAC address 00.00.00.00.00.02 and second interface 251.After this, if the flow of new this IP address of arrival 10.1.1.3 is arranged, will be sent to the 2nd IAC22 that real MAC address is 00.00.00.00.00.02 by second interface 251 by NFC.

Principal and subordinate's switched system embodiment with respect to above-mentioned holding load is shared also has another execution mode.Mainly be not only to have common professional virtual ip address group, also have common virtual mac address group for a mutually redundant IAC21 and the 2nd IAC22.Described virtual mac address group comprises two professional virtual ip address that are associated with the different business group: the professional virtual mac address 00.00.00.00.00.05 and the professional virtual mac address 00.00.00.00.00.06 that is associated with second service groups that are associated with first service groups.

If it is the message of 10.1.1.3 that NFC23 receives purpose IP address first, then broadcasting the IP address is the ARP request of 10.1.1.3.Suppose that an IAC21 finds that the service groups of this professional virtual ip address association of 10.1.1.3 is first service groups, the own at present control to first service groups is master control, thereby by this ARP request of an ARP requesting processing 72 responses, the IP address of informing NFC23 oneself is that 10.1.1.3, MAC Address are 00.00.00.00.00.05 (being associated with the virtual mac address of first service groups).The 2nd IAC22 finds that the service groups of this professional virtual ip address association of 10.1.1.3 is first service groups, and the own at present control to first service groups is from control, and therefore the 2nd ARP requesting processing 74 abandons this message and do not responded.

The arp response that NFC23 replys according to an IAC21 obtains the corresponding relation between virtual ip address 10.1.1.3 and the professional virtual mac address 00.00.00.00.00.05.Meanwhile, because the arp response message that an IAC21 replys enters NFC23 by first interface 241, so NFC23 can also obtain the corresponding relation of the professional virtual mac address 00.00.00.00.00.05 and first interface 241.And then, NFC23 will be that the message of 10.1.1.3 is transmitted to the IAC that professional virtual mac address is 00.00.00.00.00.05 by first interface 241 with purpose IP, because the just IAC 21 that first interface 241 connects, the flow that therefore arrives IP address 10.1.1.3 (promptly being associated with first service groups) all can send to an IAC 21.

When an IAC21 breaks down or other reasons, cause the 2nd IAC22 to the control of first service groups by when control switches to master control, the 2nd ARP requesting processing 74 initiatively sends the gratuitous ARP packet of virtual ip address 10.1.1.3, announces that in this gratuitous ARP packet the MAC Address of virtual ip address 10.1.1.3 correspondence is virtual mac address 00.00.00.00.00.05.The gratuitous ARP packet of this virtual ip address 10.1.1.3 is used for the corresponding relation that trigger NFC 23 refreshes virtual ip address 10.1.1.3 and real MAC address.Because the gratuitous ARP packet that the 2nd IAC22 sends enters NFC23 by second interface 251, is second interface 251 so NFC23 this time obtains the interface of virtual mac address 00.00.00.00.00.05 correspondence; And the interface of the virtual mac address 00.00.00.00.00.05 correspondence of NFC record is first interface 241 before this.So NFC just needs refresh MAC Address and the interface corresponding relation that has write down according to the gratuitous ARP packet that newly receives, change the interface of MAC Address 00.00.00.00.00.05 correspondence into second interface 251 by first interface 241.

After this, if the flow of new this IP address of arrival 10.1.1.3 is arranged, will be sent to the IAC that virtual mac address is 00.00.00.00.00.05 by second interface 251 by NFC, because just the 2nd IAC 22 that second interface 251 connects, the flow that therefore arrives IP address 10.1.1.3 all can send to the 2nd IAC22.

More than master-slave switching method and principal and subordinate's switched system of a kind of device that backups each other provided by the present invention is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims

1, a kind of master-slave switching method of the device that backups each other, described device are the separate traffic parts IAC that works among the open application architecture OAA of host mode, it is characterized in that described mutually redundant at least two IAC have identical virtual ip address,

From the ARP request of IAC refusal response to above-mentioned virtual ip address;

When IAC newly is elected as main IAC, issue the gratuitous ARP packet of himself MAC Address and described virtual ip address corresponding relation, described gratuitous ARP packet is used for trigger NFC and refreshes the ARP record.

2, master-slave switching method as claimed in claim 1 is characterized in that, described mutually redundant at least two IAC also have identical virtual mac address,

When IAC newly is elected as main IAC, issue the gratuitous ARP packet of himself virtual mac address and virtual ip address corresponding relation, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes virtual mac address and interface.

3, master-slave switching method as claimed in claim 1 is characterized in that, described mutually redundant at least two IAC have different real MAC address,

When IAC newly is elected as main IAC, issue the gratuitous ARP packet of himself real MAC address and virtual ip address corresponding relation, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes virtual ip address and real MAC address.

4 as any described changing method in the claim 1 to 3, it is characterized in that described method also comprises: when main IAC broke down, another one is mutually redundant with it newly was elected as main IAC from IAC.

5, as any described master-slave switching method in the claim 1 to 3, it is characterized in that also comprising: new main IAC receives the service traffics from the described virtual ip address of new arrival of NFC.

6, as any described master-slave switching method in the claim 1 to 3, it is characterized in that described method also comprises: mutually redundant IAC carries out principal and subordinate role's election according to mutual essential information message.

7, a kind of principal and subordinate's switched system comprises mutually redundant at least two the separate traffic parts IAC that work in host mode among the OAA, it is characterized in that the described IAC of backuping each other has identical virtual ip address,

Each IAC comprises the ARP requesting processing, in order at described IAC by the gratuitous ARP packet of when IAC newly is elected as main IAC, issuing himself MAC Address and described virtual ip address corresponding relation, described gratuitous ARP packet is used for trigger NFC and refreshes the ARP record;

When described IAC as from IAC the time, its ARP requesting processing refusal response is to the ARP request of above-mentioned virtual ip address.

8, principal and subordinate's switched system as claimed in claim 7, it is characterized in that, the described IAC of backuping each other also has identical virtual mac address, above-mentioned ARP requesting processing IAC under it is comprised by the gratuitous ARP packet of issuing when IAC newly is elected as main IAC: the corresponding relation of self virtual mac address and virtual ip address, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes virtual mac address and interface.

9, principal and subordinate's switched system as claimed in claim 7, it is characterized in that, the described IAC of backuping each other has different real MAC address, above-mentioned ARP requesting processing IAC under it is comprised by the gratuitous ARP packet of issuing when IAC newly is elected as main IAC: the corresponding relation of self real MAC address and virtual ip address, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes virtual ip address and real MAC address.

10, as any described principal and subordinate's switched system in the claim 7 to 9, it is characterized in that each IAC also comprises principal and subordinate's control unit, in order to carry out principal and subordinate role's election according to mutual essential information message.

11, a kind of master-slave switching method of the device that backups each other, described device is the separate traffic parts IAC that works among the open application architecture OAA of host mode, it is characterized in that, described mutually redundant at least two IAC have identical professional virtual ip address group, described professional virtual ip address group comprises at least two professional virtual ip address that are associated with the different business group

12, master-slave switching method as claimed in claim 11, it is characterized in that, described mutually redundant at least two IAC also have identical professional virtual mac address group, and described professional virtual mac address group comprises at least two professional virtual mac address that are associated with the different business group

IAC with the control of its service groups by when control switches to master control, issue the professional virtual ip address of described service groups association and the gratuitous ARP packet of professional virtual mac address corresponding relation, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes professional virtual mac address and interface.

13, master-slave switching method as claimed in claim 11 is characterized in that, described mutually redundant at least two IAC have different real MAC address,

IAC with the control of its service groups by when control switches to master control, issue the professional virtual ip address of described service groups association and the gratuitous ARP packet of himself real MAC address corresponding relation, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes professional virtual ip address and real MAC address.

14, as any described master-slave switching method in the claim 11 to 13, it is characterized in that described method also comprises:

When an IAC breaks down, the IAC that takes over job with the control of its corresponding service groups by switching to master control from control.

15, as any described master-slave switching method in the claim 11 to 13, it is characterized in that also comprising: newly grasp the flow of the IAC reception of service groups ownership from the professional virtual ip address of the described service groups association of the arrival of NFC.

16, a kind of principal and subordinate's switched system, comprise mutually redundant at least two the separate traffic parts IAC that work in host mode among the OAA, it is characterized in that, the described IAC of backuping each other has identical professional virtual ip address group, described professional virtual ip address group comprises at least two professional virtual ip address that are associated with the different business group, and the IAC that backups each other carries out load balancing based on different service groups;

17, master-slave switching method as claimed in claim 16 is characterized in that, the described IAC of backuping each other also has identical professional virtual mac address group, and described professional virtual mac address group comprises at least two professional virtual mac address that are associated with the different business group,

18, master-slave switching method as claimed in claim 16 is characterized in that, the described IAC of backuping each other has different real MAC address,

Described IAC with the control of its service groups by when control switches to master control, the gratuitous ARP packet of its ARP requesting processing issue comprises: the gratuitous ARP packet of the professional virtual ip address of described service groups association and himself real MAC address corresponding relation, described gratuitous ARP packet is used for the corresponding relation that trigger NFC refreshes professional virtual ip address and real MAC address.

19, as any described master-slave switching method in the claim 16 to 18, it is characterized in that each IAC also comprises principal and subordinate's control unit, switch in order to principal and subordinate's control of carrying out each service groups according to mutual essential information message.