CN103945016B - A kind of method and system of Dynamic Host Configuration Protocol server master-slave redundancy - Google Patents
A kind of method and system of Dynamic Host Configuration Protocol server master-slave redundancy Download PDFInfo
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Abstract
The present invention provides a kind of method and system of Dynamic Host Configuration Protocol server redundancy, wherein, the method includes：Main Dynamic Host Configuration Protocol server and spare Dynamic Host Configuration Protocol server start, and the main Dynamic Host Configuration Protocol server and spare Dynamic Host Configuration Protocol server share IP address pond；If main Dynamic Host Configuration Protocol server work, main Dynamic Host Configuration Protocol server cooperate with spare Dynamic Host Configuration Protocol server to obtain standby server list；Main Dynamic Host Configuration Protocol server is by the spare Dynamic Host Configuration Protocol server on the standby server list synchronization of acquisition to the standby server list；After main Dynamic Host Configuration Protocol server breaks down, judgement is switched over by the spare Dynamic Host Configuration Protocol server in the standby server list, is switched by the spare Dynamic Host Configuration Protocol server for meeting switching condition and continues to work based on the IP address pond for main Dynamic Host Configuration Protocol server.The present invention takes full advantage of IP address in the case of Dynamic Host Configuration Protocol server master-slave redundancy.
Description
Technical field
The present invention relates to dynamic host configuration protocol DHCP server active-standby switch field more particularly to a kind of DHCP services
The method and system of device redundancy.
Background technology
With the extensive use of computer network and the continuous expansion of network size, the maintenance and management work of network is got over
Come more difficult and numerous and diverse, therefore a series of management and configuration protocol are proposed to the automatic management of network.1993
In October in year, dynamic host configuration protocol DHCP becomes standard agreement, for the automatic distribution of IP address.
Host in network obtains the IP address and mesh network of oneself to Dynamic Host Configuration Protocol server according to the regulation of DHCP protocol
The information such as pass, dns server address.DHCP protocol is defined in RFC2131, this specification defines Dynamic Host Configuration Protocol server and visitor
Interactive standards between the end of family.
There is a situation where that multiple Dynamic Host Configuration Protocol server are described to same LAN in RFC2131.In RFC2131 documents
Description in, the IP address range that each Dynamic Host Configuration Protocol server possesses is Uncrossed, that is, independent work between Dynamic Host Configuration Protocol server
Make.After every Dynamic Host Configuration Protocol server receives the DHCPDISCOVER broadcasting packets of client transmission, this clothes can be sent to client
Idle IP address, client select an available IP address in these different DHCPOFFER in device address pool of being engaged in.
In catenet, in order to ensure the reliability of DHCP service, need to realize the redundancy of Dynamic Host Configuration Protocol server.It is general
Way is, according to 8：2 ratio divides IP available address pool total in network, wherein 80% IP address distributes to main clothes
Business device, 20% IP address distribute to backup server.After main Dynamic Host Configuration Protocol server breaks down, made by backup Dynamic Host Configuration Protocol server
Service is provided clients with remaining 20%IP addresses.This mechanism meets the demand of backup to a certain extent, however this
The either main Dynamic Host Configuration Protocol server work of method or the work of spare Dynamic Host Configuration Protocol server, the IP address that can distribute to dhcp client are equal
Only part IP address, so as to cause the waste of IP address.
Invention content
The present invention provides a kind of method and system of Dynamic Host Configuration Protocol server master-slave redundancy, how to solve in Dynamic Host Configuration Protocol server
In the case of master-slave redundancy, the technical issues of making full use of IP address.
In order to solve the above technical problems, a kind of method of Dynamic Host Configuration Protocol server redundancy of the present invention, the method includes：
Main Dynamic Host Configuration Protocol server and spare Dynamic Host Configuration Protocol server start, and the main Dynamic Host Configuration Protocol server and spare Dynamic Host Configuration Protocol server are shared
IP address pond；
If main Dynamic Host Configuration Protocol server work, main Dynamic Host Configuration Protocol server cooperate with spare Dynamic Host Configuration Protocol server to obtain standby server list；
Main Dynamic Host Configuration Protocol server will be spare on the standby server list synchronization of acquisition to the standby server list
Dynamic Host Configuration Protocol server；
After main Dynamic Host Configuration Protocol server breaks down, cut by the spare Dynamic Host Configuration Protocol server in the standby server list
Judgement is changed, is switched by the spare Dynamic Host Configuration Protocol server for meeting switching condition and continued for main Dynamic Host Configuration Protocol server based on the IP address Chi works
Make.
Further, the main Dynamic Host Configuration Protocol server collaboration standby server obtains standby server list, including：
Main Dynamic Host Configuration Protocol server fixed time broadcast heartbeat packet；
The spare Dynamic Host Configuration Protocol server for receiving the heartbeat packet of main Dynamic Host Configuration Protocol server broadcast returns to unicast to main Dynamic Host Configuration Protocol server
Heartbeat packet；
If main Dynamic Host Configuration Protocol server receives the unicast heartbeat packet returned from spare Dynamic Host Configuration Protocol server, by the spare DHCP
Server storage is into standby server list；
If main DHCP is come from without receiving to spare DHCP service existing in standby server list in preset time
The unicast heartbeat packet that device returns, then delete corresponding spare Dynamic Host Configuration Protocol server from the standby server list.
Further, it is described after main Dynamic Host Configuration Protocol server breaks down, by spare in the standby server list
Dynamic Host Configuration Protocol server switches over judgement, when meeting switching condition, switches and is continuing with the IP address for main Dynamic Host Configuration Protocol server
Pond provides service, including：
After main Dynamic Host Configuration Protocol server breaks down, the spare Dynamic Host Configuration Protocol server of the standby server list is received standby
The corresponding standby server of minimum IP address is searched with server list, judges whether itself is the standby server, if so,
It is then main Dynamic Host Configuration Protocol server by itself switching；
If standby server switching fails for main Dynamic Host Configuration Protocol server, then by removing the standby server in standby server list
Except standby server standby server list lookup minimum the corresponding standby server of IP address, until find it is standby
It is without the standby server for lookup in main Dynamic Host Configuration Protocol server or standby server list with server successful switch.
Further, the method further includes：
Main Dynamic Host Configuration Protocol server provides DHCP leases file, the DHCP generated in service process after work for dhcp client
History lease cache file；
When main Dynamic Host Configuration Protocol server is in standby server list, DHCP leases file and the DHCP history leases for judging to obtain
It, will be in updated content synchronization to newest standby server list after at least one in cache file three changes
Spare Dynamic Host Configuration Protocol server；
After the spare Dynamic Host Configuration Protocol server switching in standby server list is main Dynamic Host Configuration Protocol server, also based on DHCP leases
File, the work of DHCP history leases cache file.
Further, the spare Dynamic Host Configuration Protocol server switching is after main Dynamic Host Configuration Protocol server, further includes：
The virtual ip address that the main Dynamic Host Configuration Protocol server before the binding switching of main Dynamic Host Configuration Protocol server after switching uses.
Further, the method further includes：
If main Dynamic Host Configuration Protocol server does not work, spare Dynamic Host Configuration Protocol server is established the available server comprising own IP address and is arranged
Table, and broadcast heartbeat packet；
The standby server received after the heartbeat packet that other standby servers are broadcasted, to broadcasting the heartbeat packet
Standby server returns to unicast heartbeat packet；
If standby server receives the unicast heartbeat packet returned from other spare Dynamic Host Configuration Protocol server, by this other it is standby
It is stored with Dynamic Host Configuration Protocol server into the available server list；
Spare Dynamic Host Configuration Protocol server is in the corresponding spare Dynamic Host Configuration Protocol server of available server list lookup minimum IP address, judgement
Whether itself is the spare Dynamic Host Configuration Protocol server, if it is, being main Dynamic Host Configuration Protocol server by itself switching；
If standby server switching fails for main Dynamic Host Configuration Protocol server, then by removing the standby server in available server list
Except standby server available server list lookup minimum the corresponding standby server of IP address, until find it is standby
It is main Dynamic Host Configuration Protocol server with server successful switch；
After the heartbeat packet for receiving main Dynamic Host Configuration Protocol server fixed time broadcast, spare Dynamic Host Configuration Protocol server is gone off the air heartbeat packet, to
The main Dynamic Host Configuration Protocol server returns to unicast heartbeat packet.
In order to solve the above technical problems, the present invention also provides a kind of Dynamic Host Configuration Protocol server redundant system, the system comprises
Main Dynamic Host Configuration Protocol server and the spare Dynamic Host Configuration Protocol server that IP address pond is shared with main Dynamic Host Configuration Protocol server, wherein,
The main Dynamic Host Configuration Protocol server, for after it starts and works, spare Dynamic Host Configuration Protocol server being cooperateed with to obtain active service
Device list；By the spare Dynamic Host Configuration Protocol server in the standby server list synchronization of acquisition to the standby server list；
The spare Dynamic Host Configuration Protocol server, for main Dynamic Host Configuration Protocol server to be cooperateed with to obtain standby server list；Receive main DHCP
The standby server list that server is sent；And after main Dynamic Host Configuration Protocol server breaks down, by standby in standby server list
Judgement is switched over Dynamic Host Configuration Protocol server, when meeting switching condition, switches and continues based on the IP for main Dynamic Host Configuration Protocol server
Location pond works.
Further, main Dynamic Host Configuration Protocol server is cooperateed with spare Dynamic Host Configuration Protocol server obtains standby server list, including：
Main Dynamic Host Configuration Protocol server, for fixed time broadcast heartbeat packet；Receive the unicast heart returned from spare Dynamic Host Configuration Protocol server
After jumping packet, which is stored into standby server list；If it is not received by provide for oneself in preset time
The unicast heartbeat packet returned with spare Dynamic Host Configuration Protocol server existing in server list, then by for spare Dynamic Host Configuration Protocol server from
It is deleted in the standby server list；
Spare Dynamic Host Configuration Protocol server after receiving the heartbeat packet of main Dynamic Host Configuration Protocol server broadcast, is returned to main Dynamic Host Configuration Protocol server
Receipt broadcasts heartbeat packet.
Further, the spare Dynamic Host Configuration Protocol server, after working as main Dynamic Host Configuration Protocol server failure, by standby server
Spare Dynamic Host Configuration Protocol server in list switches over judgement, when meeting switching condition, switches and continues to make for main Dynamic Host Configuration Protocol server
Service is provided with the IP address pond, including：
The spare Dynamic Host Configuration Protocol server, it is described standby by receiving for after judging that main Dynamic Host Configuration Protocol server breaks down
With the spare Dynamic Host Configuration Protocol server of server list in the corresponding standby server of standby server list lookup minimum IP address, sentence
Whether disconnected itself is the standby server, if it is, being main Dynamic Host Configuration Protocol server by itself switching；And judging spare clothes
When being engaged in device switching as the failure of main Dynamic Host Configuration Protocol server, by the standby server in standby server list in addition to the standby server
Continue the corresponding standby server of IP address in standby server list lookup minimum, until the standby server success found
Switch be in main Dynamic Host Configuration Protocol server or standby server list without for lookup standby server.
Further, which is characterized in that
The main Dynamic Host Configuration Protocol server is additionally operable to after work provide generation DHCP leases in service process for dhcp client
Information, DHCP history lease cache files；And in standby server list, DHCP leases information and the DHCP for judging to obtain
After at least one in history lease cache file three changes, by updated content synchronization to newest active service
Spare Dynamic Host Configuration Protocol server in device list；
Spare Dynamic Host Configuration Protocol server in the standby server list is additionally operable to switching after main Dynamic Host Configuration Protocol server, to be based on
DHCP leases file and the work of DHCP history leases cache file.
Further,
The standby server is additionally operable to itself switching as after main Dynamic Host Configuration Protocol server, the main DHCP before binding switching takes
The virtual ip address that business device uses.
Further, which is characterized in that
The spare Dynamic Host Configuration Protocol server is additionally operable to after judging that main Dynamic Host Configuration Protocol server does not work, and is established comprising itself IP
The available server list of address, and broadcast heartbeat packet；It receives after the heartbeat packet that other standby servers are broadcasted, Xiang Guang
The standby server for broadcasting the heartbeat packet returns to unicast heartbeat packet；If receive the unicast returned from other spare Dynamic Host Configuration Protocol server
Heartbeat packet then stores other spare Dynamic Host Configuration Protocol server into the available server list；In available server list lookup
The corresponding spare Dynamic Host Configuration Protocol server of minimum IP address, judges whether itself is the spare Dynamic Host Configuration Protocol server, if it is, by itself
Switch as main Dynamic Host Configuration Protocol server；And after judging standby server switching for the failure of main Dynamic Host Configuration Protocol server, then by available clothes
The standby server being engaged in device list in addition to the standby server is corresponded in the IP address of available server list lookup minimum
Standby server, until the standby server successful switch that finds is main Dynamic Host Configuration Protocol server；Main Dynamic Host Configuration Protocol server is received to determine
When the heartbeat packet broadcasted after, spare Dynamic Host Configuration Protocol server is gone off the air heartbeat packet, and unicast heartbeat packet is returned to the main Dynamic Host Configuration Protocol server.
The active and standby Dynamic Host Configuration Protocol server of the embodiment above ensure that using the identical address pool for storing whole IP address
Either master server work or standby server work can use whole IP address, provide the utilization of IP address
Rate.
Description of the drawings
Fig. 1 is the method flow diagram of the Dynamic Host Configuration Protocol server master-slave redundancy of the present embodiment；
Fig. 2 is the system composition figure of the Dynamic Host Configuration Protocol server master-slave redundancy of the present embodiment.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature mutually can arbitrarily combine.
Fig. 1 is the method flow diagram of the Dynamic Host Configuration Protocol server master-slave redundancy of the present embodiment.
The main Dynamic Host Configuration Protocol server of S101 and spare Dynamic Host Configuration Protocol server start, the main Dynamic Host Configuration Protocol server and spare Dynamic Host Configuration Protocol server
Shared IP address pond；
Configuration file is set for each Dynamic Host Configuration Protocol server, configuration file includes standby usage mark, IP address lease duration, IP
Address pool information；Dynamic Host Configuration Protocol server starts according to configuration file；
S102 judges whether main Dynamic Host Configuration Protocol server works, if work, performs step S103;Otherwise, step S104 is performed;
The main Dynamic Host Configuration Protocol server of S103 cooperates with spare Dynamic Host Configuration Protocol server to obtain standby server list, performs S105；
The method that main Dynamic Host Configuration Protocol server cooperates with spare Dynamic Host Configuration Protocol server to obtain standby server list includes：Main DHCP service
Device fixed time broadcast heartbeat packet；The spare Dynamic Host Configuration Protocol server of the heartbeat packet of main Dynamic Host Configuration Protocol server broadcast is received to main Dynamic Host Configuration Protocol server
Return to unicast heartbeat packet；If main Dynamic Host Configuration Protocol server receives the unicast heartbeat packet returned from spare Dynamic Host Configuration Protocol server, should
Spare Dynamic Host Configuration Protocol server is stored into standby server list；If main DHCP is come from without receiving to active service in preset time
The unicast heartbeat packet that existing spare Dynamic Host Configuration Protocol server returns in device list, then by corresponding spare Dynamic Host Configuration Protocol server from described standby
It is deleted in server list；
After the work of main Dynamic Host Configuration Protocol server, main Dynamic Host Configuration Protocol server provides IP Rental Services for dhcp client, and generates
DHCP leases file, DHCP history lease cache files；The lease file includes multiple lease entries, and each lease entry is equal
Record IP address, lease entry-into-force time, lease end time, the MAC Address of binding, user rs host name, status information；Wherein,
IP address be the IP address leased, lease entry-into-force time and lease end time record be it is corresponding lease IP address it is effective when
Between range, binding MAC Address record be rent whether the NIC address of this IP, state recording this lease entry change
Become, such as whether client extends lease to be continuing with this IP address.When dhcp client does not use this rent
About entry or lease entry it is expired after, main Dynamic Host Configuration Protocol server deletes the lease entry from lease file, this lease
Entry is added to DHCP history lease cache files；
The spare Dynamic Host Configuration Protocol server of S104 selects main Dynamic Host Configuration Protocol server of the server as work, performs step S103；
Main Dynamic Host Configuration Protocol server of the server as work is selected from spare Dynamic Host Configuration Protocol server, including：
Spare Dynamic Host Configuration Protocol server foundation includes the available server list of own IP address, and broadcast heartbeat packet；It is described standby
It is received after the heartbeat packet that other standby servers are broadcasted with server, is returned to the standby server for broadcasting the heartbeat packet
Unicast heartbeat packet；
If standby server receives the unicast heartbeat packet returned from other spare Dynamic Host Configuration Protocol server, by this other it is standby
It is stored with Dynamic Host Configuration Protocol server into the available server list；
Spare Dynamic Host Configuration Protocol server is in the corresponding spare Dynamic Host Configuration Protocol server of available server list lookup minimum IP address, judgement
Whether itself is the spare Dynamic Host Configuration Protocol server, if it is, being main Dynamic Host Configuration Protocol server by itself switching；
If standby server switching fails for main Dynamic Host Configuration Protocol server, then by removing the standby server in available server list
Except standby server available server list lookup minimum the corresponding standby server of IP address, until find it is standby
It is main Dynamic Host Configuration Protocol server with server successful switch；
Main Dynamic Host Configuration Protocol server after switching continues fixed time broadcast heartbeat packet, receives the heart of main Dynamic Host Configuration Protocol server fixed time broadcast
After jumping packet, spare Dynamic Host Configuration Protocol server is gone off the air heartbeat packet, and unicast heartbeat packet is returned to the main Dynamic Host Configuration Protocol server；
Standby usage can also be identified and broadcasted together, so as to receive the heart when broadcasting heartbeat packet by primary, spare Dynamic Host Configuration Protocol server
The spare Dynamic Host Configuration Protocol server for jumping packet judges that the heartbeat packet of broadcast comes autonomous Dynamic Host Configuration Protocol server or spare Dynamic Host Configuration Protocol server；
The main Dynamic Host Configuration Protocol server of S105 will be spare on the standby server list synchronization to standby server list of acquisition
Dynamic Host Configuration Protocol server；
Spare Dynamic Host Configuration Protocol server in S106 standby server lists judges whether main DHCP breaks down, if there is event
Barrier, switches over judgement, by meeting the spare of switching condition by the spare Dynamic Host Configuration Protocol server in the standby server list
Dynamic Host Configuration Protocol server switching continues to work based on the IP address pond for main Dynamic Host Configuration Protocol server；
Standby server judges that the method that main Dynamic Host Configuration Protocol server breaks down is：When standby server is in the first preset duration
The interior heartbeat packet of signal, such as broadcast for being not received by main Dynamic Host Configuration Protocol server and sending, then it is assumed that event occurs in main Dynamic Host Configuration Protocol server
Barrier；
After the spare Dynamic Host Configuration Protocol server in standby server list judges that main Dynamic Host Configuration Protocol server breaks down, search most
The corresponding standby server of small IP address, judges whether itself is the standby server, if it is, based on itself switching
Dynamic Host Configuration Protocol server；
If the spare Dynamic Host Configuration Protocol server in standby server list judges that standby server switching is main DHCP service
Device fails, then by the standby server in standby server list in addition to the standby server in standby server list lookup
The minimum corresponding standby server of IP address, until the standby server successful switch found is main Dynamic Host Configuration Protocol server or spare
Without the standby server for lookup in server list；Judge method of the standby server switching for the failure of main Dynamic Host Configuration Protocol server
For：The signal that main Dynamic Host Configuration Protocol server transmission is not received by the second preset duration then judges handover failure, wherein, second is default
Time length ratio the first preset duration duration is long.
In other embodiments, to ensure taking over seamlessly for active/standby server, main Dynamic Host Configuration Protocol server needs will be after work
The DHCP leases file generated in service process is provided for dhcp client, DHCP history lease cache files be synchronized to it is described standby
With the spare Dynamic Host Configuration Protocol server in server list；When main Dynamic Host Configuration Protocol server judge obtain standby server list,
After at least one in DHCP leases file and DHCP history lease cache file threes changes, i.e., by updated content
The spare Dynamic Host Configuration Protocol server being synchronized in newest standby server list.Treat the spare DHCP service in standby server list
Device switching is after main Dynamic Host Configuration Protocol server, works based on DHCP leases file, DHCP history lease cache files and IP address pond.
Further, it is transparent to client to protect the active and standby Dynamic Host Configuration Protocol server switching action of sign, it can be in spare Dynamic Host Configuration Protocol server
Switch after main Dynamic Host Configuration Protocol server, to be continuing with the virtual ip address identical with the main Dynamic Host Configuration Protocol server before switching, so no matter
How active and standby Dynamic Host Configuration Protocol server switches, and the server virtual IP address to communicate with dhcp client is unique, will not interrupt
The business of DHCP customer sides.
After main Dynamic Host Configuration Protocol server switches, since the MAC Address of main DHCP switches, need to notify DHCP client
End updates the MAC Address of main Dynamic Host Configuration Protocol server, to maintain the network connection between dhcp client and Dynamic Host Configuration Protocol server.
Fig. 2 is the system composition figure of the Dynamic Host Configuration Protocol server redundancy of the present embodiment.
The system includes main Dynamic Host Configuration Protocol server and the spare Dynamic Host Configuration Protocol server in IP address pond is shared with main Dynamic Host Configuration Protocol server,
In,
Main Dynamic Host Configuration Protocol server, for spare Dynamic Host Configuration Protocol server after it starts and works, to be cooperateed with to obtain standby server row
Table；And by the spare Dynamic Host Configuration Protocol server in the standby server list synchronization of acquisition to the standby server list；
The main Dynamic Host Configuration Protocol server is additionally operable to after work provide generation DHCP leases in service process for dhcp client
Information, DHCP history lease cache files；The lease file includes multiple lease entries, and each lease entry is with recording IP
Location, lease entry-into-force time, lease end time, the MAC Address of binding, user rs host name, status information；Wherein, IP address is
The IP address leased, lease entry-into-force time and lease end time record be the corresponding effective time range for leasing IP address,
The MAC Address record of binding has been to rent whether the NIC address of this IP, state recording this lease entry change, such as
Whether client extends lease to be continuing with this IP address；When dhcp client do not use this lease entry or
After person's lease entry is expired, main Dynamic Host Configuration Protocol server deletes the lease entry from lease file, this lease entry is added
To DHCP history lease cache files；
Spare Dynamic Host Configuration Protocol server, for main Dynamic Host Configuration Protocol server to be cooperateed with to obtain standby server list；Receive main DHCP service
The standby server list that device is sent；And after main Dynamic Host Configuration Protocol server breaks down, by spare in standby server list
Dynamic Host Configuration Protocol server switches over judgement, when meeting switching condition, switches and continues for main Dynamic Host Configuration Protocol server based on the IP address
Pond works.
Above-mentioned main Dynamic Host Configuration Protocol server is cooperateed with spare Dynamic Host Configuration Protocol server obtains standby server list, including：
Main Dynamic Host Configuration Protocol server, for fixed time broadcast heartbeat packet；Receive the unicast heart returned from spare Dynamic Host Configuration Protocol server
After jumping packet, which is stored into standby server list；If it is not received by provide for oneself in preset time
The unicast heartbeat packet returned with spare Dynamic Host Configuration Protocol server existing in server list, then by for spare Dynamic Host Configuration Protocol server from
It is deleted in the standby server list；
Spare Dynamic Host Configuration Protocol server after receiving the heartbeat packet of main Dynamic Host Configuration Protocol server broadcast, is returned to main Dynamic Host Configuration Protocol server
Receipt broadcasts heartbeat packet.
Above-mentioned spare Dynamic Host Configuration Protocol server is judged after main Dynamic Host Configuration Protocol server breaks down, by standby server list
Spare Dynamic Host Configuration Protocol server switch over judgement, when meeting switching condition, switch as main Dynamic Host Configuration Protocol server, including：
The spare Dynamic Host Configuration Protocol server, after judging that main Dynamic Host Configuration Protocol server breaks down, by receiving the spare clothes
Be engaged in device list spare Dynamic Host Configuration Protocol server in the corresponding standby server of standby server list lookup minimum IP address, judge from
Whether body is the standby server, if it is, being main Dynamic Host Configuration Protocol server by itself switching；And judging standby server
Switch when failing for main Dynamic Host Configuration Protocol server, continued by the standby server in standby server list in addition to the standby server
In the corresponding standby server of IP address of standby server list lookup minimum, until the standby server successful switch found
Be in main Dynamic Host Configuration Protocol server or standby server list without for lookup standby server.
Standby server judges that the method that main Dynamic Host Configuration Protocol server breaks down is：When standby server is in the first preset duration
The interior heartbeat packet of signal, such as broadcast for being not received by main Dynamic Host Configuration Protocol server and sending, then it is assumed that event occurs in main Dynamic Host Configuration Protocol server
Barrier.
Standby server judges that the switching of other standby servers is for the method for main Dynamic Host Configuration Protocol server failure：It is default second
Duration be not received by the signal that main Dynamic Host Configuration Protocol server is sent then judge switching be by, wherein, the second preset duration is than first in advance
If duration duration is long.
Above-mentioned standby server, it may also be used for after judging that main Dynamic Host Configuration Protocol server does not work, a server is selected to make
For the main Dynamic Host Configuration Protocol server of work, including：Standby server establishes the available server list for including own IP address, and broadcasts
Heartbeat packet；Standby server is received after the heartbeat packet that other standby servers are broadcasted, to broadcast the heartbeat packet it is spare
Server returns to unicast heartbeat packet；If standby server receives the unicast heartbeat returned from other spare Dynamic Host Configuration Protocol server
Packet, then store other spare Dynamic Host Configuration Protocol server into the available server list；Standby server is arranged in available server
The corresponding spare Dynamic Host Configuration Protocol server of table search minimum IP address, judges whether itself is the spare Dynamic Host Configuration Protocol server, if it is,
It is main Dynamic Host Configuration Protocol server by itself switching；And after judging standby server switching for the failure of main Dynamic Host Configuration Protocol server, then by
Standby server in available server list in addition to the standby server is in the IP of available server list lookup minimum
The corresponding standby server in location, until the standby server successful switch found is main Dynamic Host Configuration Protocol server；
Due to the main Dynamic Host Configuration Protocol server after switching still can fixed time broadcast heartbeat packet, spare Dynamic Host Configuration Protocol server receiving come
After the heartbeat packet of autonomous Dynamic Host Configuration Protocol server broadcast, heartbeat packet of going off the air returns to unicast heartbeat packet to the main Dynamic Host Configuration Protocol server.
Standby usage can also be identified and broadcasted together, so as to receive the heart when broadcasting heartbeat packet by primary, spare Dynamic Host Configuration Protocol server
The spare Dynamic Host Configuration Protocol server for jumping packet judges that the heartbeat packet of broadcast comes autonomous Dynamic Host Configuration Protocol server or spare Dynamic Host Configuration Protocol server.
In other embodiments, to ensure taking over seamlessly for active/standby server, the main Dynamic Host Configuration Protocol server is additionally operable in work
It is provided after work for dhcp client and DHCP leases information, DHCP history lease cache files is generated in service process；And sentencing
At least one in the standby server list for acquisition, DHCP leases information and DHCP history lease cache file threes of breaking is sent out
After changing, by the spare Dynamic Host Configuration Protocol server in updated content synchronization to newest standby server list.It is described spare
Spare Dynamic Host Configuration Protocol server in server list is additionally operable to switching as after main Dynamic Host Configuration Protocol server, based on DHCP leases file, DHCP
History lease cache file and the work of IP address pond.
Further, transparent to client to protect the active and standby Dynamic Host Configuration Protocol server switching action of sign, the standby server is also used
In itself switching is continued and visitor for the virtual ip address that after main Dynamic Host Configuration Protocol server, the main Dynamic Host Configuration Protocol server before binding switching uses
Family end communicates, and no matter how active and standby Dynamic Host Configuration Protocol server switches in this way, and the virtual ip address to communicate with dhcp client is unique,
The business of DHCP customer sides will not be interrupted.After main Dynamic Host Configuration Protocol server switches, since the MAC Address of main DHCP is cut
It changes, needs the MAC Address that dhcp client is notified to update main Dynamic Host Configuration Protocol server.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and described program can be stored in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, all or part of step of above-described embodiment can also be realized using one or more integrated circuits, accordingly
Ground, the form that hardware may be used in each module/unit in above-described embodiment are realized, can also use the shape of software function module
Formula is realized.The present invention is not limited to the combinations of the hardware and software of any particular form.
It should be noted that the present invention can also have other various embodiments, without departing substantially from of the invention spiritual and its essence
In the case of, those skilled in the art can make various corresponding changes and deformation according to the present invention, but these are corresponding
Change and deform the protection domain that should all belong to appended claims of the invention.
Claims (8)
- A kind of 1. method of Dynamic Host Configuration Protocol server redundancy, which is characterized in that the method includes：Main Dynamic Host Configuration Protocol server and spare Dynamic Host Configuration Protocol server start, and the main Dynamic Host Configuration Protocol server and spare Dynamic Host Configuration Protocol server are with sharing IP Location pond；If main Dynamic Host Configuration Protocol server work, main Dynamic Host Configuration Protocol server cooperate with spare Dynamic Host Configuration Protocol server to obtain standby server list；Main Dynamic Host Configuration Protocol server takes the spare DHCP on the standby server list synchronization of acquisition to the standby server list Business device；After main Dynamic Host Configuration Protocol server breaks down, switched over and sentenced by the spare Dynamic Host Configuration Protocol server in the standby server list It is disconnected, switched by the spare Dynamic Host Configuration Protocol server for meeting switching condition and continue to work based on the IP address pond for main Dynamic Host Configuration Protocol server；Wherein, after main Dynamic Host Configuration Protocol server breaks down, the spare Dynamic Host Configuration Protocol server for receiving the standby server list exists The corresponding standby server of standby server list lookup minimum IP address, judges whether itself is the standby server, if It is then main Dynamic Host Configuration Protocol server by itself switching to be；If standby server switching for main Dynamic Host Configuration Protocol server fail, then by standby server list in addition to the standby server Standby server standby server list lookup minimum the corresponding standby server of IP address, until the spare clothes that find Business device successful switch is nothing in main Dynamic Host Configuration Protocol server or standby server list for the standby server of lookup；Main Dynamic Host Configuration Protocol server provides the DHCP leases file generated in service process, DHCP history after work for dhcp client Lease cache file；When main Dynamic Host Configuration Protocol server is in standby server list, DHCP leases file and the DHCP history lease caching for judging to obtain It, will be standby in updated content synchronization to newest standby server list after at least one in file three changes Use Dynamic Host Configuration Protocol server；After the spare Dynamic Host Configuration Protocol server switching in standby server list is main Dynamic Host Configuration Protocol server, also based on DHCP leases text Part, the work of DHCP history leases cache file.
- 2. the method as described in claim 1, which is characterized in that the main Dynamic Host Configuration Protocol server collaboration standby server obtains spare Server list, including：Main Dynamic Host Configuration Protocol server fixed time broadcast heartbeat packet；The spare Dynamic Host Configuration Protocol server for receiving the heartbeat packet of main Dynamic Host Configuration Protocol server broadcast returns to unicast heartbeat to main Dynamic Host Configuration Protocol server Packet；If main Dynamic Host Configuration Protocol server receives the unicast heartbeat packet returned from spare Dynamic Host Configuration Protocol server, by the spare DHCP service Device is stored into standby server list；If main DHCP is returned in preset time without receiving to come to spare Dynamic Host Configuration Protocol server existing in standby server list The unicast heartbeat packet returned, then delete corresponding spare Dynamic Host Configuration Protocol server from the standby server list.
- 3. the method as described in claim 1, which is characterized in that the spare Dynamic Host Configuration Protocol server switching is main Dynamic Host Configuration Protocol server Afterwards, it further includes：The virtual ip address that the main Dynamic Host Configuration Protocol server before the binding switching of main Dynamic Host Configuration Protocol server after switching uses.
- 4. method as claimed in claim 2, which is characterized in that the method further includes：If main Dynamic Host Configuration Protocol server does not work, spare Dynamic Host Configuration Protocol server foundation includes the available server list of own IP address, and Broadcast heartbeat packet；The standby server is received after the heartbeat packet that other standby servers are broadcasted, to broadcast the heartbeat packet it is spare Server returns to unicast heartbeat packet；If standby server receives the unicast heartbeat packet returned from other spare Dynamic Host Configuration Protocol server, by this other it is spare Dynamic Host Configuration Protocol server is stored into the available server list；Spare Dynamic Host Configuration Protocol server judges itself in the corresponding spare Dynamic Host Configuration Protocol server of available server list lookup minimum IP address Whether it is the spare Dynamic Host Configuration Protocol server, if it is, being main Dynamic Host Configuration Protocol server by itself switching；If standby server switching for main Dynamic Host Configuration Protocol server fail, then by available server list in addition to the standby server Standby server available server list lookup minimum the corresponding standby server of IP address, until the spare clothes that find Device successful switch be engaged in as main Dynamic Host Configuration Protocol server；After the heartbeat packet for receiving main Dynamic Host Configuration Protocol server fixed time broadcast, spare Dynamic Host Configuration Protocol server is gone off the air heartbeat packet, to the master Dynamic Host Configuration Protocol server returns to unicast heartbeat packet.
- 5. a kind of Dynamic Host Configuration Protocol server redundant system, which is characterized in that taken the system comprises main Dynamic Host Configuration Protocol server and with main DHCP Business device shares the spare Dynamic Host Configuration Protocol server in IP address pond, wherein,The main Dynamic Host Configuration Protocol server, for spare Dynamic Host Configuration Protocol server after it starts and works, to be cooperateed with to obtain standby server row Table；By the spare Dynamic Host Configuration Protocol server in the standby server list synchronization of acquisition to the standby server list；The spare Dynamic Host Configuration Protocol server, for main Dynamic Host Configuration Protocol server to be cooperateed with to obtain standby server list；Receive main DHCP service The standby server list that device is sent；And after main Dynamic Host Configuration Protocol server breaks down, by spare in standby server list Dynamic Host Configuration Protocol server switches over judgement, when meeting switching condition, switches and continues for main Dynamic Host Configuration Protocol server based on the IP address Pond works, wherein,The spare Dynamic Host Configuration Protocol server, for after judging that main Dynamic Host Configuration Protocol server breaks down, by receiving the spare clothes Be engaged in device list spare Dynamic Host Configuration Protocol server in the corresponding standby server of standby server list lookup minimum IP address, judge from Whether body is the standby server, if it is, being main Dynamic Host Configuration Protocol server by itself switching；And judging standby server Switch when failing for main Dynamic Host Configuration Protocol server, continued by the standby server in standby server list in addition to the standby server In the corresponding standby server of IP address of standby server list lookup minimum, until the standby server successful switch found Be in main Dynamic Host Configuration Protocol server or standby server list without for lookup standby server；The main Dynamic Host Configuration Protocol server is additionally operable to after work provide generation DHCP leases letter in service process for dhcp client Breath, DHCP history lease cache files；And it is gone through in standby server list, DHCP leases information and the DHCP for judging to obtain After at least one in history lease cache file three changes, by updated content synchronization to newest standby server Spare Dynamic Host Configuration Protocol server in list；Spare Dynamic Host Configuration Protocol server in the standby server list is additionally operable to switching as after main Dynamic Host Configuration Protocol server, based on DHCP Lease file and the work of DHCP history leases cache file.
- 6. system as claimed in claim 5, which is characterized in that main Dynamic Host Configuration Protocol server cooperates with acquisition standby with spare Dynamic Host Configuration Protocol server With server list, including：Main Dynamic Host Configuration Protocol server, for fixed time broadcast heartbeat packet；Receive the unicast heartbeat packet returned from spare Dynamic Host Configuration Protocol server Afterwards, which is stored into standby server list；If it is not received by preset time from spare clothes Be engaged in the unicast heartbeat packet that existing spare Dynamic Host Configuration Protocol server returns in device list, then by for spare Dynamic Host Configuration Protocol server from described It is deleted in standby server list；Spare Dynamic Host Configuration Protocol server after receiving the heartbeat packet of main Dynamic Host Configuration Protocol server broadcast, returns single to main Dynamic Host Configuration Protocol server Broadcast heartbeat packet.
- 7. system as claimed in claim 5, which is characterized in thatThe standby server is additionally operable to itself switching after main Dynamic Host Configuration Protocol server, to bind the main Dynamic Host Configuration Protocol server before switching The virtual ip address used.
- 8. system as claimed in claim 6, which is characterized in thatThe spare Dynamic Host Configuration Protocol server is additionally operable to after judging that main Dynamic Host Configuration Protocol server does not work, and is established comprising own IP address Available server list, and broadcast heartbeat packet；It receives after the heartbeat packet that other standby servers are broadcasted, it should to broadcast The standby server of heartbeat packet returns to unicast heartbeat packet；If receive the unicast heartbeat returned from other spare Dynamic Host Configuration Protocol server Packet, then store other spare Dynamic Host Configuration Protocol server into the available server list；In available server list lookup minimum The corresponding spare Dynamic Host Configuration Protocol server of IP address, judges whether itself is the spare Dynamic Host Configuration Protocol server, if it is, itself is switched For main Dynamic Host Configuration Protocol server；And after judging standby server switching for the failure of main Dynamic Host Configuration Protocol server, then by available server Standby server in list in addition to the standby server is corresponding standby in the IP address of available server list lookup minimum With server, until the standby server successful switch found is main Dynamic Host Configuration Protocol server；It is wide to receive main Dynamic Host Configuration Protocol server timing After the heartbeat packet broadcast, spare Dynamic Host Configuration Protocol server is gone off the air heartbeat packet, and unicast heartbeat packet is returned to the main Dynamic Host Configuration Protocol server.
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| CN105007233B (en) * | 2015-07-13 | 2018-02-27 | 互联网域名系统北京市工程研究中心有限公司 | A kind of method that distribution address is loaded based on Dynamic Host Configuration Protocol server cluster |
| CN107291580A (en) * | 2017-05-04 | 2017-10-24 | 复旦大学 | MATLAB software system and method |
| CN107995327B (en) * | 2017-12-22 | 2020-07-28 | 盛科网络（苏州）有限公司 | Method for sharing information between DHCP servers in real time based on DHCP message |
| CN110365930B (en) * | 2018-04-11 | 2021-07-30 | 视联动力信息技术股份有限公司 | Data processing method and device |
| CN109507866A (en) * | 2018-12-07 | 2019-03-22 | 天津津航计算技术研究所 | A kind of double-machine redundancy system and method based on network address drift technology |
| CN112769600B (en) * | 2020-12-29 | 2022-08-30 | 新华三技术有限公司 | DHCP escape method, device, equipment and machine readable storage medium |
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