CN108600069A - Link switch-over method and device - Google Patents
Link switch-over method and device Download PDFInfo
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- CN108600069A CN108600069A CN201810271135.XA CN201810271135A CN108600069A CN 108600069 A CN108600069 A CN 108600069A CN 201810271135 A CN201810271135 A CN 201810271135A CN 108600069 A CN108600069 A CN 108600069A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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- Computer Networks & Wireless Communication (AREA)
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- Computer Security & Cryptography (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
This disclosure relates to a kind of link switch-over method and device, including：Receive from the first master is specified turn the first notification message for purpose virtual machine of originator DF equipment after, spare specify is turned originator DF equipment and is determined as the second main DF equipment；Wherein, the described first main DF equipment and the spare DF equipment are the network equipment in the same multi-home networking that purpose virtual machine accesses；When receiving the data message forwarded to the purpose virtual machine, pass through data message described in the described second main DF device forwards；Wherein, first notification message is offline for characterizing the described first main DF equipment.According to a kind of link switch-over method and device of the embodiment of the present disclosure, it can avoid the problem that the offline data message in the period for electing new main DF equipment of main DF equipment is lost.
Description
Technical field
This disclosure relates to field of communication technology more particularly to a kind of link switch-over method and device.
Background technology
EVPN (Ethernet Virtual Private Network, ether Virtual Private Network) is a kind of two-layer VPN skill
Art.In order to improve the reliability of access side, agreement defines EVPN and belongs to access net more, to improve business datum message can
By property.In the access net of ownership more than EVPN, a VM (Virtual Machine, empty machine) can simultaneously be connect by multilink
Enter different VTEP (VXLAN Tunnel End Point, expansible Virtual Local Area Network endpoint of a tunnel) equipment.VM is accessed not
Multilink with VTEP equipment forms an ES (Ethernet Segment, ethernet segment).ESI(Ethernet
Segment Identifier, ethernet segment mark) it can be used for identifying an ES.
A corresponding VM accesses different VTEP equipment, in order to allow BUM (Broadcast, Unknown Unicast or
Multicast, broadcast, unknown unicast, multicast) flow the problem of loop and more parts are not present, multiple VTEP equipment can be from full
A DF is elected in the VTEP equipment of the identical ESI values of foot, is responsible for forwarding from VM and being sent to the message of VM by the DF.
Invention content
In view of this, the present disclosure proposes a kind of link switch-over method and device, it is offline to election to avoid main DF equipment
The problem of data message gone out in the period of new main DF equipment is lost.
According to the one side of the disclosure, a kind of link switch-over method is provided, expansible Virtual Local Area Network tunnel is applied to
Road endpoint VTEP, the method includes：
Receive from the first master is specified turn the first notification message for purpose virtual machine of originator DF equipment after, will be standby
Turned originator DF equipment with specified and be determined as the second main DF equipment；Wherein, the described first main DF equipment and the spare DF equipment are
The network equipment in the same multi-home networking of purpose virtual machine access；
When receiving the data message forwarded to the purpose virtual machine, described in the described second main DF device forwards
Data message；
Wherein, first notification message is offline for characterizing the described first main DF equipment.
According to another aspect of the present disclosure, a kind of link switching device is provided, expansible Virtual Local Area Network is applied to
Endpoint of a tunnel VTEP, described device include：
First determining module, for receive from the first master it is specified turn originator DF equipment for the of purpose virtual machine
After one notification message, specified turn originator DF equipment by spare and be determined as the second main DF equipment；Wherein, the described first main DF equipment and
The spare DF equipment is the network equipment in the same multi-home networking of purpose virtual machine access；
First forwarding module, for when receiving the data message forwarded to the purpose virtual machine, passing through described
Data message described in two main DF device forwards；
Wherein, first notification message is offline for characterizing the described first main DF equipment.
So, VTEP is true by spare DF equipment after receiving the first notification message from the first main DF equipment
It is set to the second main DF equipment, with when receiving the data message forwarded to purpose virtual machine, by the second main DF equipment to mesh
Virtual machine forward above-mentioned data message.According to the link switch-over method and device of the embodiment of the present disclosure, can not pass through
It is virtual to purpose by spare DF equipment (the second main DF equipment) when first main DF equipment is to purpose virtual machine forwarding data packets
Machine forwarding data packets, to reduce the offline data message in the period for electing the second main DF equipment of the first main DF equipment
Loss.
According to below with reference to the accompanying drawings to detailed description of illustrative embodiments, the other feature and aspect of the disclosure will become
It is clear.
Description of the drawings
Including in the description and the attached drawing of a part for constitution instruction and specification together illustrate the disclosure
Exemplary embodiment, feature and aspect, and for explaining the principles of this disclosure.
Fig. 1 shows a kind of schematic diagram of multi-home networking according to one embodiment of the disclosure；
Fig. 2 shows the flow charts according to the link switch-over method of one embodiment of the disclosure；
Fig. 3 shows the flow chart of the link switch-over method according to one embodiment of the disclosure；
Fig. 4 shows to obtain the flow chart of the method for spare DF equipment according to one embodiment of the disclosure；
Fig. 5 shows the flow chart according to one illustrative link switch-over method of the disclosure；
Fig. 6 shows to obtain the flow chart of the method for spare DF equipment according to one embodiment of the disclosure；
Fig. 7 shows the flow chart according to one illustrative link switch-over method of the disclosure；
Fig. 8 shows the flow chart according to one illustrative link switch-over method of the disclosure；
Fig. 9 shows the flow chart according to one illustrative link switch-over method of the disclosure；
Figure 10 shows the flow chart of the link switch-over method according to one embodiment of the disclosure；
Figure 11 shows the structure diagram of the link switching device according to one embodiment of the disclosure；
Figure 12 shows the structure diagram of the link switching device according to one embodiment of the disclosure；
Figure 13 is a kind of hardware block diagram of link switching device shown according to an exemplary embodiment.
Specific implementation mode
Various exemplary embodiments, feature and the aspect of the disclosure are described in detail below with reference to attached drawing.It is identical in attached drawing
Reference numeral indicate functionally the same or similar element.Although the various aspects of embodiment are shown in the accompanying drawings, remove
It non-specifically points out, it is not necessary to attached drawing drawn to scale.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, in order to better illustrate the disclosure, numerous details is given in specific implementation mode below.
It will be appreciated by those skilled in the art that without certain details, the disclosure can equally be implemented.In some instances, for
Method, means, element and circuit well known to those skilled in the art are not described in detail, in order to highlight the purport of the disclosure.
Fig. 1 shows a kind of schematic diagram of multi-home networking according to one embodiment of the disclosure.VTEP1, VTEP2, VTEP3 and
VTEP4 indicates VTEP equipment；VM1 and VM2 indicates VM (Virtual Machine, virtual machine)；LSW1 indicates interchanger.VM1 is logical
Cross an interchanger LSW1 and belong to 3 VTEP equipment of access more, respectively VTEP1, VTEP2 and VTEP3, and VTEP1,
Dynamic access point is created above in VTEP2 and VTEP3, configures identical ethernet segment mark ESI values.
VTEP1 (IP address 1.1.1.1) to opposite end VTEP2, VTEP3 and VTEP4 send ES (Ethernet Segment,
Ethernet segment) routing, ES routings carry VNI values and ESI values, VTEP2 (IP address 2.2.2.2) to opposite end VTEP1 and VTEP3
ES routings are sent, ES routings carry VNI values and ESI values and VTEP3 (IP address 3.3.3.3) to opposite end VTEP1 and VTEP2
ES routings are sent, ES routings carry VNI values and ESI values；Above-mentioned VTEP1, VTEP2 and VTEP3 can form a DF election row
Table, as shown in table 1 below.
Table 1
| ESI | VTEP IP address |
| 1 | 1.1.1.1 |
| 1 | 2.2.2.2 |
| 1 | 3.3.3.3 |
It elects one from 3 VTEP according to election regulation and specifies and turn originator DF equipment, after VM1 reaches the standard grade, can send and exempt from
Take ARP messages to three VTEP, but 3 of the VM1 of 3 VTEP are accessed AC mouthfuls, only 1 AC mouthfuls are DF mouthfuls, 2 other
AC mouthfuls are non-DF mouthfuls.Assuming that above-mentioned VTEP1 is the DF equipment elected, then the AC mouths of VTEP1 are DF mouthfuls.It is come from when receiving
When the gratuitous ARP packet of VM1, VTEP2 and VTEP3 can directly abandon the gratuitous ARP packet, and VTEP1 receives the gratuitous ARP, and
The forwarding-table item of VM1 is generated on VTEP.The forwarding-table item of the VM1 learnt can be synchronized to opposite equip. by VTEP1
VTEP4, when VM2 sends datagram to VM1, VTEP4 can be by VTEP1 by data message forwarding to VM1.
But when if the interaction of data message can not be carried out between VM1 and VTEP1 due to link failure etc., VTEP1
The route withdraw that can be sent to opposite end VTEP equipment VTEP2, VTEP3 and VTEP4 for VM1 indicates that VTEP4 can be in response to
Above-mentioned route withdraw instruction, forwarding-table item synchronous with VTEP1 revocation DF equipment VTEP1.VTEP2 and VTEP3 is redefined newly
DF equipment, detailed process is as described above.Likewise, new DF equipment can synchronize the forwarding-table item of VM1 to VTEP4.But
During VTEP2 and VTEP3 redefines new DF equipment, if VTEP4 receives the data message that VM2 is forwarded to VM1, due to this
When there is no DF equipment, data message can be caused to lose.
In order to solve the above-mentioned technical problem, present disclose provides a kind of link switch-over methods.
Fig. 2 shows the flow chart according to the link switch-over method of one embodiment of the disclosure, this method can be applied to expand
It opens up in Virtual Local Area Network endpoint of a tunnel VTEP.As shown in Fig. 2, this method may include：
Step 201 disappears in reception from specified the first notice for purpose virtual machine for turning originator DF equipment of the first master
After breath, specified turn originator DF equipment by spare and be determined as the second main DF equipment；Wherein, the described first main DF equipment and described spare
DF equipment is the network equipment in the same multi-home networking of purpose virtual machine access, and first notification message is for characterizing institute
It is offline to state the first main DF equipment.
When above-mentioned first notification message is the link failure between the first main DF equipment and purpose virtual machine, to purpose void
What quasi- machine was sent is used to characterize the offline notification message of the first main DF equipment.For example, above-mentioned first notification message can be
The route withdraw for purpose virtual machine that first main DF equipment is sent indicates.Between the first main DF equipment and purpose virtual machine
Link failure when, which can not receive the data message of purpose virtual machine, also without normal direction purpose virtual machine turn
Send out data message.
After VTEP receives first notification message, determination can not forward data by the first main DF equipment to purpose virtual machine
Message.VTEP determines spare DF equipment, and sets the spare DF equipment to the second main DF equipment.
Wherein, above-mentioned spare DF equipment can be that the opposite end VTEP of VTEP is set by the spare DF for electing routing to be elected
Standby, which is sent to VTEP by main DF equipment, and VTEP receives the spare DF equipment and is stored in local.On alternatively,
It can be that after VTEP equipment receives the DF election routings from multiple opposite end VTEP, phase is used with opposite end VTEP to state spare DF equipment
Same election regulation, the spare DF equipment determined from multiple opposite end VTEP.
Fig. 3 shows the flow chart of the link switch-over method according to one embodiment of the disclosure.
In one possible implementation, above-mentioned specified to turn originator DF equipment by spare and be determined as the second master with reference to Fig. 3
DF equipment, may comprise steps of：
Step 2011 cancels the first main DF equipment according to first notification message；For example, the first main DF is set
Standby that the forwarding-table item for purpose virtual machine can be synchronized to VTEP after completing to elect, which includes the first master
The IP address of DF equipment and the addresses IP/MAC of purpose virtual machine.Due to link between purpose virtual machine and the first main DF equipment
When failure and other reasons can not carry out the interaction of data message, the first main DF equipment sends the first notification message to opposite end VTEP, should
The IP address of the first main DF equipment can be carried in first notification message.It, can be with after VTEP receives above-mentioned first notification message
Cancel the IP address of the first main DF equipment in forwarding-table item.
Step 2022 obtains spare DF equipment；
After VTEP receives the first notification message from the first main DF equipment, VTEP can obtain local deposit from by inquiring
The spare DF equipment of storage, or spare DF equipment is determined from the election list being locally stored according to election regulation.
The spare DF equipment is determined as the second main DF equipment by step 2023.
After determining spare DF equipment, VTEP can will be directed to the first main DF in the forwarding-table item of purpose virtual machine on VTEP
The IP address of equipment is updated to the IP address of spare DF equipment, it is possible thereby to which spare DF equipment is determined as the second main DF equipment.
Step 202, when receiving the data message forwarded to the purpose virtual machine, pass through the described second main DF equipment
Forward the data message.
VTEP can pass through the second main DF equipment (spare DF when receiving the data message forwarded to purpose virtual machine
Equipment) to purpose virtual machine forwarding data packets.
In one example, as described above, after spare DF equipment is determined as the second main DF equipment, mesh is directed on VTEP
Virtual machine forwarding-table item in the IP address of the first main DF equipment be updated to the IP address (namely of spare DF equipment
The IP address of two main DF equipment), VTEP can be according to the IP address of the in forwarding-table item second main DF equipment to the second main DF equipment
Forwarding data packets.
So, data can not be carried out due to link failure etc. between purpose virtual machine and the first main DF equipment
When the interaction of message, the first main DF equipment-purpose void can be route to the chain of purpose virtual machine forwarding data packets by original
Quasi- machine-cut is changed to spare DF equipment-purpose virtual machine, so that after spare DF equipment receives data message, which is turned
It is sent to purpose virtual machine.
Illustratively, referring to Fig.1, VM1 is purpose virtual machine, and VM2 is source virtual machine, and VTEP1 is the first main DF equipment,
VTEP2 is spare DF equipment.When the interaction of data message can not be carried out due to link failure etc. between VM1 and VTEP1,
VTEP1 can send the first notification message (for example, for the routing of VM1 to opposite end VTEP equipment VTEP2, VTEP3 and VTEP4
Revocation instruction).After VTEP4 receives first notification message, spare DF equipment VTEP2 is determined as the second main DF equipment, for example,
The IP address that the first main DF equipment (VTEP1) in the forwarding-table item of VM1 is directed on VTEP4 can be updated to spare DF by VTEP4
The IP address of equipment (VTEP2).VTEP4, can be by VTEP2 by data when receiving the data message that VM2 is forwarded to VM1
Message is forwarded to VM1.
So, VTEP is true by spare DF equipment after receiving the first notification message from the first main DF equipment
It is set to the second main DF equipment, with when receiving the data message forwarded to purpose virtual machine, by the second main DF equipment to mesh
Virtual machine forward above-mentioned data message.According to the link switch-over method of the embodiment of the present disclosure, the first master can not passed through
When DF equipment is to purpose virtual machine forwarding data packets, forwarded to purpose virtual machine by spare DF equipment (the second main DF equipment)
Data message, to reduce losing for the offline data message in the period for electing the second main DF equipment of the first main DF equipment
It loses.
Fig. 4 shows to obtain the flow chart of the method for spare DF equipment according to one embodiment of the disclosure.
In one possible implementation, with reference to Fig. 4, the method for the above-mentioned spare DF equipment of acquisition may include：
Step 401 receives the second notification message that the first main DF equipment is sent；Wherein, it is taken in the second notification message
Identification information with the spare DF equipment.
Above-mentioned second notification message informs the current first main DF equipment of VTEP side for what the first main DF equipment was sent to VTEP
The message of the spare DF equipment elected, can be with the identification information of carrying about standby DF equipment in the second logical message.For example,
Above-mentioned second notification message can be that the first ES is route, and the identification information of above-mentioned spare DF equipment can be the IP of spare DF equipment
Address.
Step 402 obtains spare DF equipment according to the second notification message.
VTEP can obtain spare DF equipment from second notification message.
Fig. 5 shows the flow chart according to one illustrative link switch-over method of the disclosure, wherein step 502 and step 503
Similar with step 201 in above-described embodiment and step 202, details are not described herein for the disclosure.
In the case that step 501, the first ES noticed in the first main DF equipment of reception are route, it is route according to the first ES
Obtain spare DF equipment.
Multiple VTEP equipment of the opposite ends VTEP can elect two VTEP equipment according to election regulation from multiple VTEP,
Respectively as the first main DF equipment and spare DF equipment.For example, multiple VTEP equipment of the opposite ends VTEP are according to election regulation
Two VTEP equipment can be elected simultaneously as the first main DF equipment and spare DF equipment, or can elect two successively
VTEP equipment is as the first main DF equipment and spare DF equipment.After the election for completing spare DF equipment, the first main DF equipment to
The VTEP equipment of opposite end sends the first ES routings, can be illustrated with the identification information of carrying about standby DF equipment in the first ES routings
For, it can be with the IP address of carrying about standby DF equipment in above-mentioned first ES routings.VTEP receive that the first main DF equipment sends the
After one ES routings, the spare DF equipment carried in the first ES routings can be obtained from the first ES routings.
Step 502 refers in reception from the specified route withdraw for purpose virtual machine for turning originator DF equipment of the first master
After showing, specified turn originator DF equipment by spare and be determined as the second main DF equipment；Wherein, the described first main DF equipment and described spare
DF equipment is the network equipment in the same multi-home networking of purpose virtual machine access.
Step 503, when receiving the data message forwarded to the purpose virtual machine, pass through the described second main DF equipment
Forward the data message.
Illustratively, still by taking Fig. 1 as an example.VM1 belongs to access VTEP1, VTEP2 and VTEP3 more, and can be
Dynamic access point is created on VTEP1, VTEP2 and VTEP3, and configures phase for the access point of above-mentioned VTEP1, VTEP2 and VTEP3
Same ethernet segment identifies ESI values.Wherein, the IP address of VTEP1 is：1.1.1.1, the ESI values of access point are configured to 1, VTEP2
IP address be：2.2.2.2, the IP address that the ESI values of access point are configured to 1, VTEP3 is：3.3.3.3 the ESI values of access point
It is configured to 1.
VTEP1, VTEP2 and VTEP3 send mutually ES routings, including：VTEP1 sends the roads ES to VTEP2 and VTEP3
By VNI (VXLAN ID) value 100, ESI values 1 can be carried in ES routings；VTEP2 sends ES routings to VTEP1 and VTEP3,
VNI values 100, ESI values 1 can be carried in ES routings；VTEP3 sends ES routings to VTEP1 and VTEP2, can in ES routings
To carry VNI values 100, ESI values 1.
VTEP1, VTEP2 and VTEP3 can be elected according to above-mentioned DF route one DF election list of each self-generating, reference
Table 1.
VTEP1, VTEP2, VTEP3 can carry out the first main DF equipment and spare DF equipment according to identical election regulation
Election, such as：In the VTEP equipment with identical VNI and ESI values, select the VTEP of IP address minimum for the first main DF equipment
(determining that VTEP1 is the first main DF equipment), and IP is selected in the VTEP (VTEP2 and VTEP3) in addition to the first main DF equipment
The VTEP of address minimum is spare DF equipment (determining that VTEP2 is spare DF equipment).
After the completion of the first main DF equipment and spare DF equipment are elected, the first main DF equipment VTEP1 sends first to VTEP4
ES is route, and may include the identification information of spare DF equipment in the first ES routings.It, can after VTEP4 receives the first ES routings
To obtain spare DF equipment from the first ES routings.
When can not carry out the interaction of data message due to link failure etc. between VM1 and VTEP1, VTEP1 can be with
Route withdraw instruction is sent to VTEP4.After VTEP4 receives route withdraw instruction, spare DF equipment VTEP2 is determined as second
Main DF equipment, for example, VTEP4 can be by the IP address of the first main DF equipment in forwarding-table item by VTEP1 (1.1.1.1)
It is revised as the address VTEP2 (2.2.2.2) of the second main DF equipment, so, the data that VTEP4 is forwarded in reception VM2 to VM1
It, can be by VTEP2 to VM1 forwarding data packets when message.
Fig. 6 shows to obtain the flow chart of the method for spare DF equipment according to one embodiment of the disclosure.
In one possible implementation, with reference to Fig. 6, the method for the above-mentioned spare DF equipment of acquisition may include：
Step 601 receives the third notice message sent from multiple opposite end VTEP；Wherein, each third is logical
Know the identification information that the VTEP for sending the third notice message is carried in message；
Above-mentioned third notice message can be to participate in carrying opposite end VTEP that the opposite end VTEP of DF elections is sent (to send the
Three notice VTEP) identification information message.For example, above-mentioned third notice message can be that the second ES is route, above-mentioned
The identification information of opposite end VTEP can be the IP address of opposite end VTEP.
Step 602, according to election regulation and the identification information for carrying the VTEP for sending the third notice message
The spare DF equipment is determined from multiple opposite end VTEP.
It, can be according to multiple third notices of reception after VTEP receives the third notice message that multiple opposite end VTEP are sent
The identification information of the VTEP of the transmission third notice message carried in message determines the multiple opposite end VTEP for participating in DF elections, and can
To determine spare DF equipment from above-mentioned multiple opposite end VTEP according to election regulation.
So, VTEP can be advised after the first notification message for receiving the first main DF equipment of characterization according to election
Spare DF equipment is then determined from multiple opposite end VTEP, and spare DF equipment is determined as the second main DF equipment, can connect
When receiving the data message forwarded to purpose virtual machine, pass through data message described in the second main DF device forwards.Fig. 7 shows basis
The flow chart of one illustrative link switch-over method of the disclosure, wherein step 702 and step 703 are the same as step in above-described embodiment
201 and step 202 it is similar, details are not described herein for the disclosure.
Step 701, in the case where receiving from the 2nd ES that multiple opposite end VTEP are sent routing, according to election regulation
The first main DF equipment and spare DF equipment are determined from multiple opposite end VTEP.
Multiple opposite end VTEP of VTEP can also send the 2nd ES routings when sending the 2nd ES routings to the VTEP, the
The ESI and IP address of VTEP can be carried in two ES routings.So, VTEP can obtain that multiple opposite end VTEP send the
Two ES are route, and the first main DF equipment and spare is elected from multiple opposite end VTEP using election regulation identical with opposite end VTEP
DF equipment, for example, VTEP can elect two VTEP equipment simultaneously from multiple opposite end VTEP according to election regulation and make
For the first main DF equipment and spare DF equipment, or two VTEP equipment can be elected successively as the first main DF equipment and standby
With DF equipment.
Step 702 refers in reception from the specified route withdraw for purpose virtual machine for turning originator DF equipment of the first master
After showing, specified turn originator DF equipment by spare and be determined as the second main DF equipment；Wherein, the described first main DF equipment and described spare
DF equipment is the network equipment in the same multi-home networking of purpose virtual machine access.
Step 703, when receiving the data message forwarded to the purpose virtual machine, pass through the described second main DF equipment
Forward the data message.
Illustratively, still by taking Fig. 1 as an example.VM1 belongs to access VTEP1, VTEP2 and VTEP3 more, and can be
Dynamic access point is created on VTEP1, VTEP2 and VTEP3, and configures phase for the access point of above-mentioned VTEP1, VTEP2 and VTEP3
Same ethernet segment identifies ESI values.Wherein, the IP address of VTEP1 is：1.1.1.1, the ESI values of access point are configured to 1, VTEP2
IP address be：2.2.2.2, the IP address that the ESI values of access point are configured to 1, VTEP3 is：3.3.3.3 the ESI values of access point
It is configured to 1.
VTEP1, VTEP2 and VTEP3 can send the 2nd ES routings to opposite end VTEP, including：VTEP1 to VTEP2,
VTEP3 and VTEP4 sends the 2nd ES routings；VTEP2 sends the 2nd ES routings to VTEP1VTEP3 and VTEP4；VTEP3 to
VTEP1, VTEP2 and VTEP4 send the 2nd ES routings, and VNI values 100, ESI values 1 can be carried in above-mentioned 2nd ES routings.
VTEP1, VTEP2, VTEP3 and VTEP4 can route one DF of each self-generating according to above-mentioned 2nd ES and elect list,
With reference to table 1.VTEP1, VTEP2, VTEP3 and VTEP4 can carry out the first main DF equipment and spare according to identical election regulation
The election of DF equipment, such as：In the VTEP equipment with identical VNI and ESI values, it is first to select the VTEP of IP address minimum
Main DF equipment (determining that VTEP1 is the first main DF equipment), and in the VTEP (VTEP2 and VTEP3) in addition to the first main DF equipment
It is middle to select the VTEP of IP address minimum for spare DF equipment (determining that VTEP2 is spare DF equipment).First main DF equipment can be to
Opposite end VTEP4 synchronizes the forwarding-table item of VM1, which may include the IP/ of the IP address 1.1.1.1 and VM1 of VTEP1
MAC Address..
When can not carry out the interaction of data message due to link failure etc. between VM1 and VTEP1, VTEP1 can be with
Route withdraw instruction is sent to VTEP4.After VTEP4 receives route withdraw instruction, spare DF equipment VTEP2 is determined as second
Main DF equipment, for example, VTEP4 can be by the IP address 1.1.1.1 modifications of the first main DF equipment VTEP1 in forwarding-table item
For the address 2.2.2.2 of the second main DF equipment VTEP2, so, the data message that VTEP4 is forwarded in reception VM2 to VM1
When, it can be by VTEP2 to VM1 forwarding data packets.
Fig. 8 shows the flow chart according to one illustrative link switch-over method of the disclosure.
Step 801 receives the 2nd ES routings sent from multiple opposite end VTEP；
Step 802 determines the first main DF equipment according to election regulation from multiple opposite end VTEP；
Multiple opposite end VTEP of VTEP can also synchronize the 2nd ES routings when sending the 2nd ES routings to the VTEP.
After VTEP receives the 2nd ES routings that multiple opposite end VTEP are sent, election regulation election identical with opposite end VTEP the may be used
One main DF equipment.
When receiving the data message forwarded to purpose virtual machine, can be turned to purpose virtual machine by the first main DF equipment
Send out data message.
Step 803, after receiving the route table items revocation instruction from the first main DF equipment, according to election regulation from multiple
Spare DF equipment is determined in VTEP in the VTEP of opposite end other than the first main DF equipment.
Step 804 specified turn spare originator DF equipment and is determined as the second main DF equipment.
After VTEP receives the route withdraw instruction that the first main DF equipment is sent, above-mentioned election regulation may be used from addition to the
In multiple opposite end VTEP other than one main DF equipment, spare DF equipment is determined, and the spare DF equipment is determined as the second main DF
Equipment.VTEP, can be by the second main DF equipment to purpose virtual machine when receiving the data message forwarded to purpose virtual machine
Forwarding data packets.
Step 805, when receiving the data message forwarded to the purpose virtual machine, pass through the described second main DF equipment
Forward the data message.
Illustratively, still by taking Fig. 1 as an example.VM1 belongs to access VTEP1, VTEP2 and VTEP3 more, and can be
Dynamic access point is created on VTEP1, VTEP2 and VTEP3, and configures phase for the access point of above-mentioned VTEP1, VTEP2 and VTEP3
Same ethernet segment identifies ESI values.Wherein, the IP address of VTEP1 is：1.1.1.1, the ESI values of access point are configured to 1, VTEP2
IP address be：2.2.2.2, the IP address that the ESI values of access point are configured to 1, VTEP3 is：3.3.3.3 the ESI values of access point
It is configured to 1.
VTEP1, VTEP2 and VTEP3 can send the 2nd ES routings to opposite end VTEP, including：VTEP1 to VTEP2,
VTEP3 and VTEP4 sends the 2nd ES routings；VTEP2 sends the 2nd ES routings to VTEP1VTEP3 and VTEP4；VTEP3 to
VTEP1, VTEP2 and VTEP4 send the 2nd ES routings, and VNI values 100, ESI values 1 can be carried in above-mentioned 2nd ES routings.
VTEP1, VTEP2, VTEP3 and VTEP4 can route one DF of each self-generating according to above-mentioned 2nd ES and elect list,
With reference to table 1.VTEP1, VTEP2 and VTEP3 can carry out the first main DF equipment and spare DF equipment according to identical election regulation
Election, such as：In the VTEP equipment with identical VNI and ESI values, the VTEP of IP address minimum is selected to be set for the first main DF
Standby (determining that VTEP1 is the first main DF equipment), and the selection in the VTEP (VTEP2 and VTEP3) in addition to the first main DF equipment
The VTEP of IP address minimum is spare DF equipment (determining that VTEP2 is spare DF equipment).First main DF equipment can be to opposite end
VTEP4 synchronizes the forwarding-table item of VM1, which may include the IP/MAC of the IP address 1.1.1.1 and VM1 of VTEP1
Location.
VTEP4 can carry out the election of the first main DF equipment according to above-mentioned election regulation, determine that VTEP1 is that the first main DF is set
It is standby.VTEP4, can be according to forwarding-table item, by VTEP1 to VM1 forwarding numbers when receiving the data message that VM2 is forwarded to VM1
According to message.
When can not carry out the interaction of data message due to link failure etc. between VM1 and VTEP1, VTEP1 can be with
Route withdraw instruction is sent to VTEP4.After VTEP4 receives route withdraw instruction, using identical election regulation, remaining
The election that spare DF equipment is carried out in VTEP equipment (VTEP2 and VTEP3) determines that VTEP2 is spare DF equipment.Spare DF is set
Standby VTEP2 is determined as the second main DF equipment, for example, VTEP4 can be by the first main DF equipment VTEP1's in forwarding-table item
IP address is revised as the IP address 2.2.2.2 of the second main DF equipment VTEP2 by 1.1.1.1, and so, VTEP4 is receiving VM2
It, can be by VTEP2 to VM1 forwarding data packets when the data message forwarded to VM1.
Fig. 9 shows the flow chart according to one illustrative link switch-over method of the disclosure, wherein step 901, step 902,
And step 904 is similar with step 801, step 802 and step 804 in above-described embodiment, details are not described herein for the disclosure.
Step 901 receives the 2nd ES routings sent from multiple opposite end VTEP.
Step 902 determines the first main DF equipment according to election regulation from multiple opposite end VTEP.
Step 903, receive from the first main DF equipment route table items revocation instruction after, receive to purpose virtual machine
When the data message of forwarding, determined from the VTEP in multiple opposite end VTEP other than the first main DF equipment according to election regulation
Spare DF equipment.
Step 904 specified turn spare originator DF equipment and is determined as the second main DF equipment.
Multiple opposite end VTEP of VTEP can also send the 2nd ES routings when sending the 2nd ES routings to the VTEP, the
The ESI and IP address of VTEP can be carried in two ES routings.It, can after VTEP receives the 2nd ES routings that multiple opposite end VTEP are sent
To elect the first main DF equipment using election regulation identical with opposite end VTEP.VTEP can learn what the first main DF equipment synchronized
For the forwarding-table item of purpose virtual machine.
When receiving the data message forwarded to purpose virtual machine, can be turned to purpose virtual machine by the first main DF equipment
Send out data message.
After VTEP receives the route withdraw instruction that the first main DF equipment is sent, the first main DF equipment can be cancelled, citing comes
It says, it is unavailable that the first main DF equipment can be identified.After VTEP cancels the first main DF equipment, receives and forwarded to purpose virtual machine
Data message when, above-mentioned election regulation may be used, from multiple opposite end VTEP other than the first main DF equipment determine
Spare DF equipment, and the spare DF equipment is determined as the second main DF equipment, and by the second main DF equipment to purpose virtual machine
Forward above-mentioned data message.
Step 905 passes through data message described in the described second main DF device forwards.
Illustratively, still by taking Fig. 1 as an example.VM1 belongs to access VTEP1, VTEP2 and VTEP3 more, and can be
Dynamic access point is created on VTEP1, VTEP2 and VTEP3, and configures phase for the access point of above-mentioned VTEP1, VTEP2 and VTEP3
Same ethernet segment identifies ESI values.Wherein, the IP address of VTEP1 is：1.1.1.1, the ESI values of access point are configured to 1, VTEP2
IP address be：2.2.2.2, the IP address that the ESI values of access point are configured to 1, VTEP3 is：3.3.3.3 the ESI values of access point
It is configured to 1.
VTEP1, VTEP2 and VTEP3 can send the 2nd ES routings to opposite end VTEP, including：VTEP1 to VTEP2,
VTEP3 and VTEP4 sends the 2nd ES routings；VTEP2 sends the 2nd ES routings to VTEP1VTEP3 and VTEP4；VTEP3 to
VTEP1, VTEP2 and VTEP4 send the 2nd ES routings, and VNI values 100, ESI values 1 can be carried in above-mentioned 2nd ES routings.
VTEP1, VTEP2, VTEP3 and VTEP4 can route one DF of each self-generating according to above-mentioned 2nd ES and elect list,
With reference to table 1.VTEP1, VTEP2 and VTEP3 can carry out the first main DF equipment and spare DF equipment according to identical election regulation
Election, such as：In the VTEP equipment with identical VNI and ESI values, the VTEP of IP address minimum is selected to be set for the first main DF
Standby (determining that VTEP1 is the first main DF equipment), and the selection in the VTEP (VTEP2 and VTEP3) in addition to the first main DF equipment
The VTEP of IP address minimum is spare DF equipment (determining that VTEP2 is spare DF equipment).First main DF equipment can be to opposite end
VTEP4 synchronizes the forwarding-table item of VM1, which may include the IP/MAC of the IP address 1.1.1.1 and VM1 of VTEP1
Location.
VTEP4 can carry out the election of the first main DF equipment according to above-mentioned election regulation, determine that VTEP1 is that the first main DF is set
It is standby.VTEP4, can be according to forwarding-table item, by VTEP1 to VM1 forwarding numbers when receiving the data message that VM2 is forwarded to VM1
According to message.
When can not carry out the interaction of data message due to link failure etc. between VM1 and VTEP1, VTEP1 can be with
Route withdraw instruction is sent to VTEP4.After VTEP4 receives route withdraw instruction, the forwarding-table item (mark of VTEP1 is cancelled
VTEP1 is unavailable).VTEP4 is in the data message for receiving VM2 and being forwarded to VM1, and the first main DF equipment in forwarding-table item
When VTEP1 is unavailable, above-mentioned election regulation may be used, spare DF is carried out in remaining VTEP equipment (VTEP2 and VTEP3)
The election of equipment determines that VTEP2 is spare DF equipment.Spare DF equipment VTEP2 is determined as the second main DF equipment, citing comes
It says, the IP address of the first main DF equipment VTEP1 in forwarding-table item can be revised as the second main DF by 1.1.1.1 and set by VTEP4
The IP address 2.2.2.2 of standby VTEP2, so, VTEP4 can forward above-mentioned data message by VTEP2 to VM1.
Figure 10 shows the flow chart of the link switch-over method according to one embodiment of the disclosure.Wherein, step 1001 and step
1002 is similar with step 102 with above-mentioned steps 101, and details are not described herein for the embodiment of the present disclosure.
In one possible implementation, referring to Fig.1 0, the above method may include：
Step 1001 disappears in reception from specified the first notice for purpose virtual machine for turning originator DF equipment of the first master
After breath, specified turn originator DF equipment by spare and be determined as the second main DF equipment；Wherein, the described first main DF equipment and described spare
DF equipment is the network equipment in the same multi-home networking of purpose virtual machine access；
Step 1002, when receiving the data message forwarded to the purpose virtual machine, set by the described second main DF
It is standby to forward the data message；
Step 1003 receives the 4th notification message from the described first main DF equipment；Wherein, the 4th notification message
The described first main DF equipment is characterized to reach the standard grade.
Above-mentioned 4th notification message can be that the first main DF equipment is reached the standard grade (between the first main DF equipment and purpose virtual machine
After link failure is repaired, the first main DF equipment is reached the standard grade again) after, the notice sent to the opposite end VTEP of the first main DF equipment disappears
Breath.For example, the identification information that the first main DF equipment is reached the standard grade can be carried in the 4th notification message, so that opposite end VTEP
After receiving the 4th notification message, it can determine that the first main DF equipment has been reached the standard grade according to the identification information.
Step 1004 cancels the second main DF equipment according to the 4th notification message, and restores the described first main DF
Equipment；
It for example, can will be in forwarding-table item after VTEP receives the 4th notification message that the first main DF equipment is sent
The IP address of second main DF equipment be substituted for the first main DF equipment IP address (such as：Can be carried in 4th notification message
The IP address of one main DF equipment, VTEP can obtain the IP address of the first main DF equipment from the 4th notification message, alternatively, VTEP
When cancelling the first main DF equipment, can locally record the first main DF equipment IP address, after receiving the 4th notification message,
Can be from the local IP address for obtaining the first main DF equipment), to cancel the second main DF equipment, restore the first main DF equipment.
Step 1005, when receiving the data message forwarded to the purpose virtual machine, set by the described first main DF
It is standby to forward the data message.
So, VTEP can be in the fault recovery of the first main DF equipment to the communication link between purpose virtual machine
Afterwards, the 4th notification message sent according to the first main DF equipment cancels the second main DF equipment, and restores the first main DF equipment,
By source virtual machine between purpose virtual machine communication link set by the corresponding link switchback of the second main DF equipment to the first main DF
Standby corresponding link.
Figure 11 shows the structure diagram of the link switching device according to one embodiment of the disclosure, can be applied to expansible void
Quasi- local area network endpoint of a tunnel VTEP, as shown in figure 11, which may include：
First determining module 1101 can be used for turning the empty for purpose of originator DF equipment from the first master is specified receiving
After first notification message of quasi- machine, specified turn originator DF equipment by spare and be determined as the second main DF equipment；Wherein, first master
The network equipment in DF equipment and the same multi-home networking that the spare DF equipment is the access of purpose virtual machine；
First forwarding module 1102 can be used for when receiving the data message forwarded to the purpose virtual machine, lead to
Cross data message described in the described second main DF device forwards；
Wherein, first notification message is offline for characterizing the described first main DF equipment.
So, VTEP is true by spare DF equipment after receiving the first notification message from the first main DF equipment
It is set to the second main DF equipment, with when receiving the data message forwarded to purpose virtual machine, by the second main DF equipment to mesh
Virtual machine forward above-mentioned data message.According to the link switching device of the embodiment of the present disclosure, the first master can not passed through
When DF equipment is to purpose virtual machine forwarding data packets, forwarded to purpose virtual machine by spare DF equipment (the second main DF equipment)
Data message, to reduce losing for the offline data message in the period for electing the second main DF equipment of the first main DF equipment
It loses.
Figure 12 shows the structure diagram of the link switching device according to one embodiment of the disclosure.
In one possible implementation, referring to Fig.1 2, above-mentioned first determining module 1101 may include：
Submodule 11011 is cancelled, can be used for cancelling the first main DF equipment according to first notification message；
First acquisition submodule 11012 can be used for obtaining spare DF equipment；
First determination sub-module 11013 can be used for the spare DF equipment being determined as the second main DF equipment.
In one possible implementation, referring to Fig.1 2, described device can also include the first acquisition module 1103, institute
Stating the first acquisition module 1103 may include：
First receiving submodule 11031 can be used for receiving the second notification message that the first main DF equipment is sent；
Second acquisition submodule 11032 can be used for obtaining spare DF equipment according to the second notification message；Wherein,
The identification information of the spare DF equipment is carried in the second notification message.
In one possible implementation, referring to Fig.1 2, described device can also include the second acquisition module 1104, institute
Stating the second acquisition module 1104 may include：
Second receiving submodule 11041 can be used for receiving the third notice message sent from multiple opposite end VTEP；
Wherein, the identification information for the VTEP for sending the third notice message is carried in each third notice message；
Second determination sub-module 11042 can be used for sending the third notice according to election regulation and the carrying
The identification information of the VTEP of message determines the spare DF equipment from multiple opposite end VTEP.
In one possible implementation, referring to Fig.1 2, described device can also include：
Receiving module 1105 can be used for receiving the 4th notification message from the described first main DF equipment；
Recovery module 1106 can cancel the second main DF equipment according to the 4th notification message, and described in recovery
First main DF equipment；
Second forwarding module 1107 can be used for when receiving the data message forwarded to the purpose virtual machine, lead to
Cross data message described in the described first main DF device forwards；
Wherein, the 4th notice message table levies the first main DF equipment and reaches the standard grade.
Figure 13 is a kind of hardware block diagram of link switching device shown according to an exemplary embodiment.Actually answering
In, which can be realized by server.Referring to Fig.1 3, the device 1400 may include processor 1401, be stored with machine can
The machine readable storage medium 1402 executed instruction.Processor 1401 can be via system bus with machine readable storage medium 1402
1403 communications.Also, processor 1401 passes through corresponding with link switch-over method logic in read machine readable storage medium storing program for executing 1402
Machine-executable instruction to execute link switch-over method described above.
Machine readable storage medium 1402 referred to herein can be that any electronics, magnetism, optics or other physics are deposited
Storage device can include or store information, such as executable instruction, data, etc..For example, machine readable storage medium can be：
Random access memory (English：Radom Access Memory, referred to as：RAM), volatile memory, nonvolatile memory,
Flash memory, memory driver (such as hard disk drive), solid state disk, any kind of storage dish (such as CD, dvd) or class
As storage medium or combination thereof.The presently disclosed embodiments is described above, above description is exemplary
, and non-exclusive, and it is also not necessarily limited to disclosed each embodiment.Without departing from illustrated each embodiment range and
In the case of spirit, many modifications and changes will be apparent from for those skilled in the art.This
The selection of term used herein, it is intended to best explain the principle, practical application or the skill to the technology in market of each embodiment
Art is improved, or other those of ordinary skill of the art is enable to understand each embodiment disclosed herein.
Claims (10)
1. a kind of link switch-over method, which is characterized in that be applied to expansible Virtual Local Area Network endpoint of a tunnel VTEP, the side
Method includes：
Receive from the first master is specified turn the first notification message for purpose virtual machine of originator DF equipment after, by spare finger
Surely turn originator DF equipment and be determined as the second main DF equipment；Wherein, for the purpose of the described first main DF equipment and the spare DF equipment
The network equipment in the same multi-home networking of virtual machine access；
When receiving the data message forwarded to the purpose virtual machine, pass through data described in the described second main DF device forwards
Message；
Wherein, first notification message is offline for characterizing the described first main DF equipment.
2. according to the method described in claim 1, it is characterized in that, described specified turn spare originator DF equipment and be determined as second
Main DF equipment, including：
The first main DF equipment is cancelled according to first notification message；
Obtain spare DF equipment；
The spare DF equipment is determined as the second main DF equipment.
3. according to any method of claims 1 or 2, which is characterized in that the method for obtaining the spare DF equipment includes：
Receive the second notification message that the first main DF equipment is sent；
Spare DF equipment is obtained according to the second notification message；Wherein, the spare DF is carried in the second notification message
The identification information of equipment.
4. according to any method of claims 1 or 2, which is characterized in that the method for obtaining the spare DF equipment includes：
Receive the third notice message sent from multiple opposite end VTEP；Wherein, it is carried in each third notice message
Send the identification information of the VTEP of the third notice message；
According to election regulation and the identification information for carrying the VTEP for sending the third notice message from multiple opposite ends
The spare DF equipment is determined in VTEP.
5. according to the method described in claim 1, it is characterized in that, the method further includes：
Receive the 4th notification message from the described first main DF equipment；
The second main DF equipment is cancelled according to the 4th notification message, and restores the described first main DF equipment；
When receiving the data message forwarded to the purpose virtual machine, pass through data described in the described first main DF device forwards
Message；
Wherein, the 4th notice message table levies the first main DF equipment and reaches the standard grade.
6. a kind of link switching device, which is characterized in that be applied to expansible Virtual Local Area Network endpoint of a tunnel VTEP, the dress
Set including：
First determining module turns leading to for the first of purpose virtual machine for originator DF equipment for being specified from the first master in reception
After knowing message, specified turn originator DF equipment by spare and be determined as the second main DF equipment；Wherein, the described first main DF equipment and described
Spare DF equipment is the network equipment in the same multi-home networking of purpose virtual machine access；
First forwarding module, for when receiving the data message forwarded to the purpose virtual machine, being led by described second
Data message described in DF device forwards；
Wherein, first notification message is offline for characterizing the described first main DF equipment.
7. device according to claim 6, which is characterized in that first determining module, including：
Submodule is cancelled, for cancelling the first main DF equipment according to first notification message；
First acquisition submodule, for obtaining spare DF equipment；
First determination sub-module, for the spare DF equipment to be determined as the second main DF equipment.
8. any device of according to claim 6 or 7, which is characterized in that described device further includes the first acquisition module, institute
Stating the first acquisition module includes：
First receiving submodule, the second notification message sent for receiving the first main DF equipment；
Second acquisition submodule, for obtaining spare DF equipment according to the second notification message；Wherein, second notice disappears
The identification information of the spare DF equipment is carried in breath.
9. any device of according to claim 6 or 7, which is characterized in that described device further includes the second acquisition module, institute
Stating the second acquisition module includes：
Second receiving submodule, for receiving the third notice message sent from multiple opposite end VTEP；Wherein, each described
The identification information for the VTEP for sending the third notice message is carried in third notice message；
Second determination sub-module, for according to election regulation and the mark for carrying the VTEP for sending the third notice message
Know information and determines the spare DF equipment from multiple opposite end VTEP.
10. device according to claim 6, which is characterized in that described device further includes：
Receiving module, for receiving the 4th notification message from the described first main DF equipment；
Recovery module for cancelling the second main DF equipment according to the 4th notification message, and restores the described first main DF
Equipment；
Second forwarding module, for when receiving the data message forwarded to the purpose virtual machine, being led by described first
Data message described in DF device forwards；
Wherein, the 4th notice message table levies the first main DF equipment and reaches the standard grade.
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