CN104270298B - Message forwarding method and device in a kind of VXLAN networks - Google Patents
Message forwarding method and device in a kind of VXLAN networks Download PDFInfo
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- CN104270298B CN104270298B CN201410521367.8A CN201410521367A CN104270298B CN 104270298 B CN104270298 B CN 104270298B CN 201410521367 A CN201410521367 A CN 201410521367A CN 104270298 B CN104270298 B CN 104270298B
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Abstract
The invention discloses the message forwarding method in a kind of VXLAN networks, this method includes：Configure the tunnels VXLAN between the first virtual channel terminal VTEP and the 2nd VTEP；Calculate the first preferred path and the second preferred path between the first VTEP and the 2nd VTEP；First preferred path and second preferred path are associated with the tunnels VXLAN, and using first preferred path as main path, using second preferred path as standby path, so that message forwards on first preferred path；If not receiving fault detect message in the given time, it is determined that the first preferred path failure, and active-standby path switching is carried out, so that message forwards on second preferred path.The invention also discloses the apparatus for forwarding message in a kind of VXLAN networks.Business interruption time can be reduced using the present invention.
Description
Technical field
The present invention relates to network communication technology field, more particularly to message forwarding method and dress in a kind of VXLAN networks
It sets.
Background technology
In the multi-tenant environment of cloud computing, each tenant is required for distribution one that can be carried out very with other logical network
The logical network being isolated well.The isolation of logical network generally passes through virtual LAN (VLAN, Virtual Local Area
Network) technology solves.In IEEE802.1Q standards, due to the mark maximum 12bit of VLAN, so in a certain range
Maximum VLAN number only has 4K.As the multi-tenant demand under cloud environment is more and more, 4K VLAN cannot meet number
The demand disposed according to center large scale network.In addition, in cloud computing environment, workload is frequently necessary in multiple data centers
The application of two layer connectivities is limited with the region division for being migrated in multiple cloud platforms, and being currently based on IP subnets.
VXLAN networking schematic diagrams are as shown in Figure 1 at present.Virtual channel terminal (VTEP) equipment is the edge device of VXLAN.
The relevant treatment of VXLAN carries out all on VTEP, for example, identification ethernet data frame belonging to VXLAN, based on VXLAN to data
Frame carries out two layers of forwarding, encapsulation/decapsulation message etc., can be the virtual switch (vSwitch) of physical server, can also
It is physical switches.Such as Fig. 1, a virtual machine VM1 is run on a physical server, while having on that server
VSwitch1 is decapsulated as the first VTEP for the encapsulation of VXLAN messages, and one is run on another physical server virtually
Machine VM2, while thering is vSwitch2 to be decapsulated for the encapsulation of VXLAN messages as the 2nd VTEP on that server, then VM1
It is communicated by VXLAN between VM2, the tunnels VXLAN (Tunnel) can be established between the first VETP and the 2nd VTEP, this
Tunnel building relies on routing, can only Routing Protocol re-computation when having link or website to break down where tunnel on path
Routing is restored, and is calculated routing and is needed to occupy certain time, referred to as convergence time, then will go out within network convergence time
Existing VXLAN business cutout phenomenon, the recovery of VXLAN business depend on routing convergence time.For being controlled completely by control device
Network, if any Routing Protocol is not run between interchanger, path uplink where tunnel or website occur therefore
When barrier, VXLAN business can not continue at all.
Invention content
The present invention provides the message forwarding methods and device in a kind of VXLAN networks, can reduce business interruption time.
For achieving the above object, the present invention provides the message forwarding method in a kind of VXLAN networks, this method packets
It includes：
Configure the tunnels VXLAN between the first virtual channel terminal VTEP and the 2nd VTEP；
Calculate the first preferred path and the second preferred path between the first VTEP and the 2nd VTEP；
First preferred path and second preferred path are associated with the tunnels VXLAN, and will be described
First preferred path is as main path, using second preferred path as standby path, so that message is on the described first preferred road
It is forwarded on diameter；
If not receiving fault detect message in the given time, it is determined that the first preferred path failure, and carry out active and standby
Path switches, so that message forwards on second preferred path.
For achieving the above object, the present invention also provides the apparatus for forwarding message in a kind of VXLAN networks, the devices
Including：
Configuration module, for configuring the tunnels VXLAN between the first virtual channel terminal VTEP and the 2nd VTEP；
Computing module, for calculating the first preferred path and the second preferred road between the first VTEP and the 2nd VTEP
Diameter；
Relating module, for carrying out first preferred path and second preferred path with the tunnels VXLAN
Association, and using first preferred path as main path, using second preferred path as standby path, so that message is in institute
It states and is forwarded on the first preferred path；
Fault determination module, when for not receiving fault detect message in the given time, it is determined that the first preferred road
Diameter failure, and active-standby path switching is carried out by handover module, so that message forwards on second preferred path.
In conclusion the message forwarding method in VXLAN networks provided in the embodiment of the present invention includes：Configuration first
The tunnels VXLAN between virtual channel terminal VTEP and the 2nd VTEP；Calculate between the first VTEP and the 2nd VTEP
One preferred path and the second preferred path；By first preferred path and second preferred path and the tunnels VXLAN
It is associated, and using first preferred path as main path, using second preferred path as standby path, so that message
It is forwarded on first preferred path；If not receiving fault detect message in the given time, it is determined that the first preferred road
Diameter failure, and active-standby path switching is carried out, so that message forwards on second preferred path.It follows that the present invention is logical
Calculating active-standby path is crossed, and failure is used for quickly detecting on the path of flow forwarding, when detecting failure, in time will
Flow is switched on standby path, to ensure that VXLAN business being capable of fast quick-recovery.And in the prior art, once link or certain
A website breaks down, and just routing convergence can only be relied on to restore business, may result in VXLAN service disconnections, institute in convergence process
Compared with prior art, to greatly reduce business interruption time.
Description of the drawings
Fig. 1 is VXLAN networking schematic diagrams；
Fig. 2 is the flow diagram of the message forwarding method in a kind of VXLAN networks provided by the invention；
Fig. 3 is the application networking scene schematic diagram of the embodiment of the present invention one；
Fig. 4 is the application networking scene schematic diagram of the embodiment of the present invention two；
Fig. 5 is the apparatus structure schematic diagram that message forwards in a kind of VXLAN networks that the embodiment of the present invention proposes.
Specific implementation mode
Referring to the drawings, the embodiment of the present invention is described in further detail.
As shown in Fig. 2, the present invention provides the message forwarding method in a kind of VXLAN networks, this method includes：
The tunnels VXLAN between step 21, configuration the first virtual channel terminal VTEP and the 2nd VTEP；
The first preferred path and the second preferred path between step 22, calculating the first VTEP and the 2nd VTEP；
First preferred path and second preferred path are associated by step 23 with the tunnels VXLAN, and
Using first preferred path as main path, using second preferred path as standby path, so that message is described first
It is forwarded on preferred path；
If step 24 does not receive fault detect message in the given time, it is determined that the first preferred path failure is gone forward side by side
Row active-standby path switches, so that message forwards on second preferred path.
Further, after carrying out active-standby path switching, this method further comprises：
Calculate the third preferred path between the first VTEP and the 2nd VTEP；
By the third preferred path and the VXLAN tunnel-associateds, by first preferred path and the VXLAN tunnels
Road goes to be associated with, and using second preferred path as main path, using the third preferred path as standby path, so that message
It is forwarded on second preferred path.
Further, the third preferred path between calculating the first VTEP and the 2nd VTEP, by the described second preferred road
Diameter is as main path, and using the third preferred path as after path, the method further includes：
Receive the message of the first preferred path recovery；
By first preferred path and the VXLAN tunnel-associateds, by the third preferred path and the VXLAN tunnels
Road goes to be associated with, and using first preferred path as main path, using second preferred path as standby path, so that message
It is forwarded on first preferred path.
Said program includes two kinds of application scenarios, and a kind of scene is traditional network, i.e., inter-exchange can run road in network
By agreement；A kind of scene is the network controlled completely by control device, and the equipment in network does not run any Routing Protocol, is relied on
Flow table carries out message forwarding.Below by the embodiment of the present invention one and two further illustrate, the present invention by calculate active-standby path,
And failure is used for quickly detecting on the path of flow forwarding, when detecting failure, flow is switched to standby road in time
On diameter, to ensure that VXLAN business being capable of fast quick-recovery.
Embodiment one
For running the VXLAN networks of Routing Protocol, schematic network structure is as shown in figure 3, in Fig. 3 under the first VTEP
User 1 is hung, user 2 is hung under the 2nd VTEP.It is all controlled without control device by VTEP in this present embodiment and interchanger, or less
Face respectively configures, and is all the static configuration by way of order line.On the tunnels VXLAN between the first VTEP and the 2nd VTEP also
Including interchanger 1 to multiple intermediate equipments such as interchanger N.
Message forwarding method in one VXLAN networks of embodiment includes the following steps：
The tunnels VXLAN between step 31, the first VTEP configurations the first VTEP and the 2nd VTEP.
Step 32, the first VTEP calculate the first preferred path and second between the first VTEP and the 2nd VTEP preferably
Path.
Step 33, the first VTEP are by the next-hop of the first VTEP on first preferred path and the second preferred path
Be associated with outgoing interface and the tunnels VXLAN, formed with the active-standby path list items of the VXLAN tunnel-associateds, it is described with
The first preferred path is state of activation in the active-standby path list item of the VXLAN tunnel-associateds, and the second preferred path is un-activation
State, so that message forwards on first preferred path.
It should be noted that in the active-standby path list item with VXLAN tunnel-associateds, main path is active, standby
Path is in unactivated state, in this way, message will be forwarded in the main path being active.
Step 34, the first VTEP establish two-way converting detection on the tunnels VXLAN between the first VTEP and the 2nd VTEP
BFD sessions；If the first VTEP is not received by the BFD fault detect messages of the 2nd VTEP transmissions in the given time, really
The first preferred path failure that the fixed BFD fault detect messages are passed through.
Specifically, the present invention is to realize that failure quickly detects, and is established on the tunnel between the first VTEP and the 2nd VTEP
Two-way converting detects (Bidirectional Forwarding Detection, BFD) session.It should be noted that BFD is used for
Detect the communication failure between two equipment.A pair of of equipment periodically sends BFD messages on every channel between them,
If some equipment is not received by BFD messages within the sufficiently long time, then it is assumed that in the two-way that this arrives opposite equip.
Some part in road is out of order.It is illustrated, is having so that fault detect message is BFD messages as an example in the embodiment of the present invention
In body application, fault detect message is not limited to BFD messages, as long as the message of fault detect can be realized all in the guarantor of the present invention
It protects in range.
First preferred road in step 35, the first VTEP updates active-standby path list item with the VXLAN tunnel-associateds
First preferred path is updated to unactivated state by the state of activation of diameter and the second preferred path, and the second preferred path is updated
For state of activation, so that message forwards on second preferred path.
Further, after step 35, the first VTEP calculates the preferred road of third between the first VTEP and the 2nd VTEP
Diameter will be in institute by the next-hop of the first VTEP on the third preferred path and outgoing interface and the VXLAN tunnel-associateds
The next-hop and outgoing interface for stating the first VTEP on the first preferred path go to be associated with the tunnels VXLAN, and by described second
Preferred path updates the described and VXLAN tunnel-associateds as main path using the third preferred path as standby path
Active-standby path list item, the second preferred path in the active-standby path list item with the VXLAN tunnel-associateds is set as sharp
State living, third preferred path is set as unactivated state, so that message is forwarded on second preferred path.
Preferably, the first VTEP determines whether the first preferred path restores according to Routing Protocol, preferred when receiving first
The advertising of route message that path is restored, this method further comprise：
First VTEP is by the next-hop of the first VTEP on first preferred path and outgoing interface and the VXLAN tunnels
Road is associated with, and the next-hop of the first VTEP on the third preferred path and outgoing interface are gone to be associated with the tunnels VXLAN,
And using first preferred path as main path, using second preferred path as standby path, i.e. described in update and tunnel
First preferred path in the active-standby path list item with the VXLAN tunnel-associateds is arranged associated active-standby path list item
For state of activation, the second preferred path is set as unactivated state, so that message is forwarded on first preferred path.
Concrete scene is set forth below to be described in detail.
First VTEP (VTEP1) creates VXLAN Tunnel, and source IP address is configured in VXLAN Tunnel：VTEP1, mesh
IP address：VTEP2；
VTEP1 is calculated according to Routing Protocol to the path of VTEP2, if it find that there was only a paths to VTEP2, illustrates nothing
Method carries out path switching, message forwarding can only be carried out on the paths, so ending processing.
VTEP1 then finds out the first preferred path and the second preferred path point if it find that have at least two paths to VTEP2
Not Zuo Wei active-standby path, by the next-hop of the VTEP1 on the first preferred path and the second preferred path and outgoing interface and VXLAN
Tunnel is associated, and is formed and the associated main path list items 1 of VXLAN Tunnel and standby path list item 2：, as shown in table 1
| List item | Tunnel Identifier | Outgoing interface | Next-hop | State |
| List item 1 | VXLAN Tunnel | Outgoing interface 1 | Next-hop 1 | First preferred path state of activation |
| List item 2 | VXLAN Tunnel | Outgoing interface 2 | Next-hop 2 | Second preferred path unactivated state |
Table 1
Above-mentioned list item 1 and 2 is issued to forwarding chip by VTEP1, so that message forwards on main path.
After above-mentioned list item 1 and 2 is issued to forwarding chip by VTEP1, built on the tunnel between VTEP1 and VTEP2
Vertical BFD sessions, the i.e. both sides VTEP1 and VTEP2 enable BFD agreements, negotiate the period for sending BFD messages, and VTEP1 receives VTEP2
The BFD messages periodically sent, because above-mentioned list item 1 and 2 has been issued to forwarding chip by VTEP1, BFD messages can be in master
It is forwarded on path, when certain link on main path or website failure, VTEP1 would not be received in the given time
The BFD messages that VTEP2 is sent, therefore VTEP1 can perceive main path failure quickly, list item 1 and 2 is updated, such as table 2
It is shown：
| List item | Tunnel Identifier | Outgoing interface | Next-hop | State |
| List item 1 | VXLAN Tunnel | Outgoing interface 1 | Next-hop 1 | First preferred path unactivated state |
| List item 2 | VXLAN Tunnel | Outgoing interface 2 | Next-hop 2 | Second preferred path state of activation |
Table 2
Above-mentioned updated list item 1 and list item 2 are issued to forwarding chip by VTEP1, and notice forwarding chip carries out active and standby road
The switching of diameter, so that message forwards on the second preferred path.
Because above-mentioned list item 1 and list item 2 are issued to forwarding chip by VTEP1, that is, it is switched on standby path, so
BFD messages can forward on standby path, i.e., by BFD packet checks currently for path, i.e. the second preferred path.
Due to main path failure, flow has been switched on the second preferred path, at this moment needs to calculate new path, makees
For the standby path of the second preferred path, it is implemented as：
VTEP1 calculates the third preferred path to VTEP2 according to Routing Protocol, by the VTEP1 on third preferred path
Next-hop and outgoing interface be associated with VXLAN Tunnel, the next-hop of the VTEP1 on the first preferred path and will go out
Interface with VXLAN Tunnel be associated with, and the update of list item 1 is replaced with list item 3, as shown in table 3：
| List item | Tunnel Identifier | Outgoing interface | Next-hop | State |
| List item 2 | VXLAN Tunnel | Outgoing interface 2 | Next-hop 2 | Second preferred path state of activation |
| List item 3 | VXLAN Tunnel | Outgoing interface 3 | Next-hop 3 | Third preferred path unactivated state |
Table 3
VTEP1 deletes original list item 1 from forwarding chip, above-mentioned list item 3 is issued to forwarding chip, in this way, second
When certain link or website break down on preferred path, BFD, which can be quickly detected, to be come, and path can be occurred again and be cut
It changes, therefore BFD messages can forward on this new standby path of third preferred path, i.e., by BFD packet checks currently for road
Diameter, i.e. third preferred path.
In short, the solution of the present invention recalculates new standby path, to ensure subsequently to report after active-standby path switching
Text does not interrupt.
It is possible to restore after first preferred path failure, after which restores, advertising of route, VTEP1 can be carried out to VTEP1
After receiving the advertising of route on the path, by the next-hop of the VTEP1 on the first preferred path and outgoing interface and VXLAN
Tunnel is associated, and the next-hop of the VTEP1 on third preferred path and outgoing interface are gone with VXLAN Tunnel
Association, and list item 2 and the update of list item 3 are replaced with into list item 1 and list item 2, as shown in table 1.
Above-mentioned list item 1 and list item 2 are issued to forwarding chip by VTEP1, and notice forwarding chip carries out path smooth switching, with
Message is set to be forwarded on the first preferred path.Meanwhile because above-mentioned list item 1 is issued to forwarding chip by VTEP1, that is, switching
Onto the first preferred path, BFD messages can also forward on the first preferred path, i.e., by the current main path of BFD packet checks,
That is the first preferred path.
So far, the present embodiment is VXLAN tunnel creation active-standby paths, when VXLAN nets for the network of operation Routing Protocol
When network breaks down, it can find in time, and be quickly switched fast service traffics, reduce business interruption time.
Embodiment two
For being controlled by control device, flow table guidance forwarding VXLAN networks, schematic network structure as shown in figure 4,
User is VM1 under the first VTEP in Fig. 4, and user is VM2 under the 2nd VTEP.First VTEP and the 2nd VTEP and interchanger 1 to
Multiple intermediate equipments such as interchanger N are all controlled by control device, these equipment are vSwitch or physical switches, are not transported
Row Routing Protocol needs control device to issue flow table and message is instructed to forward.
Message forwarding method in two VXLAN networks of embodiment includes the following steps：
The tunnels VXLAN between step 41, control device configuration the first virtual channel terminal VTEP and the 2nd VTEP.
Step 42, control device calculate the first preferred path and second between the first VTEP and the 2nd VTEP preferably
Path.
Step 43, control device are by the next-hop of the first VTEP on first preferred path and the second preferred path
It is associated with outgoing interface and the tunnels VXLAN；The corresponding flow table of the first preferred path and second excellent is issued to the first VTEP
The matching of the corresponding flow table of the corresponding flow table of routing diameter, the corresponding flow table of first preferred path and the second preferred path
Item is identical, and the priority of the corresponding flow table of first preferred path is preferential higher than the corresponding flow table of the second preferred path
Grade, so that the first VTEP E-Packets according to the corresponding flow table of first preferred path on first preferred path.
Step 44, control device issue matching BFD fault detect messages to the first VTEP, and outgoing interface is the VXLAN
The flow table of tunnel interface, control device issue BFD fault detect messages to the first VTEP, so that the first VTEP is sent out to the 2nd VTEP
Send BFD fault detect messages；If control device is not received by the BFD fault detects sent on the 2nd VTEP in the given time
Message, it is determined that the first preferred path failure that the BFD fault detect messages are passed through.
Step 45, control device send modification flow table to the first VTEP, and the modification flow table is for informing described first
The priority of the corresponding flow table of the first preferred paths of VTEP has been modified to the priority less than the corresponding flow table of the second preferred path,
So that the first VTEP E-Packets according to the corresponding flow table of second preferred path on second preferred path.
Further, after step 45, control device calculates the preferred road of third between the first VTEP and the 2nd VTEP
Diameter will be in institute by the next-hop of the first VTEP on the third preferred path and outgoing interface and the VXLAN tunnel-associateds
The next-hop and outgoing interface for stating the first VTEP on the first preferred path go to be associated with the tunnels VXLAN, and by the third
Preferred path is used as standby path to issue third preferred path to the first VTEP using second preferred path as main path
Corresponding flow table, the corresponding flow table of the first preferred path of the corresponding flow table covering of third preferred path, the third are preferred
The occurrence of the corresponding flow table in path corresponding flow table with the second preferred path is identical, and the corresponding flow table of third preferred path
Priority be less than the corresponding flow table of the second preferred path priority so that the first VTEP is according to second preferred path pair
The flow table answered E-Packets on second preferred path.
Preferably, control device finds message LLDP collecting nets according to the link layer that each equipment being controlled by it is sent to
Network topology information, determines whether the first preferred path restores, and after the first preferred path restores, this method further comprises：
Control device is by the next-hop of the first VTEP on first preferred path and outgoing interface and the VXLAN tunnels
Road is associated with, and the next-hop of the first VTEP on the third preferred path and outgoing interface are gone to be associated with the tunnels VXLAN,
And it is issued to the first VTEP using second preferred path as standby path using first preferred path as main path
The corresponding flow table of first preferred path, the corresponding flow table of the corresponding flow table covering third preferred path of first preferred path,
The occurrence of the corresponding flow table corresponding flow table with the second preferred path of first preferred path is identical, and the first preferred road
The priority of the corresponding flow table of diameter is higher than the priority of the corresponding flow table of the second preferred path, so that the first VTEP is according to described the
The corresponding flow table of one preferred path E-Packets on first preferred path.
Concrete scene is set forth below to be described in detail.
It is to be controlled by control device by network in this present embodiment, so when communication between needing user again
Establish tunnel.Assuming that same communication is needed between currently having two users of VM1 and VM2, direct-connected first VTEP (VTEP1) of VM1,
Direct-connected 2nd VTEP (VTEP2) of VM2.Control device and all OVS equipment (OVS equipment includes VTEP) are established after connection, institute
There is OVS that link layer can be sent to find message (LLDP) on control device so that control device finds the topology of entire management network.
The purpose IP address (1.1.1.1) that VTEP1 receives VM1 transmissions is the message of the IP address of VM2, finds no
The flow table matched, therefore by message up sending control device, control device finds the direct-connected OVS of VM2 according to the purpose IP address of message
For VTEP2, therefore control device determines and establishes the tunnels VXLAN between VTEP1 and opposite end VTEP2, and configure VTEP1 with
The tunnels VXLAN of foundation between VTEP2 are VXLAN Tunne1.
Control device calculates the path from VTEP1 to VTEP2 according to the network topology of collection, if it find that only to VTEP2
There are a paths, explanation that can not carry out path switching, so directly issuing a flow table to VTEP1 is directed toward the path, at end
Reason.
Control device then finds out the first preferred path and second if it find that there is at least two paths from VTEP1 to VTEP2
Preferred path by the next-hop of the VTEP1 on the first preferred path and the second preferred path and goes out respectively as active-standby path
Interface is associated with VXLAN Tunne1, two flow tables is issued to VTEP1, as shown in flow table 1 and flow table 2：
Flow table 1
Flow table 2
When message matches in VTEP1 the flow table of high priority, during selecting main path forwarding, due to VTEP1 and
Routing Protocol is not also run in intermediate equipment between VTEP2, so when the intermediate equipment on main path receives message, it should
Intermediate equipment finds no matched flow table, by message up sending control device, control device according to the purpose IP address of message, under
Flow table is sent out, so that flow can be forwarded on VTEP2.Similarly, when the standby path of subsequent packet selection forwards, it is also desirable to pass through message
Control device is triggered by flow table issuance to corresponding intermediate equipment on path, to realize forwarding.It is handed down on path each
The flow table of intermediate equipment simultaneously differs, and has corresponding outgoing interface and next-hop.
Next, when message reaches VTEP2, control device is triggered by flow table also by by message up sending control device
It is handed down to VTEP2, the flow table 3 that control device is issued to VTEP2 is two-stage flow table, as shown in flow table 3, first order flow table occurrence
For purpose IP：VTEP2, action item are solution VXLAN encapsulation；Second level flow table occurrence is purpose IP：VM2, action item are in phase
Exit port is answered to be forwarded to user VM2.
Flow table 3
In this way, the flow table that message can match high priority in VTEP1 is forwarded to VM2 on main path.
After flow table issuance, the present invention is to realize that failure quickly detects, and control device is issued to VTEP1 allows BFD to report
Text passes through, to carry out the flow table of fault detect, as shown in flow table 4：
Flow table 4
The corresponding flow table 5 that control device is issued to VTEP2 is two-stage flow table, and first order flow table occurrence is purpose IP：
VTEP2；Action item is solution VXLAN encapsulation；Second level flow table occurrence is that the protocol number of message is BFD message protocols number；Action
Item is above to send control device.
Flow table 5
Meanwhile control device constructs BFD messages, and is handed down to VTEP1, triggering VTEP1 periodically send BFD messages to
VTEP2 is carried out in this way, the outgoing interface of BFD messages matching flow table 4 is tunnel face hence into the main path of the tunnel-associated
Forwarding, when certain link on main path or website failure, VTEP2 would not receive VTEP1 in the given time
The BFD messages of transmission, into without above sending control device, therefore control device can perceive main path failure quickly, to
VTEP1, which is sent, changes flow table, and the priority of first preferred path is changed in flow table 1, as shown in flow table 6：
Flow table 6
In this way, the flow table that message can match high priority in VTEP1 is forwarded to VM2 on the second preferred path.
Because the outgoing interface for matching the flow table of BFD messages is tunnel face, it is excellent second that BFD messages will match flow table
It is forwarded on routing diameter, that is, detects current second preferred path.
Due to main path failure, flow has been switched on the second preferred path, at this moment needs to calculate new path, makees
For the standby path of the second preferred path, it is implemented as：
Control device calculates the third preferred path from VTEP1 to VTEP2 according to the network topology of collection, will be excellent in third
The next-hop and outgoing interface of VTEP1 on routing diameter is associated with VXLAN Tunnel, will be on the first preferred path
The next-hop and outgoing interface of VTEP1 with VXLAN Tunnel be associated with, and issues a flow table 7 to VTEP1, due to first
Preferred path failure, so the flow table 7 covers the flow table 6 of the first preferred path, and as standby path, the priority of flow table 7 is low
In the priority of flow table 2.
Flow table 7
In this way, when certain link or website break down on the second preferred path, BFD, which can also be quickly detected, to be come,
Path switching can occur again, therefore BFD messages can forward on this new standby path of third preferred path, that is, pass through
BFD packet checks are currently for path, i.e. third preferred path.
In short, the solution of the present invention recalculates new standby path, to ensure subsequently to report after active-standby path switching
Text does not interrupt.
It is possible to restore after first preferred path failure, the LLDP messages that control device is sent to according to each OVS equipment
Collection network topology information, determines whether the first preferred path restores, and after the first preferred path restores, control device can incite somebody to action
The next-hop and outgoing interface of VTEP1 on the first preferred path is associated with VXLAN Tunnel, will be on the preferred road of third
The next-hop and outgoing interface of VTEP1 on diameter with VXLAN Tunnel be associated with, and re-issues a flow table to VTEP1
1, which covers the flow table 7 of third preferred path, and as main path, and the priority of flow table 1 is higher than the priority of flow table 2.
Meanwhile BFD messages can also match flow table and be forwarded on the first preferred path, i.e., currently led by BFD packet checks
Path, i.e. the first preferred path.
So far, for the present embodiment for being controlled by control device, the VXLAN networks of flow table guidance forwarding pass through control device
Control calculates active-standby path and is handed down to OVS and triggers main path progress BFD detections finds network failure in time, timely right
VXLAN business is switched fast, and business interruption time is reduced.
It should be noted that various embodiments of the present invention are to establish the unidirectional tunnel between the first VTEP to the 2nd VTEP, it is real
User sends message to user under the 2nd VTEP under existing first VTEP, it is ensured that flow is switched fast.In practical applications, tunnel two
The user at end will realize and communicate that user sends message to user under the first VTEP under the 2nd VTEP to realize, it is ensured that flow
It is switched fast, needs to establish the reverse tunnel between the 2nd VTEP to the first VTEP, specific implementation is symmetrically implemented second
VTEP is upper, and details are not described herein.
Based on same inventive concept, one embodiment of the invention also proposes the apparatus for forwarding message in a kind of VXLAN networks,
Referring to Fig. 5.The device includes：
Configuration module 501, for configuring the tunnels VXLAN between the first virtual channel terminal VTEP and the 2nd VTEP；
Computing module 502, for calculating the first preferred path between the first VTEP and the 2nd VTEP and second excellent
Routing diameter；
Relating module 503, for will first preferred path and second preferred path and the tunnels VXLAN into
Row association, and using first preferred path as main path, using second preferred path as standby path, so that message exists
It is forwarded on first preferred path；
Fault determination module 504, when for not receiving fault detect message in the given time, it is determined that first preferably
Path failure, and active-standby path switching is carried out by handover module 505, so that message forwards on second preferred path.
After handover module 505 carries out active-standby path switching,
The computing module 502 is additionally operable to calculate the third preferred path between the first VTEP and the 2nd VTEP；
The relating module 503 is additionally operable to the third preferred path and the VXLAN tunnel-associateds, by described
One preferred path goes to be associated with the tunnels VXLAN, and using second preferred path as main path, and the third is preferred
Path is used as standby path, so that message is forwarded on second preferred path.
Described device further includes that receiving module 506 is restored in path, the message for receiving the recovery of the first preferred path；
The relating module 503 is additionally operable to first preferred path and the VXLAN tunnel-associateds, by described
Three preferred paths go to be associated with the tunnels VXLAN, and using first preferred path as main path, preferably by described second
Path is used as standby path, so that message is forwarded on first preferred path.
For running the VXLAN networks of Routing Protocol, described device is applied to the first VTEP；
The relating module 503, by first preferred path and second preferred path and the tunnels VXLAN
It is associated, and using first preferred path as main path, using second preferred path as standby path, so that message
When being forwarded on first preferred path, it is specifically used for first on first preferred path and the second preferred path
The next-hop and outgoing interface of VTEP is associated with the tunnels VXLAN, forms the active-standby path with the VXLAN tunnel-associateds
List item, the first preferred path is state of activation, the second preferred road in the active-standby path list item with the VXLAN tunnel-associateds
Diameter is unactivated state, so that message forwards on first preferred path.
The handover module 505 is carrying out active-standby path switching, so that message when being forwarded on the second preferred path, has
Body is used to update the first preferred path and the second preferred path in the active-standby path list item with the VXLAN tunnel-associateds
State of activation, unactivated state is updated to by the first preferred path, the second preferred path is updated to state of activation, so that message
It is forwarded on second preferred path.
Described device further comprises two-way converting detection BFD session establishments module 507, for relating module by described the
One preferred path and second preferred path are associated with the tunnels VXLAN, and using first preferred path as
Main path, using second preferred path as standby path after, on the tunnels VXLAN between the first VTEP and the 2nd VTEP
Establish two-way converting detection BFD sessions；
The fault determination module 504, is specifically used for, if the first VTEP is not received by second in the given time
The BFD fault detect messages that VTEP is sent, it is determined that the first preferred path failure that the BFD fault detect messages are passed through.
For being controlled by control device, the VXLAN networks of flow table guidance forwarding, described device is applied to control device；
The relating module 503, by first preferred path and second preferred path and the tunnels VXLAN
It is associated, and using first preferred path as main path, using second preferred path as standby path, so that message
When being forwarded on first preferred path, it is specifically used for first on first preferred path and the second preferred path
The next-hop and outgoing interface of VTEP is associated with the tunnels VXLAN；It is corresponding that the first preferred path is issued to the first VTEP
The corresponding flow table of flow table and the second preferred path, the correspondence of first preferred path corresponding flow table and the second preferred path
Flow table occurrence it is identical, and the priority of the corresponding flow table of first preferred path be higher than the second preferred path correspondence
Flow table priority so that the first VTEP according to the corresponding flow table of first preferred path on first preferred path
It E-Packets.
The handover module 505 is carrying out active-standby path switching, so that message when being forwarded on the second preferred path, has
Body is used to send modification flow table to the first VTEP, and the modification flow table is for informing that the first preferred paths of the first VTEP correspond to
The priority of flow table have been modified to the priority less than the corresponding flow table of the second preferred path so that the first VTEP is according to
The corresponding flow table of second preferred path E-Packets on second preferred path.
Described device further comprises that BFD issues module 508, for relating module by first preferred path and described
Second preferred path is associated with the tunnels VXLAN, and using first preferred path as main path, by described second
Preferred path is used as after standby path, issues matching BFD fault detect messages to the first VTEP, and outgoing interface is the VXLAN
The flow table of tunnel interface issues BFD fault detect messages to the first VTEP, so that the first VTEP sends BFD events to the 2nd VTEP
Hinder detection messages；
The fault determination module 504, is specifically used for, if control device is not received by second in the given time
The BFD fault detect messages sent on VTEP, it is determined that the first preferred path failure that the BFD fault detect messages are passed through.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in the protection of the present invention
Within the scope of.
Claims (16)
1. the message forwarding method in a kind of VXLAN networks, this method include：
Configure the tunnels VXLAN between the first virtual channel terminal VTEP and the 2nd VTEP；
Calculate the first preferred path and the second preferred path between the first VTEP and the 2nd VTEP；
First preferred path and second preferred path are associated with the tunnels VXLAN, and by described first
Preferred path is as main path, using second preferred path as standby path, so that message is on first preferred path
Forwarding；
If not receiving fault detect message in the given time, it is determined that the first preferred path failure, and carry out active-standby path
Switching, so that message forwards on second preferred path；
After carrying out active-standby path switching, this method further comprises：
Calculate the third preferred path between the first VTEP and the 2nd VTEP；By the third preferred path and the VXLAN tunnels
Road is associated with, and first preferred path is gone to be associated with the tunnels VXLAN, and using second preferred path as main road
Diameter, using the third preferred path as standby path, so that message is forwarded on second preferred path.
2. the method as described in claim 1, which is characterized in that the third between calculating the first VTEP and the 2nd VTEP is preferred
Path, using second preferred path as main path, using the third preferred path as after path, the method is also
Including：
Receive the message of the first preferred path recovery；
By first preferred path and the VXLAN tunnel-associateds, the third preferred path and the tunnels VXLAN are gone
Association, and using first preferred path as main path, using second preferred path as standby path, so that message is in institute
It states and is forwarded on the first preferred path.
3. the method as described in claim 1-2 is any, which is characterized in that described for running the VXLAN networks of Routing Protocol
Method is applied to the first VTEP；
It is described to be associated first preferred path and second preferred path with the tunnels VXLAN, and will be described
First preferred path is as main path, using second preferred path as standby path, so that message is on the described first preferred road
The method forwarded on diameter specifically includes：
By the next-hop of the first VTEP on first preferred path and the second preferred path and outgoing interface and the VXLAN
Tunnel is associated, and forms the active-standby path list item with the VXLAN tunnel-associateds, described and the VXLAN tunnel-associateds
The first preferred path is state of activation in active-standby path list item, and the second preferred path is unactivated state, so that message is described
It is forwarded on first preferred path.
4. method as claimed in claim 3, which is characterized in that
The progress active-standby path switching, so that the method that message forwards on the second preferred path specifically includes：
The first preferred path and the second preferred path swashs in the update active-standby path list item with the VXLAN tunnel-associateds
State living, is updated to unactivated state by the first preferred path, the second preferred path is updated to state of activation, so that message exists
It is forwarded on second preferred path.
5. method as claimed in claim 3, which is characterized in that described by first preferred path and the second preferred road
Diameter is associated with the tunnels VXLAN, and using first preferred path as main path, second preferred path is made
After standby path, this method further comprises：Two-way turn is established on the tunnels VXLAN between the first VTEP and the 2nd VTEP
Hair detection BFD sessions；
If described do not receive fault detect message in the given time, it is determined that the first preferred path failure specifically includes：
If the first VTEP is not received by the BFD fault detect messages of the 2nd VTEP transmissions in the given time, it is determined that should
The first preferred path failure that BFD fault detect messages are passed through.
6. the method as described in claim 1-2 is any, which is characterized in that for being controlled by control device, flow table guidance forwarding
VXLAN networks, the method be applied to control device；
It is described to be associated first preferred path and second preferred path with the tunnels VXLAN, and will be described
First preferred path is as main path, using second preferred path as standby path, so that message is on the described first preferred road
The method forwarded on diameter specifically includes：
By the next-hop of the first VTEP on first preferred path and the second preferred path and outgoing interface and the VXLAN
Tunnel is associated；The corresponding flow table of the first preferred path and the corresponding flow table of the second preferred path are issued to the first VTEP,
The occurrence of the corresponding flow table corresponding flow table with the second preferred path of first preferred path is identical, and described first excellent
The priority of the corresponding flow table of routing diameter is higher than the priority of the corresponding flow table of the second preferred path, so that the first VTEP is according to institute
The corresponding flow table of the first preferred path is stated to E-Packet on first preferred path.
7. method as claimed in claim 6, which is characterized in that
The progress active-standby path switching, so that the method that message forwards on the second preferred path specifically includes：
Modification flow table is sent to the first VTEP, the modification flow table is for informing that the first preferred paths of the first VTEP are corresponding
The priority of flow table has been modified to the priority less than the corresponding flow table of the second preferred path, so that the first VTEP is according to described the
The corresponding flow table of two preferred paths E-Packets on second preferred path.
8. method as claimed in claim 6, which is characterized in that described by first preferred path and the second preferred road
Diameter is associated with the tunnels VXLAN, and using first preferred path as main path, second preferred path is made
After standby path, this method further comprises：Control device issues matching BFD fault detect messages to the first VTEP, and goes out
Interface is the flow table of the VXLAN tunnel interfaces, and control device issues BFD fault detect messages to the first VTEP, so that first
VTEP sends BFD fault detect messages to the 2nd VTEP；
If described do not receive fault detect message in the given time, it is determined that the first preferred path failure specifically includes：
If control device is not received by the BFD fault detect messages sent on the 2nd VTEP in the given time, it is determined that should
The first preferred path failure that BFD fault detect messages are passed through.
9. the apparatus for forwarding message in a kind of VXLAN networks, the device include：
Configuration module, for configuring the tunnels VXLAN between the first virtual channel terminal VTEP and the 2nd VTEP；
Computing module, for calculating the first preferred path and the second preferred path between the first VTEP and the 2nd VTEP；
Relating module, for first preferred path and second preferred path to be associated with the tunnels VXLAN,
And using first preferred path as main path, using second preferred path as standby path, so that message is described the
It is forwarded on one preferred path；
Fault determination module, when for not receiving fault detect message in the given time, it is determined that the first preferred path event
Barrier, and active-standby path switching is carried out by handover module, so that message forwards on second preferred path；
After handover module carries out active-standby path switching,
The computing module is additionally operable to calculate the third preferred path between the first VTEP and the 2nd VTEP；
The relating module is additionally operable to the third preferred path and the VXLAN tunnel-associateds, by the described first preferred road
Diameter goes to be associated with the tunnels VXLAN, and using second preferred path as main path, using the third preferred path as
Standby path, so that message is forwarded on second preferred path.
10. device as claimed in claim 9, which is characterized in that
Described device further includes that receiving module is restored in path, the message for receiving the recovery of the first preferred path；
The relating module is additionally operable to first preferred path and the VXLAN tunnel-associateds, by the preferred road of the third
Diameter goes to be associated with the tunnels VXLAN, and using first preferred path as main path, using second preferred path as
Standby path, so that message is forwarded on first preferred path.
11. the device as described in claim 9-10 is any, which is characterized in that for running the VXLAN networks of Routing Protocol, institute
It states device and is applied to the first VTEP；
The relating module is closed by first preferred path and second preferred path with the tunnels VXLAN
Connection, and using first preferred path as main path, using second preferred path as standby path, so that message is described
When being forwarded on the first preferred path, it is specifically used for the first VTEP's on first preferred path and the second preferred path
Next-hop and outgoing interface are associated with the tunnels VXLAN, form the active-standby path list item with the VXLAN tunnel-associateds,
The first preferred path is state of activation in the active-standby path list item with the VXLAN tunnel-associateds, and the second preferred path is
Unactivated state, so that message forwards on first preferred path.
12. device as claimed in claim 11, which is characterized in that
The handover module is carrying out active-standby path switching, so that message when being forwarded on the second preferred path, is specifically used for more
The activation shape of first preferred path and the second preferred path in the new active-standby path list item with the VXLAN tunnel-associateds
State, unactivated state is updated to by the first preferred path, the second preferred path is updated to state of activation, so that message is described
It is forwarded on second preferred path.
13. device as claimed in claim 11, which is characterized in that described device further comprises that two-way converting detects BFD meetings
Words establish module, for relating module will first preferred path and second preferred path and the tunnels VXLAN into
Row association, and will first preferred path as main path, using second preferred path as after path, first
Two-way converting detection BFD sessions are established on the tunnels VXLAN between VTEP and the 2nd VTEP；
The fault determination module, is specifically used for, if the first VTEP is not received by the 2nd VTEP transmissions in the given time
BFD fault detect messages, it is determined that the first preferred path failure that the BFD fault detect messages are passed through.
14. the device as described in claim 9-10 is any, which is characterized in that for being controlled by control device, flow table guidance turns
The VXLAN networks of hair, described device are applied to control device；
The relating module is closed by first preferred path and second preferred path with the tunnels VXLAN
Connection, and using first preferred path as main path, using second preferred path as standby path, so that message is described
When being forwarded on the first preferred path, it is specifically used for the first VTEP's on first preferred path and the second preferred path
Next-hop and outgoing interface are associated with the tunnels VXLAN；To the first VTEP issue the corresponding flow table of the first preferred path and
The corresponding flow table of second preferred path, the corresponding flow table of first preferred path corresponding flow table and the second preferred path
Occurrence it is identical, and the priority of the corresponding flow table of first preferred path be higher than the second preferred path corresponding flow table
Priority so that the first VTEP forwards report according to the corresponding flow table of first preferred path on first preferred path
Text.
15. device as claimed in claim 14, which is characterized in that
The handover module is carrying out active-standby path switching so that message is on the second preferred path when forwarding, be specifically used for
First VTEP sends modification flow table, and the modification flow table is for informing the corresponding flow table of the first preferred paths of the first VTEP
Priority has been modified to the priority less than the corresponding flow table of the second preferred path, so that the first VTEP is preferred according to described second
The corresponding flow table in path E-Packets on second preferred path.
16. device as claimed in claim 14, which is characterized in that described device further comprises that BFD issues module, for closing
First preferred path and second preferred path are associated by gang mould block with the tunnels VXLAN, and by described
One preferred path issues matching BFD events using second preferred path as after path as main path to the first VTEP
Hinder detection messages, and the flow table that outgoing interface is the VXLAN tunnel interfaces, BFD fault detect messages are issued to the first VTEP, with
The first VTEP is set to send BFD fault detect messages to the 2nd VTEP；
The fault determination module, is specifically used for, and is sent if control device is not received by the given time on the 2nd VTEP
BFD fault detect messages, it is determined that the first preferred path failure that the BFD fault detect messages are passed through.
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