CN108667709A

CN108667709A - A kind of message forwarding method and device

Info

Publication number: CN108667709A
Application number: CN201810483399.1A
Authority: CN
Inventors: 黄李伟; 王伟
Original assignee: New H3C Technologies Co Ltd
Current assignee: New H3C Technologies Co Ltd
Priority date: 2018-05-18
Filing date: 2018-05-18
Publication date: 2018-10-16
Anticipated expiration: 2038-05-18
Also published as: CN108667709B

Abstract

A kind of message forwarding method of the application offer and device, it may include：Receive message；When the outgoing interface for determining the matched forwarding-table item of message received is the tunnel face in the tunnels target VXLAN, in the corresponding multiple physics forward-paths in the tunnels the target VXLAN, selection target physics forward-path；The tunnels the target VXLAN are any of described at least one tunnels VXLAN；According to the target physical forward-path, the first VXLAN messages after being packaged to the message are forwarded；The first VXLAN messages carry the information of the target physical forward-path.Using method provided by the present application, physics forward-path can neatly be selected to forward the message forwarded by the tunnels VXLAN.

Description

A kind of message forwarding method and device

Technical field

This application involves computer communication field more particularly to a kind of message forwarding methods and device.

Background technology

VXLAN (Virtual eXtensible LAN, expansible Virtual Local Area Network) is to be based on IP (Internet Protocol Address, Internet protocol address) network, using " MAC (Media Access Control, media interviews control System) in UDP (User Datagram Protocol, User Datagram Protocol) " packing forms two-layer VPN (Virtual Private Network, Virtual Private Network) technology.VXLAN can be based on existing service provider or enterprise IP network, Two layers of interconnection are provided for the physical site of dispersion, and business isolation can be provided for different tenants.

In VXLAN networks, it can be built between two VTEP (VXLAN Tunnel End Point, VXLAN endpoint of a tunnel) The vertical tunnels VXLAN.In general, the tunnels VXLAN are corresponding with actual physics forward-path, which passes through for forwarding The message in the tunnels VXLAN, the physics forward-path are usually calculated by Routing Protocol.When tunnel source VTEP is needed message When being sent to tunnel purpose VTEP, tunnel source VTEP can carry out VXLAN encapsulation to the message, and by the VXLAN messages after encapsulation It is sent to tunnel purpose VTEP by the corresponding physics forward-path in the tunnels VXLAN.But when the physics forward-path congestion Or when failure, tunnel source VTEP will be by the packet loss, to cause to stop.

Invention content

In view of this, a kind of message forwarding method of the application offer and device, to prevent from stopping.

Specifically, the application is achieved by the following technical solution：

According to the application's in a first aspect, providing a kind of message forwarding method, the method is applied to VTEP, including：

According to the application's in a first aspect, providing a kind of message forwarding method, the method is applied to VTEP, the VTEP Corresponding at least one tunnels the VXLAN multiple physics forward-paths of device configuration；Wherein, the VTEP equipment is described more When the head node of a physics forward-path, the method includes：

Receive message；

When the outgoing interface for determining the matched forwarding-table item of message received is the tunnel face in the tunnels target VXLAN, In the corresponding multiple physics forward-paths in the tunnels the target VXLAN, selection target physics forward-path；The target VXLAN Tunnel is any of described at least one tunnels VXLAN；

According to the target physical forward-path, the first VXLAN messages after being packaged to the message are forwarded；It is described First VXLAN messages carry the information of the target physical forward-path.

Optionally, described in the corresponding multiple physics forward-paths in the tunnels the target VXLAN, selection target physics turns Path is sent out, including：

When the routing for determining this VTEP to the purpose VTEP of the tunnels target VXLAN connection is unreachable, selection is different In the target physical forward-path of the unreachable routing.

Optionally, the information of the target physical forward-path includes the IP of the node on target physical forward-path Location；

It is described to forward the first VXLAN messages after being packaged to the message according to the target physical forward-path, Including：

In other nodes on the target physical forward-path in addition to this VTEP and terminal note, selection target section Point；

Determine this VTEP to the destination node routing up to when, the message is packaged into the first VXLAN messages, And forward the first VXLAN messages；

Wherein, the purpose IP address of the first VXLAN messages is the IP of the destination node；First VXLAN Message carries the IP address of the intermediate node between the terminal note on the destination node and the target physical forward-path and is somebody's turn to do The IP address of terminal note on target physical forward-path；

Or the first VXLAN messages only carry the IP address of the terminal note on target physical forward-path.

Optionally, the method further includes：

Set the value of the specific field of the first VXLAN messages to the first preset value；The first preset value table Show that the first VXLAN messages carry the IP address of the node on the target physical forward-path.

Optionally, when the VTEP is the SDN forwarding units in SDN network, at least one tunnels VXLAN correspond to Multiple physics forward-paths configure in the following way：

It receives the VXLAN Tunnel Identifiers that SDN controllers issue and the corresponding of the multiple physics forward-paths being pre-configured is closed System.

Optionally, the method further includes：

When the routing for determining this VTEP to the purpose VTEP of the tunnels target VXLAN connection is unreachable, to the report Text carries out VXLAN encapsulation, forms the 2nd VXLAN messages；

Wherein, the purpose IP address of the 2nd VXLAN messages is the IP address of the purpose VTEP；The 2nd VXLAN reports The value of the preset field of text is the second preset value；Second preset value indicates that the 2nd VXLAN messages do not carry any object Manage the IP address of the node on forward-path.

According to the second aspect of the application, a kind of message forwarding method is provided, the method is applied to VTEP, the VTEP Corresponding at least one tunnels the VXLAN multiple physics forward-paths of device configuration；Wherein, the VTEP equipment is multiple objects The non-head node on forward-path is managed, the method includes：

Receive the first VXLAN messages sent out by the head node on the corresponding target physical forward-path in target tunnel；Institute It is the corresponding tunnels VXLAN of the first VXLAN messages to state the tunnels target VXLAN；The target physical forward-path is described The physics forward-path that head node is selected from the corresponding a plurality of physics forward-path in the tunnels the target VXLAN；

After determining the IP address that the purpose IP address of the first VXLAN messages is this VTEP, described first is checked Whether VXLAN messages carry the information of target physical forward-path；

If carried, according to the information of the target physical forward-path, after being decapsulated to the first VXLAN messages Message re-start VXLAN encapsulation, formed the 2nd VXLAN messages simultaneously forward.

Optionally, the information for checking the first VXLAN messages and whether carrying target physical forward-path, including：

Check the value of the specific field of the first VXLAN messages；

If the value of the specific field of the first VXLAN messages is the first preset value, the first VXLAN messages are determined Carry the information of target physical forward-path；

If the value of the specific field of the first VXLAN messages is the second preset value, the first VXLAN messages are determined The information of target physical forward-path is not carried.

Optionally, the information of the target physical forward-path is the IP of the node on the target physical forward-path Location；

The information according to the target physical forward-path, the message after being decapsulated to the first VXLAN messages VXLAN encapsulation is re-started, the 2nd VXLAN messages are formed and is forwarded, including：

When the routing for determining the terminal note on this VTEP to the target physical forward-path is unreachable and this VTEP is to institute State between terminal note there are when intermediate node, from the target physical forward-path that the first VXLAN messages carry except eventually In node except node, selection target node；

When determining that this VTEP is reachable to destination node routing, the message after being decapsulated to the first VXLAN messages VXLAN encapsulation is re-started, the 2nd VXLAN messages are formed and is forwarded；

Wherein, the purpose IP address of the 2nd VXLAN messages is the destination node IP address；

The 2nd VXLAN messages carry the intermediate node between the destination node and the terminal note IP address, And the IP address of the terminal note；Or the 2nd VXLAN messages only carry the IP address of the terminal note；

The value of the specific field of the 2nd VXLAN messages is the first preset value；The first preset value mark second VXLAN messages carry the IP address of node on target physical forward-path.

Optionally, the information according to the target physical forward-path, after being decapsulated to the first VXLAN messages Message re-start VXLAN encapsulation, formed the 2nd VXLAN messages simultaneously forward, further include：

When the routing for determining the terminal note on this VTEP to the target physical forward-path up to when, to this first Message after the decapsulation of VXLAN messages re-starts VXLAN encapsulation, forms the 3rd VXLAN messages；

Wherein, the purpose IP address of the 3rd VXLAN messages is the IP address of the terminal note；3rd VXLAN Message does not carry the IP address of node on target physical forward-path；

The value of the specific field of the 3rd VXLAN messages is the second preset value, second preset value indicate this Three VXLAN messages do not carry the IP address of node on the target physical forward-path.

Optionally, the method further includes：

If the first VXLAN messages do not carry the information of target physical forward-path, the first VXLAN is reported Text is decapsulated, and is forwarded to the message after decapsulation.

According to the third aspect of the application, a kind of apparatus for forwarding message is provided, described device is applied to VTEP, the VTEP Corresponding at least one tunnels the VXLAN multiple physics forward-paths of device configuration；Wherein, the VTEP equipment is described more When the head node of a physics forward-path, described device includes：

Receiving unit, for receiving message；

Selecting unit, for being the tunnels target VXLAN in the outgoing interface for determining the matched forwarding-table item of message received Tunnel face when, in the corresponding multiple physics forward-paths in the tunnels the target VXLAN, selection target physics forward-path； The tunnels the target VXLAN are any of described at least one tunnels VXLAN；

Retransmission unit, for according to the target physical forward-path, forwarding first after being packaged to the message VXLAN messages；The first VXLAN messages carry the information of the target physical forward-path.

Optionally, the selecting unit, in the corresponding multiple physics forward-paths in the tunnels the target VXLAN, selection When target physical forward-path, specifically for determining this VTEP to the road of the purpose VTEP of the tunnels target VXLAN connection By it is unreachable when, be selected differently from the target physical forward-path of the unreachable routing.

The retransmission unit is specifically used for its on the target physical forward-path in addition to this VTEP and terminal note In his node, selection target node；Determine this VTEP to the destination node routing up to when, the message is packaged into First VXLAN messages, and forward the first VXLAN messages；Wherein, the purpose IP address of the first VXLAN messages is institute With stating the IP of destination node；The first VXLAN messages carry the whole section on the destination node and the target physical forward-path The IP address of intermediate node between point and the IP address of the terminal note on the target physical forward-path；Or described One VXLAN messages only carry the IP address of the terminal note on target physical forward-path.

According to the fourth aspect of the application, a kind of apparatus for forwarding message is provided, described device is applied to VTEP, the VTEP Corresponding at least one tunnels the VXLAN multiple physics forward-paths of device configuration；Wherein, the VTEP equipment is multiple objects The non-head node on forward-path is managed, described device includes：

Receiving unit, for receiving sent out by the head node on the corresponding target physical forward-path in target tunnel first VXLAN messages；The tunnels the target VXLAN are the corresponding tunnels VXLAN of the first VXLAN messages；The target physical turns Hair path is the physics forwarding that the head node is selected from the corresponding a plurality of physics forward-path in the tunnels the target VXLAN Path；

Inspection unit, for after determining the IP address that the purpose IP address of the first VXLAN messages is this VTEP, examining Look into the information whether the first VXLAN messages carry target physical forward-path；

Retransmission unit, if for carrying, according to the information of the target physical forward-path, to described first Message after the decapsulation of VXLAN messages re-starts VXLAN encapsulation, forms the 2nd VXLAN messages and forwards.

The retransmission unit is specifically used for when the road for determining the terminal note on this VTEP to the target physical forward-path By unreachable and this VTEP, to the terminal note, there are targets when intermediate node, carried from the first VXLAN messages In the node in addition to terminal note on physics forward-path, selection target node；Determining this VTEP to the destination node When routing is reachable, the message after being decapsulated to the first VXLAN messages re-starts VXLAN encapsulation, forms the 2nd VXLAN messages And it forwards；Wherein, the purpose IP address of the 2nd VXLAN messages is the destination node IP address；The 2nd VXLAN reports Text carries the IP address of the intermediate node between the destination node and the terminal note and the IP address of the terminal note； Or the 2nd VXLAN messages only carry the IP address of the terminal note；The specific field of the 2nd VXLAN messages takes Value is the first preset value；First preset value identifies the 2nd VXLAN messages and carries node on target physical forward-path IP address.

Optionally, the retransmission unit, also particularly useful for when on determining this VTEP to the target physical forward-path The routing of terminal note up to when, to the first VXLAN messages decapsulate after message re-start VXLAN encapsulation, formed third VXLAN messages；Wherein, the purpose IP address of the 3rd VXLAN messages is the IP address of the terminal note；The third VXLAN messages do not carry the IP address of node on target physical forward-path；The specific field of the 3rd VXLAN messages takes Value is the second preset value, and second preset value indicates that the 3rd VXLAN messages do not carry and saved on the target physical forward-path The IP address of point.

Due to the application VTEP receive after the message forwarded by tunnel, no longer by the tunnel it is corresponding, by The acquiescence physics forward-path that Routing Protocol calculates forwards the message, but in the corresponding a plurality of physics forward-path in the tunnel One physics forward-path of selection forwards the message, on the one hand, reduces the congestion for acquiescence physics forward-path；Another party The selection in face, the physics forward-path when VTEP is E-Packeted by tunnel is more flexible.

In addition, when above-mentioned acquiescence physics forward-path is obstructed, (i.e. this VTEP arrives the purpose VTEP's of the tunnels VXLAN connection It route unreachable) when, VTEP can not be by packet loss to be forwarded, but the physics for being selected differently from the unreachable routing turns Hair path forwards the ether network packet, to prevent the interruption of service traffics.

Description of the drawings

Fig. 1 is the physics Actual path forwarding schematic diagram in a kind of Underlay networks shown in the application；

Fig. 2 is a kind of flow chart of message forwarding method shown in one exemplary embodiment of the application；

Fig. 3 is the flow chart of another message forwarding method shown in one exemplary embodiment of the application；

Fig. 4 is the physics Actual path forwarding schematic diagram in another Underlay networks shown in the application；

Fig. 5 is that the application provides a kind of hardware architecture diagram of apparatus for forwarding message place VTEP；

Fig. 6 is a kind of block diagram of apparatus for forwarding message corresponding with Fig. 5 shown in one exemplary embodiment of the application；

Fig. 7 is the hardware architecture diagram of VTEP where the application provides another apparatus for forwarding message；

Fig. 8 is a kind of block diagram of apparatus for forwarding message corresponding with Fig. 7 shown in one exemplary embodiment of the application.

Specific implementation mode

Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended The example of consistent device and method of some aspects be described in detail in claims, the application.

It is the purpose only merely for description specific embodiment in term used in this application, is not intended to be limiting the application. It is also intended to including majority in the application and "an" of singulative used in the attached claims, " described " and "the" Form, unless context clearly shows that other meanings.It is also understood that term "and/or" used herein refers to and wraps Containing one or more associated list items purposes, any or all may be combined.

It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the application A little information should not necessarily be limited by these terms.These terms are only used for same type of information being distinguished from each other out.For example, not departing from In the case of the application range, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as One information.Depending on context, word as used in this " if " can be construed to " ... when " or " when ... When " or " in response to determination ".

VXLAN technologies construct virtual two layers on it using existing three layer physical network as Underlay networks Network, i.e. Overlay networks.Overlay networks forward road by encapsulation technology, using three floor that Underlay networks provide Diameter realizes that tenant's two layer message is transmitted across three-layer network between different websites.

For example, being established between the VTEP1 and VTEP4 of Overlay networks has the tunnels VXLAN 1, the reality in the tunnels VXLAN 1 Physics forward-path is made of the VTEP in the networks Underlay.

It is the physics Actual path forwarding schematic diagram in a kind of Underlay networks shown in the application referring to Fig. 1, Fig. 1.

Assuming that the actual physics forward-path in the tunnels VXLAN 1 between VTEP1 and VTEP4 has 4, it is respectively：

VTEP1→VTEP2→VTEP4；

VTEP1→VTEP5→VTEP3→VTEP4；

VTEP1→VTEP5→VTEP4；

VTEP1→VTEP2→VTEP6→VTEP4。

The physics forward-path that the tunnels VXLAN 1 usually between VTEP1 and VTEP4 are given tacit consent to can be according to Routing Protocol meter It obtains.

It is assumed that the physics forward-path in the tunnels VXLAN 1 being calculated according to Routing Protocol be VTEP1 → VTEP5 → VTEP4.Once the calculated physics forward-path of this Routing Protocol forms, upper will generate of VTEP1 forwards with the physics The corresponding route table items 1 in path, should, the purpose IP address of route table items 1 is the IP address of VTEP4, and next-hop is the IP of VTEP5 Address.Then VTEP1 also generates forwarding-table item 1 according to route table items 1, and the purpose IP address of the forwarding-table item 1 is the IP of VTEP4 Address, next-hop are the IP address of VTEP5.

Meanwhile route table items 2 corresponding with the physics forward-path, the purpose of the route table items 2 can be also generated on VTEP5 IP address is the IP address of VTEP4, and next-hop is the IP address of VTEP4.Then, VTEP5 can also be generated according to route table items 2 and be turned Forwarding list item 2, the purpose IP address of the forwarding-table item 2 are the IP address of VTEP4, and next-hop is the IP address of VTEP4.

When VTEP1 receives ether network packet, if the outgoing interface of the matched forwarding-table item of ether network packet is VXLAN When the tunnel face in tunnel 1, which can be carried out VXLAN encapsulation by VTEP1, form VXLAN messages.The VXLAN messages Destination IP be VTEP 4 IP address.

Then, VTEP1 can according to destination IP be VTEP4 IP address forwarding-table item (i.e. forwarding-table item 1) indicated by The VXLAN messages are sent to VTEP5 by next-hop (i.e. the IP address of VTEP5).

After VTEP5 receives VXLAN messages, the purpose IP address that purpose IP address is carried with the VXLAN messages can be searched Identical forwarding-table item 2, the VTEP (i.e. VTEP4) that then VTEP5 can be indicated according to the next-hop of the forwarding-table item 2, by this VXLAN messages are sent to VTEP4.

VTEP1 is exactly to be sent to the ether network packet received by the tunnels VXLAN 1 by above-mentioned retransmission method VTEP4。

However, by taking VTEP1 as an example, VTEP1 route table items have certain ageing time, when ageing time then, if Advertising of route corresponding with the route table items 1 is not received, then VTEP1 can delete the route table items 1.

When the appearance flow congestion on VTEP1 → VTEP5 → paths VTEP4, VTEP1 is difficult to receive and the route table items 1 corresponding advertising of route so that VTEP1 deletes the route table items 1, so that forwarding table corresponding with the route table items 1 Item 1 is also deleted.

When VTEP1 needs to be forwarded above-mentioned packaged VXLAN messages, since forwarding-table item 1 can not be found, So the VXLAN messages can not be forwarded, therefore can be by the VXLAN packet loss.

In view of this, the application proposes a kind of message forwarding method, at least solve the above problems.

It is a kind of flow chart of message forwarding method shown in one exemplary embodiment of the application, the party referring to Fig. 2, Fig. 2 Method can be applied in VTEP equipment, the VTEP device configurations multiple physics forwardings corresponding at least one tunnels VXLAN Path；Wherein, when the VTEP equipment is the head node of the multiple physics forward-path, the method includes may include step 201 to step 203.

Before introducing message forwarding method provided by the present application, several concepts are first introduced.

1) physics forward-path

The tunnels VXLAN built on Overlay networks are configured with and the tunnels pair VXLAN in Underlay networks The actual physics forward-path answered.The physics forward-path is mainly used for forwarding VXLAN messages.

For example, being established between VTEP1 and VTEP4 on Overlay has the tunnels VXLAN 1,1 corresponding reality of the tunnels VXLAN Physics forward-path is the physics forward-path 1 (i.e. VTEP1 → VTEP5 → VTEP4) on Underlay.

When VXLAN messages are sent to VTEP4 by VTEP1 by the tunnels VXLAN 1, the actual physics forward-path of message It is：VXLAN messages are sent to VTEP5 by VTEP1, which is sent to VTEP4 by VTEP5 again.

The tunnels VXLAN can be corresponding with a plurality of actual physics forward-path, wherein a physics forward-path is by road (it will be denoted as by the calculated forward-path of Routing Protocol give tacit consent to physics forward-path here) by the calculated path of agreement, other For non-default physics forward-path.Usually when the source VTEP equipment in the tunnels VXLAN detects routings of the source VTEP to purpose VTEP When reachable, source VTEP equipment can forward the message to purpose by the acquiescence physics forward-path (searching IP forwarding-table items) VTEP.And when source VTEP equipment check source VTEP to purpose VTEP routings it is unreachable when, source VTEP can by packet loss, to It causes to stop.

And be configured in this application, on VTEP the tunnels VXLAN mark and the VXLAN Tunnel Identifiers it is corresponding extremely The correspondence of a few physics forward-path so that source VTEP can neatly select physics forward-path to forward needs The tunnels VXLAN forwarding message, and no longer using only by acquiescence physics forward-path by the way of forward.

Wherein, the correspondence of the VXLAN Tunnel Identifiers and at least one physics forward-path can be in the following way It generates：

Mode one：VTEP can receive the VXLAN Tunnel Identifiers of user configuration and at least one physics forward-path Correspondence.

Mode two：When VTEP is the SDN forwarding units in SDN network, VTEP can receive what SDN controllers issued The correspondence of VXLAN Tunnel Identifiers and at least one physics forward-path.

Message forwarding method provided by the present application is described in detail below down.This method is applied to VTEP, the VTEP equipment It is configured with multiple physics forward-paths corresponding at least one tunnels VXLAN；Wherein, the VTEP equipment is the multiple object When managing the head node of forward-path, the method includes：

Step 201：Receive message；

Here the message received can be the ether network packet received by the AC mouths of this VTEP, naturally it is also possible to be Other kinds of message here only illustratively illustrates message, is not limited specifically it.

Hereafter when introducing method provided by the present application, it is introduced so that the message is ether network packet as an example, here not It repeats again.

Step 202：It is the tunnel in the tunnels target VXLAN in the outgoing interface for determining the matched forwarding-table item of message received When mouth, in the corresponding multiple physics forward-paths in the tunnels the target VXLAN, selection target physics forward-path；The mesh It is any of described at least one tunnels VXLAN to mark the tunnels VXLAN.

When realizing, VTEP can receive ether network packet by local AC mouths.Then VTEP can search target MAC (Media Access Control) address For the forwarding-table item of the target MAC (Media Access Control) address of the ether network packet.When the outgoing interface of the forwarding-table item found is the tunnels VXLAN When the tunnel face of (describing for convenience here, be denoted as the tunnels target VXLAN), VTEP can be corresponding in the tunnels target VXLAN In multiple physics forward-paths, selection target physics forward-path.

It should be noted that the target tunnels VXLAN are at least one tunnels VXLAN configured in this VTEP equipment Any one tunnel VXLAN.

In selection：

Method one：VTEP can arbitrarily select a physics in the corresponding multiple physics forward-paths in the tunnels target VXLAN Forward-path is as target physical forward-path.

Method two：VTEP is unreachable in the routing for determining this VTEP to the purpose VTEP of the tunnels target VXLAN connection When, it is selected differently from the target physical forward-path of the unreachable routing.

When realizing, this VTEP can check that the routing for the purpose VTEP that this VTEP is connected to the tunnels target VXLAN is It is no reachable.

When checking, VTEP can check the routing table for the IP address for the presence or absence of purpose IP address being locally purpose VTEP , and if it exists, the routing for then determining this VTEP to the purpose VTEP of the tunnels target VXLAN connection is reachable.If being not present, really The purpose VTEP of this fixed VTEP to the connection of the tunnels target VXLAN is unreachable.

When this VTEP determines that this VTEP to purpose VTEP is unreachable, this VTEP can be corresponded in the tunnels target VXLAN Multiple physics forward-paths in, be selected differently from the target physical forward-path of the unreachable routing.

Such to be advantageous in that, when the routing of this VTEP to the purpose VTEP of the tunnels VXLAN connection are unreachable, VTEP can With not by the Ethernet packet loss, but the physics forward-path for being selected differently from the unreachable routing forwards the Ethernet report Text, to prevent the interruption of service traffics.

Step 203：According to the target physical forward-path, the first VXLAN after being packaged to the message is forwarded Message；The first VXLAN messages carry the information of the target physical forward-path.

Wherein, the information of above-mentioned target physical forward-path can be the IP address of node on target physical forward-path Etc., only the information of target physical forward-path is illustratively illustrated here, it is not carried out specifically defined.

Below by taking the information of the target physical forward-path is the IP address of node on the target physical forward-path as an example To illustrate.

Step 1：VTEP can be in other nodes on target physical forward-path in addition to this VTEP and terminal note, selection Destination node.

In a kind of mode of selection target node, VTEP can be according to target physical forward-path from head node to whole section The sequence of point, the nearest node of chosen distance terminal note is as destination node.

For example, target physical forward-path is VTEP1 → VTEP2 → VTEP6 → VTEP4.

Node on the target physical forward-path is followed successively by VTEP1, VTEP2, VTEP6 and VTEP4.Wherein, VTEP1 For the head node on the path 2, VTEP4 is the terminal note on the path 2, and VTEP2 and VTEP6 are the middle node on the path 2 Point.

Distance due to VTEP6 apart from terminal note VTEP4 is nearest, so VTEP6 may be selected as destination node in VTEP.

In the mode of another selection target node, VTEP can be removed this VTEP and end on target physical forward-path In other nodes except node, any one node is selected, as destination node.

Here not specifically defined to selecting the destination node to carry out only to the exemplary illustration of selection target node.

Step 2：Whether the routing that VTEP can check this VTEP to the destination node selected is reachable.

When realizing, the routing table of the detectable IP address for the presence or absence of purpose IP address being locally the destination node of VTEP .If it does, the routing for determining this VTEP to the destination node is reachable, if it does not, determining that this VTEP arrives the target section The routing of point is unreachable.

Step 3：When VTEP determine this VTEP to the destination node routing up to when, VTEP can to the ether network packet into Row VXLAN encapsulates to form the first VXLAN messages, and forwards the first VXLAN messages.

The purpose IP address of first VXLAN messages is the IP address of the destination node.

When between the terminal note on destination node and the target physical forward-path there are when intermediate node, described first VXLAN messages carry the intermediate node between the terminal note on the destination node and the target physical forward-path IP address, And the IP address of the terminal note on the target physical forward-path.

When intermediate node is not present between the terminal note on destination node and the target physical forward-path, this first VXLAN messages only carry the IP address of the terminal note on the target physical forward-path.

In addition, VTEP can also set the value of the specific field of the first VXLAN messages to the first preset value, this first Preset value shows to carry the IP address of the node on target physical forward-path in the first VXLAN messages.

Then, VTEP can will according to and the first VXLAN messages the matched forwarding-table item of destination IP, forward this first VXLAN messages.

Wherein, the position of the IP address of the terminal note on the carrying target physical forward-path and the specific field Position can be the first VXLAN messages packaging information.

The packaging information may include VXLAN headers etc., be position and envelope to carrying position, specific field here Dress information is illustratively illustrated, is not carried out to it specifically defined.

Step 4：If the routing that VTEP determines this VTEP to the destination node is unreachable, VTEP can be forwarded in target physical In remaining node on path, in addition to destination node, this VTEP and terminal note, destination node is reselected.

After reselecting out destination node, the repeatable steps 2 that execute of VTEP are to step 4.

Step 204：Determine this VTEP to the tunnels the target VXLAN connection purpose VTEP routing up to when, it is right The message carries out VXLAN encapsulation, forms the 2nd VXLAN messages.

It is the flow chart of another message forwarding method shown in one exemplary embodiment of the application referring to Fig. 3, Fig. 3, it should Method can be applied in VTEP equipment, and corresponding at least one tunnels the VXLAN multiple physics of the VTEP device configurations turn Send out path；Wherein, the VTEP equipment be multiple physics forward-paths on non-head node, the method includes the steps 301 to Step 304.The non-head node includes the intermediate node and terminal note between head node and terminal note.

Step 301：Receive the first VXLAN sent out by the head node on the corresponding target physical forward-path in target tunnel Message；The tunnels the target VXLAN are the corresponding tunnels VXLAN of the first VXLAN messages；The target physical forward-path It is the physics forward-path that the head node is selected from the corresponding a plurality of physics forward-path in the tunnels the target VXLAN.

Step 302：After determining the IP address that the purpose IP address of the first VXLAN messages is this VTEP, institute is checked State the information whether the first VXLAN messages carry target physical forward-path；

When realizing, VTEP is determining that the purpose IP address of the first VXLAN messages carrying is the IP address of this VTEP, VXLAN decapsulations can be carried out to the first VXLAN messages, obtain packaging information and packed message.The packed report Text can be ether network packet, can also be other kinds of message, only illustratively illustrate here, not packed to this Message carries out specifically defined.

It is illustrated so that packed message is ether network packet as an example below.

VTEP can check the value of the specific field of the first VXLAN messages.

For example, the specific field is the field in the first VXLAN message packaging informations, at this point, VTEP can check the envelope Fill the value of the specific field in information；The packaging information may include the VXLAN heads of the first VXLAN messages, IP, UDP heads Etc..This only illustratively illustrates the position of specific field, is not carried out to it specifically defined.

If the value of the specific field is the first preset value, determine that the first VXLAN messages carry target physical and turn Send out the IP address of the node on path；

If the value of the specific field of the packaging information is the second preset value, determine in the 2nd VXLAN messages not Carry the IP address of the node on target physical forward-path.

Wherein, the first preset value indicates that the packaging information of the 2nd VXLAN messages carries on target physical forward-path The IP address of node；

Second preset value indicates that the packaging information of the 2nd VXLAN messages does not carry the node on target physical forward-path IP address.

It should be noted that the IP address of the node on target physical forward-path can be carried on the first VXLAN messages Packaging information, as the first VXLAN messages VXLAN headers in, here only to carry target physical forward-path on node The position of IP address illustratively illustrated, it is not carried out specifically defined.

Step 303：If carried, according to the information of the target physical forward-path, to the first VXLAN messages Message after decapsulation re-starts VXLAN encapsulation, forms the 2nd VXLAN messages and forwards.

When realizing, after determining that the first VXLAN messages carry the IP address of node on target physical forward-path, this Whether the routing that VTEP can detect the terminal note on this VTEP to the target physical forward-path is reachable.

When detecting, this VTEP can detect whether there are purpose IP address be the terminal note IP address route table items, If it does, determining that the routing of the terminal note on this VTEP to the target physical forward-path is reachable.If being not present, this is determined The routing of terminal note on VTEP to the target physical forward-path is unreachable.

In addition, this VTEP can also be by the quantity of node on the physics forward-path of the first VXLAN messages carrying come really It is fixed to whether there is intermediate node between this VTEP and the terminal note.

For example, the IP address of a node when the carrying of the first VXLAN messages, then show between this VTEP and the terminal note Intermediate node is not present, the first VXLAN messages only carry the IP address of the terminal note.When the first VXLAN messages are taken The IP address of multiple nodes of band then shows that there are intermediate nodes between this VTEP and the terminal note.

1) when the routing for determining the terminal note on this VTEP to the target physical forward-path is unreachable and this VTEP is arrived There are when intermediate node between the terminal note, from removing on the target physical forward-path that the first VXLAN messages carry In node except terminal note, selection target node；

When determining that this VTEP is reachable to destination node routing, the ether after being decapsulated to the first VXLAN messages Network packet re-starts VXLAN encapsulation, forms the 2nd VXLAN messages and forwards；

The value of the specific field of the 2nd VXLAN messages is the first preset value, the first preset value mark second VXLAN messages carry the IP address of node on target physical forward-path.

2) when the routing for determining the terminal note on this VTEP to the target physical forward-path up to when, to this first Message after the decapsulation of VXLAN messages re-starts VXLAN encapsulation, forms the 3rd VXLAN messages；

Wherein, the purpose IP address of the 3rd VXLAN messages is the IP address of the terminal note；3rd VXLAN Message does not carry the IP address of node on target physical forward-path.

3) when the routing for determining this VTEP to the destination node is unreachable, then from the target of the first VXLAN messages carrying In other nodes in addition to terminal note, the inaccessible destination node on physics forward-path, destination node is reselected. Whether the routing for detecting the destination node that this VTEP is reselected to this again is reachable.

If the routing of this VTEP to all nodes that the first VXLAN messages carry is all unreachable, by the first VXLAN Packet loss.

4) when the routing for determining the terminal note on this VTEP to the target physical forward-path is unreachable and this VTEP is arrived When intermediate node being not present between the terminal note, then the Ethernet packet loss after decapsulating the first VXLAN.

Step 304：If do not carried, the first VXLAN messages are decapsulated, and to the message after decapsulation into Row forwarding.

By foregoing description it can be seen that:

In a first aspect, when VTEP receive after the message forwarded by tunnel, no longer by the tunnel it is corresponding, by road The acquiescence physics forward-path calculated by agreement forwards the message, but is selected in the corresponding a plurality of physics forward-path in the tunnel It selects a physics forward-path and forwards the message, on the one hand, reduce the congestion for acquiescence physics forward-path；Another party The selection in face, the physics forward-path when VTEP is E-Packeted by tunnel is more flexible.

Second aspect, when VTEP determines this VTEP to the unreachable (roads Ji You of routing of the purpose VTEP of the tunnels VXLAN connection It is unavailable to purpose VTEP physics forward-paths by calculated VTEP of agreement) when, VTEP can not will be waited for through VXLAN tunnels The packet loss of road forwarding, but from physics forwarding route table, search the physics forward-path different from the unreachable routing The message is forwarded, to prevent the interruption of service traffics.

The third aspect, the application extend the VXLAN headers of VXLAN messages so that can be taken in VXLAN messages IP address and the application with the node on physics forward-path are also improved the forwarding process of VXLAN messages.

After VTEP receives VXLAN messages, if the purpose IP address of the VXLAN messages is the IP address of this VTEP, The VXLAN messages are subjected to VXLAN decapsulations.And further check whether the VXLAN messages carry on physics forward-path Node IP address, if carry, may be selected destination node, and by the message after decapsulation re-start VXLAN encapsulation, encapsulation The purpose IP address of VXLAN messages afterwards is the IP address of destination node.Then this rear VXLAN messages are Resealed again to carry out Forwarding, until the VXLAN messages are forwarded to terminal note.This allows for the premise of the forwarding table on not changing each VTEP Under, so that it may the VXLAN messages to be forwarded along the physics forward-path separately configured for the tunnels VXLAN.

Fourth aspect, the forwarding process of the application VXLAN messages are different from the existing forwarding process of VXLAN messages.

In existing way, after the intermediate node between this VTEP and purpose VTEP receives VXLAN messages, directly to this VXLAN messages carry out forwarding of tabling look-up, without being packaged reconciliation encapsulation operation to the VXLAN messages.

And in this application, after the intermediate node between this VTEP and purpose VTEP receives VXLAN messages, if should The purpose IP address of VXLAN messages is the IP address of this node, then is decapsulated to the VXLAN messages, and target section may be selected Point, then encapsulation is re-started to VXLAN messages, then forward again.

It is the physics Actual path forwarding signal in another Underlay networks shown in the application referring to Fig. 4, Fig. 4 Figure.

Below by specifically example and Fig. 4 is combined, message forwarding method provided by the present application is described in detail.

First, the group-network construction of lower the application and the physics forwarding route table of the application proposition are introduced.

Assuming that being established between VTEP41 and VTEP44 has the tunnels VXLAN 41, VTEP41 to be connected with subscriber's main station VM41, VTEP44 is connected with subscriber's main station VM42.

Assuming that the IP address of VTEP41 is 1.1.1.1, the IP address of VTEP44 is 4.4.4.4, then the source in the tunnels VXLAN 41 IP address is 1.1.1.1, purpose IP address 4.4.4.4.

It is assumed that be physics forward-path 1 by the acquiescence physics forward-path in the calculated tunnels VXLAN of Routing Protocol 41, Node is followed successively by VTEP41, VTEP43, VTEP44 on the physics forward-path 1.Wherein, VTEP41 is head node, and VTEP43 is Intermediate node, VTEP44 are terminal note.

Meanwhile the Tunnel Identifier in the tunnels VXLAN, pass corresponding at least one physics forward-path are also configured on VTEP41 System.

For example, being configured with the tunnels VXLAN 41 is corresponding with physics forward-path 1, physics forward-path 2 and physics forward-path 3。

Wherein, the node on the physics forward-path 2 is followed successively by VTEP41, VTEP42, VTEP46 and VTEP44.Its In, VTEP41 is the head node on the path 2, and VTEP44 is the terminal note on the path 2, and VTEP42 and VTEP46 are the path Intermediate node on 2.Wherein, the IP address of VTEP42 is 2.2.2.2, and the IP address of VTEP46 is 6.6.6.6.

Node on physics forward-path 3 is followed successively by VTEP41, VTEP45 and VTEP44.

The correspondence can generate in the following way：

Mode one：VTEP41 can receive the VXLAN Tunnel Identifiers of user configuration and at least one physics forward-path Correspondence.

Mode two：When VTEP41 is the SDN forwarding units in SDN network, VTEP41 can receive what SDN controllers issued The correspondence of VXLAN Tunnel Identifiers and at least one physics forward-path.

For example, VTEP41 can receive the tunnels VXLAN 41 that SDN controllers issue and physics forward-path 1, physics forwarding The correspondence in path 2 and physics forward-path 3.

Secondly, the message forwarding method of the application proposition is introduced.

The application extends the VXLAN headers of VXLAN messages so that VXLAN headers can carry the mesh selected The IP address of the node on physics forward-path is marked, and carries and is used to indicate whether VXLAN headers carry target physical forwarding The specific field of the IP address of node on path.When the value of the specific field is the first preset value, show that the VXLAN is reported Head carries the IP address of node on target physical forward-path, when the value of the specific field is the second preset value, shows The VXLAN headers do not carry the IP address of node on target physical forward-path.

In this application, it is assumed that the first preset value is 1, and the second preset value is 0.

Assuming that VM41 will send message to VM42.

Ether network packet can be sent to VTEP41 by VM41.After VTEP41 receives the ether network packet, can search with The matched forwarding-table item of target MAC (Media Access Control) address of the ether network packet.

When the outgoing interface of the forwarding-table item found is AC mouthful of local, VTEP41 according to by AC mouthfuls of the local forward this with Too network packet.

If the outgoing interface of the forwarding-table item found is the tunnel face in the tunnels VXLAN 1, VTEP41 can be in the VXLAN tunnels Selection target physics forward-path in the corresponding multiple physics forward-paths in road 1.

Method one：VTEP41 can be in the corresponding multiple physics forward-paths in the tunnels VXLAN 1, arbitrary selection one Physics forward-path, as target physical forward-path.

Mode two：The routing for the purpose VTEP (i.e. VTEP44) that the tunnels VTEP41 to VXLAN 1 connect is determined in VTEP41 not When reachable, it is selected differently from the physics forward-path of the unreachable routing (i.e. physics forward-path 1), is forwarded as target physical Path.

When realizing, VTEP41 can check the routing for the purpose VTEP (i.e. VTEP44) that the tunnels VTEP41 to VXLAN 1 connect It is whether reachable.

When checking, VTEP41 can detect whether that there are the route table items for the IP address that purpose IP address is VTEP44, if In the presence of, it is determined that the routing of VTEP41 to VTEP44 is reachable.If being not present, it is determined that the routing of VTEP41 to VTEP44 can not It reaches.

When detecting that the routing of VTEP41 to VTEP44 is unreachable, VTEP41 can turn in 1 corresponding physics of the tunnels VXLAN It sends out in path 1, physics forward-path 2 and physics forward-path 3, is selected differently from the target physical forwarding of physics forward-path 1 Path.In the present example it is assumed that the target physical forward-path selected is physics forward-path 2.

According to the sequence of the physics forward-path 2 from head node to terminal note, the node on the physics forward-path 2 is successively For VTEP41, VTEP42, VTEP46 and VTEP44.Wherein, VTEP41 is the head node on the path 2, and VTEP44 is the road Terminal note on diameter 2, VTEP42 and VTEP46 are the intermediate node on the path 2.

Then, mesh is selected in node that VTEP41 can be on the physics forward-path 2, in addition to this VTEP and VTEP44 Mark node (i.e. the selection target node in VTEP42 and VTEP46).

In a kind of mode for choosing destination node, VTEP41 can be according to physics forward-path 2 from head node to whole section The sequence of point, the preferentially node nearest apart from terminal note VTEP44.For example, VTEP46 is near VTEP44, it is possible to select VTEP46 is as destination node.

In another mode for choosing destination node, VTP41 can select any one in VTEP42 and VTEP46 Node is as destination node.

Select VTEP46 as illustrating for destination node using VTEP41.

After selecting destination node, VTEP41 can check whether the routing of VTEP41 to VTEP46 is reachable.

When checking, VTEP41 can check the routing table for the IP address for the presence or absence of purpose IP address being locally VTEP46 , if it does, determining that the routing of VTEP41 to VTEP46 is reachable, if being not present, determine the routing of VTEP41 to VTEP46 not It is reachable.

When determine the routing of VTEP41 to VTEP46 up to when, VTEP41 can carry out VXLAN envelopes to the ether network packet 1 Dress forms VXLAN messages 2.The purpose IP address of the VXLAN messages 2 is the IP address of VTEP46.The VXLAN of VXLAN messages 2 The IP address of the IP address and terminal note of the intermediate node between destination node and terminal note is also carried in header, or The IP address of terminal note is only carried in the VXLAN headers of VXLAN messages 2.

In this example, due to there is no intermediate node between VTEP46 and VTEP44, so the VXLAN headers of VXLAN messages 2 In carry the IP address of terminal note VTEP44 on physics forward-path 2.Meanwhile VTEP41 can also be by VXLAN messages 2 The value of specific field in VXLAN headers is set as 1.

Then, VTEP41 can according to the matched forwarding-table item of the purpose IP address of the VXLAN messages 2, to the VXLAN report Text 2 is forwarded.

When VTEP46 determines that the routing of VTEP41 to VTEP46 is unreachable, VTEP41 can (i.e. physics turns in remaining node On hair path 2, node in addition to this VTEP, terminal note and VTEP46) in reselect destination node.And according to above-mentioned The step of for VTEP46, checks whether the routing of VTEP41 to the destination node reselected is reachable and reachable routeing When forward ether network packet operation.

If the routing of all nodes on VTEP41 to the physics forward-path 2 is unreachable, by the ether network packet 1 It abandons.

In the present example it is assumed that the routing of VTEP41 to VTEP46 is reachable, VTEP41 can be through the above way by above-mentioned VXLAN Message 2 has been sent to VTEP46.

In the embodiment of the present application, when VTEP41 detect the routing of VTEP41 to VTEP44 up to when, VTEP41 can be right The ether network packet carries out VXLAN encapsulation, forms VXLAN messages 1.The purpose IP address of the VXLAN messages 1 is the IP of VTEP44 The value of address, the specific field in the VXLAN heads of the VXLAN messages 1 is 0.Task physics is not carried in the VXLAN messages 1 The IP address of node on forward-path.

After VTEP46 receives the VXLAN messages 2, it can check whether the purpose IP address of VXLAN messages 2 is this VTEP IP address.

If the purpose IP address of VXLAN messages 2 is not the IP address of this VTEP, VTEP46 can be searched to be reported with the VXLAN The matched forwarding-table item of destination IP of text 2, is then forwarded the VXLAN messages 2 according to the forwarding-table item found.

In this example, the purpose IP address of VXLAN messages 2 is the IP address of this VTEP, so VTEP46 can be to the VXLAN Message 2 carries out VXLAN decapsulations, obtains the packaging informations such as VXLAN headers, and packed ether network packet 1.

VTEP46 can check the value of the specific field of the VXLAN headers of VXLAN messages 2.In this example, VXLAN messages 2 VXLAN headers value be 1, VTEP46 can determine the IP that the node on physics forward-path 2 is carried in the VXLAN headers Address.

Then, whether the routing that VTEP46 can check VTEP46 to terminal note (i.e. VTEP44) is reachable, and checks Whether VTEP46 has intermediate node between the terminal note (i.e. VTEP44).

If the routing of VTEP46 to terminal note is unreachable, and there are intermediate nodes between the terminal note by VTEP46, then exist Selection target node in the node in addition to terminal note is carried in the VXLAN headers of the VXLAN messages 2.

If it is determined that when VTEP46 route reachable to the destination node that the selection goes out, VXLAN envelopes are carried out to the ether network packet 1 Dress forms VXLAN messages 3.

The purpose IP address of the VXLAN messages 3 is the IP address of the destination node, which also carries target The IP address and terminal note IP address of intermediate node between node and the terminal note；Or the VXLAN messages 3 only carry The IP address of terminal note.The value of 3 specific field of VXLAN messages is 1.

If VTEP46 is unreachable to the destination node routing selected, VTEP46 can be carried in the VXLAN messages 3 again Other nodes in addition to terminal note, the destination node selected in, reselect destination node, and detect VTEP46 to weight Whether the routing for the destination node newly selected is reachable.

If the routing of VTEP46 to terminal note is reachable, VXLAN encapsulation will be carried out to the ether network packet 1, and form VXLAN Message 4.The destination address of the VXLAN messages 4 is the IP address of the terminal note, which does not carry physics forward-path The value of the IP address of any node on 2,4 specific field of VXLAN messages is 0.

If the routing of VTEP46 to terminal note is unreachable, and there is no intermediate nodes between the terminal note by VTEP46, then Ether network packet 1 is abandoned.

In this example, if VTEP46 to VTEP44 routings are reachable, VTEP46 carries out VXLAN envelopes to the ether network packet 1 Dress forms VXLAN messages 4.The purpose IP address of the VXLAN messages 4 is the IP address of VTEP44.The VXLAN of VXLAN messages 4 The IP address of the node on physics forward-path 2 is not carried in header.VTEP46 can report the VXLAN of the VXLAN messages 4 at this time The value of specific field in front is 0.

Then, VTEP46 can search the forwarding-table item for the IP address that purpose IP address is VXLAN messages 4, then according to this Forwarding-table item is forwarded VXLAN messages 3.

If the routing of VTEP46 to VTEP44 is unreachable, due to only being carried in the VXLAN headers of VXLAN messages 2 The IP address of VTEP44, so intermediate node is not present between can determine VTEP46 to VTEP44 in VTEP46.At this point, VTEP46 can The ether network packet 1 is abandoned.

In the present example it is assumed that VXLAN messages 4 have been sent to VTEP44 by VTEP46.

After VTEP44 receives the VXLAN messages 4, it can check whether the purpose IP address of VXLAN messages 4 is VTEP44 IP address.In this example, the purpose IP address of VXLAN messages 4 is the IP address of VTEP44.VTEP44 can report the VXLAN Text 4 carries out VXLAN decapsulations, obtains the packaging informations such as the VXLAN headers of VXLAN messages 4 and ether network packet 1.

Then, VTEP44 can check the value of the specific field in the VXLAN headers of VXLAN messages 4, in this example, The value of specific field in the VXLAN headers of VXLAN messages 4 is in the VXLAN headers that 0, VTEP44 determines VXLAN messages 4 The node IP address on physics forward-path 2 is not carried.At this point, it is the ether network packet 1 that VTEP44, which can search target MAC (Media Access Control) address, Then the forwarding-table item of the MAC Address of carrying is forwarded the ether network packet 1 according to the forwarding-table item.

By foregoing description it can be seen that:

In a first aspect, when VTEP41 receive after the message forwarded by tunnel, no longer by the tunnel it is corresponding, by The physics forward-path 1 that Routing Protocol calculates forwards the message, but is selected in the corresponding a plurality of physics forward-path in the tunnel It selects a physics forward-path and forwards the message, on the one hand, reduce the congestion for physics forward-path 1；On the other hand, exist The selection of physics forward-path when VTEP is E-Packeted by tunnel is more flexible.

Second aspect, when VTEP41 determine the routing of VTEP41 and VTEP44 it is unreachable (i.e. by Routing Protocol it is calculated VTEP41 and VTEP44 physics forward-paths are unavailable) when, VTEP11 can not by Ethernet packet loss to be forwarded, but The physics forward-path 2 for being selected differently from physics forward-path 1 forwards the ether network packet, to prevent in service traffics It is disconnected.

After VTEP receives VXLAN messages, if the purpose IP address of the VXLAN messages is the IP address of this VTEP, The VXLAN messages are subjected to VXLAN decapsulations.And further check whether the VXLAN headers of the VXLAN messages carry physics Node IP address on forward-path, if it carries, selection target node, and the ether network packet after decapsulation re-starts VXLAN is encapsulated, and the purpose IP address of the VXLAN messages after encapsulation is the IP address of destination node.Then again by the VXLAN messages It is forwarded, until the VXLAN messages are forwarded to terminal note.Before this allows for the forwarding table on not changing each VTEP It puts, so that it may the VXLAN messages to be forwarded along the physics forward-path 2 separately configured for the tunnels VXLAN 1.

In existing way, after the intermediate node between VTEP41 and VTEP44 receives VXLAN messages, directly to this VXLAN messages carry out forwarding of tabling look-up, without being packaged reconciliation encapsulation operation to the VXLAN messages.

And in this application, after the intermediate node between VTEP41 and VTEP44 receives VXLAN messages, if the VXLAN The purpose IP address of message is the IP address of this node, then is decapsulated to the VXLAN messages, and selection target section again Point, then encapsulation is re-started to VXLAN messages, then forward again.

Referring to Fig. 5, the application also provides a kind of hardware architecture diagram of message forwarding method place VTEP, which includes： Communication interface 501, processor 502, memory 503 and bus 504；Wherein, communication interface 501, processor 502 and memory 503 complete mutual communication by bus 504.

Wherein, processor 502 can be a CPU, and memory 503 can be nonvolatile memory (non- Volatile memory), and the logical order of message forwarding is stored in memory 503, processor 502 can be executed and be deposited The logical order of the message forwarding stored in reservoir 503, to realize the function of preventing cutout.

So far, hardware configuration description shown in fig. 5 is completed.

It is a kind of apparatus for forwarding message corresponding with Fig. 5 shown in one exemplary embodiment of the application referring to Fig. 6, Fig. 6 Block diagram.The device is applied to VTEP, and the VTEP device configurations multiple physics corresponding at least one tunnels VXLAN forward road Diameter；Wherein, when the VTEP equipment is the head node of the multiple physics forward-path, it may include unit as follows.

Receiving unit 601, for receiving message；

Selecting unit 602, for being target VXLAN tunnels in the outgoing interface for determining the matched forwarding-table item of message received When the tunnel face in road, in the corresponding multiple physics forward-paths in the tunnels the target VXLAN, selection target physics forwards road Diameter；The tunnels the target VXLAN are any of described at least one tunnels VXLAN；

Retransmission unit 603, for according to the target physical forward-path, forwarding the message is packaged after the One VXLAN messages；The first VXLAN messages carry the information of the target physical forward-path.

Optionally, the selecting unit 602, in the corresponding multiple physics forward-paths in the tunnels the target VXLAN, choosing When selecting target physical forward-path, specifically for determining purpose VTEPs of this VTEP to the connection of target VXLAN tunnels When routeing unreachable, it is selected differently from the target physical forward-path of the unreachable routing.

The retransmission unit 603 is specifically used on the target physical forward-path in addition to this VTEP and terminal note Other nodes in, selection target node；Determine this VTEP to the destination node routing up to when, the message is sealed The first VXLAN messages are dressed up, and forward the first VXLAN messages；Wherein, the purpose IP address of the first VXLAN messages For the IP of the destination node；The first VXLAN messages carry on the destination node and the target physical forward-path The IP address of the IP address of intermediate node between terminal note and the terminal note on the target physical forward-path；Or institute State the IP address for the terminal note that the first VXLAN messages only carry on target physical forward-path.

Optionally, described device includes：

Setting unit 604, for setting the value of the specific field of the first VXLAN messages to the first preset value； First preset value indicates that the first VXLAN messages carry the IP address of the node on the target physical forward-path.

Optionally, the retransmission unit 603 is additionally operable in the mesh for determining this VTEP to the connection of the tunnels the target VXLAN VTEP routing up to when, to the message carry out VXLAN encapsulation, formed the 2nd VXLAN messages；Wherein, the 2nd VXLAN is reported The purpose IP address of text is the IP address of the purpose VTEP；The value of the preset field of the 2nd VXLAN messages is second Preset value；Second preset value indicates the 2nd VXLAN messages with not carrying the IP of the node on any physics forward-path Location.

Referring to Fig. 7, the hardware architecture diagram of VTEP, the VTPE packets where the application also provides another message forwarding method It includes：Communication interface 701, processor 702, memory 703 and bus 704；Wherein, communication interface 701, processor 702 and storage Device 703 completes mutual communication by bus 704.

Wherein, processor 702 can be a CPU, and memory 703 can be nonvolatile memory (non- Volatile memory), and the logical order of message forwarding is stored in memory 703, processor 702 can be executed and be deposited The logical order of the message forwarding stored in reservoir 703, to realize the function of preventing cutout.

So far, hardware configuration description shown in Fig. 7 is completed.

It is a kind of apparatus for forwarding message corresponding with Fig. 7 shown in one exemplary embodiment of the application referring to Fig. 8, Fig. 8 Block diagram.The device is applied to VTEP, the VTEP device configurations multiple physics forwardings corresponding at least one tunnels VXLAN Path；Wherein, the VTEP equipment is the non-head node on multiple physics forward-paths, and described device may include list as follows Member.

Receiving unit 801 is sent out for receiving by the head node on the corresponding target physical forward-path in target tunnel First VXLAN messages；The tunnels the target VXLAN are the corresponding tunnels VXLAN of the first VXLAN messages；The object Reason forward-path is the physics that the head node is selected from the corresponding a plurality of physics forward-path in the tunnels the target VXLAN Forward-path；

Inspection unit 802, for determining that the purpose IP address of the first VXLAN messages is the IP address of this VTEP Afterwards, check whether the first VXLAN messages carry the information of target physical forward-path；

Retransmission unit 803, if for carrying, according to the information of the target physical forward-path, to described first Message after the decapsulation of VXLAN messages re-starts VXLAN encapsulation, forms the 2nd VXLAN messages and forwards.

Optionally, the inspection unit 802 is specifically used for checking the value of the specific field of the first VXLAN messages； If the value of the specific field of the first VXLAN messages is the first preset value, determine that the first VXLAN messages carry target The information of physics forward-path；If the value of the specific field of the first VXLAN messages is the second preset value, described is determined One VXLAN messages do not carry the information of target physical forward-path.

The retransmission unit 803 is specifically used for when the terminal note on determining this VTEP to the target physical forward-path Routing is unreachable and this VTEP between the terminal note from the first VXLAN messages to, there are when intermediate node, carrying In the node in addition to terminal note on target physical forward-path, selection target node；Determining this VTEP to the target Node-routing up to when, to the first VXLAN messages decapsulate after message re-start VXLAN encapsulation, formed the 2nd VXLAN Message simultaneously forwards；Wherein, the purpose IP address of the 2nd VXLAN messages is the destination node IP address；Described second VXLAN messages carry the IP address of the intermediate node between the destination node and the terminal note and the terminal note IP address；Or the 2nd VXLAN messages only carry the IP address of the terminal note；The 2nd VXLAN messages are specified The value of field is the first preset value；First preset value identifies the 2nd VXLAN messages and carries target physical forward-path The IP address of upper node.

Optionally, the retransmission unit 803, also particularly useful for when on determining this VTEP to the target physical forward-path Terminal note routing up to when, the message after being decapsulated to the first VXLAN messages re-starts VXLAN encapsulation, forms the Three VXLAN messages；Wherein, the purpose IP address of the 3rd VXLAN messages is the IP address of the terminal note；The third VXLAN messages do not carry the IP address of node on target physical forward-path；The specific field of the 3rd VXLAN messages takes Value is the second preset value, and second preset value indicates that the 3rd VXLAN messages do not carry and saved on the target physical forward-path The IP address of point.

Optionally, the retransmission unit 803, if being additionally operable to the first VXLAN messages does not carry target physical forwarding The information in path then decapsulates the first VXLAN messages, and is forwarded to the message after decapsulation.

The function of each unit and the realization process of effect specifically refer to and correspond to step in the above method in above-mentioned apparatus Realization process, details are not described herein.

For device embodiments, since it corresponds essentially to embodiment of the method, so related place is referring to method reality Apply the part explanation of example.The apparatus embodiments described above are merely exemplary, wherein described be used as separating component The unit of explanation may or may not be physically separated, and the component shown as unit can be or can also It is not physical unit, you can be located at a place, or may be distributed over multiple network units.It can be according to actual It needs that some or all of module therein is selected to realize the purpose of application scheme.Those of ordinary skill in the art are not paying In the case of going out creative work, you can to understand and implement.

The foregoing is merely the preferred embodiments of the application, not limiting the application, all essences in the application With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of the application protection god.

Claims

1. a kind of message forwarding method, which is characterized in that the method is applied to VTEP, the VTEP device configurations at least The corresponding multiple physics forward-paths in one tunnel VXLAN；Wherein, the VTEP equipment is the multiple physics forward-path When head node, the method includes：

Receive message；

When the outgoing interface for determining the matched forwarding-table item of message received is the tunnel face in the tunnels target VXLAN, described In the corresponding multiple physics forward-paths in the tunnels target VXLAN, selection target physics forward-path；The tunnels the target VXLAN For any of described at least one tunnels VXLAN；

According to the target physical forward-path, the first VXLAN messages after being packaged to the message are forwarded；Described first VXLAN messages carry the information of the target physical forward-path.

2. according to the method described in claim 1, it is characterized in that, described in the corresponding multiple objects in the tunnels the target VXLAN It manages in forward-path, selection target physics forward-path, including：

When the routing for determining this VTEP to the purpose VTEP of the tunnels target VXLAN connection is unreachable, it is selected differently from this The target physical forward-path of unreachable routing.

3. method according to claim 1 or 2, which is characterized in that the information of the target physical forward-path includes mesh Mark the IP address of the node on physics forward-path；

It is described to forward the first VXLAN messages after being packaged to the message according to the target physical forward-path, it wraps It includes：

In other nodes on the target physical forward-path in addition to this VTEP and terminal note, selection target node；

Determine this VTEP to the destination node routing up to when, the message is packaged into the first VXLAN messages, and turn Send out the first VXLAN messages described；

Wherein, the purpose IP address of the first VXLAN messages is the IP of the destination node；The first VXLAN messages Carry the IP address and the target of the intermediate node between the terminal note on the destination node and the target physical forward-path The IP address of terminal note on physics forward-path；

4. according to the method described in claim 3, it is characterized in that, the method further includes：

Set the value of the specific field of the first VXLAN messages to the first preset value；First preset value indicates the One VXLAN messages carry the IP address of the node on the target physical forward-path.

5. according to the method described in claim 1, it is characterized in that, when the VTEP is the SDN forwarding units in SDN network When, the corresponding multiple physics forward-paths at least one tunnels VXLAN configure in the following way：

Receive the correspondence of multiple physics forward-paths of VXLAN Tunnel Identifiers and pre-configuration that SDN controllers issue.

6. according to the method described in claim 2, it is characterized in that, the method further includes：

Determine this VTEP to the tunnels the target VXLAN connection purpose VTEP routing up to when, to the message carry out VXLAN is encapsulated, and forms the 2nd VXLAN messages；

Wherein, the purpose IP address of the 2nd VXLAN messages is the IP address of the purpose VTEP；The 2nd VXLAN messages The value of preset field is the second preset value；Second preset value indicates that the 2nd VXLAN messages do not carry any physics and turn Send out the IP address of the node on path.

7. a kind of message forwarding method, which is characterized in that the method is applied to VTEP, the VTEP device configurations at least The corresponding multiple physics forward-paths in one tunnel VXLAN；Wherein, the VTEP equipment is non-on multiple physics forward-paths Head node, the method includes：

Receive the first VXLAN messages sent out by the head node on the corresponding target physical forward-path in target tunnel；The mesh It is the corresponding tunnels VXLAN of the first VXLAN messages to mark the tunnels VXLAN；The target physical forward-path is the cephalomere The physics forward-path that point is selected from the corresponding a plurality of physics forward-path in the tunnels the target VXLAN；

After determining the IP address that the purpose IP address of the first VXLAN messages is this VTEP, the first VXLAN reports are checked Whether text carries the information of target physical forward-path；

If carried, according to the information of the target physical forward-path, the report after being decapsulated to the first VXLAN messages Text re-starts VXLAN encapsulation, forms the 2nd VXLAN messages and forwards.

8. checking whether the first VXLAN messages carry mesh the method according to the description of claim 7 is characterized in that described The information of physics forward-path is marked, including：

Check the value of the specific field of the first VXLAN messages；

If the value of the specific field of the first VXLAN messages is the first preset value, determine that the first VXLAN messages carry The information of target physical forward-path；

If the value of the specific field of the first VXLAN messages is the second preset value, determine that the first VXLAN messages are not taken Information with target physical forward-path.

9. the method according to the description of claim 7 is characterized in that the information of the target physical forward-path is the target The IP address of node on physics forward-path；

The information according to the target physical forward-path, the message after being decapsulated to the first VXLAN messages is again VXLAN encapsulation is carried out, the 2nd VXLAN messages are formed and is forwarded, including：

When the routing for determining the terminal note on this VTEP to the target physical forward-path is unreachable and this VTEP arrives the end There are when intermediate node between node, terminal note is removed from the target physical forward-path that the first VXLAN messages carry Except node in, selection target node；

When determining that this VTEP is reachable to destination node routing, the message after being decapsulated to the first VXLAN messages is again VXLAN encapsulation is carried out, the 2nd VXLAN messages are formed and is forwarded；

The 2nd VXLAN messages carry the intermediate node between the destination node and the terminal note IP address and The IP address of the terminal note；Or the 2nd VXLAN messages only carry the IP address of the terminal note；

The value of the specific field of the 2nd VXLAN messages is the first preset value；First preset value identifies the 2nd VXLAN Message carries the IP address of node on target physical forward-path.

10. according to the method described in claim 9, it is characterized in that, the information according to the target physical forward-path, Message after being decapsulated to the first VXLAN messages re-starts VXLAN encapsulation, forms the 2nd VXLAN messages and forwards, also Including：

When the routing for determining the terminal note on this VTEP to the target physical forward-path up to when, to the first VXLAN report Message after text decapsulation re-starts VXLAN encapsulation, forms the 3rd VXLAN messages；

Wherein, the purpose IP address of the 3rd VXLAN messages is the IP address of the terminal note；The 3rd VXLAN messages The IP address of node on target physical forward-path is not carried；

The value of the specific field of the 3rd VXLAN messages is the second preset value, and second preset value indicates the third VXLAN messages do not carry the IP address of node on the target physical forward-path.

11. the method according to the description of claim 7 is characterized in that the method further includes：

If the first VXLAN messages do not carry the information of target physical forward-path, to the first VXLAN messages into Row decapsulation, and the message after decapsulation is forwarded.

12. a kind of apparatus for forwarding message, which is characterized in that described device is applied to VTEP, the VTEP device configurations with extremely Few corresponding multiple physics forward-paths in a tunnel VXLAN；Wherein, the VTEP equipment is the multiple physics forward-path Head node when, described device includes：

Receiving unit, for receiving message；

Selecting unit, for being the tunnel in the tunnels target VXLAN in the outgoing interface for determining the matched forwarding-table item of message received When road junction, in the corresponding multiple physics forward-paths in the tunnels the target VXLAN, selection target physics forward-path；It is described The tunnels target VXLAN are any of described at least one tunnels VXLAN；

Retransmission unit, for according to the target physical forward-path, forwarding the first VXLAN after being packaged to the message Message；The first VXLAN messages carry the information of the target physical forward-path.

13. device according to claim 12, which is characterized in that the selecting unit, in the tunnels pair the target VXLAN In the multiple physics forward-paths answered, when selection target physics forward-path, specifically for determining that this VTEP arrives the target When the routing of the purpose VTEP of the tunnels VXLAN connection is unreachable, it is selected differently from the target physical forwarding road of the unreachable routing Diameter.

14. device according to claim 12 or 13, which is characterized in that the information of the target physical forward-path includes The IP address of node on target physical forward-path；

The retransmission unit is specifically used on the target physical forward-path other sections in addition to this VTEP and terminal note In point, selection target node；Determine this VTEP to the destination node routing up to when, the message is packaged into first VXLAN messages, and forward the first VXLAN messages；Wherein, the purpose IP address of the first VXLAN messages is the mesh With marking the IP of node；The first VXLAN messages carry the terminal note on the destination node and the target physical forward-path it Between intermediate node IP address and the terminal note on the target physical forward-path IP address；Or described first VXLAN messages only carry the IP address of the terminal note on target physical forward-path.

15. a kind of apparatus for forwarding message, which is characterized in that described device is applied to VTEP, the VTEP device configurations with extremely Few corresponding multiple physics forward-paths in a tunnel VXLAN；Wherein, the VTEP equipment is on multiple physics forward-paths Non- head node, described device include：

Inspection unit, for after determining the IP address that the purpose IP address of the first VXLAN messages is this VTEP, checking institute State the information whether the first VXLAN messages carry target physical forward-path；

If retransmission unit, according to the information of the target physical forward-path, is reported the first VXLAN for carrying Message after text decapsulation re-starts VXLAN encapsulation, forms the 2nd VXLAN messages and forwards.

16. device according to claim 15, which is characterized in that the information of the target physical forward-path is the mesh Mark the IP address of the node on physics forward-path；

The retransmission unit is specifically used for working as the routing for determining the terminal note on this VTEP to the target physical forward-path not There are target physicals when intermediate node, carried from the first VXLAN messages between the terminal note by reachable and this VTEP In the node in addition to terminal note on forward-path, selection target node；Determining this VTEP to destination node routing When reachable, the message after being decapsulated to the first VXLAN messages re-starts VXLAN encapsulation, forms the 2nd VXLAN messages and simultaneously turns Hair；Wherein, the purpose IP address of the 2nd VXLAN messages is the destination node IP address；The 2nd VXLAN messages are taken The IP address of IP address with the intermediate node between the destination node and the terminal note and the terminal note；Or The 2nd VXLAN messages only carry the IP address of the terminal note；The value of the specific field of the 2nd VXLAN messages is First preset value；First preset value identifies the 2nd VXLAN messages with carrying on target physical forward-path the IP of node Location.

17. device according to claim 16, which is characterized in that the retransmission unit determines this also particularly useful for working as The routing of terminal note on VTEP to the target physical forward-path up to when, to the first VXLAN messages decapsulate after Message re-starts VXLAN encapsulation, forms the 3rd VXLAN messages；Wherein, the purpose IP address of the 3rd VXLAN messages is The IP address of the terminal note；The 3rd VXLAN messages do not carry the IP address of node on target physical forward-path；It is described The value of the specific field of 3rd VXLAN messages is the second preset value, and second preset value indicates the 3rd VXLAN messages not Carry the IP address of node on the target physical forward-path.