CN105939268A - Layer 2 forwarding table item aggregation method and layer 2 forwarding table item aggregation device - Google Patents
Layer 2 forwarding table item aggregation method and layer 2 forwarding table item aggregation device Download PDFInfo
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- CN105939268A CN105939268A CN201510712623.6A CN201510712623A CN105939268A CN 105939268 A CN105939268 A CN 105939268A CN 201510712623 A CN201510712623 A CN 201510712623A CN 105939268 A CN105939268 A CN 105939268A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/66—Layer 2 routing, e.g. in Ethernet based MAN's
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/54—Organization of routing tables
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/82—Miscellaneous aspects
- H04L47/825—Involving tunnels, e.g. MPLS
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Abstract
The invention provides a layer 2 forwarding table item aggregation method and a layer 2 forwarding table item aggregation device, applied to switch equipment. The method comprises the following steps of: acquiring multiple layer 2 forwarding table items under the same port, wherein the layer 2 forwarding table items are used for recording a corresponding relationship of a media access control MAC address of a virtual machine VM and the port; and merging the multiple layer 2 forwarding table items under the same port according to a predefined MAC address allocation rule of the VM. With the method and the device provided by the invention, the number of the layer 2 forwarding table items in the switch equipment can be reduced, the requirement on storage space of the switch equipment is lowered, and the system resource of the switch equipment is saved.
Description
Technical field
The application relates to network communication technology field, particularly relate to a kind of two-layer retransmitting table item polymerization and
Device.
Background technology
Data center generally uses server virtualization technology, and a physical server is virtualized into multiple stage
VM (Virtual Machine, virtual machine).Use VXLAN (Virtual eXtensible LAN,
Expansible Virtual Local Area Network) technology big double layer network in, usually require that physical server support
VXLAN technology, thus the two layer message sending VM carries out three layers of encapsulation, then entered by switching equipment
Row three layers forwarding.Therefore, the disposal ability of switching equipment will not be brought impact by the increase of VM quantity.
But, when VXLAN network exists traditional physical server, due to traditional physical server
Do not support VXLAN technology, it is impossible to the two layer message of VM is carried out three layers of encapsulation, it is therefore desirable to
Traditional physical server be connected switching equipment can perception VM MAC (Media Access Control,
Medium access control) address, and generate two-layer retransmitting table item according to the MAC Address of VM.But along with
The increase of VM quantity, two-layer retransmitting table item also can increase, and the memory capacity of switching equipment will be brought by this
Great challenge.
Summary of the invention
In view of this, the application provides a kind of two-layer retransmitting table item polymerization and device.
Specifically, the application is achieved by the following technical solution:
The application provides a kind of two-layer retransmitting table item polymerization, is applied on switching equipment, the method bag
Include:
Obtaining a plurality of two-layer retransmitting table item being positioned under same port, described two-layer retransmitting table item is used for record
The medium access control MAC Address of virtual machine VM and the corresponding relation of port；
MAC Address allocation rule according to predefined VM is to a plurality of two under described same port
Layer retransmitting table item merges.
The application also provides for a kind of two-layer retransmitting table item polyplant, is applied on switching equipment, this device
Including:
Acquiring unit, for obtaining a plurality of two-layer retransmitting table item being positioned under same port, described two layers turn
Forwarding list item is for recording the medium access control MAC Address of virtual machine VM and the corresponding relation of port；
Combining unit, is used for the MAC Address allocation rule according to predefined VM to described same
A plurality of two-layer retransmitting table item under port merges.
By above description it can be seen that the application MAC Address allocation rule by predefined VM,
The MAC Address making VM is assigned rule and can follow, and then learns switching equipment according to this Distribution dynamics
To two-layer retransmitting table item merge, to reduce the quantity of two-layer retransmitting table item in switching equipment, reduce
Requirement to switching equipment memory space, has saved the system resource of switching equipment.
Accompanying drawing explanation
Fig. 1 is a kind of VXLAN networking schematic diagram；
Fig. 2 is another kind of VXLAN networking schematic diagram；
Fig. 3 is a kind of two-layer retransmitting table item polymerization flow chart shown in the application one exemplary embodiment；
Fig. 4 is a kind of data center networking schematic diagram shown in the application one exemplary embodiment；
Fig. 5 is that a kind of two-layer retransmitting table item polyplant place shown in the application one exemplary embodiment sets
Standby underlying hardware structural representation；
Fig. 6 is the knot of a kind of two-layer retransmitting table item polyplant shown in the application one exemplary embodiment
Structure schematic diagram.
Detailed description of the invention
Here will illustrate exemplary embodiment in detail, its example represents in the accompanying drawings.Following
When description relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous
Key element.Embodiment described in following exemplary embodiment does not represent the institute consistent with the application
There is embodiment.On the contrary, they only with as appended claims describes in detail, the one of the application
The example of the apparatus and method that a little aspects are consistent.
It is only merely for describing the purpose of specific embodiment at term used in this application, and is not intended to be limiting
The application." a kind of " of singulative used in the application and appended claims, " institute
State " and " being somebody's turn to do " be also intended to include most form, unless context clearly shows that other implications.Also should
Work as understanding, term "and/or" used herein refer to and comprise one or more be associated list item
Any or all possible combination of purpose.
Although should be appreciated that may use term first, second, third, etc. various to describe in the application
Information, but these information should not necessarily be limited by these terms.These terms only be used for by same type of information that
This distinguishes.Such as, in the case of without departing from the application scope, the first information can also be referred to as
Two information, similarly, the second information can also be referred to as the first information.Depend on linguistic context, as in this institute
Use word " if " can be construed to " and ... time " or " when ... time " or " response
In determining ".
Data center generally uses server virtualization technology, and a physical server is virtualized into multiple stage
VM.As it is shown in figure 1, in the big double layer network using VXLAN technology, usually require that physics takes
VXLAN technology supported by business device, and the two layer message sent as VM arrives VTEP (VXLAN Tunnel
End Point, VXLAN tunneling termination node) equipment time, VTEP equipment two layer message is carried out
Three layers of encapsulation, then by switching equipment, the message after encapsulation is carried out three layers of forwarding.During this, exchange sets
The standby MAC Address that can only perceive physical server, it is impossible to the MAC Address of perception VM, therefore,
The disposal ability of switching equipment will not be brought impact by the increase of VM quantity.
But, under network environment shown in Fig. 2, due to traditional physical server (physical server 2)
Do not support VXLAN technology, it is impossible to the two layer message of VM is carried out three layers of encapsulation, it is therefore desirable to
The switching equipment 2 that this traditional physical server is connected can the MAC Address of perception VM, and according to VM
MAC Address generate two-layer retransmitting table item.But, along with the increase of VM quantity, two-layer retransmitting table
Item also can increase, and the memory capacity of switching equipment will be brought great challenge by this.
For the problems referred to above, the embodiment of the present application proposes a kind of two-layer retransmitting table item polymerization, the method
The two-layer retransmitting table item that switching equipment is learnt by the MAC Address allocation rule according to predefined VM
Merge, to reduce the quantity of two-layer retransmitting table item in switching equipment.
Seeing Fig. 3, for an embodiment flow chart of the application two-layer retransmitting table item polymerization, this is real
Execute example the polymerization process of two-layer retransmitting table item is described.
Step 301, obtains a plurality of two-layer retransmitting table item being positioned under same port, described two-layer retransmitting table
Item is for recording the medium access control MAC Address of VM and the corresponding relation of port.
The two-layer retransmitting table item (also known as MAC Address list item) of switching equipment generally uses self study side
Formula obtains, i.e. after receiving message, according to source MAC and the receiving terminal of this message of message
Mouth sets up corresponding relation, to represent that this MAC Address corresponding device is positioned under this port.
In the embodiment of the present application, the switching equipment being connected with traditional physical server also can pass through self study side
Formula generates two-layer retransmitting table item.See table 1, for the switching equipment shown in the application one exemplary embodiment
The two-layer retransmitting table item that arrives of study, each two-layer retransmitting table item have recorded the MAC Address of VM with
The corresponding relation of port, i.e. represents that a certain VM is connected under corresponding ports.
| List item sequence number | The MAC Address of VM | Port |
| 1 | 00:24:00:03:02:01 | 20 |
| 2 | 00:24:00:03:02:02 | 20 |
| 3 | 00:24:00:03:02:12 | 20 |
| 4 | 00:25:01:03:02:01 | 1 |
| 5 | 00:25:01:03:02:11 | 1 |
| 6 | 00:26:01:03:02:02 | 2 |
Table 1
Step 302, according to the MAC Address allocation rule of predefined VM to described same port
Under a plurality of two-layer retransmitting table item merge.
The embodiment of the present application, before system is run, has pre-defined the MAC Address allocation rule of VM.
The MAC Address allocation rule of this VM can be: the MAC Address of VM by N position prefix and
M position suffix composition, wherein, N position prefix is for representing the physical network being connected with port, M position suffix
It is positioned at the VM in described physical network for representing.Such as, with MAC Address 00:24:00:03:02:01
As a example by, first three byte (00:24:00) is prefix, and rear three bytes (03:02:01) are suffix.Its
In, available the first two byte (00:24) represents data center belonging to VM；3rd byte (00) table
Show that VM is positioned in which muon physics network of data center, be further to data center's physical network
Refinement, it is adaptable in the case of data center's physical network is more scattered, data center is divided into multiple
Muon physics network, each muon physics network is connected with the port of switching equipment；Rear three bytes
(03:02:01) for distinguishing the VM in Same Physical network.
The embodiment of the present application the most specifically limits the figure place of prefix and suffix, in actual applications, and can be in conjunction with tool
The prefix of the MAC Address of network topology flexible configuration VM of body and suffix.
This step according to the MAC Address allocation rule of predefined VM to two layers under same port
Forwarding-table item merges, particularly as follows:
Judge that the MAC Address prefix of VM in a plurality of two-layer retransmitting table item under this port is the most identical,
The two-layer retransmitting table item with identical MAC Address prefix is merged into a two-layer retransmitting table item.Specifically
Union operation can be, using identical MAC Address prefix as the two-layer retransmitting table item after merging
MAC Address prefix.
As a example by port 20 in table 1, under this port, there are 3 two-layer retransmitting table items, and these 3 two
The prefix (first three byte) of layer retransmitting table item is 00:24:00, therefore, by these 3 two layers forwardings
List item merges, and the MAC Address of the two-layer retransmitting table item after merging is 00:24:00:00:00:00, corresponding end
Mouth is 20.In like manner, other port can also merge, and the two-layer retransmitting table item after merging is as shown in table 2.
| List item sequence number | The MAC Address of VM | Port |
| 1 | 00:24:00:00:00:00 | 20 |
| 2 | 00:25:01:00:00:00 | 1 |
| 3 | 00:26:01:03:02:02 | 2 |
Table 2
When switching equipment receives message, go to mate two layers of forwarding according to the target MAC (Media Access Control) address of message
List item, confirmation message target MAC (Media Access Control) address prefix with merge after the MAC of two-layer retransmitting table item
When address prefix is identical, E-Packeted by corresponding ports.
By foregoing description it can be seen that the application MAC Address allocation rule by predefined VM,
The MAC Address making VM is assigned rule and can follow, and then learns switching equipment according to this Distribution dynamics
To two-layer retransmitting table item merge, to reduce the quantity of two-layer retransmitting table item in switching equipment, reduce
Requirement to switching equipment memory space, has saved the system resource of switching equipment.
Now as a example by Fig. 4, two-layer retransmitting table item polymerisation process is discussed in detail.
Fig. 4 is the data center's schematic diagram simplified, wherein, VM11, VM12, VM21, VM22
For virtual machine, SW1 and SW2 is switching equipment.It is assumed that data center 1 and data center 2 all do not have
Have application VXLAN technology, then SW1 and SW2 is required for performing two-layer retransmitting table item polymerization.
It is assumed that the allocation rule of the virtual machine MAC Address of definition is: MAC Address is by three bytes
(24bit) prefix and the suffix composition of three bytes (24bit), wherein, the first two table of bytes registration
According to center, the 3rd byte representation muon physics network, rear three byte representation virtual machines.Each virtual machine
MAC Address distribution sees table 3.
| Virtual machine | MAC Address |
| VM11 | 00:24:00:03:02:01 |
| VM12 | 00:24:00:03:02:02 |
| VM21 | 00:25:01:03:02:01 |
| VM22 | 00:25:01:03:02:02 |
Table 3
SW1 obtains two-layer retransmitting table shown in table 4 by self study.
| List item sequence number | The MAC Address of VM | Port |
| 1 | 00:25:01:03:02:01 | S10 |
| 2 | 00:25:01:03:02:02 | S10 |
| 3 | 00:24:00:03:02:01 | S11 |
| 4 | 00:24:00:03:02:02 | S12 |
Table 4
Wherein, there are two two-layer retransmitting table items, and the MAC of these two two-layer retransmitting table items under S10 port
Address prefix is identical, merges these two two-layer retransmitting table items, the available shown two layers of forwarding of table 5
Table.
| List item sequence number | The MAC Address of VM | Port |
| 1 | 00:25:01:00:00:00 | S10 |
| 2 | 00:24:00:03:02:01 | S11 |
| 3 | 00:24:00:03:02:02 | S12 |
Table 5
In like manner, SW2 obtains two-layer retransmitting table shown in table 6 by self study.
| List item sequence number | The MAC Address of VM | Port |
| 1 | 00:24:00:03:02:01 | S20 |
| 2 | 00:24:00:03:02:02 | S20 |
| 3 | 00:25:01:03:02:01 | S21 |
| 4 | 00:25:01:03:02:02 | S22 |
Table 6
After table 6 merging treatment, two-layer retransmitting table shown in available table 7.
| List item sequence number | The MAC Address of VM | Port |
| 1 | 00:24:00:00:00:00 | S20 |
| 2 | 00:25:01:03:02:01 | S21 |
| 3 | 00:25:01:03:02:02 | S22 |
Table 7
It is assumed that the VM21 that the VM11 in data center 1 is in data center 2 sends message, SW1
The two-layer retransmitting table item in target MAC (Media Access Control) address 00:25:01:03:02:01 matching list 5 according to message,
MAC ground in target MAC (Media Access Control) address prefix 00:25:01 of this message and the 1st article of two-layer retransmitting table item
Location prefix is identical, and therefore, message is forwarded by SW1 from port S10.
After SW2 receives message, mate according to the target MAC (Media Access Control) address 00:25:01:03:02:01 of message
In two-layer retransmitting table item in table 7, the target MAC (Media Access Control) address of this message and the 2nd article of two-layer retransmitting table item
MAC Address identical, therefore, SW2 by message from port S21 forward, message arrive VM21.
Corresponding with the embodiment of aforementioned two-layer retransmitting table item polymerization, present invention also provides two layers and turn
The embodiment of forwarding list item polyplant.
The embodiment of the application two-layer retransmitting table item polyplant can be applied on switching equipment.Device is real
Execute example to be realized by software, it is also possible to realize by the way of hardware or software and hardware combining.With soft
As a example by part realizes, as the device on a logical meaning, it is to be run by the processor of its place equipment
Computer program instructions corresponding in memorizer is formed.For hardware view, as it is shown in figure 5, be
A kind of hardware structure diagram of the application two-layer retransmitting table item polyplant place equipment, shown in Fig. 5
Outside processor, network interface and memorizer, in embodiment, the equipment at device place is generally according to this
The actual functional capability of equipment, it is also possible to include other hardware, this is repeated no more.
Refer to Fig. 6, the structure for the two-layer retransmitting table item polyplant in one embodiment of the application is shown
It is intended to.This two-layer retransmitting table item polyplant includes acquiring unit 601 and combining unit 602, wherein:
Acquiring unit 601, for obtaining a plurality of two-layer retransmitting table item being positioned under same port, described two
Layer retransmitting table item is for the medium access control MAC Address recording virtual machine VM pass corresponding with port
System；
Combining unit 602, is used for the MAC Address allocation rule according to predefined VM to described
A plurality of two-layer retransmitting table item under same port merges.
Further,
The MAC Address that MAC Address allocation rule is described VM of described VM by N position prefix and
M position suffix composition, wherein, described N position prefix is for representing the physical network being connected with port, described
M position suffix is positioned at the VM in described physical network for expression.
Further, described combining unit 602, including:
List item judge module, for judging the MAC Address of the VM in described a plurality of two-layer retransmitting table item
Prefix is the most identical；
List item merges module, for being merged into by the two-layer retransmitting table item with identical MAC Address prefix
Article one, two-layer retransmitting table item.
Further,
Described list item merge module, specifically for using described identical MAC Address prefix as merge after
The MAC Address prefix of two-layer retransmitting table item, so that described switching equipment is in purpose MAC of confirmation message
When address prefix is identical with the MAC Address prefix of the two-layer retransmitting table item after described merging, by correspondence
Port forwards described message.
In said apparatus, the function of unit and the process that realizes of effect specifically refer in said method corresponding
Step realize process, do not repeat them here.
For device embodiment, owing to it corresponds essentially to embodiment of the method, so relevant part ginseng
See that the part of embodiment of the method illustrates.Device embodiment described above is only schematically,
The wherein said unit illustrated as separating component can be or may not be physically separate, makees
The parts shown for unit can be or may not be physical location, i.e. may be located at a place,
Or can also be distributed on multiple NE.Can select according to the actual needs part therein or
The whole module of person realizes the purpose of the application scheme.Those of ordinary skill in the art are not paying creativeness
In the case of work, i.e. it is appreciated that and implements.
The foregoing is only the preferred embodiment of the application, not in order to limit the application, all at this
Within the spirit of application and principle, any modification, equivalent substitution and improvement etc. done, should be included in
Within the scope of the application protection.
Claims (8)
1. a two-layer retransmitting table item polymerization, is applied on switching equipment, it is characterised in that the party
Method includes:
Obtaining a plurality of two-layer retransmitting table item being positioned under same port, described two-layer retransmitting table item is used for record
The medium access control MAC Address of virtual machine VM and the corresponding relation of port；
MAC Address allocation rule according to predefined VM is to a plurality of two under described same port
Layer retransmitting table item merges.
2. the method for claim 1, it is characterised in that:
The MAC Address that MAC Address allocation rule is described VM of described VM by N position prefix and
M position suffix composition, wherein, described N position prefix is for representing the physical network being connected with port, described
M position suffix is positioned at the VM in described physical network for expression.
3. method as claimed in claim 2, it is characterised in that described according to predefined VM's
A plurality of two-layer retransmitting table item under described same port is merged by MAC Address allocation rule, including:
Judge that the MAC Address prefix of VM in described a plurality of two-layer retransmitting table item is the most identical；
The two-layer retransmitting table item with identical MAC Address prefix is merged into a two-layer retransmitting table item.
4. method as claimed in claim 3, it is characterised in that described will have identical MAC Address
The two-layer retransmitting table item of prefix merges into a two-layer retransmitting table item, including:
Using described identical MAC Address prefix as the MAC Address prefix of two-layer retransmitting table item after merging,
So that described switching equipment turns with two layers after described merging in the target MAC (Media Access Control) address prefix of confirmation message
When the MAC Address prefix of forwarding list item is identical, forward described message by corresponding ports.
5. a two-layer retransmitting table item polyplant, is applied on switching equipment, it is characterised in that this dress
Put and include:
Acquiring unit, for obtaining a plurality of two-layer retransmitting table item being positioned under same port, described two layers turn
Forwarding list item is for recording the medium access control MAC Address of virtual machine VM and the corresponding relation of port；
Combining unit, is used for the MAC Address allocation rule according to predefined VM to described same
A plurality of two-layer retransmitting table item under port merges.
6. device as claimed in claim 5, it is characterised in that:
The MAC Address that MAC Address allocation rule is described VM of described VM by N position prefix and
M position suffix composition, wherein, described N position prefix is for representing the physical network being connected with port, described
M position suffix is positioned at the VM in described physical network for expression.
7. device as claimed in claim 6, it is characterised in that described combining unit, including:
List item judge module, for judging the MAC Address of the VM in described a plurality of two-layer retransmitting table item
Prefix is the most identical；
List item merges module, for being merged into by the two-layer retransmitting table item with identical MAC Address prefix
Article one, two-layer retransmitting table item.
8. device as claimed in claim 7, it is characterised in that:
Described list item merge module, specifically for using described identical MAC Address prefix as merge after
The MAC Address prefix of two-layer retransmitting table item, so that described switching equipment is in purpose MAC of confirmation message
When address prefix is identical with the MAC Address prefix of the two-layer retransmitting table item after described merging, by correspondence
Port forwards described message.
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| CN107342941A (en) * | 2017-06-01 | 2017-11-10 | 杭州迪普科技股份有限公司 | A kind of optimization method and device of VXLAN control planes |
| CN107342941B (en) * | 2017-06-01 | 2019-11-12 | 杭州迪普科技股份有限公司 | A kind of optimization method and device of VXLAN control plane |
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| CN107360104B (en) * | 2017-07-31 | 2021-04-02 | 郑州云海信息技术有限公司 | Method and device for realizing tunnel endpoint network |
| CN111049746A (en) * | 2018-10-12 | 2020-04-21 | 华为技术有限公司 | Routing table item generation method, dictionary tree generation method and device |
| CN111049746B (en) * | 2018-10-12 | 2022-04-22 | 华为技术有限公司 | Routing table item generation method, dictionary tree generation method and device |
| US11627072B2 (en) | 2018-10-12 | 2023-04-11 | Huawei Technologies Co., Ltd. | Routing entry generation method and apparatus and trie generation method and apparatus |
| CN110611646A (en) * | 2018-11-26 | 2019-12-24 | 新华三技术有限公司 | Port security policy merging method and device and switching equipment |
| CN110611646B (en) * | 2018-11-26 | 2020-07-07 | 新华三技术有限公司 | Port security policy merging method and device and switching equipment |
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