CN106301921A - Elephant flow transmission dispatching method based on tunnel and system - Google Patents

Elephant flow transmission dispatching method based on tunnel and system Download PDF

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Publication number
CN106301921A
CN106301921A CN201610678063.1A CN201610678063A CN106301921A CN 106301921 A CN106301921 A CN 106301921A CN 201610678063 A CN201610678063 A CN 201610678063A CN 106301921 A CN106301921 A CN 106301921A
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tunnel
server
flow
transmission
request
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CN106301921B (en
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赵俊
包丛笑
李星
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Tsinghua University
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Tsinghua University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0896—Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • 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
    • H04L45/02—Topology update or discovery
    • 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
    • H04L45/12—Shortest path evaluation
    • H04L45/123—Evaluation of link metrics
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The present invention provides elephant flow transmission dispatching method based on tunnel and system, and method includes: private address distribution server is that tunnel access server distributes unique private address section；Tunnel access server measure periodically and the link bandwidth of tunnel transfer server and set up and link bandwidth maximum tunnel transfer server between tunnel；Tunnel transfer server is sent out tunnel to network topology acquisition server and is set up message so that it is safeguards network tunnel topology and tunnel type and controls server update to flow scheduling in real time；Data transfer request acquisition server gathers the flow transmission request of tunnel access server and the transmission of tunnel transfer server and is issued flow scheduling control server；Flow scheduling control server according to tunnel topology, tunnel type and flow transmission request for each flow transmission request calculate optimal transmission paths, and issue stream table with build optimal transmission paths complete data transmission.Energy high efficiency of transmission elephant data on flows of the present invention also ensures transmission reliability.

Description

Elephant flow transmission dispatching method based on tunnel and system
Technical field
The present invention relates to network communication technology field, particularly relate to a kind of elephant flow transmission dispatching method based on tunnel And system.
Background technology
The Internet of today is an extremely complex system, and it runs diversified application, such as IMU Letter and Remote Video Conference etc.；The bandwidth demand of transmission link is also not quite similar by these application, from 10Kbps to 100Mbps.Source node there may be many transmission paths between destination node, but owing to the Internet is based on purpose IP (Internet Protocol, the agreement of interconnection between network) carries out packet and forwards, and the message possessing identical purpose IP can only It is transmitted along identical link.Owing to the Internet provides the service done one's best, simultaneously because port speed constraint, link congestion Etc. reason, if current transmission link cannot meet the elephant flow demand to bandwidth, may result in network application cannot be just Often work.
Tunnel encapsulation technology is by the way of a kind of infrastructure by using internet transmits data between networks. The data (or load) using tunnel to transmit can be Frame or the bag of different agreement.Tunnel protocol is by the data of other agreement Then frame or bag Reseal are sent by tunnel.New frame head provides routing iinformation, and different frame heads can be along different chains Road forwards, to make full use of the bandwidth resources of two internodal multilinks.
In terms of flow scheduling, traditional way is manager's manual configuration routing table, adds O&M the most undoubtedly Cost, reduces extensibility.Software defined network (Software Defined Network is called for short SDN) technology uses collection Network traffics, by flow monitoring and automatically configuring, are optimized from overall situation visual angle, reduce network by the flow scheduling of Chinese style Manual intervention, simplifies the difficulty of network O&M, improves extensibility.
In consideration of it, on the Internet done one's best, how to transmit elephant flow efficiently according to current network condition Data, and ensure that the reliability that flow transmits becomes to be presently required and solve the technical problem that.
Summary of the invention
For solving above-mentioned technical problem, the present invention provides a kind of elephant flow transmission dispatching method based on tunnel and is System, it is possible on the Internet done one's best, transmits elephant data on flows efficiently according to current network condition, and ensures stream The reliability of amount transmission.
First aspect, the present invention provides a kind of elephant flow transmission dispatching method based on tunnel, including:
Tunnel access server sends the first request every the first preset time period to private address distribution server, is used for To described private address distribution server application unique private address section；
Private address distribution server safeguards, according to described first request, the private address network segment data base pre-build, and Unique private address section of described tunnel access server distribution it is sent as to described tunnel access server；
Tunnel access server is according to the private address section that described private address distribution server is its distribution, for described The flow that tunnel access server connects sends equipment/flow and receives equipment distribution IP address；
It is based on different agreement with tunnel transfer server that tunnel access server measures it every the second preset time period The link bandwidth in tunnel, and set up the tunnel between itself and the tunnel transfer server of link bandwidth maximum；
Tunnel transfer server safeguards the tunnel list pre-build, and builds to network topology acquisition server transmission tunnel Vertical message；
Network topology acquisition server is receiving after described tunnel sets up message, sets up message according to described tunnel and safeguards The tunnel topology information of network and tunnel type, and by the tunnel topology information of network and tunnel type in real time to flow scheduling control Control server updates；
Sending equipment at described flow has data treat by tunnel access server, tunnel transfer server and set up When tunnel transmission to described flow receives equipment, tunnel access server and tunnel transfer server are to data transfer request collection The transmission request of server transmitted traffic；
Data transfer request acquisition server gathers the flow of tunnel access server and the transmission of tunnel transfer server and passes Defeated request, is sent to flow scheduling by the transmission request of described flow and controls server；
Flow scheduling controls server tunnel topology information, tunnel type and the transmission request of described flow according to network, Calculate optimal transmission paths for the transmission request of each flow, and issue stream table to build described optimal transmission paths, complete Data are transmitted.
Alternatively, in described first request, the parameter field that carries includes: the gateway MAC address of tunnel access server, The gateway ip address of tunnel access server, the IP address of tunnel access server, the MAC Address of tunnel access server, tunnel The subnet mask of road access server；Wherein, the MAC Address of described tunnel access server is major key；
Field in described private address network segment data base, including: the gateway MAC address of tunnel access server, tunnel The gateway ip address of access server, the IP address of tunnel access server, the MAC Address of tunnel access server, tunnel connect Enter the subnet mask of server, the private address section of distribution and update private address section timestamp.
Alternatively, described private address distribution server safeguards private address network segment data base according to described first request, And it is sent as, to described tunnel access server, unique private address section that described tunnel access server distributes, including:
After described private address distribution server receives described first request, inquiry private address network segment data base is The entry of the no MAC Address that there is described tunnel access server；
If not existing, then distribute unique private address section for described tunnel access server and be sent to described tunnel and connect Enter server, the private address section distributed for described tunnel access server is stored in described private address network segment data base simultaneously In；
If existing, then will described private address network segment data base be the privately owned of described tunnel access server distribution Address field is sent to described tunnel access server, updates the renewal private address section timestamp field of described entry simultaneously.
Alternatively, first is sent every preset time period to private address distribution server at described tunnel access server Before request, described method also includes:
Private address distribution server every the 3rd preset time period scan in described private address network segment data base article Mesh, if the timestamp distance current time stamp of a certain entry is more than predetermined threshold value, then deletes this entry, and reclaims in this entry point The private address section joined.
Alternatively, described different agreement, including: udp protocol, Transmission Control Protocol or GRE protocol.
Alternatively, message is set up in described tunnel, including: the kind in the start node in tunnel, terminal node and tunnel.
Alternatively, described method also includes:
Tunnel transfer server refreshes the tunnel list set up every the 4th preset time period, if finding, tunnel disconnects even Connect, then to network topology acquisition server transmission tunnel teardown message, described tunnel teardown message, including: the initial joint in tunnel The kind in point, terminal node and tunnel.
Alternatively, the parameter field carried in described flow transmission request includes: source IP address, purpose IP address, agreement And COS；
Correspondingly, described data transfer request acquisition server gathers tunnel access server and tunnel transfer server is sent out The flow transmission request sent, is sent to flow scheduling by the transmission request of described flow and controls server, including:
Described data transfer request acquisition server gathers tunnel access server and the stream of tunnel transfer server transmission Amount transmission request, extracts the source IP address in the transmission request of described flow and purpose IP address；
Described data transfer request acquisition server according to the entry in described private address network segment data base by described source IP address and purpose IP address are converted to the corresponding private ip network segment；
The transmission request of described flow is stored in the form of two tuples and builds in advance by described data transfer request acquisition server In vertical data transfer request list, described two tuples include: privately owned source IP network section and privately owned purpose IP network section；
When described data transfer request list changes, described data transfer request acquisition server is by described change Update and control server to described flow scheduling.
Alternatively, described flow scheduling controls server tunnel topology information, tunnel type and described stream according to network Measure transmission request, calculate optimal transmission paths for the transmission request of each flow, and issue stream table to build described optimum biography Defeated path, completes data transmission, including:
Described flow scheduling controls server and updates network topological diagram G according to tunnel topology information and the tunnel type of network =(V, E), wherein, V is the set on the summit in network topology, and E is the set on the limit being made up of the summit in network topology；
Described flow scheduling controls server update flow transmission request D, and the number of flow transmission request is n=| D |；
Some alternative paths are found for the transmission request of each flow
Utilize linear programming algorithm, with the minimum object function of global traffic transmission delay, please for the transmission of each flow Ask from some alternative paths, select an optimal transmission paths；
After solving optimal transmission paths, the tunnel utilizing OpenFlow agreement relevant in described optimal transmission paths connects Enter server/tunnel transfer server and issue stream table to build described optimal transmission paths, complete data transmission；
Wherein, described object function is:
min Σ i = 1 n Σ j = 1 | P i | ( Σ e ∈ P i , j RTT e ) · δ i , j
Wherein, n is the number of flow transmission request, PiFor distribute for the transmission request of i-th flow | Pi| individual alternative path Set, e is alternative path Pi,jIn a limit, RTTeFor flow at the transmission delay of limit e, δi,jRepresent the transmission of i-th flow Whether request selects j-th strip alternative path as optimal transmission paths；
The restrictive condition of described object function includes:
It is only each request and chooses an optimal path；
Flow through whole speed sums on a certain bar limit less than this limit Link bandwidth；
Wherein,Represent whether limit e belongs to alternative path Pi,j, DiThe bandwidth demand asked for the transmission of i-th flow, BWeAvailable bandwidth for limit e.
Second aspect, the present invention provides a kind of elephant flow transmitting and scheduling system based on tunnel, including:
Tunnel access server, tunnel transfer server, private address distribution server, network topology acquisition server, Data transfer request acquisition server and flow scheduling control server；
Described tunnel access server, for sending first every the first preset time period to private address distribution server Request, for described private address distribution server application unique private address section；
Described private address distribution server, for safeguarding, according to described first request, the private address network segment pre-build Data base, and unique private address section of described tunnel access server distribution it is sent as to described tunnel access server；
Described tunnel access server, each flow sends equipment/flow and receives equipment all by tunnel access server Access the Internet, be additionally operable to according to described private address distribution server be its distribution private address section, for described tunnel The flow that access server connects sends equipment/flow and receives equipment distribution IP address；
Described tunnel access server, be additionally operable to every the second preset time period measure its with tunnel transfer server based on The link bandwidth in the tunnel of different agreement, and set up the tunnel between itself and the tunnel transfer server of link bandwidth maximum；
Described tunnel transfer server, is additionally operable to safeguard the tunnel list pre-build, and services to network topology collection Device sends tunnel and sets up message；
Described network topology acquisition server, for receiving after described tunnel sets up message, builds according to described tunnel Vertical message safeguards tunnel topology information and the tunnel type of network, and by the tunnel topology information of network and tunnel type in real time to Flow scheduling controls server update；
Described tunnel access server and tunnel transfer server, being additionally operable to send equipment at described flow has data to wait to lead to When crossing tunnel access server, tunnel transfer server and the tunnel transmission extremely described flow reception equipment set up, to data Transmission request acquisition server transmitted traffic transmission request；
Described data transfer request acquisition server, is used for gathering tunnel access server and tunnel transfer server sends Flow transmission request, by described flow transmission request be sent to flow scheduling control server；
Described flow scheduling controls server, for tunnel topology information, tunnel type and described flow according to network Transmission request, calculates optimal transmission paths for the transmission request of each flow, and issues stream table to build described optimal transmission Path, completes data transmission.
As shown from the above technical solution, the elephant flow transmission dispatching method based on tunnel of the present invention and system, it is possible to On the Internet done one's best, transmit elephant data on flows efficiently according to current network condition, and ensure that flow transmits Reliability.
Accompanying drawing explanation
The schematic flow sheet of the elephant flow transmission dispatching method based on tunnel that Fig. 1 provides for one embodiment of the invention；
The experiment topological diagram that Fig. 2 is used by one embodiment of the invention；
Fig. 3 be in embodiment illustrated in fig. 2 Tianjin to Beijing based on UDP, TCP, the available bandwidth measurement result of gre tunneling；
Fig. 4 is 24 hours bandwidth measurement results in the transmission path built for flow transmission request in embodiment illustrated in fig. 2.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is carried out clear, complete description, it is clear that described embodiment is only It is only a part of embodiment of the present invention rather than whole embodiments.Based on embodiments of the invention, ordinary skill people The every other embodiment that member is obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
Fig. 1 shows the flow process signal of the elephant flow transmission dispatching method based on tunnel that one embodiment of the invention provides Figure, the elephant flow transmission dispatching method based on tunnel of the present embodiment is adjusted based on following elephant flow based on tunnel transmission Degree system, as it is shown in figure 1, the elephant flow transmission dispatching method based on tunnel of the present embodiment is as described below.
101, tunnel access server sends the first request every the first preset time period to private address distribution server, For to described private address distribution server application unique private address section.
In a particular application, described first request can be carried in described first request based on http protocol POST mode Parameter field may include that gateway MAC (Media Access Control or Medium of tunnel access server Access Control, media interviews control) address, the gateway ip address of tunnel access server, tunnel access server IP address, the MAC Address of tunnel access server and the subnet mask etc. of tunnel access server；Wherein, described tunnel accesses The MAC Address of server is major key.
Ask it is understood that step 101 sends first every the first preset time period to private address distribution server The purpose asked is: in order to avoid the private address network segment is reclaimed by private address distribution server because of time-out.
102, private address distribution server safeguards, according to described first request, the private address network segment data pre-build Storehouse, and unique private address section of described tunnel access server distribution it is sent as to described tunnel access server.
In a particular application, the field in described private address network segment data base may include that tunnel access server Gateway MAC address, the gateway ip address of tunnel access server, the IP address of tunnel access server, tunnel access server MAC Address, the subnet mask of tunnel access server, the private address section of distribution and update private address section timestamp.
Specifically, described step 102, can specifically include:
After described private address distribution server receives described first request, inquiry private address network segment data base is The entry of the no MAC Address that there is described tunnel access server；
If not existing, then distribute unique private address section for described tunnel access server and be sent to described tunnel and connect Enter server, the private address section distributed for described tunnel access server is stored in described private address network segment data base simultaneously In；
If existing, then will described private address network segment data base be the privately owned of described tunnel access server distribution Address field is sent to described tunnel access server, updates the renewal private address section timestamp field of described entry simultaneously.
In a particular application, described method can also include:
Private address distribution server every the 3rd preset time period scan in described private address network segment data base article Mesh, if the timestamp distance current time stamp of a certain entry is more than predetermined threshold value, then deletes this entry, and reclaims in this entry point The private address section joined.
103, tunnel access server according to described private address distribution server be its distribution private address section, for The flow that described tunnel access server connects sends equipment/flow and receives equipment distribution IP address.
It should be noted that in a particular application, each flow sends equipment/flow and receives equipment all by tunnel access clothes Business device accesses the Internet.
104, tunnel access server measures it from tunnel transfer server based on different associations every the second preset time period The link bandwidth in the tunnel of view, and set up the tunnel between itself and the tunnel transfer server of link bandwidth maximum.
Wherein, described different agreement, may include that (User Datagram Protocol is called for short UDP UDP), transmission control protocol (Transmission Control Protocol is called for short TCP) or Generic Routing Encapsulation Tunnel protocols such as (Generic Routing Encapsulation are called for short GRE), the present embodiment is not limited, also Other tunnel protocols can be included.
Specifically, at step 104, can select and makeMaximum tunnel transfer server s sets up q type tunnel Road；
Wherein s ∈ S is the set of whole tunnels transfer server, and q ∈ I is the type set in whole tunnel,Represent Link between tunnel access server and tunnel transfer server s available bandwidth measurement result based on q type tunnel.
105, tunnel transfer server safeguards the tunnel list pre-build, and sends tunnel to network topology acquisition server Message is set up in road.
Wherein, message is set up in described tunnel, may include that the kind in the start node in tunnel, terminal node and tunnel Deng.
In a particular application, described method can also include:
Tunnel transfer server refreshes the tunnel list set up every the 4th preset time period, if finding, tunnel disconnects even Connect, then send tunnel teardown message to network topology acquisition server；
Wherein, described tunnel teardown message, including: the kind in the start node in tunnel, terminal node and tunnel.
106, network topology acquisition server is receiving after described tunnel sets up message, sets up message according to described tunnel Safeguard tunnel topology information and the tunnel type of network, and tunnel topology information and the tunnel type of network are adjusted to flow in real time Degree controls server update.
107, sending equipment at described flow has data treat by tunnel access server, tunnel transfer server and built When vertical tunnel transmission to described flow receives equipment, tunnel access server and tunnel transfer server are to data transfer request The transmission request of acquisition server transmitted traffic.
Wherein, in described flow transmission request, the parameter field that carries includes: source IP address, purpose IP address, agreement and COS etc..
In a particular application, described flow transmission request is the packet incoming Packet-In class in OpenFlow agreement Type message.
108, data transfer request acquisition server gathers tunnel access server and the stream of tunnel transfer server transmission Amount transmission request, is sent to flow scheduling by the transmission request of described flow and controls server.
In a particular application, the parameter field carried in the transmission request of described flow includes: source IP address, purpose IP ground When location, agreement and COS, correspondingly, described step 108, may particularly include:
Described data transfer request acquisition server gathers tunnel access server and the stream of tunnel transfer server transmission Amount transmission request, extracts the source IP address in the transmission request of described flow and purpose IP address；
Described data transfer request acquisition server according to the entry in described private address network segment data base by described source IP address and purpose IP address are converted to the corresponding private ip network segment；
The transmission request of described flow is stored in the form of two tuples and builds in advance by described data transfer request acquisition server In vertical data transfer request list, described two tuples include: privately owned source IP network section and privately owned purpose IP network section；
When described data transfer request list changes, described data transfer request acquisition server is by described change Update and control server to described flow scheduling.
109, flow scheduling control server please according to tunnel topology information, tunnel type and the transmission of described flow of network Ask, calculate optimal transmission paths for the transmission request of each flow, and issue stream table to build described optimal transmission paths, complete Become data transmission.
In a particular application, described step 109 can specifically include:
Described flow scheduling controls server and updates network topological diagram G according to tunnel topology information and the tunnel type of network =(V, E), wherein, V is the set on the summit in network topology, and E is the set on the limit being made up of the summit in network topology；
Described flow scheduling controls server update flow transmission request D, and the number of flow transmission request is n=| D |；
Some alternative path P are found for the transmission request of each flowi,
Utilize linear programming algorithm, with the minimum object function of global traffic transmission delay, please for the transmission of each flow Ask from some alternative paths, select an optimal transmission paths；
After solving optimal transmission paths, the tunnel utilizing OpenFlow agreement relevant in described optimal transmission paths connects Enter server/tunnel transfer server and issue stream table to build described optimal transmission paths, complete data transmission；
Wherein, described object function is:
min Σ i = 1 n Σ j = 1 | P i | ( Σ e ∈ P i , j RTT e ) · δ i , j
Wherein, n is the number of flow transmission request, PiFor distribute for the transmission request of i-th flow | Pi| individual alternative path Set, e is alternative path Pi,jIn a limit, RTTeFor flow at the transmission delay of limit e, δi,jRepresent the transmission of i-th flow Whether request selects j-th strip alternative path as optimal transmission paths；
The restrictive condition of described object function includes:
It is only each request and chooses an optimal path；
Flow through whole speed sums on a certain bar limit less than this limit Link bandwidth；
Wherein,Represent whether limit e belongs to alternative path Pi,j, DiThe bandwidth demand asked for the transmission of i-th flow, BWeAvailable bandwidth for limit e.
The elephant flow transmission dispatching method based on tunnel of the present embodiment, by interconnecting netting index widely in distribution on global According to center IDC and cloud platform are disposed tunnel transfer server；Set up tunnel based on agreements such as UDP, TCP, GRE and connect each Tunnel access/transfer server；Flow scheduling control in server the tunnel accesss/transfer server according to the whole network topological with And flow transmission request, with the available bandwidth of tunnel links as restrictive condition, calculate optimum transmission path for each request, Utilize OpenFlow agreement to issue stream table, build flow transmission path.This have the advantage that utilize widely distributed Cloud Server create polytype tunnel, contribute to breaking through the rate limit between local operator and Autonomous Domain；Utilize Flow scheduling controls server and OpenFlow agreement builds transmission link, contributes to optimizing link circuit resource utilization rate, it is achieved net The flexible control of network flow transmission, improves the extensibility of system.The present embodiment can on the Internet done one's best, according to Current network condition transmits elephant data on flows efficiently, and ensures the reliability that flow transmits.
It is understood that operator is for flow scheduling and distributed denial of service attack (Distributed Denial of service attack, is called for short DDoS) consideration taken precautions against, often make speed according to the kind of message protocol Restriction.And the present invention is by measuring link available bandwidth based on various protocols, finally chooses and use available bandwidth maximum Protocol type builds transmission tunnel, such that it is able to break through the flow restriction rule of operator, maximized utilizes network link Carry out data transmission.
The Internet is made up of numerous Autonomous Domains, transmits for the flow across Autonomous Domain, and operator is for operation cost Consideration, the transfer rate across Autonomous Domain flow can be made certain restriction；The present embodiment is by being distributed in all over the world IDC and cloud platform in dispose multiple tunnels transfer server and carry out flow transfer, evade the flow restriction of operator further.
The present embodiment utilizes SDN by datum plane and to control planar separation, by controller centralized maintenance network topology and The bandwidth resources of each of the links, and the transmission link of unified allocation of resources traffic requests, contribute to utilizing efficiently link circuit resource, simultaneously Add the extensibility of system.
Following as a example by the experiment topological diagram shown in Fig. 2, at data transfer request acquisition server, network in the present embodiment Topology acquisition server, flow scheduling control to dispose on server SDN controller RYU；In tunnel access server, tunnel transfer Open vSwitch and OpenVPN is disposed on server；Private address distribution server is disposed http server and MySQL Data base.
When tunnel access server starts, http protocol can be utilized to send first to private address distribution server please Ask, for described private address distribution server application unique private IP address section, such as 10.213.204.96/29.Institute First request of stating uses POST mode, and design parameter field may include that the gateway MAC address of tunnel access server, tunnel The gateway ip address of access server, the IP address of tunnel access server, the MAC Address of tunnel access server and tunnel connect Enter the subnet mask etc. of server；Wherein, the MAC Address of described tunnel access server is major key.
Specifically, tunnel access server can send the first request every 10 minutes to private address distribution server.
Private address distribution server is pre-created private_ip_allocation table (i.e. private address network segment data Storehouse) store the private address section of distribution, its field information may include that
IP, the IP address of tunnel access server, it may be possible to private net address, such as 192.168.31.99；
MAC, the MAC Address of tunnel access server, major key；
NETMASK, the subnet mask of tunnel access server；
GATEWAY_IP, the gateway ip address of tunnel access server；
GATEWAY_MAC, the gateway MAC address of tunnel access server；
PRIVATE_IP_BLOCK, the private address section of distribution；
TIMETAMP, updates the timestamp of private address request.
One example of described private_ip_allocation database table is as shown in table 1.
Table 1
When there being new private address request to arrive, first look for having distributed private address section, if it is, Directly return the private address section of distribution and update TIMESTAMP field；If it is not, then redistribute new private address section also New assignment record is added in database table.
If the TIMESTAMP of certain record did not updated more than 1 hour, we then delete this record, in order to return The private address section that contracture is joined.
After tunnel access server obtains the private address section of distribution, DHCP (Dynamic can be opened Host Configuration Protocol, is called for short DHCP) service, the flow for accessing sends or the equipment of reception distribution IP ground Location.
Tunnel access server and the tunnel transfer server being positioned at Guangzhou, Beijing and Tokyo carry out respectively based on UDP, The bandwidth test in the tunnels such as TCP, GRE, the tunnel access server of what Fig. 3 represented be in Tianjin be positioned in tunnel, Pekinese Turn the bandwidth test result between server.
According to the measurement result of bandwidth, the tunnel access server of final Tianjin be positioned at tunnel, Pekinese transfer server Set up TCP tunnel；The tunnel access server tunnel transfer server that is final and that be positioned at Tokyo being in like manner positioned at nine divisions of China in remote antiquity sets up GRE Tunnel.
No matter being successfully established which kind of tunnel, tunnel transfer server is required for the tunnel information of foundation with JSON-RPC 2.0 forms are sent to network topology acquisition server, and a kind of possible format sample is as follows:
{"jsonrpc":"2.0","result":{"code":6,"message":"create vpn tunnel succeed！","data":{"client":{"dpid":"202481590619033","ip":"202.113.59.200"," local_ip":"202.113.59.200"},"server":{"dpid":"90596591410","ip":" 115.25.86.14"},"type":"TCP"}},"id":0}
Wherein, parameter dpid is unique mark of tunnel access/transfer server, and its numerical computation method is by 16 systems MAC Address be converted to the integer character string of 10 systems.
Network topology acquisition server safeguards the tunnel topology situation of tunnel access/transfer server in whole network, and Server update is controlled in real time to flow scheduling.
When Tianjin wants to carry out flow transmission with Tokyo, due to the most right in now tunnel access/transfer server The stream table answered, disappears so tunnel access/transfer server can be triggered to data transfer request acquisition server transmission Packet-In Breath, the example of parameters of Packet-In message is as shown in table 2.
Table 2
Parameter Src (source IP) Dst (purpose IP) Proto (agreement) Tos (COS)
Example 10.213.204.98 10.189.221.162 17 4
Data transfer request acquisition server after receiving Packet-In message, can according to JSON-RPC 2.0 form to Flow scheduling controls server update, and a kind of possible format sample is as follows:
{"params":{"origin":"95529493015","src":"10.213.204.98","dst":" 10.189.221.162"},"jsonrpc":"2.0","method":"new_demand","id":0}
Flow scheduling controls server and receives the topology more fresh information from network topology acquisition server, and safeguards each bar The matrix of link available bandwidth, the link bandwidth matrix that flow scheduling controller is safeguarded is as shown in table 3；Receive from data simultaneously In request more fresh information, this example of transmission request acquisition server, we use JSON data form to store whole flows Request.[{"from":"TianJin","to":"JiuZhou","src":"10.213.204.98","dst":" 10.189.221.162","demand":30},{"from":"JiuZhou","to":"TianJin","src":" 10.189.221.162","dst":"10.213.204.98","demand":30}]
Table 3
Bandwidth (Mbps) Tianjin Beijing Guangzhou Tokyo Nine divisions of China in remote antiquity
Tianjin 90 20
Beijing 90 85 73
Guangzhou 25 85 60
Tokyo 75 65 85
Nine divisions of China in remote antiquity 90
There is the transmission request of two flows in the present embodiment, respectively from Tianjin to nine divisions of China in remote antiquity, from nine divisions of China in remote antiquity to Tianjin, each request needs Want the bandwidth of 30Mbps.Meeting message transmission rate sum less than under conditions of link available bandwidth, please for each flow Ask the transmission path calculating optimum.
10.213.204.98 → Tianjin → Beijing → Tokyo → nine divisions of China in remote antiquity → 10.189.221.162
10.189.221.162 → nine divisions of China in remote antiquity → Tokyo → Beijing → nine divisions of China in remote antiquity → 10.213.204.98
Tunnel access/the transfer server utilizing OpenFlow agreement relevant on transmission link issues stream table.
In order to verify that can above-mentioned link meet the data transfer request of two-way 30Mbps flow rate, we use Dvping/dvmcast measures the packet loss of link when sending 30Mbps data traffic, and around-the clock bandwidth measurement result is such as Shown in Fig. 4.
The elephant flow transmission dispatching method based on tunnel of the present embodiment, it is possible on the Internet done one's best, root Transmit elephant data on flows efficiently according to current network condition, and ensure the reliability that flow transmits.
The present invention also provides for a kind of elephant flow transmitting and scheduling system based on tunnel, including: tunnel access server, tunnel Road transfer server, private address distribution server, network topology acquisition server, data transfer request acquisition server and stream Amount scheduling controlling server；
Described tunnel access server, for sending first every the first preset time period to private address distribution server Request, for described private address distribution server application unique private address section；
Described private address distribution server, for safeguarding, according to described first request, the private address network segment pre-build Data base, and unique private address section of described tunnel access server distribution it is sent as to described tunnel access server；
Described tunnel access server, each flow sends equipment/flow and receives equipment all by tunnel access server Access the Internet, be additionally operable to according to described private address distribution server be its distribution private address section, for described tunnel The flow that access server connects sends equipment/flow and receives equipment distribution IP address；
Described tunnel access server, be additionally operable to every the second preset time period measure its with tunnel transfer server based on The link bandwidth in the tunnel of different agreement, and set up the tunnel between itself and the tunnel transfer server of link bandwidth maximum；
Described tunnel transfer server, is additionally operable to safeguard the tunnel list pre-build, and services to network topology collection Device sends tunnel and sets up message；
Described network topology acquisition server, for receiving after described tunnel sets up message, builds according to described tunnel Vertical message safeguards tunnel topology information and the tunnel type of network, and by the tunnel topology information of network and tunnel type in real time to Flow scheduling controls server update；
Described tunnel access server and tunnel transfer server, being additionally operable to send equipment at described flow has data to wait to lead to When crossing tunnel access server, tunnel transfer server and the tunnel transmission extremely described flow reception equipment set up, to data Transmission request acquisition server transmitted traffic transmission request；
Described data transfer request acquisition server, is used for gathering tunnel access server and tunnel transfer server sends Flow transmission request, by described flow transmission request be sent to flow scheduling control server；
Described flow scheduling controls server, for tunnel topology information, tunnel type and described flow according to network Transmission request, calculates optimal transmission paths for the transmission request of each flow, and issues stream table to build described optimal transmission Path, completes data transmission.
The elephant flow transmitting and scheduling system based on tunnel of the present embodiment, optimizes link circuit resource utilization rate, it is achieved network The flexible control of flow transmission, improves the extensibility of system, according to current network condition on the Internet done one's best Efficient transmission elephant data on flows, and ensure the reliability that flow transmits.
The elephant flow transmitting and scheduling system based on tunnel of the present embodiment, with the skill of embodiment of the method shown in earlier figures 1 Art scheme is corresponding, may be used for performing the technical scheme of embodiment of the method shown in earlier figures 1, and it realizes principle and technique effect Similar, here is omitted.
Those skilled in the art are it should be appreciated that embodiments herein can be provided as method, system or computer program Product.Therefore, the reality in terms of the application can use complete hardware embodiment, complete software implementation or combine software and hardware Execute the form of example.And, the application can use at one or more computers wherein including computer usable program code The upper computer program product implemented of usable storage medium (including but not limited to disk memory, CD-ROM, optical memory etc.) The form of product.
The application is with reference to method, equipment (system) and the flow process of computer program according to the embodiment of the present application Figure and/or block diagram describe.It should be understood that can the most first-class by computer program instructions flowchart and/or block diagram Flow process in journey and/or square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided Instruction arrives the processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce A raw machine so that the instruction performed by the processor of computer or other programmable data processing device is produced for real The device of the function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame now.
These computer program instructions may be alternatively stored in and computer or other programmable data processing device can be guided with spy Determine in the computer-readable memory that mode works so that the instruction being stored in this computer-readable memory produces and includes referring to Make the manufacture of device, this command device realize at one flow process of flow chart or multiple flow process and/or one square frame of block diagram or The function specified in multiple square frames.
These computer program instructions also can be loaded in computer or other programmable data processing device so that at meter Perform sequence of operations step on calculation machine or other programmable devices to produce computer implemented process, thus at computer or The instruction performed on other programmable devices provides for realizing at one flow process of flow chart or multiple flow process and/or block diagram one The step of the function specified in individual square frame or multiple square frame.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely to a reality Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating Relation or order in any this reality.And, term " includes ", " comprising " or its any other variant are intended to Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that Including process, method, article or the equipment of described key element there is also other identical element.Term " on ", D score etc. refers to The orientation shown or position relationship, for based on orientation shown in the drawings or position relationship, are for only for ease of the description present invention and simplification Describe rather than indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and behaviour Make, be therefore not considered as limiting the invention.Unless otherwise clearly defined and limited, term " install ", " being connected ", " connect " and should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can be It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two The connection of element internal.For the ordinary skill in the art, can understand that above-mentioned term is at this as the case may be Concrete meaning in invention.
In the description of the present invention, illustrate a large amount of detail.Although it is understood that, embodiments of the invention can To put into practice in the case of there is no these details.In some instances, it is not shown specifically known method, structure and skill Art, in order to do not obscure the understanding of this description.Similarly, it will be appreciated that disclose to simplify the present invention and help to understand respectively One or more in individual inventive aspect, above in the description of the exemplary embodiment of the present invention, each of the present invention is special Levy and be sometimes grouped together in single embodiment, figure or descriptions thereof.But, should be by the method solution of the disclosure Release in reflecting an intention that i.e. the present invention for required protection requires than the feature being expressly recited in each claim more Many features.More precisely, as the following claims reflect, inventive aspect is less than single reality disclosed above Execute all features of example.Therefore, it then follows claims of detailed description of the invention are thus expressly incorporated in this detailed description of the invention, The most each claim itself is as the independent embodiment of the present invention.It should be noted that in the case of not conflicting, this Embodiment in application and the feature in embodiment can be mutually combined.The invention is not limited in any single aspect, also It is not limited to any single embodiment, is also not limited to these aspects and/or the combination in any of embodiment and/or displacement.And And, can be used alone each aspect of the present invention and/or embodiment or with other aspects one or more and/or its implement Example is used in combination.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered Row equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology The scope of scheme, it all should be contained in the middle of the claim of the present invention and the scope of description.

Claims (10)

1. an elephant flow transmission dispatching method based on tunnel, it is characterised in that including:
Tunnel access server sends the first request every the first preset time period to private address distribution server, for institute State private address distribution server application unique private address section；
Private address distribution server safeguards, according to described first request, the private address network segment data base pre-build, and to institute State tunnel access server and be sent as unique private address section of described tunnel access server distribution；
Tunnel access server according to described private address distribution server be its distribution private address section, for described tunnel The flow that access server connects sends equipment/flow and receives equipment distribution IP address；
Tunnel access server measures itself and tunnel transfer server tunnel based on different agreement every the second preset time period Link bandwidth, and set up the tunnel between the tunnel transfer server that itself and link bandwidth are maximum；
Tunnel transfer server safeguards the tunnel list pre-build, and disappears to network topology acquisition server transmission tunnel foundation Breath；
Network topology acquisition server is receiving after described tunnel sets up message, sets up message according to described tunnel and safeguards network Tunnel topology information and tunnel type, and the tunnel topology information of network and tunnel type are controlled clothes to flow scheduling in real time Business device updates；
Sending equipment at described flow has data to treat by tunnel access server, tunnel transfer server and the tunnel set up When transmission to described flow receives equipment, tunnel access server and tunnel transfer server service to data transfer request collection The transmission request of device transmitted traffic；
Data transfer request acquisition server gathers the flow transmission of tunnel access server and the transmission of tunnel transfer server please Ask, the transmission request of described flow is sent to flow scheduling and controls server；
Flow scheduling controls server tunnel topology information, tunnel type and the transmission request of described flow according to network, for often The transmission request of one flow calculates optimal transmission paths, and issues stream table to build described optimal transmission paths, completes data Transmission.
Method the most according to claim 1, it is characterised in that the parameter field carried in described first request includes: tunnel The gateway MAC address of road access server, the gateway ip address of tunnel access server, the IP address of tunnel access server, The MAC Address of tunnel access server, the subnet mask of tunnel access server；Wherein, the MAC of described tunnel access server Address is major key；
Field in described private address network segment data base, including: the gateway MAC address of tunnel access server, tunnel access The gateway ip address of server, the IP address of tunnel access server, the MAC Address of tunnel access server, tunnel access clothes The business subnet mask of device, the private address section of distribution and renewal private address section timestamp.
Method the most according to claim 2, it is characterised in that described private address distribution server please according to described first Ask and safeguard private address network segment data base, and be sent as the access server distribution of described tunnel to described tunnel access server Unique private address section, including:
After described private address distribution server receives described first request, whether inquiry private address network segment data base deposits Entry at the MAC Address of described tunnel access server；
If not existing, then distribute unique private address section for described tunnel access server and be sent to described tunnel access clothes Business device, is stored in the private address section distributed for described tunnel access server in described private address network segment data base simultaneously；
If existing, then it will described private address network segment data base be the private address of described tunnel access server distribution Section is sent to described tunnel access server, updates the renewal private address section timestamp field of described entry simultaneously.
Method the most according to claim 3, it is characterised in that described tunnel access server every preset time period to Before private address distribution server sends the first request, described method also includes:
Private address distribution server entry in the 3rd preset time period scans described private address network segment data base, if The timestamp distance current time stamp of a certain entry more than predetermined threshold value, is then deleted this entry, and is reclaimed distribution in this entry Private address section.
Method the most according to claim 1, it is characterised in that described different agreement, including: udp protocol, Transmission Control Protocol or GRE protocol.
Method the most according to claim 1, it is characterised in that message is set up in described tunnel, including: the initial joint in tunnel The kind in point, terminal node and tunnel.
Method the most according to claim 6, it is characterised in that described method also includes:
Tunnel transfer server refreshes the tunnel list set up every the 4th preset time period, if finding, tunnel disconnects, Then send tunnel teardown message to network topology acquisition server, described tunnel teardown message, including: tunnel start node, Terminal node and the kind in tunnel.
Method the most according to claim 1, it is characterised in that the parameter field bag carried in the transmission request of described flow Include: source IP address, purpose IP address, agreement and COS；
Correspondingly, described data transfer request acquisition server collection tunnel access server and tunnel transfer server send Flow transmission request, is sent to flow scheduling by the transmission request of described flow and controls server, including:
Described data transfer request acquisition server gathers the flow of tunnel access server and the transmission of tunnel transfer server and passes Defeated request, extracts the source IP address in the transmission request of described flow and purpose IP address；
Described data transfer request acquisition server according to the entry in described private address network segment data base by described source IP ground Location and purpose IP address are converted to the corresponding private ip network segment；
The transmission request of described flow is stored in the form of two tuples and to pre-build by described data transfer request acquisition server In data transfer request list, described two tuples include: privately owned source IP network section and privately owned purpose IP network section；
When described data transfer request list changes, described change is updated by described data transfer request acquisition server Server is controlled to described flow scheduling.
Method the most according to claim 1, it is characterised in that described flow scheduling controls the server tunnel according to network Topology information, tunnel type and the transmission request of described flow, calculate optimal transmission paths for the transmission request of each flow, and Issue stream table to build described optimal transmission paths, complete data transmission, including:
Described flow scheduling controls server and updates network topological diagram G=according to tunnel topology information and the tunnel type of network (V, E), wherein, V is the set on the summit in network topology, and E is the set on the limit being made up of the summit in network topology；
Described flow scheduling controls server update flow transmission request D, and the number of flow transmission request is n=| D |；
Some alternative path P are found for the transmission request of each flowi
Utilize linear programming algorithm, with the minimum object function of global traffic transmission delay, for the transmission request of each flow from Some alternative paths are selected an optimal transmission paths；
After solving optimal transmission paths, the tunnel that OpenFlow agreement is relevant in described optimal transmission paths is utilized to access clothes Business device/tunnel transfer server issues stream table to build described optimal transmission paths, completes data transmission；
Wherein, described object function is:
min Σ i = 1 n Σ j = 1 | P i | ( Σ e ∈ P i , j RTT e ) · δ i , j
Wherein, n is the number of flow transmission request, PiFor distribute for the transmission request of i-th flow | Pi| individual alternative path collection Closing, e is alternative path Pi,jIn a limit, RTTeFor flow at the transmission delay of limit e, δi,jRepresent that the transmission of i-th flow please Seeking Truth no selection j-th strip alternative path is as optimal transmission paths；
The restrictive condition of described object function includes:
It is only each request and chooses an optimal path；
Flow through whole speed sums link less than this limit on a certain bar limit Bandwidth；
Wherein,Represent whether limit e belongs to alternative path Pi,j, DiFor the bandwidth demand of i-th flow transmission request, BWeFor The available bandwidth of limit e.
10. an elephant flow transmitting and scheduling system based on tunnel, it is characterised in that including: tunnel access server, tunnel Transfer server, private address distribution server, network topology acquisition server, data transfer request acquisition server and flow Scheduling controlling server；
Described tunnel access server, please for sending first every the first preset time period to private address distribution server Ask, for described private address distribution server application unique private address section；
Described private address distribution server, for safeguarding, according to described first request, the private address network segment data pre-build Storehouse, and unique private address section of described tunnel access server distribution it is sent as to described tunnel access server；
Described tunnel access server, each flow is sent equipment/flow reception equipment and is all accessed by tunnel access server The Internet, is additionally operable to according to the private address section that described private address distribution server is its distribution, for accessing with described tunnel The flow that server connects sends equipment/flow and receives equipment distribution IP address；
Described tunnel access server, is additionally operable to measure it from tunnel transfer server based on different every the second preset time period The link bandwidth in the tunnel of agreement, and set up the tunnel between itself and the tunnel transfer server of link bandwidth maximum；
Described tunnel transfer server, is additionally operable to safeguard the tunnel list pre-build, and sends out to network topology acquisition server Tunnel is sent to set up message；
Described network topology acquisition server, for receiving after described tunnel sets up message, sets up according to described tunnel and disappears Breath safeguards tunnel topology information and the tunnel type of network, and by the tunnel topology information of network and tunnel type in real time to flow Scheduling controlling server update；
Described tunnel access server and tunnel transfer server, being additionally operable to send equipment at described flow has data tunnel to be passed through When road access server, tunnel transfer server and tunnel transmission to the described flow set up receive equipment, transmit to data Request acquisition server transmitted traffic transmission request；
Described data transfer request acquisition server, for gathering tunnel access server and the stream of tunnel transfer server transmission Amount transmission request, is sent to flow scheduling by the transmission request of described flow and controls server；
Described flow scheduling controls server, for the tunnel topology information according to network, tunnel type and the transmission of described flow Request, calculates optimal transmission paths for the transmission request of each flow, and issues stream table to build described optimal transmission paths, Complete data transmission.
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