CN106301921B - Elephant flow transmission dispatching method and system based on tunnel - Google Patents
Elephant flow transmission dispatching method and system based on tunnel Download PDFInfo
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- CN106301921B CN106301921B CN201610678063.1A CN201610678063A CN106301921B CN 106301921 B CN106301921 B CN 106301921B CN 201610678063 A CN201610678063 A CN 201610678063A CN 106301921 B CN106301921 B CN 106301921B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- 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
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- 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
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- 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
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- 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
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- 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
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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
- H04L45/02—Topology update or discovery
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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
- H04L45/12—Shortest path evaluation
- H04L45/123—Evaluation of link metrics
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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
- 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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Abstract
The present invention provides elephant flow transmission dispatching method and system based on tunnel, and method includes: that 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 establish and link bandwidth maximum tunnel transfer server between tunnel；Tunnel transfer server establishes message to network topology acquisition server hair tunnel, it is made to safeguard network tunnel topology and tunnel type and update in real time to flow scheduling control server；The flow transmission that data transfer request acquisition server acquisition tunnel access server and tunnel transfer server are sent requests and is issued flow scheduling control server；Flow scheduling control server is that the transmission request of each flow calculates optimal transmission paths, and issues flow table and complete data transmission to build optimal transmission paths according to tunnel topology, tunnel type and flow transmission request.Energy high efficiency of transmission elephant data on flows of the present invention simultaneously guarantees transmission reliability.
Description
Technical field
The present invention relates to network communication technology field more particularly to a kind of elephant flow transmission dispatching methods based on tunnel
And system.
Background technique
Internet of today is an extremely complex system, runs diversified application, such as Instant Messenger thereon
Letter and Remote Video Conference etc.；These application be also not quite similar to the bandwidth demand of transmission link, from 10Kbps to
100Mbps etc..There may be a plurality of transmission paths between destination node for source node, but since internet is based on destination IP
(Internet Protocol, the agreement interconnected between network) is grouped forwarding, and the message for having identical destination IP can only
It is transmitted along identical link.Since internet provides the service done one's best, simultaneously because port speed constraint, link congestion
Etc. reasons, if current transmission link is unable to satisfy demand of the elephant flow to bandwidth, will lead to network application can not be just
Often work.
Tunnel encapsulation technology is the mode that a kind of infrastructure by using internet transmits data between networks.
The data (or load) transmitted using tunnel can be the data frame or packet of different agreement.Tunnel protocol is by the data of other agreements
Then frame or packet Reseal to be sent by tunnel.New frame head provides routing iinformation, and different frame heads can be along different chains
Road is forwarded, to make full use of the bandwidth resources of the multilink between two nodes.
In terms of flow scheduling, traditional way is administrator's manual configuration routing table, undoubtedly increases O&M in this way
Cost reduces scalability.Software defined network (Software Defined Network, abbreviation SDN) technology is using collection
The flow scheduling of Chinese style by flow monitoring and automatically configures, optimizes from global visual angle to network flow, reduce network
Manual intervention simplifies the difficulty of network O&M, improves scalability.
In consideration of it, on the internet done one's best, how elephant flow efficiently transmitted according to current network condition
Data, and guarantee that the reliability of flow transmission becomes the current technical issues that need to address.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of elephant flow transmission dispatching method based on tunnel and is
System, can efficiently transmit elephant data on flows according to current network condition, and guarantee to flow on the internet done one's best
Measure the reliability of transmission.
In a first aspect, the present invention provides a kind of elephant flow transmission dispatching method based on tunnel, comprising:
Tunnel access server sends the first request to private address distribution server every the first preset time period, is used for
To the unique private address section of the private address distribution server application；
The private address network segment database that private address distribution server is pre-established according to the first request maintenance, and
The unique private address section distributed for the tunnel access server is sent to the tunnel access server；
Tunnel access server according to the private address distribution server be its distribution private address section, for it is described
Flow sending device/flow receiving device of tunnel access server connection distributes IP address；
Tunnel access server measures it with tunnel transfer server based on different agreement every the second preset time period
The link bandwidth in tunnel, and establish its tunnel between the maximum tunnel transfer server of link bandwidth；
Tunnel transfer server safeguards the tunnel list pre-established, and sends tunnel to network topology acquisition server and build
Vertical message；
Network topology acquisition server establishes message maintenance after receiving the tunnel and establishing message, according to the tunnel
The tunnel topology information and tunnel type of network, and by the tunnel topology information and tunnel type of network in real time to flow scheduling control
Control server updates；
There are data to wait for through tunnel access server, tunnel transfer server and established in the flow sending device
When tunnel transmission to the flow receiving device, tunnel access server and tunnel transfer server are acquired to data transfer request
The transmission request of server transmitted traffic；
Data transfer request acquisition server acquires the flow that tunnel access server and tunnel transfer server are sent and passes
Flow transmission request is sent to flow scheduling control server by defeated request；
Flow scheduling control server is transmitted according to the tunnel topology information, tunnel type and the flow of network requests,
Optimal transmission paths are calculated for the transmission request of each flow, and issue flow table to build the optimal transmission paths, are completed
Data transmission.
Optionally, in first request parameter field that carries include: 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, tunnel
The subnet mask of road access server；Wherein, the MAC Address of the tunnel access server is major key；
Field in the private address network segment database, comprising: gateway MAC address, the tunnel of tunnel access server
The gateway ip address of access server, the IP address of tunnel access server, tunnel access server MAC Address, tunnel connect
Enter the subnet mask of server, the private address section of distribution and updates private address section timestamp.
Optionally, the private address distribution server safeguards private address network segment database according to first request,
And the unique private address section distributed for the tunnel access server is sent to the tunnel access server, comprising:
After the private address distribution server receives first request, inquiring in private address network segment database is
It is no that there are the entries of the MAC Address of the tunnel access server；
If it does not exist, then it distributes unique private address section for the tunnel access server and is sent to the tunnel and connect
Enter server, while the private address section distributed for the tunnel access server is stored in the private address network segment database
In；
It if it exists, then will be the privately owned of the tunnel access server distribution in the private address network segment database
Address field is sent to the tunnel access server, while updating the update private address section timestamp field of the entry.
Optionally, first is sent to private address distribution server in the tunnel access server every preset time period
Before request, the method also includes:
Private address distribution server scans the item in the private address network segment database every third preset time period
Mesh deletes the entry if the timestamp of a certain entry is greater than preset threshold apart from current time stamp, and recycles in the entry and divide
The private address section matched.
Optionally, the different agreement, comprising: udp protocol, Transmission Control Protocol or GRE protocol.
Optionally, message is established in the tunnel, comprising: the type of the start node in tunnel, terminal node and tunnel.
Optionally, the method also includes:
Tunnel transfer server refreshes established tunnel list every the 4th preset time period, connects if discovery tunnel disconnects
It connects, then sends tunnel teardown message, the tunnel teardown message, comprising: the starting section in tunnel to network topology acquisition server
The type of point, terminal node and tunnel.
Optionally, the parameter field carried in the flow transmission request includes: source IP address, purpose IP address, agreement
And service type；
Correspondingly, the data transfer request acquisition server acquisition tunnel access server and tunnel transfer server hair
Flow transmission request is sent to flow scheduling control server by the flow transmission request sent, comprising:
The stream that the data transfer request acquisition server acquisition tunnel access server and tunnel transfer server are sent
Amount transmission request extracts source IP address and purpose IP address in the flow transmission request；
The data transfer request acquisition server is according to the entry in the private address network segment database by the source
IP address and purpose IP address are converted to corresponding privately owned IP network section；
Flow transmission request is stored in the form of binary group and is built in advance by the data transfer request acquisition server
In vertical data transfer request list, the binary group includes: privately owned source IP network segment and privately owned purpose IP network section；
When the data transfer request list changes, the data transfer request acquisition server is by the variation
Update the flow scheduling control server.
Optionally, the flow scheduling control server is according to the tunnel topology information, tunnel type and the stream of network
Amount transmission request calculates optimal transmission paths for the transmission request of each flow, and issues flow table to build the optimal biography
Complete data transmission in defeated path, comprising:
The flow scheduling control server updates network topological diagram G according to the tunnel topology information and tunnel type of network
=(V, E), wherein V is the set on the vertex in network topology, and E is the set on the side being made of the vertex in network topology；
The flow scheduling control server more new flow transmission request D, the number of flow transmission request is n=| D |；
Request, which is transmitted, for each flow finds several alternative paths
It is asked using linear programming algorithm with the minimum objective function of global traffic transmission delay for the transmission of each flow
It asks and selects an optimal transmission paths from several alternative paths；
After solving optimal transmission paths, using OpenFlow agreement, into the optimal transmission paths, relevant tunnel is connect
Enter server/tunnel transfer server and issue flow table to build the optimal transmission paths, completes data transmission；
Wherein, the objective function are as follows:
Wherein, n is the number of flow transmission request, PiFor what is distributed for i-th of flow transmission request | Pi| a alternative path
Set, e are alternative path Pi,jIn a line, RTTeTransmission delay for flow in side e, δi,jIndicate i-th of flow transmission
Whether request selects j-th strip alternative path as optimal transmission paths；
The restrictive condition of the objective function includes:
Only an optimal path is chosen in each request；
The sum of whole rates of certain a line are flowed through less than the side
Link bandwidth；
Wherein,Indicate whether side e belongs to alternative path Pi,j, DiThe bandwidth demand of request is transmitted for i-th of flow,
BWeFor the available bandwidth of side e.
Second aspect, the present invention provide a kind of elephant flow transmitting and scheduling system based on tunnel, comprising:
Tunnel access server, tunnel transfer server, private address distribution server, network topology acquisition server,
Data transfer request acquisition server and flow scheduling control server；
The tunnel access server, for sending first to private address distribution server every the first preset time period
Request is used for the unique private address section of the private address distribution server application；
The private address distribution server, the private address network segment for being pre-established according to the first request maintenance
Database, and the unique private address section distributed for the tunnel access server is sent to the tunnel access server；
The tunnel access server, each flow sending device/flow receiving device pass through tunnel access server
Internet is accessed, the private address section according to the private address distribution server for its distribution is also used to, is and the tunnel
Flow sending device/flow receiving device of access server connection distributes IP address；
The tunnel access server, is also used to measure it every the second preset time period and is based on tunnel transfer server
The link bandwidth in the tunnel of different agreement, and establish its tunnel between the maximum tunnel transfer server of link bandwidth；
The tunnel transfer server is also used to safeguard the tunnel list pre-established, and acquires and service to network topology
Device sends tunnel and establishes message；
The network topology acquisition server, for being built according to the tunnel after receiving the tunnel and establishing message
The tunnel topology information and tunnel type of vertical message maintenance network, and by the tunnel topology information and tunnel type of network in real time to
Flow scheduling control server updates；
The tunnel access server and tunnel transfer server are also used to have data to wait leading in the flow sending device
When crossing tunnel access server, tunnel transfer server and tunnel transmission to the flow receiving device established, to data
Transmission request acquisition server transmitted traffic transmission request；
The data transfer request acquisition server is sent for acquiring tunnel access server and tunnel transfer server
Flow transmit request, by the flow transmission request be sent to flow scheduling control server；
The flow scheduling control server, for the tunnel topology information, tunnel type and the flow according to network
Transmission request calculates optimal transmission paths for the transmission request of each flow, and issues flow table to build the optimal transmission
Data transmission is completed in path.
As shown from the above technical solution, the elephant flow transmission dispatching method and system of the invention based on tunnel, can
On the internet done one's best, elephant data on flows is efficiently transmitted according to current network condition, and guarantees that flow transmits
Reliability.
Detailed description of the invention
Fig. 1 is the flow diagram for the elephant flow transmission dispatching method based on tunnel that one embodiment of the invention provides；
Fig. 2 is that topological diagram is tested used by one embodiment of the invention；
Fig. 3 is available bandwidth measurement result of the Tianjin to Beijing based on UDP, TCP, gre tunneling in embodiment illustrated in fig. 2；
It is that flow transmits 24 hours bandwidth measurement results for requesting the transmission path built that Fig. 4, which is in embodiment illustrated in fig. 2,.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 shows the process signal of the elephant flow transmission dispatching method based on tunnel of one embodiment of the invention offer
Figure, the elephant flow transmission dispatching method based on tunnel of the present embodiment is transmitted based on following elephant flows based on tunnel to be adjusted
Degree system, as 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 to private address distribution server every the first preset time period,
For to the unique private address section of the private address distribution server application.
In a particular application, first request can be based on http protocol POST mode, carry in first request
Parameter field may include: tunnel access server gateway MAC (Media Access Control or Medium
Access Control, media access control) address, the gateway ip address of tunnel access server, tunnel access server
IP address, the MAC Address of tunnel access server and subnet mask of tunnel access server etc.；Wherein, the tunnel access
The MAC Address of server is major key.
It is asked it is understood that step 101 sends first to private address distribution server every the first preset time period
The purpose asked is: in case private address network segment is recycled because of time-out by private address distribution server.
102, the private address network segment data that private address distribution server is pre-established according to the first request maintenance
Library, and the unique private address section distributed for the tunnel access server is sent to the tunnel access server.
In a particular application, the field in the private address network segment database may include: 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, the step 102 can specifically include:
After the private address distribution server receives first request, inquiring in private address network segment database is
It is no that there are the entries of the MAC Address of the tunnel access server；
If it does not exist, then it distributes unique private address section for the tunnel access server and is sent to the tunnel and connect
Enter server, while the private address section distributed for the tunnel access server is stored in the private address network segment database
In；
It if it exists, then will be the privately owned of the tunnel access server distribution in the private address network segment database
Address field is sent to the tunnel access server, while updating the update private address section timestamp field of the entry.
In a particular application, the method can also include:
Private address distribution server scans the item in the private address network segment database every third preset time period
Mesh deletes the entry if the timestamp of a certain entry is greater than preset threshold apart from current time stamp, and recycles in the entry and divide
The private address section matched.
103, tunnel access server according to the private address distribution server be its distribution private address section, for
Flow sending device/flow receiving device of the tunnel access server connection distributes IP address.
It should be noted that in a particular application, each flow sending device/flow receiving device is accessed by tunnel and is taken
Business device accesses internet.
104, tunnel access server measures it every the second preset time period and is based on different associations from tunnel transfer server
The link bandwidth in the tunnel of view, and establish its tunnel between the maximum tunnel transfer server of link bandwidth.
Wherein, the different agreement may include: User Datagram Protocol (User Datagram Protocol, abbreviation
UDP), transmission control protocol (Transmission Control Protocol, abbreviation TCP) or Generic Routing Encapsulation
Tunnel protocols, the present embodiment such as (Generic Routing Encapsulation, abbreviation GRE) are not limited,
It may include other tunnel protocols.
Specifically, at step 104, it can choose and makeMaximum tunnel transfer server s establishes q type tunnel
Road；
Wherein s ∈ S is the set of whole tunnels transfer server, and q ∈ I is the type set in whole tunnels,It indicates
Available bandwidth measurement result of the link based on q type tunnel between tunnel access server and tunnel transfer server s.
105, tunnel transfer server safeguards the tunnel list pre-established, and sends tunnel to network topology acquisition server
Message is established in road.
Wherein, message is established in the tunnel, may include: the type of the start node in tunnel, terminal node and tunnel
Deng.
In a particular application, the method can also include:
Tunnel transfer server refreshes established tunnel list every the 4th preset time period, connects if discovery tunnel disconnects
It connects, then sends tunnel teardown message to network topology acquisition server；
Wherein, the tunnel teardown message, comprising: the type of the start node in tunnel, terminal node and tunnel.
106, network topology acquisition server establishes message according to the tunnel after receiving the tunnel and establishing message
Safeguard the tunnel topology information and tunnel type of network, and by the tunnel topology information and tunnel type of network in real time to flow tune
Control server is spent to update.
107, data wait for through tunnel access server, tunnel transfer server and built in the flow sending device
When vertical tunnel transmission to the flow receiving device, tunnel access server and tunnel transfer server are to data transfer request
The transmission request of acquisition server transmitted traffic.
Wherein, the parameter field carried in flow transmission request include: source IP address, purpose IP address, agreement and
Service type etc..
In a particular application, the flow transmission request is that the data packet in OpenFlow agreement is passed to Packet-In class
Type message.
108, the stream that data transfer request acquisition server acquisition tunnel access server and tunnel transfer server are sent
Flow transmission request is sent to flow scheduling control server by amount transmission request.
In a particular application, the parameter field that carries includes: source IP address, destination IP in the flow transmission request
When location, agreement and service type, correspondingly, the step 108 be may particularly include:
The stream that the data transfer request acquisition server acquisition tunnel access server and tunnel transfer server are sent
Amount transmission request extracts source IP address and purpose IP address in the flow transmission request；
The data transfer request acquisition server is according to the entry in the private address network segment database by the source
IP address and purpose IP address are converted to corresponding privately owned IP network section；
Flow transmission request is stored in the form of binary group and is built in advance by the data transfer request acquisition server
In vertical data transfer request list, the binary group includes: privately owned source IP network segment and privately owned purpose IP network section；
When the data transfer request list changes, the data transfer request acquisition server is by the variation
Update the flow scheduling control server.
109, flow scheduling control server is asked according to the transmission of the tunnel topology information, tunnel type and the flow of network
It asks, calculates optimal transmission paths for the transmission request of each flow, and issue flow table to build the optimal transmission paths, it is complete
It is transmitted at data.
In a particular application, the step 109 can specifically include:
The flow scheduling control server updates network topological diagram G according to the tunnel topology information and tunnel type of network
=(V, E), wherein V is the set on the vertex in network topology, and E is the set on the side being made of the vertex in network topology；
The flow scheduling control server more new flow transmission request D, the number of flow transmission request is n=| D |；
Request, which is transmitted, for each flow finds several alternative path Pi,
It is asked using linear programming algorithm with the minimum objective function of global traffic transmission delay for the transmission of each flow
It asks and selects an optimal transmission paths from several alternative paths；
After solving optimal transmission paths, using OpenFlow agreement, into the optimal transmission paths, relevant tunnel is connect
Enter server/tunnel transfer server and issue flow table to build the optimal transmission paths, completes data transmission；
Wherein, the objective function are as follows:
Wherein, n is the number of flow transmission request, PiFor what is distributed for i-th of flow transmission request | Pi| a alternative path
Set, e are alternative path Pi,jIn a line, RTTeTransmission delay for flow in side e, δi,jIndicate i-th of flow transmission
Whether request selects j-th strip alternative path as optimal transmission paths；
The restrictive condition of the objective function includes:
Only an optimal path is chosen in each request；
The sum of whole rates of certain a line are flowed through less than the side
Link bandwidth；
Wherein,Indicate whether side e belongs to alternative path Pi,j, DiThe bandwidth demand of request is transmitted for i-th of flow,
BWeFor the available bandwidth of side e.
The elephant flow transmission dispatching method based on tunnel of the present embodiment, by widely interconnecting netting index in distribution on global
According to deployment tunnel transfer server in center IDC and cloud platform；It is each to establish the tunnel connection based on agreements such as UDP, TCP, GRE
Tunnel access/transfer server；In flow scheduling control server according to the tunnel of the whole network access/transfer server topology with
And flow transmission request calculates optimal transmission path using the available bandwidth of tunnel links as restrictive condition for each request,
Flow table is issued using OpenFlow agreement, builds flow transmission path.This have the advantage that using widely distributed
Cloud Server create a plurality of types of tunnels, help to break through the rate limit between local operator and Autonomous Domain；It utilizes
Flow scheduling control server and OpenFlow agreement build transmission link, help to optimize link circuit resource utilization rate, realize net
The flexible control of network flow transmission, improves the scalability of system.The present embodiment can on the internet done one's best, according to
Current network condition efficiently transmits elephant data on flows, and guarantees the reliability of flow transmission.
It is understood that operator is for flow scheduling and distributed denial of service attack (Distributed
Denial of service attack, abbreviation DDoS) prevention the considerations of, rate is often made according to the type of message protocol
Limitation.And the present invention is finally chosen maximum using available bandwidth by link available bandwidth of the measurement based on various protocols
Protocol type builds transmission tunnel, so as to break through the flow restriction rule of operator, maximumlly utilizes network link
Carry out data transmission.
Internet is made of numerous Autonomous Domains, the flow across Autonomous Domain is transmitted, operator is for operation cost
The considerations of, certain limitation can be made to the transmission rate across Autonomous Domain flow；The present embodiment is by being distributed in all over the world
IDC and cloud platform in dispose multiple tunnel transfer servers and carry out flow transfers, further evade the flow restriction of operator.
The present embodiment using SDN by data plane and 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 help efficiently to utilize link circuit resource, simultaneously
Increase the scalability of system.
It is following by taking experiment topological diagram shown in Fig. 2 as an example, in data transfer request acquisition server, network in the present embodiment
SDN controller RYU is disposed on topological acquisition server, flow scheduling control server；Access server, tunnel transfer in tunnel
Open vSwitch and OpenVPN are disposed on server；HTTP server and MySQL are disposed on private address distribution server
Database.
When the starting of tunnel access server, first can be sent to private address distribution server using http protocol and asked
It asks, is used for the unique private IP address section of the private address distribution server application, such as 10.213.204.96/29.Institute
The first request is stated using POST mode, design parameter field may include: 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 the tunnel access server is major key.
Specifically, tunnel access server can send the first request to private address distribution server every 10 minutes.
Private_ip_allocation table (i.e. private address network segment data are pre-created in private address distribution server
Library) store the private address section of distribution, field information may include:
IP, the IP address of tunnel access server, it may be possible to private net address, such as 192.168.31.99；
MAC, MAC Address, the major key of tunnel access server；
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 the private_ip_allocation database table is as shown in table 1.
Table 1
When there is new private address request to arrive, whether the allocated private address section excessively is first looked for, if it is,
It directly returns to the private address section of distribution and updates TIMESTAMP field；If it is not, then redistributing new private address section simultaneously
New assignment record is added in database table.
If certain record TIMESTAMP be more than all not update 1 hour, we if delete this record, so as to time
The private address section that contracture is matched.
After tunnel access server obtains the private address section of distribution, dynamic host configuration protocol (Dynamic can be opened
Host Configuration Protocol, abbreviation DHCP) service, equipment is sent or received with distributing IP for the flow of access
Location.
Tunnel access server be located at Guangzhou, Beijing and Tokyo tunnel transfer server carry out respectively based on UDP,
The bandwidth test in the tunnels such as TCP, GRE, what Fig. 3 was indicated is positioned at the tunnel access server of Tianjin and in Pekinese tunnel
Turn the bandwidth test result between server.
According to the measurement result of bandwidth, the tunnel access server of final Tianjin be located at Pekinese tunnel transfer server
Establish the tunnel TCP；Similarly the tunnel access server positioned at nine divisions of China in remote antiquity finally establishes GRE with the tunnel transfer server for being located at Tokyo
Tunnel.
No matter which kind of tunnel is successfully established, and the tunnel information that tunnel transfer server requires to establish is with JSON-RPC
2.0 formats 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 tunnel access/transfer server unique identification, and numerical computation method is by 16 systems
MAC Address be converted to the integer character strings of 10 systems.
Network topology acquisition server safeguards tunnel access/transfer server tunnel topology situation in whole network, and
It is updated in real time to flow scheduling control server.
When Tianjin is wanted to carry out flow transmission with Tokyo, since there is no right in tunnel access at this time/transfer server
The flow table answered disappears so can trigger tunnel access/transfer server and send Packet-In to data transfer request acquisition server
Breath, the example of parameters of Packet-In message are as shown in table 2.
Table 2
| Parameter | Src (source IP) | Dst (destination IP) | Proto (agreement) | Tos (service type) |
| Example | 10.213.204.98 | 10.189.221.162 | 17 | 4 |
Data transfer request acquisition server after receiving Packet-In message, can according to 2.0 format of JSON-RPC to
Flow scheduling control server updates, 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 control server receives the topological more new information from network topology acquisition server, and safeguards each item
The link bandwidth matrix of the matrix of link available bandwidth, the maintenance of flow scheduling controller is as shown in table 3；It receives simultaneously and comes from data
The request more new information of request acquisition server is transmitted, we store whole flows using JSON data format in this example
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 |
The present embodiment is there are two flow transmission requests, and respectively from Tianjin to nine divisions of China in remote antiquity, from nine divisions of China in remote antiquity to Tianjin, each request is needed
Want the bandwidth of 30Mbps.Under conditions of meeting the sum of message transmission rate no more than link available bandwidth, asked for each flow
It asks and calculates optimal transmission path.
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
Using OpenFlow agreement, relevant tunnel access/transfer server issues flow table on transmission link.
The data transfer request of two-way 30Mbps flow rate can be met in order to verify above-mentioned link, we use
The packet loss of link when dvping/dvmcast measurement sends 30Mbps data traffic, 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, can be on the internet done one's best, root
Elephant data on flows is efficiently transmitted according to current network condition, and guarantees the reliability of flow transmission.
The elephant flow transmitting and scheduling system based on tunnel that the present invention also provides a kind of, comprising: tunnel access server, tunnel
Road transfer server, private address distribution server, network topology acquisition server, data transfer request acquisition server and stream
Measure scheduling controlling server；
The tunnel access server, for sending first to private address distribution server every the first preset time period
Request is used for the unique private address section of the private address distribution server application；
The private address distribution server, the private address network segment for being pre-established according to the first request maintenance
Database, and the unique private address section distributed for the tunnel access server is sent to the tunnel access server；
The tunnel access server, each flow sending device/flow receiving device pass through tunnel access server
Internet is accessed, the private address section according to the private address distribution server for its distribution is also used to, is and the tunnel
Flow sending device/flow receiving device of access server connection distributes IP address；
The tunnel access server, is also used to measure it every the second preset time period and is based on tunnel transfer server
The link bandwidth in the tunnel of different agreement, and establish its tunnel between the maximum tunnel transfer server of link bandwidth；
The tunnel transfer server is also used to safeguard the tunnel list pre-established, and acquires and service to network topology
Device sends tunnel and establishes message；
The network topology acquisition server, for being built according to the tunnel after receiving the tunnel and establishing message
The tunnel topology information and tunnel type of vertical message maintenance network, and by the tunnel topology information and tunnel type of network in real time to
Flow scheduling control server updates；
The tunnel access server and tunnel transfer server are also used to have data to wait leading in the flow sending device
When crossing tunnel access server, tunnel transfer server and tunnel transmission to the flow receiving device established, to data
Transmission request acquisition server transmitted traffic transmission request；
The data transfer request acquisition server is sent for acquiring tunnel access server and tunnel transfer server
Flow transmit request, by the flow transmission request be sent to flow scheduling control server；
The flow scheduling control server, for the tunnel topology information, tunnel type and the flow according to network
Transmission request calculates optimal transmission paths for the transmission request of each flow, and issues flow table to build the optimal transmission
Data transmission is completed in path.
The elephant flow transmitting and scheduling system based on tunnel of the present embodiment optimizes link circuit resource utilization rate, realizes network
The flexible control of flow transmission, improves the scalability of system, according to current network condition on the internet done one's best
Efficient transmission elephant data on flows, and guarantee the reliability of flow transmission.
The elephant flow transmitting and scheduling system based on tunnel of the present embodiment, the skill with embodiment of the method shown in earlier figures 1
Art scheme is corresponding, can be used for executing the technical solution of embodiment of the method shown in earlier figures 1, implementing principle and technical effect
Similar, details are not described herein again.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.Term " on ", "lower" etc. refer to
The orientation or positional relationship shown is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplifies
Description, rather than the device or element of indication or suggestion meaning must have a particular orientation, constructed and grasped with specific orientation
Make, therefore is not considered as limiting the invention.Unless otherwise clearly defined and limited, term " installation ", " connected ",
" connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood at this as the case may be
Concrete meaning in invention.
In specification of the invention, numerous specific details are set forth.Although it is understood that the embodiment of the present invention can
To practice without these specific details.In some instances, well known method, structure and skill is not been shown in detail
Art, so as not to obscure the understanding of this specification.Similarly, it should be understood that disclose in order to simplify the present invention and helps to understand respectively
One or more of a inventive aspect, in the above description of the exemplary embodiment of the present invention, each spy of the invention
Sign is grouped together into a single embodiment, figure, or description thereof sometimes.However, should not be by the method solution of the disclosure
Release is in reflect an intention that i.e. the claimed invention requires more than feature expressly recited in each claim
More features.More precisely, as the following claims reflect, inventive aspect is less than single reality disclosed above
Apply all features of example.Therefore, it then follows thus claims of specific embodiment are expressly incorporated in the specific embodiment,
It is wherein each that the claims themselves are regarded as separate embodiments of the invention.It should be noted that in the absence of conflict, this
The feature in embodiment and embodiment in application can be combined with each other.The invention is not limited to any single aspect,
It is not limited to any single embodiment, is also not limited to any combination and/or displacement of these aspects and/or embodiment.And
And can be used alone each aspect and/or embodiment of the invention or with other one or more aspects and/or its implementation
Example is used in combination.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.
Claims (10)
1. a kind of elephant flow transmission dispatching method based on tunnel characterized by comprising
Tunnel access server sends the first request to private address distribution server every the first preset time period, is used for institute
State the unique private address section of private address distribution server application；
Private address distribution server is according to the private address network segment database that pre-establishes of the first request maintenance, and to institute
It states tunnel access server and sends the unique private address section distributed for the tunnel access server；
Tunnel access server according to the private address distribution server be its distribution private address section, be and the tunnel
Flow sending device/flow receiving device of access server connection distributes IP address；
Tunnel access server measures its tunnel with tunnel transfer server based on different agreement every the second preset time period
Link bandwidth, and establish its tunnel between the maximum tunnel transfer server of link bandwidth；
Tunnel transfer server safeguards the tunnel list pre-established, and sends tunnel foundation to network topology acquisition server and disappear
Breath；
Network topology acquisition server establishes message maintenance network after receiving the tunnel and establishing message, according to the tunnel
Tunnel topology information and tunnel type, and by the tunnel topology information and tunnel type of network in real time to flow scheduling control take
Business device updates；
There are data to wait for through tunnel access server, tunnel transfer server and the tunnel established in the flow sending device
When being transmitted to the flow receiving device, tunnel access server and tunnel transfer server are acquired to data transfer request and are serviced
The transmission request of device transmitted traffic；
The flow transmission that data transfer request acquisition server acquisition tunnel access server and tunnel transfer server are sent is asked
It asks, flow transmission request is sent to flow scheduling control server；
Flow scheduling control server is transmitted according to the tunnel topology information, tunnel type and the flow of network requests, and is every
One flow transmission request calculates optimal transmission paths, and issues flow table to build the optimal transmission paths, completes data
Transmission.
2. the method according to claim 1, wherein the parameter field carried in first request includes: tunnel
The gateway MAC address of road access server, the gateway ip address of tunnel access server, tunnel access server IP address,
The subnet mask of the MAC Address of tunnel access server, tunnel access server；Wherein, the MAC of the tunnel access server
Address is major key；
Field in the private address network segment database, comprising: 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
Subnet mask, the private address section of distribution and the update private address section timestamp of business device.
3. according to the method described in claim 2, it is characterized in that, the private address distribution server is asked according to described first
Maintenance private address network segment database is sought, and sending to the tunnel access server is what the tunnel access server distributed
Unique private address section, comprising:
After the private address distribution server receives first request, inquires in private address network segment database and whether deposit
In the entry of the MAC Address of the tunnel access server；
If it does not exist, then unique private address section is distributed for the tunnel access server and be sent to the tunnel access clothes
Business device, while the private address section distributed for the tunnel access server being stored in the private address network segment database；
If it exists, then by be in the private address network segment database tunnel access server distribution private address
Section is sent to the tunnel access server, while updating the update private address section timestamp field of the entry.
4. according to the method described in claim 3, it is characterized in that, the tunnel access server every preset time period to
Before private address distribution server sends the first request, the method also includes:
Private address distribution server scans the entry in the private address network segment database every third preset time period, if
The timestamp of a certain entry is greater than preset threshold apart from current time stamp, then deletes the entry, and recycles and distribute in the entry
Private address section.
5. the method according to claim 1, wherein the different agreement, comprising: udp protocol, Transmission Control Protocol or
GRE protocol.
6. the method according to claim 1, wherein message is established in the tunnel, comprising: the starting section in tunnel
The type of point, terminal node and tunnel.
7. according to the method described in claim 6, it is characterized in that, the method also includes:
Tunnel transfer server refreshes established tunnel list every the 4th preset time period, if discovery tunnel disconnects,
Then tunnel teardown message, the tunnel teardown message are sent to network topology acquisition server, comprising: the start node in tunnel,
The type of terminal node and tunnel.
8. the method according to claim 1, wherein the parameter field packet carried in flow transmission request
It includes: source IP address, purpose IP address, agreement and service type；
Correspondingly, the data transfer request acquisition server acquisition tunnel access server and tunnel transfer server are sent
Flow transmission request is sent to flow scheduling control server by flow transmission request, comprising:
The flow that the data transfer request acquisition server acquisition tunnel access server and tunnel transfer server are sent passes
Defeated request extracts source IP address and purpose IP address in the flow transmission request；
The data transfer request acquisition server according to the entry in the private address network segment database by the source IP
Location and purpose IP address are converted to corresponding privately owned IP network section；
The data transfer request acquisition server pre-establishes flow transmission request deposit in the form of binary group
In data transfer request list, the binary group includes: privately owned source IP network segment and privately owned purpose IP network section；
When the data transfer request list changes, the data transfer request acquisition server updates the variation
To the flow scheduling control server.
9. the method according to claim 1, wherein tunnel of the flow scheduling control server according to network
Topology information, tunnel type and flow transmission request calculate optimal transmission paths for the transmission request of each flow, and
Flow table is issued to build the optimal transmission paths, completes data transmission, comprising:
The flow scheduling control server updates network topological diagram G=according to the tunnel topology information and tunnel type of network
(V, E), wherein V is the set on the vertex in network topology, and E is the set on the side being made of the vertex in network topology；
The flow scheduling control server more new flow transmission request D, the number of flow transmission request is n=| D |；
Request, which is transmitted, for each flow finds several alternative paths
Using linear programming algorithm, with the minimum objective function of global traffic transmission delay, for each flow transmission request from
An optimal transmission paths are selected in several alternative paths；
After solving optimal transmission paths, using OpenFlow agreement, into the optimal transmission paths, relevant tunnel access is taken
Business device/tunnel transfer server issues flow table to build the optimal transmission paths, completes data transmission；
Wherein, the objective function are as follows:
Wherein, n is the number of flow transmission request, PiFor i-th of flow transmission request distribution | Pi| a optional path set,
Pi,jFor set PiIn j-th strip alternative path, e be alternative path Pi,jIn a line, RTTeTransmission for flow in side e is prolonged
When, δi,jIndicate whether i-th of flow transmission request selects j-th strip alternative path as optimal transmission paths；
The restrictive condition of the objective function includes:
Only an optimal path is chosen in each request；
Flow through the link that the sum of whole rates of certain a line are less than the side
Bandwidth；
Wherein,Indicate whether side e belongs to alternative path Pi,j, DiFor the bandwidth demand of i-th of flow transmission request, BWeFor
The available bandwidth of side e.
10. a kind of elephant flow transmitting and scheduling system based on tunnel characterized by comprising tunnel access server, tunnel
Transfer server, private address distribution server, network topology acquisition server, data transfer request acquisition server and flow
Scheduling controlling server；
The tunnel access server is asked for sending first to private address distribution server every the first preset time period
It asks, is used for the unique private address section of the private address distribution server application；
The private address distribution server, the private address network segment data for being pre-established according to the first request maintenance
Library, and the unique private address section distributed for the tunnel access server is sent to the tunnel access server；
The tunnel access server, each flow sending device/flow receiving device pass through tunnel access server and access
Internet is also used to the private address section according to the private address distribution server for its distribution, to access with the tunnel
Flow sending device/flow receiving device of server connection distributes IP address；
The tunnel access server is also used 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 establish its tunnel between the maximum tunnel transfer server of link bandwidth；
The tunnel transfer server is also used to safeguard the tunnel list pre-established, and sends out to network topology acquisition server
Tunnel is sent to establish message；
The network topology acquisition server, for being disappeared after receiving the tunnel and establishing message according to tunnel foundation
The tunnel topology information and tunnel type of breath maintenance network, and by the tunnel topology information and tunnel type of network in real time to flow
Scheduling controlling server update；
The tunnel access server and tunnel transfer server are also used to have data tunnel to be passed through in the flow sending device
When road access server, tunnel transfer server and tunnel transmission to the flow receiving device established, transmitted to data
Request the transmission request of acquisition server transmitted traffic；
The data transfer request acquisition server, the stream sent for acquiring tunnel access server and tunnel transfer server
Flow transmission request is sent to flow scheduling control server by amount transmission request；
The flow scheduling control server, for being transmitted according to the tunnel topology information, tunnel type and the flow of network
Request calculates optimal transmission paths for the transmission request of each flow, and issues flow table to build the optimal transmission paths,
Complete data transmission.
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| CN107959820A (en) * | 2017-11-27 | 2018-04-24 | 安徽威斯贝尔智能科技有限公司 | A kind of visual meeting room integrated communication management system |
| CN109146164B (en) * | 2018-08-08 | 2021-09-07 | 清华大学 | Service income improvement method for cloud service provider |
| CN109150597A (en) * | 2018-08-08 | 2019-01-04 | 清华大学 | The bandwidth cost of cloud service-oriented provider reduces method |
| CN112867177B (en) * | 2019-11-27 | 2022-03-18 | 深圳市万普拉斯科技有限公司 | RRC connection regulation method, device and readable storage medium |
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