CN108123819A - A kind of emulation mode of actual situation network seamless fusion - Google Patents
A kind of emulation mode of actual situation network seamless fusion Download PDFInfo
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Abstract
The invention discloses a kind of emulation modes of actual situation network seamless fusion, are related to network analog simulation technical field, solve the problems, such as that the network packet transmission of the virtual reality fusion based on OpenStack platforms is opaque, the method includes the steps：Build OpenStack cloud computing platform Essential Environments；Destination virtual network is built, the router of independent research is used in virtual network；Flow table configuration script is run, makes the data packet between actual situation network can be with transparent transmission；Connection equipment in kind forms the network of virtual reality fusion with virtual network.The emulation mode that the present invention is merged by providing a kind of actual situation network seamless, realizes the network environment for building a transparent virtual reality fusion, is assessed available for network security assessment and computer system security.
Description
Technical field
The present invention relates to network analog simulation technical field, more particularly to a kind of emulation side of actual situation network seamless fusion
Method.
Background technology
Network research has been based on three kinds of network analog, network simulation and object test bed major technique exhibitions for a long time
It opens, but network modeling technique is difficult to ensure that the fidelity of network node reproduction, and networks simulation technology is in scale again with limitation
Property, and object test bed is also difficult to support large scale network due to the shortcomings of its is of high cost, very flexible, poor assay reproducibility
The research of behavior, so associated specialist proposes the network research environment of virtual reality fusion, with reference to the advantages of above-mentioned three kinds of technologies, energy
Enough to support the extensive, network experiment of high fidelity, which is increasingly becoming mainstream.
Representatives of the OpenStack as cloud computing platform, it is powerful, diversified virtual network can be built, but
It is that the internetwork communication of actual situation will pass through router namespace progress address conversions, for scientific research, this is caused
Data packet transmission is opaque, causes network simulation not true to nature.
Open vSwitch (OVS) are the virtual switches for operating in virtual platform, can be that the endpoint of dynamic change carries
For Layer2 switching function.Each bridge operates the data packet flowed through according to its flow table rule in OVS, and each end on OVS
Mouth is according to vlan tag transceiving data bags.If the port on OVS is configured with vlan tag, this port can only be received with this
The data packet of vlan tag, and the flow for flowing into OVS by the port, this port can stamp the end for data packet automatically
The vlan tag of mouth institute band, for the flow by port outflow OVS, this port can be automatically deleted data packet institute band
vlan tag.OVS can be used in OpenStack as virtual switch, a network is established in OpenStack, OVS can be
The unique vlan tag of the network configuration one, achieve the purpose that isolation network.This of OVS is controlled according to flow table and vlan tag
The characteristics of system and forwarding data packet, administrator can be facilitated to be managed to reach control to flow table with OpenFlow agreements
The purpose of flow direction of data packet, isolation network, traffic monitoring.
The content of the invention
It, can be by present invention solves the technical problem that be to provide for a kind of emulation mode of actual situation network seamless fusion
OpenStack platforms realize the actual situation network integration, while ensure the transparent transmission of data packet.
Technical proposal that the invention solves the above-mentioned problems is as follows：
S1：Build OpenStack cloud computing platform Essential Environments, wherein virtual switch uses OVS, between each node
Communication is using Gre modes, and network node should be mutual indepedent with control node, and independent network node is interconnected as actual situation and taken
Business device；The environment put up includes a control node, a network node and several calculate nodes；
S2：Destination virtual network is built, which includes OpenStack virtual cloud hosts, and OpenvSwitch is virtual
Interchanger and the virtual router of independent development give up the virtual router that OpenStack is carried；
S3：The flow table configuration script write from primary python is run, the function of the script is to make data packet in network section
Router namespace are skipped in point, so as to avoid address conversion, realize data packet transparent transmission, detailed configuration process
It is：
(1) the neutron databases of remote inquiry control node；
(2) if in database there are flowInfo tables if be directly entered in next step, otherwise establish the table, and in present networks
Flow table is added on br-ex in node OVS, the flow that all virtual networks enter is made to be sent to network in kind；
(3) use interior Connection inquiring, inquire about the ports tables of database and subnets tables, and with the number in flowInfo tables
According to comparison, IP address, the name of id DHCP interfaces corresponding with its of Unrecorded network in flowInfo tables are searched, if looked for
It arrives, into next step, is otherwise directly entered (7)；
(4) according to the ovs-db of interface name query present networks node obtained in the previous step, the interface is found, obtains its institute
In the vlan tag of network；
(5) id of network, IP address and vlan tag and customized nodename are stored in flowInfo tables；
(6) two flow table rules are established for each network br-int in network node OVS according to obtained information, it is corresponding
In IP agreement and ARP protocol, the function of this two flow table rules is to make all flows come in from network in kind all according to data
The vlan tag of the source address modification data packet of bag；Its command format is " ovs-ofctl add-flow br-int table=
0, priority=10, dl_type=0x0800, in_port=x, vlan_tci=0x0000, nw_src=y, actions
=mod_vlan_vid:Z, NORMAL ", wherein x are the number of the interface of br-int connections br-ex, and dl_type refers to protocol class
Type, 0x0800 are IP agreements, and 0x0806 is ARP protocol, and nw_src is source data packet address, and y is changed to the net of current operation
Network address, z are vlan tag；
(7) the subnets tables in database are inquired about, the net in flowInfo is obtained using the IP address of network as keyword
The network that network node exists and is not present in subnets, obtains the IP address of these networks；
(8) row where deleting these IP address from flowInfo tables；
(9) according to the network ip address obtained in (1), corresponding flow table rule, order are deleted on present networks node
Form is " ovs-ofctl del-flows br-int table=0, in_port=x, ip, nw_dst=y " and " ovs-
Ofctl del-flows br-int table=0, in_port=x, arp, arp_spa=y " wherein x are br-int connections
The number of the interface of br-ex, y are the IP address of network；
S4：Connection equipment in kind forms the network of virtual reality fusion with virtual network.
The OVS virtual switches are made of the different bridge of each function, and wherein br-tun charge tunnels communicate,
Br-ex is responsible for and network communication in kind, br-int are responsible for transmitting packets to each virtual machine or bridge.
The virtual router of the independent development refers to the virtual cloud host created with linux system mirror image, this is virtual
Cloud host not as data pack receiving and transmitting source host and destination host, but be used as router be used for forward data packet so that not
Virtual machine in same virtual network can communicate.
The basic OpenStack frameworks refer to that only only there are one connections there are one network node and each network node
The framework of the network interface card of outer net；
The network interface card that the network interface card of the connection outer net is connected for network node with network in kind.
Beneficial effects of the present invention are as follows：
1st, the actual situation network integration avoids network modeling technique and networks simulation technology lacking in fidelity and scale
Point, the shortcomings that also avoiding object test bed of high cost, poor availability；
2nd, network in kind can select arbitrary virtual network to be attached as needed, and machine in kind need to only change the IP of itself
Address can be connected to arbitrary virtual network, whole network environment flexibly configurable；
3rd, the network of the virtual reality fusion of structure has skipped NAT address conversions, entire communication process is saturating when being communicated
It is bright, promote the verisimilitude of actual situation network integration emulation.
Description of the drawings
Fig. 1 is a kind of flow chart of the emulation mode of actual situation network seamless fusion；
Fig. 2 automatically configures flow table rule flow chart for script；
Fig. 3 is network topological diagram used in embodiment of the present invention；
Fig. 4 is the result schematic diagram of the verification transparency；
Fig. 5 is the data packet flow graph of the actual situation network of structure；
Fig. 6 is that machine in kind passes through network node and the topological diagram of virtual router unicom virtual machine.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is described further.
The flow chart of present embodiment is as shown in Figure 1, technical solution is as follows：
S1：Build OpenStack cloud computing platform Essential Environments, wherein virtual switch uses OVS, between each node
Communication is using Gre modes, and network node should be independent with control node, and independent network node is mutual as actual situation
Join server, the environment put up includes a control node, a network node and several calculate nodes；
S2：Destination virtual network is built, which includes OpenStack virtual cloud hosts, and OpenvSwitch is virtual
Interchanger and the virtual router of independent development give up the virtual router that OpenStack is carried；
S3：The flow table configuration script write from primary python is run, the function of the script makes data packet in network node
Router namespace are inside skipped, so as to avoid address conversion, realize that data packet transmission is transparent, the flow chart of flow table configuration is such as
Shown in Fig. 2, detailed configuration process is：
(1) the neutron databases of remote inquiry control node；
(2) if in database there are flowInfo tables if be directly entered in next step, otherwise establish the table, and in present networks
Flow table is added on br-ex in node OVS, the flow that all virtual networks enter is made to be sent to network in kind；
(3) use interior Connection inquiring, inquire about the ports tables of database and subnets tables, and with the number in flowInfo tables
According to comparison, IP address, the name of id DHCP interfaces corresponding with its of Unrecorded network in flowInfo tables are searched, if looked for
It arrives, into next step, is otherwise directly entered (7)；
(4) according to the ovs-db of interface name query present networks node obtained in the previous step, the interface is found, obtains its institute
In the vlan tag of network；
(5) id of network, IP address and vlan tag and customized nodename are stored in flowInfo tables；
(6) two flow table rules are established for each network br-int in network node OVS according to obtained information, it is corresponding
In IP agreement and ARP protocol, the function of this two flow table rules is to make all flows come in from network in kind all according to data
The vlan tag of the source address modification data packet of bag；Its command format is " ovs-ofctl add-flow br-int table=
0, priority=10, dl_type=0x0800, in_port=x, vlan_tci=0x0000, nw_src=y, actions
=mod_vlan_vid:Z, NORMAL ", wherein x are the number of the interface of br-int connections br-ex, and dl_type refers to protocol class
Type, 0x0800 are IP agreements, and 0x0806 is ARP protocol, and nw_src is source data packet address, and y is changed to the net of current operation
Network address, z are vlan tag；
(7) the subnets tables in database are inquired about, the net in flowInfo is obtained using the IP address of network as keyword
The network that network node exists and is not present in subnets, obtains the IP address of these networks；
(8) row where deleting these IP address from flowInfo tables；
(9) according to the network ip address obtained in (1), corresponding flow table rule, order are deleted on present networks node
Form is " ovs-ofctl del-flows br-int table=0, in_port=x, ip, nw_dst=y " and " ovs-
Ofctl del-flows br-int table=0, in_port=x, arp, arp_spa=y " wherein x are br-int connections
The number of the interface of br-ex, y are the IP address of network；
S4：Connection equipment in kind forms the network of virtual reality fusion with virtual network.
Above-mentioned technical proposal, in step sl, the Essential Environment built in this example include a control node, a net
Network node and two calculate nodes, the network interface card IP address of control node connection management net is 192.168.1.31, and network node connects
The IP address for taking over reason net and the network interface card of tunnel net is respectively 192.168.1.11 and 10.0.0.11,1 connection management of calculate node
The IP address of net and the network interface card of tunnel net is respectively 192.168.1.21 and 10.0.0.21,2 connection management net of calculate node and tunnel
The IP address of the network interface card of road net is respectively 192.168.1.22 and 10.0.0.22.
Above-mentioned technical proposal in step s 2, is illustrated, IP address is respectively exemplified by establishing 3 networks
192.168.100.0/24,172.18.146.0/24 and 10.10.1.0/24 establishes 4 virtual cloud hosts VM1, VM2, VM3
And VM4, IP address are respectively 192.168.100.3,192.168.100.4,172.18.146.3 and 172.18.146.4.
Above-mentioned technical proposal, in step s3, the environment established with reference to the present embodiment is in network node Run Script, specifically
Method is：
Due to being to put up first time Run Script after environment, so flowInfo tables can be created, and added on br-ex
The flow table of one all flow of letting pass, order are：Ovs-ofctl add-flow br-ex priority=9, in_port
=2, actions=strip_vlan, NORMAL, meaning are to perform removal vlan to all flows entered from No. 2 ports
The operation of tag simultaneously normally forwards, in the present embodiment, the port that No. 2 ports are br-ex connections br-int；It is empty after being configured so that
Equipment in kind can be reached by all network nodes by intending the data packet that network is sent.
Next configuration br-int on flow table because 192.168.100.0/24,172.18.146.0/24 and
10.10.1.0/24 three networks are not all added to flowInfo tables, within Connection inquiring obtain three networks information,
The vlan tag that the machine ovs-db obtains three networks are inquired about again, are respectively 2,3,4；Then the relevant information of acquisition and make by oneself
The nodename of justice is stored in flowInfo tables together, is in the present embodiment network node self-defined title " Network1 "；Pin
The order for adding flow table for network 192.168.100.0/24 to IP agreement should be specific to the present embodiment：ovs-ofctl add-
Flow br-int table=0, priority=10, dl_type=0x0800, in_port=2, vlan_tci=
0x0000, nw_src=192.168.100.0/24, actions=mod_vlan_vid:2, NORMAL, the meaning of this flow table
It is that all IP data packets entered from No. 2 ports are performed with operation that modification vlan tag are 2 and is normally forwarded, wherein No. 2 ends
Mouth corresponds to the interface of br-int connections br-ex in the present embodiment；For other agreements and network add flow table need to only change including
Parameter including protocol type, source data packet address, vlan tag；After the completion of configuration work, void is entered by equipment in kind
Purpose virtual machine can be sent to by intending the flow of network.
The flow table rule of deleted network can be deleted by script, and script is obtained using the IP address of network as keyword
The network that the network node exists and is not present in subnets in flowInfo, that is, search deleted network；In the present embodiment
Middle deletion network 10.10.1.0/24, script are inquired after the network is deleted, and delete the network institute from flowInfo tables first
It is expert at, is then ordered with order from the corresponding flow table rule of present networks knot removal as " ovs-ofctl del-flows br-
Int table=0, in_port=2, ip, nw_dst=10.10.1.0/24 ", this order are deleted for network 10.10.1.0/24
Flow table rule except being directed to IP agreement, then with order " ovs-ofctl del-flows br-int table=0, in_
Port=2, arp, arp_spa=10.10.1.0/24 " delete the order for ARP protocol；So far, it is all with network
10.10.1.0/24 relevant flow table information is all deleted and finished.
In above-mentioned technical proposal, in step s 4,1 host in kind is connected to the network interface card of network node connection outer net,
The IP address of machine in kind can be configured according to experiment demand, it is necessary to machine in kind connects some virtual network, only need to be machine in kind
IP address be configured to the IP of this network.In the present embodiment, machine in kind is first connected to 192.168.100.0/24,
IP address is configured to 192.168.100.100.
The topology of the network of the virtual reality fusion built is as shown in figure 3, the net of the virtual reality fusion based on above-mentioned steps structure
The deployable various testing research work of network.
It is deployable but be not limited to following test job based on the present embodiment：
(1) machine in kind for being 192.168.100.100 with IP address and ping orders are performed mutually with the virtual machine of network,
Then the IP address of machine in kind is changed to 172.18.146.100 and performs ping orders mutually again and with the virtual machine of network, tied
Fruit shows that the machine and virtual machine in kind of consolidated network can interconnect；
(2) it is purpose address using traceroute orders using VM1 on machine in kind, its routed path of the results show is certain
Only 1 jumps, it was demonstrated that the transparency, the results are shown in Figure 4, and data packet flow graph is as shown in Figure 5；
(3) after adding in virtual router, belonging to the machine and virtual machine in kind of heterogeneous networks can be connected by virtual router
Logical, topology as shown in fig. 6, checking routing item number with traceroute orders, jump, and meets expection by the results show 3.
It is above-mentioned the experimental results showed that, the emulation mode of actual situation network seamless proposed by the present invention fusion can realize one it is transparent
Virtual reality fusion network environment, it is opaque to solve in the actual situation Interconnection Environment based on OpenStack platforms data packet transmission
The problem of.
Above-mentioned specific embodiment is merely to illustrate the present invention, and not limitation of the present invention, in the common skill in this field
In the knowledge that art personnel possess, it can also be made a variety of changes on the premise of present inventive concept is not departed from.
Claims (2)
1. a kind of emulation mode of actual situation network seamless fusion, which is characterized in that comprise the following steps：
S1：Build OpenStack cloud computing platform Essential Environments, wherein virtual switch uses OVS, the communication between each node
Using Gre modes, and network node should be independent with control node, and independent network node is interconnected as actual situation and taken
Business device, the environment put up include a control node, a network node and several calculate nodes；
S2：Destination virtual network is built, which includes OpenStack virtual cloud hosts, and Open vSwitch are virtually handed over
It changes planes and based on support RIP, OSPF, the virtual router of bgp protocol constructed by virtualization technology, gives up OpenStack
The virtual router carried；
S3：The flow table configuration script write from primary python is run, the function of the script is to make data packet in network node
Router namespace are skipped, so as to avoid address conversion, realize data packet transparent transmission；
S4：Connection equipment in kind forms the network of virtual reality fusion with virtual network.
2. the method as described in claim 1, which is characterized in that the configuration step of the flow table configuration script is：
(1) the neutron databases of remote inquiry control node；
(2) if in database there are flowInfo tables if be directly entered in next step, otherwise establish the table, and in present networks node
Flow table is added in OVS on br-ex, the flow that all virtual networks enter is made to be sent to network in kind；
(3) use interior Connection inquiring, inquire about the ports tables of database and subnets tables, and with the data pair in flowInfo tables
Than, IP address, the name of id DHCP interfaces corresponding with its of Unrecorded network in lookup flowInfo tables, if it is found,
Into in next step, otherwise it is directly entered (7)；
(4) according to the ovs-db of interface name query present networks node obtained in the previous step, the interface is found, obtains net where it
The vlan tag of network；
(5) id of network, IP address and vlan tag and customized nodename are stored in flowInfo tables；
(6) two flow table rules are established for each network br-int in network node OVS according to obtained information, corresponding to IP
Agreement and ARP protocol, the function of this two flow table rules are to make all flows come in from network in kind all according to data packet
The vlan tag of source address modification data packet；Its command format for " ovs-ofctl add-flow br-int table=0,
Priority=10, dl_type=0x0800, in_port=x, vlan_tci=0x0000, nw_src=y, actions=
mod_vlan_vid:Z, NORMAL ", wherein x are the number of the interface of br-int connections br-ex, and dl_type refers to protocol type,
0x0800 is IP agreement, and 0x0806 is ARP protocol, and nw_src is source data packet address, y is changed to the network of current operation
Location, z are vlan tag；
(7) the subnets tables in database are inquired about, the network section in flowInfo is obtained using the IP address of network as keyword
The network that point exists and is not present in subnets, obtains the IP address of these networks；
(8) row where deleting these IP address from flowInfo tables；
(9) according to the network ip address obtained in (1), corresponding flow table rule, command format are deleted on present networks node
For " ovs-ofctl del-flows br-int table=0, in_port=x, ip, nw_dst=y " and " ovs-ofctl
Del-flows br-int table=0, in_port=x, arp, arp_spa=y " wherein x are br-int connections br-ex's
The number of interface, y are the IP address of network.
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| CN113726637B (en) * | 2021-09-09 | 2022-11-01 | 华云数据控股集团有限公司 | Network traffic transparent transmission method and device based on cloud platform and storage medium |
| CN114301656A (en) * | 2021-12-23 | 2022-04-08 | 北京赛宁网安科技有限公司 | Virtual-real combination system and method for network attack and defense platform |
| CN114301656B (en) * | 2021-12-23 | 2023-10-27 | 北京赛宁网安科技有限公司 | Virtual-real combination system and method for network attack and defense platform |
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Application publication date: 20180605 Assignee: Softpole Network Technology (Beijing) Co.,Ltd. Assignor: Jiangnan University Contract record no.: X2023980034541 Denomination of invention: A Simulation Method for Seamless Fusion of Virtual and Real Networks Granted publication date: 20201016 License type: Common License Record date: 20230410 |
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