CN108123818A - A kind of emulation mode of the expansible fusion of actual situation network agile - Google Patents
A kind of emulation mode of the expansible fusion of actual situation network agile Download PDFInfo
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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
- H04L41/14—Network analysis or design
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- H—ELECTRICITY
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- 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
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Abstract
The invention discloses a kind of emulation mode of the expansible fusion of actual situation network agile, be related to network analog simulation technical field, solve at present network test research method in the problems of scale, fidelity etc., the method includes the steps：Build OpenStack cloud computing platform Essential Environments；Based on the Essential Environment put up, multiple network nodes are added, the network interface card of polylith connection outer net is added for each network node；Build destination virtual network；Connection equipment in kind and virtual network；Change or addition flow table rule as needed, to achieve the purpose that isolation network and limitation flow.The present invention builds a flexibly configurable, the network environment of expansible virtual reality fusion by providing a kind of emulation mode of the expansible fusion of actual situation network agile, realization, 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 expansible fusion of actual situation network agile
Emulation mode.
Background technology
Network modeling technique, which is based on discrete event simulation technology, can realize extensive, ultra-large network analog, have height
The scalability and exploitation and operating cost of degree are relatively low, are widely used in the research of large scale network at present.But network analog
The shortcomings that technology, is also evident from, and since it is only some functions of simulation system or equipment, therefore, it is difficult to ensure network
The fidelity of node reproduction is difficult to the deployment of supporting network practical application and the duplication of user behavior.
Networks simulation technology introduces real network traffics in virtual network, can emulate whole system or equipment.
Compared with network modeling technique, the network simulation based on virtualization technology can effectively support the duplication of user behavior, so as to provide
More real network environment, but it is slightly inadequate in terms of network simulation scale and network reproduction speed.
Network test bed in kind, which refers to design, studies required reasonable hardware and software environment, and foundation has specific feature
Real network.This method can obtain very true to nature as a result, still of high cost, very flexible, poor availability and uncomfortable
For the research of large scale network behavior；Meanwhile the assay reproducibility of this method is poor.
Representatives of the OpenStack as cloud computing platform, powerful, cooperation virtual switch can build diversified void
Intend network, and convenient, the abundant interface of external offer is provided.The platform is mainly made of 3 class nodes, and control node is responsible for each
The management and control function of node, network node are responsible for providing various network services, and the foundation that calculate node is responsible for virtual machine provides money
Source, OpenStack M versions have been integrated into control node and network node on same node.Basic OpenStack framves
Structure includes a control node, a network node and several calculate nodes, and network node only has one piece to connect outer net
Network interface card, that is to say, that equipment in kind can only be by unique interface access of virtual network, and which greatly limits equipment in kind accesses
The flexibility of virtual network and the autgmentability of the network simulation of virtual reality fusion.
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 with present invention solves the technical problem that be to provide for a kind of emulation mode of the expansible fusion of actual situation network agile
The advantages of effectively abandoning the deficiency of network analog emulation technology and network test bed in kind and combining each, realizes that structure can
The network test environment that flexible configuration, expansible actual situation combine.
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 mode uses Gre, 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：The first step being extended in building based on the Essential Environment put up, is added multiple network nodes, is newly added
The function of the network node added is identical with the function of network node in Essential Environment, these network nodes will be used as actual situation
Interconnected server can realize the extension of the network of virtual reality fusion by them with the multiple equipment in kind of flexible access；
S3：The second step being extended in building adds the network interface card of polylith connection outer net for each network node, and will be new
The network card binding of addition is on the br-ex of OVS, it is not necessary to which, for newly added network card configuration IP address, these network interface cards will all be used as real
The interface of object equipment access of virtual network, multiple outer net network interface cards can realize the access of more extensive, more complicated network in kind；
S4：Destination virtual network is built, which includes OpenStack virtual cloud hosts, what OpenStack was carried
Virtual router and Open vSwitch virtual switches；
S5：Connection equipment in kind forms the network of virtual reality fusion with virtual network；
S6：Flow table rule is configured to ensure that the flow of actual situation network can be forwarded to by all network nodes, first
Need to be ordered in the br-ex of each network node use " ovs-ofctl add-flow br-ex table=0, priority=10,
In_port=x, dl_vlan=y, actions=drop " abandon the process router that fictitious host computer is sent to network in kind
Data packet after the conversion of namespace addresses, the x after in_port are revised as phy-br-ex ends in br-ex according to actual conditions
The number of mouth, which is the port that br-ex is connected with br-int, and the vlan tag that y is public network；Then still
It is so used in br-ex and orders ovs-ofc tl add-flow br-ex table=0, priority=9, in_port=x,
Actions=strip_vlan, no rmal realize that the flow without address conversion that all virtual networks send can be by
Equipment in kind is sent to, likewise, the x after in_port is revised as the volume of phy-br-ex ports in br-ex according to actual conditions
Number；Then for each virtual network order ovs-ofctl add-flow br-int table=0, priority=
10, in_port=x, nw_src=y, actions=mod_vlan_vid:Z, normal realize the bag energy that equipment in kind is sent
It reaches and is normally forwarded to purpose fictitious host computer, the x after wherein in_port represents the number of int-br-ex ports in br-int, should
Port is the port that br-int is connected with br-ex, and y represents the source address of data packet, and z represents y networks in current network node
Vlan tag；The number of br-int middle ports can inquire about to obtain with order ovs-ofctl show br-int, in br-ex
The number of port can inquire about to obtain with order ovs-ofctl show br-ex, and the vlan tag of each network can then use ovs-
Vsctl show are obtained；
S7：For each virtual network, flow table rule is changed or added according to actual needs in OVS, to reach separation net
The purpose of network and limitation flow, the general type of order are：Ovs-ofctl add-flow br-ex table=0,
Priority=10, in_port=x, nw_src=y, actions=z, wherein br-ex represent that this flow table rule will be by
It adds on the br-ex bridges in OVS, br-int or other related bridges, in_port can be changed to according to actual conditions
Data packet is represented into the number of fashionable passed through port, nw_src represents source data packet IP address, can be according to actual conditions
Packet rs destination IP address nw_dst, source data packet MAC Address dl_src, packet rs destination MAC Address dl_dst are changed to,
Actions represents the operation performed after matching flow table, generally can be " output:N " represents to send number from the port that number is n
According to bag, drop represents packet discard.
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 basic OpenStack frameworks refer to that only only there are one connection outer nets there are one network node and network node
Network interface card framework；
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, constructed virtual network has the scalability of height, possesses multiple network nodes and each network node is gathered around
There are the network interface card of multiple connection outer nets, the network of the virtual reality fusion complicated available for structure；
3rd, the server that network node is interconnected as actual situation, the flow of all processes of management and control, by OVS in network node
The configuration of flow table is, it can be achieved that the functions such as isolation network and limitation flow；
4th, 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.
Description of the drawings
Fig. 1 is a kind of flow chart of the emulation mode of the expansible fusion of actual situation network agile；
Fig. 2 is network topological diagram used in embodiment of the present invention；
Fig. 3 is the topological diagram of flow restriction test.
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 mode uses Gre, 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：The first step being extended in building based on the Essential Environment put up, is added multiple network nodes, is newly added
The function of the network node added is identical with the function of network node in Essential Environment, these network nodes will be used as actual situation
Interconnected server can realize the extension of the network of virtual reality fusion by them with the multiple equipment in kind of flexible access；
S3：The second step being extended in building adds the network interface card of polylith connection outer net for each network node, and will be new
The network card binding of addition is on the br-ex of OVS, it is not necessary to which, for newly added network card configuration IP address, these network interface cards will all be used as real
The interface of object equipment access of virtual network, multiple outer net network interface cards can realize the access of more extensive, more complicated network in kind；
S4：Destination virtual network is built, which includes OpenStack virtual cloud hosts, what OpenStack was carried
Virtual router and Open vSwitch virtual switches；
S5：Connection equipment in kind forms the network of virtual reality fusion with virtual network；
S6：Flow table rule is configured to ensure that the flow of actual situation network can be forwarded to by all network nodes, first
Need to be ordered in the br-ex of each network node use " ovs-ofctl add-flow br-ex table=0, priority=10,
In_port=x, dl_vlan=y, actions=drop " abandon the process router that fictitious host computer is sent to network in kind
Data packet after the conversion of namespace addresses, the x after in_port are revised as phy-br-ex ends in br-ex according to actual conditions
The number of mouth, which is the port that br-ex is connected with br-int, and the vlan tag that y is public network；Then still
It is so used in br-ex and orders ovs-ofc tl add-flow br-ex table=0, priority=9, in_port=x,
Actions=strip_vlan, no rmal realize that the flow without address conversion that all virtual networks send can be by
Equipment in kind is sent to, likewise, the x after in_port is revised as the volume of phy-br-ex ports in br-ex according to actual conditions
Number；Then for each virtual network order ovs-ofctl add-flow br-int table=0, priority=
10, in_port=x, nw_src=y, actions=mod_vlan_vid:Z, normal realize the bag energy that equipment in kind is sent
It reaches and is normally forwarded to purpose fictitious host computer, the x after wherein in_port represents the number of int-br-ex ports in br-int, should
Port is the port that br-int is connected with br-ex, and y represents the source address of data packet, and z represents y networks in current network node
Vlan tag；The number of br-int middle ports can inquire about to obtain with order ovs-ofctl show br-int, in br-ex
The number of port can inquire about to obtain with order ovs-ofctl show br-ex, and the vlan tag of each network can then use ovs-
Vsctl show are obtained；
S7：For each virtual network, flow table rule is changed or added according to actual needs in OVS, to reach separation net
The purpose of network and limitation flow, the general type of order are：Ovs-ofctl add-flow br-ex table=0,
Priority=10, in_port=x, nw_src=y, actions=z, wherein br-ex represent that this flow table rule will be by
It adds on the br-ex bridges in OVS, br-int or other related bridges, in_port can be changed to according to actual conditions
Represent the number of data packet entry port, nw_src represents source data packet IP address, can be changed to data according to actual conditions
Bag purpose IP address nw_dst, source data packet MAC Address dl_src, packet rs destination MAC Address dl_dst, actions expression
The operation performed after matching flow table, generally can be " output:N " represents to send data packet, drop tables from the port that number is n
Show packet discard.
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 adds network node, the Essential Environment built in the present embodiment to step S1 in step s 2
Increase a network node, the IP address of the network node connection management net of addition and the network interface card of tunnel net is respectively
And 10.0.0.12 192.168.1.12.Then dhcp_agents_per_ is changed in the neutron.conf of control node
Network=2, it is therefore an objective to allow every network node that can provide DHCP service for the network established, by having in this present embodiment
Two network nodes, so being arranged to 2, true extension build process can determine increased number of network node according to specific requirements
Mesh.
Above-mentioned technical proposal in step s3, can increase arbitrary piece for every network node according to demand and connect outer net
Network interface card；It is the network interface card that each network node adds one piece of connection outer net in the present embodiment, the network interface card of network node connection outer net can
Not configure IP address.
Above-mentioned technical proposal in step s 4, 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.
In above-mentioned technical proposal, in step s 5, four pieces of connections that four hosts in kind are respectively connected to network node are outer
The network interface card of net, wherein there is two network nodes, every network node has the network interface card of two pieces of connection outer nets, and the IP address of machine in kind can
It is configured according to experiment demand, it is necessary to machine in kind connects some virtual network, only the IP address of machine in kind need to be configured to this
The IP of a network.In the present embodiment, machine 1 in kind and machine 3 in kind are connected to network 192.168.100.0/24, IP address
It is each configured to 192.168.100.100 and 192.168.100.101；Machine 2 in kind and machine 4 in kind are connected to network
172.18.146.0/24 IP address is each configured to 172.18.146.100 and 172.18.146.101.
Above-mentioned technical proposal in step s 6, configures flow table and br-ex discarding fictitious host computers is allowed to be sent to network in kind first
Data packet after router namespace addresses convert inquires about to obtain this reality with order ovs-ofctl show br-ex
The number for applying phy-br-ex on br-ex in example is 2, inquires about to obtain public in the present embodiment with order ovs-vsctl show
The vlan tag of network are 1, configuration flow table order ovs-ofctl add-flow br-ex table=0, priority
=10, in_port=2, dl_vlan=1, actions=drop；Then configured still on br-ex flow table make it is all virtual
The flow without address conversion that network is sent can be sent to equipment in kind, configuration flow table order ovs-ofctl
Add-flow br-ex table=0, priority=9, in_port=2, actions=strip_vlan, normal；So
Flow table is configured on br-int for each virtual network afterwards enables the bag that equipment in kind is sent normally to be forwarded to purpose
Fictitious host computer inquires about to obtain the volume of int-br-ex on the br-int in the present embodiment with order ovs-ofctl show br-int
Number for 1, inquire about to obtain the vlan tag of network 192.168.100.0/24 as 2 with order ovs-vsctl show, configure flow table
With order ovs-ofctl add-flow br-int table=0, priority=10, in_port=1, nw_src=
192.168.100.0/24, actions=mod_vlan_vid:2, normal, for network 172.18.146.0/24 and
10.10.1.0/24 also flow table is configured with same method.
Above-mentioned technical proposal, in the step s 7, can be using flow table rule come isolation network and limitation flow；The present embodiment
In, it realizes current limliting in the br-ex of OVS, rule " ovs-ofc tl add-flow br-ex is all added in two network nodes
Table=0, priority=10, in_port=2, nw_src=192.168.100.0/24, actions=output:1”,
Meaning be it is all enter the flow that br-ex and source address are 192.168.100.0/24 from No. 2 ports and all sent from No. 1 port,
The port that wherein No. 2 ports are br-ex connections br-int, No. 1 port are the port of br-ex first piece of outer net network interface card of connection；With
Same method is specified enters br-ex and flow that source address is 172.18.146.0/24 is all sent out from No. 3 ports from No. 2 ports
Go out, No. 3 ports are the port of br-ex second piece of outer net network interface card of connection；After the completion of configuration, the flow difference of two networks is realized
It can only be by the way that network interface card be specified to transmit；In practical operation, port numbers and data packet source address can all be changed as needed, and each
The outer net network interface card quantity of network node is not limited to only two pieces.
The topology of the network of the virtual reality fusion built is as shown in Fig. 2, 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) ping orders are performed mutually with each machine and virtual machine in kind of consolidated network, the results showed that consolidated network
Machine and virtual machine in kind can interconnect；
(2) configuration of flow restriction, connection 192.168.100.100 to No. 1 port of network node 1, connection are combined
172.18.146.100 to No. 3 ports of network node 2, respectively with the mutual ping of fictitious host computer in identical network, as a result show
Show that machine in kind and virtual machine in consolidated network can be with intercommunications, but if the position both exchanged is then unable to intercommunication.
It is above-mentioned the experimental results showed that, the emulation mode of the expansible fusion of actual situation network agile proposed by the present invention can realize one
The network environment of a flexibly configurable, expansible virtual reality fusion.
Flexibility is embodied in：Virtual network, which is based on OpenStack, flexibly to build；Machine in kind can be connected directly to arbitrary virtual
Network need to only be configured to the IP address of machine in kind in respective virtual network；It is configured by flow table and Network Isolation can be achieved
And flow restriction.
Scalability is embodied in：Network node can be built multiple, and each network node can configure polylith connection equipment in kind
Network interface card, machine in kind can be interconnected by the arbitrary outer net network interface card of arbitrary network node and virtual network.
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 (3)
1. a kind of emulation mode of the expansible fusion of actual situation network agile, 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
Mode uses Gre, and network node should be mutual indepedent with control node, and independent network node is as actual situation interconnection services
Device；The environment put up includes a control node, a network node and several calculate nodes；
S2：The first step being extended in building based on the Essential Environment put up, adds multiple network nodes, newly added
The function of network node is identical with the function of network node in Essential Environment, these network nodes will be used as actual situation to interconnect
Server can realize the extension of the network of virtual reality fusion by them with the multiple equipment in kind of flexible access；
S3：The second step being extended in building adds the network interface card of polylith connection outer net for each network node, and will new addition
Network card binding on the br-ex of OVS, it is not necessary to for newly added network card configuration IP address, these network interface cards will all be set as material object
The interface of standby access of virtual network, multiple outer net network interface cards can realize the access of more extensive, more complicated network in kind；
S4：Destination virtual network is built, which includes OpenStack virtual cloud hosts, and OpenStack is carried virtual
Router and Open vSwitch virtual switches；
S5：Connection equipment in kind forms the network of virtual reality fusion with virtual network；
S6：Flow table rule is configured to ensure that the flow of actual situation network can be forwarded to by all network nodes, it first need to be
The br-ex of each network node order " ovs-ofctl add-flow br-ex table=0, priority=10, in_
Port=x, dl_vlan=y, actions=drop " abandon the process router that fictitious host computer is sent to network in kind
Data packet after the conversion of namespace addresses, the x after in_port are revised as phy-br-ex ends in br-ex according to actual conditions
The number of mouth, which is the port that br-ex is connected with br-int, and the vlan tag that y is public network；Then still
It is so used in br-ex and orders ovs-ofctl add-flow br-ex table=0, priority=9, in_port=x,
Actions=strip_vlan, normal realize that the flow without address conversion that all virtual networks send can be by
Equipment in kind is sent to, likewise, the x after in_port is revised as the volume of phy-br-ex ports in br-ex according to actual conditions
Number；Then for each virtual network order ovs-ofctl add-flow br-int table=0, priority=
10, in_port=x, nw_src=y, actions=mod_vlan_vid:Z, normal realize the bag energy that equipment in kind is sent
It reaches and is normally forwarded to purpose fictitious host computer, the x after wherein in_port represents the number of int-br-ex ports in br-int, should
Port is the port that br-int is connected with br-ex, and y represents the source address of data packet, and z represents y networks in current network node
Vlan tag；The number of br-int middle ports can inquire about to obtain with order ovs-ofctl show br-int, in br-ex
The number of port can inquire about to obtain with order ovs-ofctl show br-ex, and the vlan tag of each network can then use ovs-
Vsctl show are obtained；
S7：For each virtual network, change or add according to actual needs flow table rule in OVS, with reach isolation network and
The purpose of flow is limited, the general type of order is：Ovs-ofctl add-flow br-ex table=0, priority=
10, in_port=x, nw_src=y, actions=z, wherein br-ex represent that this flow table rule will be added in OVS
Br-ex bridges on, br-int can be changed to according to actual conditions or other related bridges, in_port represent data packet
Into the number of fashionable passed through port, nw_src represents source data packet IP address, can be changed to data according to actual conditions
Bag purpose IP address nw_dst, source data packet MAC Address dl_src, packet rs destination MAC Address dl_dst, actions expression
The operation performed after matching flow table, generally can be " output:N " represents to send data packet, drop tables from the port that number is n
Show packet discard.
2. the method as described in claim 1, which is characterized in that all network nodes are as actual situation interconnected server, ring
The internetwork flow of all actual situations can pass through actual situation interconnected server in border, and flow table rule are configured on actual situation interconnected server
The functions such as isolation network and limitation flow then can be achieved.
3. the method as described in claim 1, which is characterized in that environment possesses more actual situation interconnected servers and connects outer net with polylith
Network interface card, the network of complicated virtual reality fusion can be built.
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| 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: WEIHAI TIANZHIWEI NETWORK SPACE SAFETY TECHNOLOGY CO.,LTD. Assignor: Jiangnan University Contract record no.: X2023980033218 Denomination of invention: A simulation method for flexible and scalable fusion of virtual and real networks Granted publication date: 20201009 License type: Common License Record date: 20230303 |