Shulou(Shulou.com)06/02 Report--

This article briefly introduces the use of the simulator EVE-NG, including the import and operation of Dynamips devices, the import and operation of IOL devices, the import and operation of QEMU devices, the installation of client software, the combination of physical network and virtual network, and so on.

One. Import image

Dynamips is a simulator for simulating Cisco devices released by French Chris Fillot in 2005. It can run standard IOS images. Although this simulator is relatively old, there are still many web workers willing to use it. EVE-NG supports Cisco IOS 1710, 3725 and 7206, which can be downloaded from the Cisco website or the Internet. It is recommended to use WinSCP to upload images to the EVE-NG server. The specific usage of WInSCP is not described. Drag the downloaded .bin file to the server / opt/unetlab/addons/dynamips/ directory, and then rename the file with the suffix changed to .image. Next, modify the permission to ensure that Dynamips has read permission for the image, run SecureCRT or operate directly on the virtual machine, and run the command / opt/unetlab/wrappers/unl_wrapper-a fixpermissions to modify the permission. The next step is to calculate the idle value. Dynamips is a simulator that simulates Cisco's CPU on the x86 platform, so the virtual CPU instruction is translated into instructions that can be executed under x86, and the idle value is used to record when the virtual CPU is not working, so that it can stop translation when it is not working and reduce CPU utilization. The console executes the command dynamips-P 3725 / opt/unetlab/addons/dynamips/ image name, and the simulator loads the image and displays the startup process. Press Ctrl+] key after entering, I key after release, idle value will be calculated, recorded after calculation, and then press Ctrl+] key to return to the console. This image can then be used in the Web interface of EVE-NG.

Since EVE-NG is implemented in a linux-based Ubuntu system, it is important to understand the basics and commands of Linux. I recommend the book "this is how Linux should learn" to understand and learn the basics of Linux.

IOL is the abbreviation of IOS on Linux and can be run on any Linux distribution system based on x86 platform. It supports advanced features of the switch, takes up less resources and starts quickly. IOL is not officially available for download at Cisco, so you need to find your own resources online. Running IOL requires two files, an image with the suffix bin and a license file named iourc, and the iourc is automatically generated by a tool called CiscoIOUKeygen.py. Next, drag two files into / opt/unetlab/addons/iol/bin/, and then modify the permissions / opt/unetlab/wrappers/unl_wrapper-a fixpermissions. After the operation is completed, you can enter the Web interface for testing.

QEMU can help EVE-NG run more virtual devices and complete complex experiments. More and more equipment manufacturers begin to develop and release systems adapted to the KVM environment. EVE-NG can help qcow2 images run more devices and improve playability. EVE-NG requires that the suffix of the QEMU image is qcow2, which is essentially a virtual hard disk file of the operating system, so you can create the image manually. First of all, look for the qcow2 image in the official website of each manufacturer, and drag it into the specified directory. If EVE-NG has requirements for directory and file name, you can check it in the official website http://www.eve-ng.net/documentation/images-table. The next step is to modify the permissions / opt/unetlab/wrappers/unl_wrapper-a fixpermissions.

two。 Integrated client software package

The most important feature of EVE-NG is to use HTML5 to achieve de-client, but after all, the function is only to manage the equipment, such as packet grabbing and other functions can not be achieved, so we need to use the local terminal software to manage the device. EVE-NG officially provides a client-side integration package containing PuTTY, UItravnc and Wireshark, which can be used as long as it is installed and imported into the registry file. Enter the http:// virtual machine ip/files/windows.zip, download the file, decompress and edit wireshark_wrapper.bat, confirm the user name and password, and modify the program path of wireshark, then put the entire UNetLab folder under C:\ Program Files, and run win7_64bit_wireshark.reg registration.

three。 The combination of physical network and virtual network

In EVE-NG, network combination is essential, and bridging technology is needed to achieve this function. Bridging can connect two or more network cards to the same local area network at the logical level, so that virtual devices can access the real physical network with the help of their own physical network cards. There are several options for adding Network to the Lab topology, divided into two categories, Bridge and Cloud, which are displayed as virtual bridges and have different uses. Bridge acts only internally and interconnects node objects, which can be understood as a stupid switch. Cloud0 is the first network card bridged to EVE-NG, and so on. If the virtual device node is connected to the Cloud0, it will be the first network card of the bridge street EVE-NG. There are three network modes in the virtual machine, Bridge uses VMnet0 virtual network card by default, NAT mode uses VMnet8 network card, and Host-Only uses VMnet1 network card. In Bridge mode, both the host and the virtual machine are connected to the VMnet0 network card, and the virtual machine directly sickles the physical network, and accesses the physical network together with the host in the same network segment. DHCP and NAT services are enabled by default in NAT mode. When a virtual machine connected to this mode accesses the physical network, the source address will be translated into the physical network card ip of the host. To achieve physical network access to virtual machines under NAT, port translation needs to be set in the host. Virtual machines in Host-Only mode can communicate with each other, but cannot access the physical network.

The use of EVE-NG is simply introduced here, this simulator is powerful, and more functions need to be studied and explored by yourself.

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