Step By Step - Installation, Configuration & Usage Guide of GNS3
Installation of GNS3
The installation of GNS3 is completed above.
Because all necessary things are packaged, this is recommended for Windows in "win32-all-in-one.exe".
Next is pushed.
I Agree is pushed.
Next is pushed as it is.
When WinPCAP is installed, the check is removed.
When Dynamips is installed, the check is removed.
Next is pushed.
The installation folder is selected, and Next is pushed.
The installation of WinPcap starts. Next is pushed as it is.
Next is pushed.
I Agree is pushed.
This screen goes out only when the previous version of WinPcap is installed.
The previous version is uninstalled by Yes.
Finish is pushed.
Finish is pushed.
Setup of GNS3
- GNS3 of desktop is double-clicked, and GNS3 is started.
- When "GNS3" is started, such a screen is displayed.
Dynamips is set in [1], and the setting related to the IOS image is done by [2].
First of all, [1] is pushed.
- [1] is pushed, and the place of the telnet client is specified for the terminal command column again. When Tera Term is used, it is input, "Installation directory > \ttermpro.exe %h %p of < Tera Term", and pushes the application button.
The directory that preserves the configuration file is specified for the project directory column.
The directory that preserves IOS is specified for the IOS/PIX directory column.
A left Dynamips menu is pushed.
- The test button is pushed as it is for WindowsXP/Vista.
After "C:\Program Files\GNS3\Dynamips\dynamips-w2000.exe" is selected by the program passing, the test button is pushed for Windows2000.
It is confirmed to be displayed as Dynamips successfully started, and pushes the OK button. (The change of capture and the Pemu menu is unnecessary. )
- Next, [2] is pushed.
- The place of the IOS image is input to the image file column, and what suitable for the IOS image in the platform and the model column is selected.
It is confirmed to push the preservation button, and to have been added to the IOS image column when the input is completed, and pushes the shutting button.
- The OK button is pushed.
Setting of IdlePC
When you arrange a router and just start, a CPU sticks to 100%, and movement becomes very slow. Therefore setting of idlepc is necessary to lower a CPU rate of use. Setting comes to be easily possible in GNS3. (As for the case to be good as 100%, this setting is unnecessary)
- Only one router is arranged, and the router is started by right-clicking > "Start".
The icon of 【 outline of the topology 】 is virescent when succeeding in the start.
- It right-clicks in the router, and "Idle PC" is selected.
- The value is selected and the OK button is pushed. The value is chosen referring to the following because there are two or more choices usually.
- When there are two or more candidates, it gives priority to the one with * sign and it selects it.
- *Either is selected when there are two or more signs.
- *Either is selected when there is no sign.
When CPU utilization doesn't fall by the selected value, Idle PC is executed again and the same work is done.
- The value set here is reflected in the 【IDLE PC】 column in "IOS image and [haipa-baiza]" window.
When Cisco3745 etc. are used, it is necessary to do a similar operation because it is necessary to do this operation at each IOS image.
Operation Method of GNS3
It explains a basic manner of operation until make - starting of the network block diagram by GNS3.
Here, it explains the procedure to make a simple network that exists in the figure below.
(1) Making of connection diagram
(2) Start
The explanation of the manner of operation of GNS3 ends above.
Here, it explains the procedure to make a simple network that exists in the figure below.
(1) Making of connection diagram
- Drug&drop does the router from a left node.
- A set screen opens by double-clicking the router, and the setting of the memory and the installed module is changed.
The line is selected with the button, and the line is drawn from the other router to the other router.
The line can be deleted when right-clicking on the line.
It comes off the wiring mode when the button is pushed.
(2) Start
It clicks on a button. If * in the line between routers greened, it started.- It right-clicks in the router, and the console is selected.
- The telnet client set by paragraph 4 of the setup starts.
- Config is poured according to the same procedure as the setting of a usual router as the config file is put.
(Of course, the config preservation with write memory can be done. )
The explanation of the manner of operation of GNS3 ends above.
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