Linux Mint 12 : How to install dynamips and gns3 ( Cisco Router Emulator )

Here’s an explanation of how to install dynamips and gns3 on Linux Mint 12.

# uname -ri 3.0.0-15-generic x86_64 # tail -1 /etc/lsb-release DISTRIB_DESCRIPTION="Linux Mint 12 Lisa"

[ install dynamips and gns3 ]

dynamips is Cisco Router emulator and gns3 is GUI tool for dynamips.

# apt-get install -y dynamips gns3

[ initial setup ]

start gns3

$ gns3 &

do step1 ( configure working directory ) and then step2 ( load IOS )

step1 ( click OK. default settings )

step2

select the IOS image you want to run.

I used c3640-jk9s-mz.124-13a.bin.

click “Save”

drag and drop “Router c3600” icon like this.

start c3600

configure Idle PC

By default , the dynamips process uses around 100% CPU consumption.

# top -b -n 1 | grep dynamips 25472 hattori   20   0  363m 185m  65m S   99  1.5   3:17.27 dynamips

To reduce CPU consumption

select Router icon , right-click , Idle PC

Dynampis will calculate an appropriate Idle PC values.

Click “Apply”

After configuring Idle PC values.

# top -b -n 1 | grep dynamips 25472 hattori   20   0  363m 185m  65m S    8  1.5   6:57.80 dynamips

CPU consumption is 8%.

Configuration file is stored under .gns/ directory. ( gns3.ini file )

# head -5 /home/hattori/.gns3/gns3.ini [GNS3] version=1795 lang=en project_startup=true relative_paths=true