Mang Iyus – Nge"BLOG"

Instalasi VNUML ku dengan DVD yang bisa diunduh disini (lokal link), jika sudah installnya bisa dibuat remote desktop nya bisa dilihat di sini, so .. untuk coba2 simulasi banyak network usahakan aja yaaa memorynya cukup gede ini di PC “oprekan” yang pake Celeron 2Ghz sama memory 1gb lumayan megap… megap … :d

Download and install dynamips (CISCO emulator) from http://www.ipflow.utc.fr/blog/. For example, for x86 platfoms:

 wget http://www.ipflow.utc.fr/dynamips/dynamips-0.2.7-RC3-x86.bin
 chmod +x dynamips-0.2.7-RC3-x86.bin
 mv dynamips-0.2.7-RC3-x86.bin /usr/local/bin
 ln -s /usr/local/bin/dynamips-0.2.7-RC3-x86.bin /usr/local/bin/dynamips

Download and install dynagen (the network configuration generator for Dynamips) from http://dynagen.org/. For example:

 wget http://jaist.dl.sourceforge.net/sourceforge/dyna-gen/dynagen-0.9.2.tar.gz
 tar xfvz dynagen-0.9.2.tar.gz
 mv dynagen-0.9.2 /usr/local/
 ln -s /usr/local/dynagen-0.9.2/dynagen /usr/local/bin/

Get a cisco iso image for a router supported by dynamips and copy it to a directory, for example, to vnuml filesystems directory:

 cd /usr/share/vnuml/filesystems
 wget ..../c3640-ik9o3s-mz.124-13a.bin

Unzip the image to accelerate start up:

 unzip -p c3640-ik9o3s-mz.124-13a.bin > c3640-ik9o3s-mz.124-13a.image

And create a simple link for the cisco image:

 ln -s c3640-ik9o3s-mz.124-13a.image c3640

[edit] Testing Dynamips/dynagen installation

Start dynamips daemon:

dynamips -H 7200&

Create a simple escenario, for example, copy the following on to a file named test.net:

[localhost]

    [[3640]]
        image = /usr/share/vnuml/filesystems/c3640
        ram = 96

    [[ROUTER R1]]
        model = 3640

Start the scenario with:

 dynagen simple1.net

Open the router console and wait till the router has started completely:

 console R1

Once started, you have to calculate the best Idle-PC values for your computer, to avoid dynamips consuming all the CPU (if you have a look at your CPU, you will probably see it is 100% occupied).

To estimate the optimum idle pc value for your case, execute:

 idlepc get R1

and choose one of the values marked with an “*”. If you see that the CPU usage is not reduced considerably, then execute:

 idlepc show R1

and chose the next value marked with “*”.

Repeat the procedure till you find a good value. Then save it with:

 idlepc save R1

The value is copied to the “test.net” file (a line similar to “idlepc = 0x605d32a4″). Remember to add that line to all your routers in your scenarios.