Installation

Requirements

• JunOS runs on top of FreeBSD. So you need to download the mini installation ISO, version >= 4.5 because earlier versions don’t support the Intel e1000 interface (em driver). Personally, I used the FreeBSD 4.11 mini-inst ISO but you could use FreeBSD 6 or 7.
• JunOS itself. If you are smart and patient you will find it. I used jinstall-8.5R1.14-domestic-signed.tgz for my installations.
• Qemu source code. Again, I used Qemu 0.11.0. You can choose to download it later with wget (I’ll show you how).
• Download OpenVPN to create TAP interfaces (Windows only, optional).
• More stuff whether you compile Qemu on Mac OS X, Windows or Linux.

Qemu compilation and patching on Mac OS X

The following procedure has been tested on Mac OS X Snow Leopard.

First you have to install the MacPorts and its dependencies (e.g. latest Apple’s Xcode Developer Tools).

Open a terminal window and install zlib, wget and libpcap via the MacPorts:

sudo port install zlib wget libpcap

Unzip qemu somewhere (e.g. in Documents/JunOS). Then from the qemu directory, patch and compile qemu:

Because FreeBSD hanged a few times when I was installing it inside Qemu, I applied a patch (qemu-0.11.0-macosx) which apparently fixed the problem (this is totally optional, maybe you won’t have any issue if not applied).

wget http://download.savannah.gnu.org/releases/qemu/qemu-0.11.0.tar.gz
tar xvzf qemu-0.11.0.tar.gz
cd qemu-0.11.0
wget http://downloads.sourceforge.net/gns-3/qemu-0.11.0-macosx.patch?download
patch -p1 -i qemu-0.11.0-macosx.patch
wget http://downloads.sourceforge.net/gns-3/qemu-0.11.0-olive.patch?download
patch -p1 -i qemu-0.11.0-olive.patch
./configure --disable-aio --disable-kvm --disable-kqemu --disable-sdl \
--target-list=i386-softmmu
make
sudo make install

Qemu compilation and patching on Windows

If you do not want to compile Qemu on Windows (I can understand that I provide a static version that you can download here.

First some dependencies must be installed, I chose to almost compile everything:

• Download MinGW and install it (choose custom installation with g++ and make included). The file I downloaded was MinGW-5.1.6.exe

• Download MSYS and install it, answer yes to post-installation questions and put the correct path to MinGW directory (should be C:\MinGW). The file I downloaded was MSYS-1.0.11.exe.

• Download , zlib, SDL, MSYS coreutils into your MSYS home directory (e.g. c:\Msys\public\username). I downloaded zlib-1.2.3.tar.gz, SDL-1.2.14.tar.gz and coreutils-5.97-MSYS-1.0.11-snapshot.tar.bz2. MSYS coreutils is necessary because Qemu signrom.sh uses tools such as dd, od, expr, cp and printf which are included in coreutils.

• Download and install  Winpcap Developer Pack: extract the contents of \lib and \include folders into \lib and \include folders of your MinGW installation location (should be C:\MinGW\lib and C:\MinGW\include)

• Start MSYS.

• Compile and install zlib:

cd
tar -xzvf zlib-1.2.3.tar.gz
cd zlib-1.2.3
./configure --prefix=/mingw
make
make install

• Compile and install SDL

tar -xzvf SDL-1.2.14.tar.gz
cd SDL-1.2.14
./configure --prefix=/mingw
make
make install

• Install coreutils

tar -xvjf coreutils-5.97-MSYS-1.0.11-snapshot.tar.bz2

Copy the content of coreutils-5.97-MSYS-1.0.11-snapshot in the MinGW directory (e.g. C:\MinGW). You can also compile and install wget in MSYS or simply use your preferred browser to download Qemu and the patch in the correct directories.

wget http://download.savannah.gnu.org/releases/qemu/qemu-0.11.0.tar.gz
tar -xvzf qemu-0.11.0.tar.gz
cd qemu-0.11.0
wget http://downloads.sourceforge.net/gns-3/qemu-0.11.0-olive.patch?download
patch -p1 -i qemu-0.11.0-olive.patch
./configure --target-list=i386-softmmu
make
make install

Qemu compilation and patching on Linux

Compiling Qemu on Linux (Ubuntu) is quite simple.

First install the dependencies: ncurses, zlib, libpcap-dev and SDL libraries. SDL is optional, you can still use Qemu in a console with the –ncurses option. Then apply the patch and compile Qemu.

sudo apt-get install libncurses5-dev zlib1g-dev libsdl-dev libpcap-dev
wget http://download.savannah.gnu.org/releases/qemu/qemu-0.11.0.tar.gz
tar xvzf qemu-0.11.0.tar.gz
cd qemu-0.11.0
wget http://downloads.sourceforge.net/gns-3/qemu-0.11.0-olive.patch?download
patch -p1 -i qemu-0.11.0-olive.patch
./configure --target-list=i386-softmmu
make
sudo make install

Qemu acceleration

Qemu provides some ways to speed up the emulation, I’ll talk about 2 of them: Kqemu and KVM. Kqemu can be used on both  Windows and Linux. KVM is only for Linux. I do not know if something exists for Mac OS X.

For more details about Kqemu, please have a look at the documentation. For KVM, see the website.

The installation of Kqemu on Windows is relatively easy:

1. Download Kqemu.
2. Unzip it.
3. Locate kqemu.inf and install it (right-click and select Install). In Windows Vista, install Kqemu using the CMD prompt and this command: rundll32.exe setupapi,InstallHinfSection DefaultInstall 132 kqemu.inf
4. Start Kqemu from the CMD prompt: net start kqemu

Kqemu on Linux (Ubuntu):

1. Install kqemu with: sudo apt-get install kqemu-source
2. If you do not want to use sudo each time you start Qemu, give the permissions to /dev/qemu with the following command: sudo chmod o+rw /dev/kqemu

For manual installation or other Linux distributions, please see the documentation.

KVM on Linux:

Qemu requires your kernel version to be >= 2.6.29 to enable the KVM support. You have to ensure this is ok before you compile Qemu.

Don’t forget to add the -kernel-kqemu or -enable-kvm command line options when starting Qemu (I didn’t do it in this tutorial). I would recommend to activate Kqemu only when you have your Olive image ready and working.

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