How to solve the GNS3 error ”failed to start xdotool” in Ubuntu?

If we get the error "failed to start xdotool" while starting vboxwrapper in GNS3, use the following command to fix it.

sudo apt-get install xdotool

 This will install xdotool and solve the issue.

How to create a frame relay switch

Here I am going to demonstrate how to configure cisco router as a frame relay switch. The configuration is very simple. So check the figure below carefully and understand the configuration.

Connect the routers as in the figure.Here I am creating two PVCs – first one between R1 & R2, and second one between  R1 & R3

Installing GNS3 on CentOS 6.x/RHEL 6.x/Fedora 15

1. Login as root then do the following steps:
   yum install python python-devel xorg-x11-proto-devel libXext-devel gcc-c++ libXrender*


2. Download and install Qt
   #wget http://get.qt.nokia.com/qt/source/qt-everywhere-opensource-src-4.7.4.tar.gz
   #tar -xzf qt-everywhere-opensource-src-4.7.4.tar.gz
   #cd qt-everywhere-opensource-src-4.7.4
   #./configure -nomake examples -nomake demos -qt-gif -no-exceptions -debug -qt3support
   #gmake
   #gmake install
   #PATH=/usr/local/Trolltech/Qt-4.7.4/bin:$PATH
   #export PATH


3. Download and install sip
   #wget http://www.riverbankcomputing.co.uk/static/Downloads/sip4/sip-4.13.tar.gz
   #tar -xvf sip-4.13.tar.gz
   #cd sip-4.13.tar
   #python configure.py
   #make
   #make install


4. Download and install PyQt
   #wget http://ftp.pardus.org.tr/pub/source/2009/PyQt-x11-gpl-4.8.4.tar.gz
   #tar xvf PyQt-x11-gpl-4.8.4.tar.gz
   #cd PyQt-x11-gpl-4.8.4
   #python configure.py -q /usr/local/Trolltech/Qt-4.7.4/bin/qmake
   #make
   #make install


5. Download GNS3
   #wget http://downloads.sourceforge.net/project/gns-3/GNS3/0.7.4/GNS3-0.7.4-src.tar.gz
   #tar -xvf GNS3*.tar.gz && rm GNS3*.tar.gz
   #cd GNS3-0.7.4-src
   #mkdir Dynamips IOS Project Cache Temp


6. Download Dynamips depending up on OS (64-bit/32-bit)
   #cd dynamips
   #wget http://downloads.sourceforge.net/gns-3/dynamips-0.2.8-RC2-amd64.bin?download (for 64-bit OS)
   #wget http://downloads.sourceforge.net/gns-3/dynamips-0.2.8-RC3-community-x86.bin?download (for 32-bit OS)
   #chmod +x dynamips-0.2.8-RC2-amd64.bin (if we use 32-bit version, use the name of that file)


7. Creating Quick launch with gns3 icon
   #wget http://www.noahbeach.com/wp-content/uploads/2011/08/gns3.png
   Now right click on the panel and select add to panel > custom launcher > select the gns3 location and press on the icon button to locate the icon just downloaded. ok
   Now if we press that icon in the panel, gns3 will run...!!!

Installing and configuring SecureCRT for gns3

Secure CRT Installation

1. Download secureCRT with crack from internet (There are plenty of places, use google to search “SecureCRT with crack downlaod”)
2. Install secureCRT
3. copy the crack to installation directory (eg: C:\Program Files\VanDyke Software\SecureCRT\)
4. Run the crack as administrator (Right click the crack and in the menu select run as administrator)
5. Enter anything in name and company field and press generate. Now, the serials and other information appears.
6. Press the patch button to patch the secureCRT.exe file. That’s it.  Now the secure CRT installed correctly.

GNS3 configuration of secure CRT

1. Download and install GNS3, add IOS etc.
2. Go to Edit > Preferences > General > Terminal settings tab > SecureCRT > Change preconfigured terminal commands to SecureCRT (64 bit or 32 bit depending upon the version installed) > Press “use” button > press ok
3. Now add some routers (with IOS added) to work space and turn it on.
4. Press the console button to see the tabbed windows for each router

Note: if any error occurs, check the installation path of SecureCRT in the terminal command