Skip to Copy-and-paste shell commands below if you want to quickly configure the node Router This section shows the commands to configure Router-1 step by step.
Install the quagga package and then configure the Quagga VTY shell. This will create the basic setup for a router.
Set up environment variables so we avoid the vtysh END problem. If you wish to copy-and-paste commands to quickly configure Router-1, then skip the previous section and enter the following commands. We use the here documents feature of the Bash shell to redirect the pasted block of input to the bash shell command line:. I will configure the remaining routers with the quick shell commands so you can copy and paste the configuration for each router.
Copy-and-paste the following commands into the Router-2 terminal window:. Copy-and-paste the following commands into the Router-3 terminal window:. Skip to copy-and-paste shell commands below if you want to quickly configure the node PC This sections shows the commands step by step, for clarity.
Then, add a static route the sends all traffic in the If you wish to copy-and-paste commands to quickly configure PC-1, then enter the following commands:. The remaining PC nodes are configured in the same way, with different IP addresses. I list shell commands that may be copied and pasted to quickly configure the nodes:. On PC-2, add the interface configuration to the network interfaces file and set up a static route:. On PC-3, add the interface configuration to the network interfaces file and set up a static route:.
We listed commands that you can copy and paste to set up a simple network consisting of Ubuntu Linux computers. We can use this network to test open-source network emulators and open source networking software.
I would like to know how different open-sources handle the multi-real-machine overlay virtual networks. Hi Vincent, The main purpose of this post is to create a configuration procedure to which I can link from other posts. I have many posts where I set up a network emulator and then must configure the nodes being emulated.
I would prefer to point to this configuration post instead of repeating the same information in multiple posts.
I expect that the actual operation configured — a single-area OSPF network — will work the same regardless of the infrastructure. It should operate the same on an emulator or on physical hardware. Performance may differ depending on the infrastructure used but I have not made any objective measurements of performance in my evaluation of network emulators. The main differences will be in the infrastructure setup, which is not covered in this post. For example, how easy is it to set up the management network?
Cloonix is makes setting up a management network almost automatic, for example. Thanks, Brian. Thanks for sharing this- good stuff! Keep up the great work, we look forward to reading more from you in the future! Hi Brian. Thank you so much for your tutorials they have been very helpful! When I run the vtysh command. Hi Tom, Did you follow the tutorial above exactly, or did you set up quagga on your own?
If you set up quagga on your own, a common cause of this error is that the quagga config files are not owned by the quagga group. Also, did you start the quagga service before you ran vtysh? Brian thank you for the fast response! Actually I started up my VM today to continue and it worked. Just like you can access router and give commands, you can do the same with this application. Its architecture is very interesting since it is installed on Linux and it acts as an abstraction layer on the Kernel of Linux server and rest of the architecture consists of sockets on which all the communication occurs.
You can access all the protocols through CLI just like you are accessing some third layer router and you will not feel any difference in applying commands. For CentOS operating system: yum install quagga. The Quagga suite contains several different pieces of software that work together to accomplish successful routing.
For BGP routing, we are focusing primarily on two daemons, namely Zebra- A core daemon that focuses on kernel interfaces and static routing. Once installed, we need to configure everything. For instance, we have installed version "quagga Quagga offers a dedicated CLI shell called vtysh. This CLI helps the user to interact with the software with user-friendly commands. To launch vtysh, we use the following command.
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