We are re-publishing it here with permission as it provides an excellent introduction to getting started with the P4 language using the software tools that have been developed by the open-source community. I recently got serious about learning P4, a programming language for the data plan in networking devices such as routers, switches, and Network Interface Cards NICs. It took me a while to figure out the exact sequence of steps for writing a minimal P4 program, compiling it, actually getting it to run on a simulated software switch, injecting some packets, and observing how the P4 program forwards the injected packets.
Create an AWS t2. In the make -j4 check step, multiple test cases fail, for example. The test failures are all related to eBPF, which we will not be using. We will now install a P4 software switch to run our P4 program.
The P4 architecture file for this switch is v1model. The steps up until now are pretty time consuming, so it is worthwhile taking a snapshot of your AWS instance for future P4 projects. Our minimal P4 program will only process IPv4 over Ethernet packets and it will contain only a single table that does a longest-prefix-match lookup on the destination IP address to decide the outgoing port.
The focus is not on producing a useful or interesting P4 program. Instead the focus is on documenting the steps required to get started with P4 programming.
Use an editor e. This is an extremely simple program. It has a single lookup table, which does a longest-prefix-match LPF on the destination IP address in the received packet. The action is either drop the packet, or forward the packet to a specific output port. Compile the P4 program. In the commands below, the -b option selects bmv2 Behavioral Model Version 2 as the target, which is the software switch that we will use to run the P4 program. This compiler generates a directory test.
We will now create three pairs of virtual Ethernet veth interfaces. A veth interface is a virtual i. However, in the case of a veth interface the packets do not go out a real Ethernet port. Instead, veth interfaces are always created in pairs. Step 5. Step 6. Now, the PS4 will prepare the installation of the system software update. Wait patiently for this installation to complete. Once the update is completed, the PS4 will restart automatically.
Way 2. After the installation completes, the PS4 system will restart automatically. I believe that you already have known all the detailed steps.
Have a try now. If the PS4 system software update fails, you may need to reinstall the PS4 system software. How to reinstall PS4 system software without data loss? Since reinstalling the PS4 system is the same as a factory reset and will restore your system to its original state, so please make sure that you have backed up all important data in advance.
You can back up them to the online storage or an external storage device. The latest PS4 system software update has been released. I want to improve my PS4 system performance through the update. This post provides detailed steps. Perhaps you are looking for this. Click to tweet. If you have any better ideas about this topic, you can share them with us in the following comment area. Any questions about MiniTool Partition Wizard, you can send us an e-mail via [email protected].
Download Partition Wizard. If this does not extract the files on your Linux system, use this command to unpack the archive:. This will create a new directory with the name of the application and a version number in the name, such as:.
Double-click on p4v to start the application. You can add a shortcut to the application on your desktop. For example:. The exact procedure to edit the PATH can vary depending on your system. Then open a new terminal window and type:. Whether you're looking for self-service resources, product downloads, or how to contact Technical Support, we've got lots of options to get the help you need—fast!
Try Free Request Support. Sign in to ask the community.
0コメント