Sigcomm 17 (#52)

This problem contains the tutorial exercises and solutions presented at SIGCOMM '17.

SIGCOMM_2017/exercises/README.md

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+# P4 Tutorial
+
+## Introduction
+
+Welcome to the P4 Tutorial!
+
+We've prepared a set of exercises to help you get started with P4
+programming, organized into four modules:
+
+1. Introduction
+* [Basic Forwarding](./basic)
+* [Scrambler](./scrambler)
+
+2. Monitoring and Debugging
+* [Explicit Congestion Notification](./ecn)
+* [Multi-Hop Route Inspection](./mri)
+
+3. Advanced Data Structures
+* [Source Routing](./source_routing)
+* [Calculator](./calc)
+
+4. Dynamic Behavior
+* [Load Balancing](./load_balance)
+* [HULA](./hula)
+
+## Obtaining required software
+
+If you are starting this tutorial at SIGCOMM 2017, then we've already
+provided you with a virtual machine that has all of the required
+software installed.
+
+Otherwise, to complete the exercises, you will need to either build a
+virtual machine or install several dependencies.
+
+To build the virtual machine:
+- Install [Vagrant](https://vagrantup.com) and [VirtualBox](https://virtualbox.org)
+- `cd vm`
+- `vagrant up`
+- Log in with username `p4` and password `p4` and issue the command `sudo shutdown -r now`
+- When the machine reboots, you should have a graphical desktop machine with the required software pre-installed.
+
+To install dependences by hand:
+- `git clone https://github.com/p4lang/behavioral-model.git`
+- `git clone https://github.com/p4lang/p4c`
+- `git clone https://github.com/p4lang/tutorials`
+Then follow the instructions for how to build each package. Each of
+these repositories come with dependencies, which can be installed
+using the supplied instructions. The first repository
+([behavioral-model](https://github.com/p4lang/behavioral-model))
+contains the P4 behavioral model. It is a C++ software switch that
+will implement the functionality specified in your P4 program. The
+second repository ([p4c](https://github.com/p4lang/p4c-bm)) is the
+compiler for the behavioral model. It takes P4 program and produces a
+JSON file which can be loaded by the behavioral model. The third
+repository ([tutorial](https://github.com/p4lang/tutorial)) is the P4
+Tutorial itself. You will also need to install `mininet`. On Ubuntu,
+it would look like this:
+
+```
+$ sudo apt-get install mininet
+```