Tutorial 7 - EMANE

Overview

This tutorial will cover basic usage and some concepts one may want to use or leverage when working with and creating EMANE based networks.

For more detailed information on EMANE see the following:

Files

Below is a list of the files used for this tutorial.

2 node EMANE ieee80211abg scenario
- scenario.xml
- scenario.py
2 node EMANE ieee80211abg scenario, with n2 running the "Chat App Server" service
- scenario_service.xml
- scenario_service.py

Running this Tutorial

This section covers interactions that can be carried out for this scenario.

Our scenario has the following nodes and addresses:

emane1 - no address, this is a representative node for the EMANE network
n2 - 10.0.0.1
n3 - 10.0.0.2

All usages below assume a clean scenario start.

Using Ping

Using the command line utility ping can be a good way to verify connectivity between nodes in CORE.

Make sure the CORE daemon is running a terminal, if not already
```
sudo core-daemon
```
In another terminal run the GUI
```
core-gui
```
In the GUI menu bar select File->Open..., then navigate to and select scenario.xml
You can now click on the Start Session button to run the scenario
Open a terminal on n2 by double clicking it in the GUI
Run the following in n2 terminal
```
ping -c 3 10.0.0.2
```

You should see the following output

PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
64 bytes from 10.0.0.2: icmp_seq=1 ttl=64 time=7.93 ms
64 bytes from 10.0.0.2: icmp_seq=2 ttl=64 time=3.07 ms
64 bytes from 10.0.0.2: icmp_seq=3 ttl=64 time=3.05 ms

--- 10.0.0.2 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 3.049/4.685/7.932/2.295 ms

Using Tcpdump

Using tcpdump can be very beneficial for examining a network. You can verify traffic being sent/received among many other uses.

Make sure the CORE daemon is running a terminal, if not already
```
sudo core-daemon
```
In another terminal run the GUI
```
core-gui
```
In the GUI menu bar select File->Open..., then navigate to and select scenario.xml
You can now click on the Start Session button to run the scenario
Open a terminal on n2 by double clicking it in the GUI
Open a terminal on n3 by double clicking it in the GUI
Run the following in n3 terminal
```
tcpdump -lenni eth0
```
Run the following in n2 terminal
```
ping -c 1 10.0.0.2
```

You should see the following in n2 terminal

tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
14:56:25.414283 02:02:00:00:00:01 > 02:02:00:00:00:02, ethertype IPv4 (0x0800), length 98: 10.0.0.1 > 10.0.0.2: ICMP echo request, id 64832, seq 1, length 64
14:56:25.414303 02:02:00:00:00:02 > 02:02:00:00:00:01, ethertype IPv4 (0x0800), length 98: 10.0.0.2 > 10.0.0.1: ICMP echo reply, id 64832, seq 1, length 64

Running Software

We will now leverage the installed Chat App software to stand up a server and client within the nodes of our scenario.

Make sure the CORE daemon is running a terminal, if not already
```
sudo core-daemon
```
In another terminal run the GUI
```
core-gui
```
In the GUI menu bar select File->Open..., then navigate to and select scenario.xml
You can now click on the Start Session button to run the scenario
Open a terminal on n2 by double clicking it in the GUI

Run the following in n2 terminal

export PATH=$PATH:/usr/local/bin
chatapp-server

Open a terminal on n3 by double clicking it in the GUI

Run the following in n3 terminal

export PATH=$PATH:/usr/local/bin
chatapp-client -a 10.0.0.1

You will see the following output in n1 terminal

chat server listening on: :9001
[server] 10.0.0.1:44362 joining

Type the following in n2 terminal and hit enter
```
hello world
```

You will see the following output in n1 terminal

chat server listening on: :9001
[server] 10.0.0.2:44362 joining
[10.0.0.2:44362] hello world

Tailing a Log

In this case we are using the service based scenario. This will automatically start and run the Chat App Server on n2 and log to a file. This case will demonstrate using tail -f to observe the output of running software.

Make sure the CORE daemon is running a terminal, if not already
```
sudo core-daemon
```
In another terminal run the GUI
```
core-gui
```
In the GUI menu bar select File->Open..., then navigate to and select scenario_service.xml
You can now click on the Start Session button to run the scenario
Open a terminal on n2 by double clicking it in the GUI
Run the following in n2 terminal
```
tail -f chatapp.log
```
Open a terminal on n3 by double clicking it in the GUI

Run the following in n3 terminal

export PATH=$PATH:/usr/local/bin
chatapp-client -a 10.0.0.1

You will see the following output in n2 terminal

chat server listening on: :9001
[server] 10.0.0.2:44362 joining

Type the following in n3 terminal and hit enter
```
hello world
```

You will see the following output in n2 terminal

chat server listening on: :9001
[server] 10.0.0.2:44362 joining
[10.0.0.2:44362] hello world

Advanced Topics

This section will cover some high level topics and examples for running and using EMANE in CORE. You can find more detailed tutorials and examples at the EMANE Tutorial.

Note

Every topic below assumes CORE, EMANE, and OSPF MDR have been installed.

Scenario files to support the EMANE topics below will be found in the GUI default directory for opening XML files.

Topic	Model	Description
XML Files	RF Pipe	Overview of generated XML files used to drive EMANE
GPSD	RF Pipe	Overview of running and integrating gpsd with EMANE
Precomputed	RF Pipe	Overview of using the precomputed propagation model
EEL	RF Pipe	Overview of using the Emulation Event Log (EEL) Generator
Antenna Profiles	RF Pipe	Overview of using antenna profiles in EMANE

gRPC Python Scripts

You can also run the same steps above, using the provided gRPC script versions of scenarios. Below are the steps to run and join one of these scenario, then you can continue with the remaining steps of a given section.

Make sure the CORE daemon is running a terminal, if not already
```
sudo core-daemon
```
From another terminal run the tutorial python script, which will create a session to join
```
/opt/core/venv/bin/python scenario.py
```
In another terminal run the CORE GUI
```
core-gui
```
You will be presented with sessions to join, select the one created by the script