3. Validate Network

3.1. Host

Open a shell (right click on desktop and select ‘Open Terminal here’ or press CRTL + ALT + T) on the Host and enter the following commands.

Attention

Each destination must be ping-able!

Ping Host (self)

ping 192.168.157.1

Ping RT-Linux
```
ping 192.168.157.2
```
Ping Linux I (UBUNTU)
```
ping 192.168.157.10
```
Ping Linux II (UBUNTU)
```
ping 192.168.157.11
```

3.2. RT-Linux

Switch to console of RT-Linux and enter the following commands.

Attention

Each destination must be ping-able!

Ping Host
```
ping 192.168.157.1
```
Ping RT-Linux (self)
```
ping 192.168.157.2 -c 5
```
Ping Linux I (UBUNTU)
```
ping 192.168.157.10
```
Ping Linux II (UBUNTU)
```
ping 192.168.157.11
```

3.3. Linux I (UBUNTU)

Switch into Linux I (UBUNTU) guest and open a shell (right click on desktop and select ‘Open Terminal here’ or press CRTL + ALT + T) and enter the following commands.

Attention

Each destination must be ping-able!

Ping Host
```
ping 192.168.157.1
```
Ping RT-Linux
```
ping 192.168.157.2
```
Ping Linux I (UBUNTU) (self)
```
ping 192.168.157.10
```
Ping Linux II (UBUNTU)
```
ping 192.168.157.11
```

3.4. Linux II (UBUNTU)

Switch into Linux II (UBUNTU) guest and open a shell (right click on desktop and select ‘Open Terminal here’ or press CRTL + ALT + T) and enter the following commands.

Attention

Each destination must be ping-able!

Ping Host
```
ping 192.168.157.1
```
Ping RT-Linux
```
ping 192.168.157.2
```
Ping Linux I (UBUNTU)
```
ping 192.168.157.10
```
Ping Linux II (UBUNTU) (self)
```
ping 192.168.157.11
```