netconnect.tar.gz

This course is a quick guide for understanding the internet protocol standard IPv4, including its packet structure, subnetting, and address configuration on hosts and routers. It also discusses the sixth version, IPv6, and its addressing scheme, subnetting, and coexistence with IPv4.

A Quick Guide for IP Subnetting

# Network configuration
Let's configure the network shown in the figure below.

1. Assign the IP address `192.168.11.2/24 `to PC1 and `192.168.12.2/24` to PC2.
2. Assign the IP address `192.168.11.1/24` to eth1 and `192.168.12.1/24` to eth2 and then to the router interfaces respectively.


Let's follow these steps one by one:
1. Click "Click to Connect" in the following widget and wait for the terminal to load and land you on the command prompt.


2. Issue the command `cd root/Documents/frrlab` to switch into the lab’s working directory.
3. Run `clab deploy --topo frrlab.yml` to create the lab infrastructure inside a container.

> **Note:** The `clab` is the container lab command to deploy the topology, which is defined in the `frrlab.yml` file.
 
4. Now, issue the command `docker exec -it clab-frrlab-router1 vtysh` to connect to the router.
> **Note:** Execute the docker container to run the `vtysh` shell to connect with router 1. The `vtysh` is a shell for Free Range Routing (FRR) daemons. It is used to build the routing table.
5. Enter the global configuration mode by typing the command `config t`.
6. Enter the interface configuration mode for `eth1` by issuing the command `interface eth1` and assign the IP address using `ip address 192.168.11.1/24`. Use the exit command to `exit` from the interface of eth1.
7. Enter the interface configuration mode for `eth2` by issuing the command `interface eth2` and assign the IP address using `ip address 192.168.12.1/24`. Use the exit command to `exit` from the interface of eth2.
8. Enter the interface configuration mode for `lo` (`lo` stands for “loopback”) by issuing the command `interface lo` and assign the IP address using `ip address 10.10.10.1/32`.  Use the exit command to `exit` from the interface of lo.
9. Use the `exit` command to exit from the global configuration mode.
10. Use the `write` command to save the configuration of the router.
11. Use the `exit` command to exit from the router CLI.
12. Connect to PC1 by typing the command `docker exec -it clab-frrlab-PC1 /bin/ash`.

> **Note:** The command `/bin/ash` opens the shell, and `docker` is used to execute a new shell on the container to configure PC1.

13. Enter these commands to assign an IP address to a PC1:
    ```
     1. ip addr add 192.168.11.2/24 dev eth1
     2. ip route add 192.168.0.0/16 via 192.168.11.1 dev eth1
     3. ip route add 10.10.10.0/24 via 192.168.11.1 dev eth1
    ```
- **Line 1:** We assign the IP address to interface eth1.
- **Line 2:** We add the new entry into the routing table using the `ip route add` command.
- **Line 3:** We add the `10.10.10.0/24` into the routing table. We can assign multiple IP addresses to the single interface.

14. Use the `exit` command to exit from the PC1 CLI.
15. Connect to PC2 by typing the command `docker exec -it clab-frrlab-PC2 /bin/ash`.

16. Enter these commands to assign an IP address to a PC2:
    ```
     1. ip addr add 192.168.12.2/24 dev eth1
     2. ip route add 192.168.0.0/16 via 192.168.12.1 dev eth1
     3. ip route add 10.10.10.0/24 via 192.168.12.1 dev eth1
    ```

17. Use the `exit` command to exit from the PC2 CLI.

18. Finally, let's see if we can ping from one PC to the other. Connect to PC1 by issuing the command `docker exec -it clab-frrlab-PC1 /bin/ash` and then issue the command `ping -c 4 192.168.12.2`. We should get ping replies for all four packets.


Learn how to configure a router with PCs.

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Hands-on Lab

Network configuration