Managing Network Interfaces on a Linux Host

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Managing Network Interfaces on a Linux Host

The `ip` and `ifconfig` commands are an invaluable part of any administrator's tool kit. In this lab, you will be tasked with configuring two separate network interfaces. This will include deleting and adding IP addresses, updating the ARP cache, changing the state of network interfaces, and recording statistics for these interfaces.

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Lab Info

Level

Intermediate

Last updated

Sep 20, 2025

Duration

30m

Challenge

Configure the ens5 Interface Using the ip Command
Note: All tasks should be performed as the root user. sudo -i
1. Remove the old ARP entry for the 192.168.1.11 address and the associated interface.
2. Delete the IP address 192.168.1.11/24 from the ens5 interface.
3. Add 10.0.2.10 as a primary IP address for ens5 and 10.0.2.20 as a secondary IP address. Both should have a broadcast address of 10.0.2.255.
4. Ensure the ens5 network interface is online.
5. Add a new entry to the ARP table for 10.0.2.10 with the associated MAC address.
Challenge

Configure the ens6 Interface Using the ifconfig Command
1. Delete the 10.0.0.10/24 IP address from the ens6 interface.
2. Add 192.168.1.20 as the primary IP address for ens6 with a netmask of 255.255.255.0 and a broadcast address of 192.168.1.255.
3. Ensure the ens6 interface is online.
4. Add an entry to the ARP table for 192.168.1.20.
Challenge

Set the ens5 Interface to Promiscuous Mode and Save Interface Statistics
1. Set the ens5 interface to promiscuous mode.
2. Save network interface statistics to /root/network_stats.

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