How to Configure DHCP Snooping on Cisco Router

In this CCNA lab, the instructor demonstrates how to configure DHCP snooping. The process begins with setting up a DHCP server and DHCP relay. The instructor outlines the necessary configurations for the router interfaces, including assigning IP addresses and creating DHCP pools while excluding certain IP addresses to avoid conflicts. After configuring the DHCP settings, the instructor tests the setup to ensure that a PC can successfully obtain an IP address from the DHCP server. The DHCP relay is also configured to allow devices on different subnets to receive IP addresses from the main router. The instructor then discusses potential security risks, such as an attacker setting up a rogue DHCP server within the LAN to intercept traffic. To mitigate this risk, DHCP snooping is enabled on the switch, which ensures that only authorized DHCP servers can assign IP addresses to clients. The final steps involve configuring the switch to recognize legitimate DHCP servers and prevent clients from connecting to unauthorized servers. The lab concludes with a demonstration of the completed configuration.

**Timestamps**
00:02 - Intro to CCNA 20301 Lab
00:10 - Setting up DHCP Server
01:39 - Configuring DHCP Relay
02:50 - Excluding IP Address Range
03:31 - Testing DHCP Lease on PC
05:31 - Configuring DHCP Pool
06:05 - Implementing Static Routing
07:19 - DHCP Relay Configuration Success
08:00 - Understanding DHCP Snooping Security
09:10 - Finalizing DHCP Configuration Steps
11:34 - Conclusion and Wrap-up