Protecting Your Network with Cisco DHCP Snooping DHCP Snooping is a Layer 2 security feature available on Cisco switches that prevents unauthorized DHCP servers from distributing IP addresses to clients. Without DHCP Snooping, a rogue device could impersonate a DHCP server and redirect client traffic through malicious gateways. Step 1: Enable DHCP Snooping Globally Switch(config)# ip dhcp snooping This enables the DHCP Snooping feature globally on the switch. Step 2: Specify VLANs to Protect Switch(config)# ip dhcp snooping vlan 10 This tells the switch to monitor DHCP traffic on VLAN 10. Step 3: Configure Trusted Ports Ports connected to legitimate DHCP servers must be marked as trusted. Switch(config)# interface GigabitEthernet0/1 Switch(config-if)# ip dhcp snooping trust All other ports remain untrusted and cannot send DHCP server responses. Verification show ip dhcp snooping show ip dhcp snooping binding Final Thoughts DHCP Snooping is a fundamental security feature that should be enabled on all enterprise access layer switches.