Troubleshoot Multiple DHCP Offers on the Same Network Using tcpdump Network Debugging Guide
In this video, I walk you through how to identify and troubleshoot multiple DHCP offers on the same network using tcpdump. This issue is common in environments where rogue or misconfigured DHCP servers cause IP conflicts, inconsistent leases, or failed client connections.
You’ll learn how to capture and analyze DHCP traffic on your network, filter for relevant packets, and pinpoint which servers are responding to DHCPDISCOVER requests — all in real-time with practical examples.
🔹 Topics Covered:
✔ Basics of DHCPDISCOVER, DHCPOFFER, and tcpdump syntax
✔ Detecting multiple DHCP servers on a single subnet
✔ Using tcpdump filters to isolate DHCP traffic
✔ Interpreting the output to find MAC addresses and offer sources