What you'll learn

Addressing problems can be deceptively simple: one wrong mask, gateway, prefix, or assignment can make an otherwise healthy network look broken. In this course, Cisco CCNA 200-301: IPv4 and IPv6 Addressing and Troubleshooting, you’ll gain the ability to troubleshoot IPv4 and IPv6 address configuration, assignment, subnetting, and prefix sizing using a clear, evidence-based approach. First, you’ll explore IPv4 subnetting with VLSM, public and private address space, and NAT boundary implications so you can understand what correct addressing should look like. Next, you’ll discover how to use host and device evidence to diagnose static IPv4 misconfiguration and DHCP-assigned addressing problems such as APIPA, wrong-scope leases, and scope exhaustion. Finally, you’ll learn how to interpret IPv6 address types and prefixes, trace modified EUI-64 address generation, troubleshoot SLAAC and DHCPv6 assignment, and verify Neighbor Discovery operation. When you’re finished with this course, you’ll have the skills and knowledge of IPv4 and IPv6 addressing and troubleshooting needed to follow the evidence, isolate common addressing faults, and verify that the network is using the addressing information you expect.