AdvancedUnlock
L2 Security Troubleshooting Capstone: Trust Boundary
Advanced CCNP Layer-2 security troubleshooting on a single access switch. Diagnose and correct an inverted trust boundary that breaks DHCP and ARP validation: DHCP Snooping and Dynamic ARP Inspection (DAI) are enabled for VLAN 10, but the uplink is not trusted for DHCP and a host port is incorrectly trusted for ARP. Use show commands to find the issues, fix the trust boundary, and restore client connectivity without changing router/host configs.