Topic

DTP practice labs

2 hands-on DTP scenarios you build in your own Cisco Modeling Labs instance and grade against the answer key. Focused DTP configuration and troubleshooting practice for CCNA and CCNP.

AdvancedUnlock

802.1Q Trunking Troubleshooting Capstone

Advanced CCNA switching capstone centered on restoring end-to-end VLAN 20 transport across three Layer-2 switches using 802.1Q trunks. The starter ships intentionally broken: after a simulated maintenance window, two Alpine hosts in VLAN 20 can no longer reach each other across the inter-switch trunks. Learners diagnose with show interfaces trunk, show interfaces switchport, and show vlan brief, then identify and correct the trunking faults in the right order and verify with host pings.

Track

CCNA

Duration

55 min

View details Unlock with VLAN Trunking (802.1Q)

IntermediateUnlock

VLAN Trunking 6: DTP and Trunk Hardening

Hands-on DTP negotiation and trunk hardening across a 3-switch path. You will observe dynamic trunking behavior (auto vs desirable), fix an allow-list drift that blocks user VLAN transport, and then harden the trunks to static with nonegotiate and a non-default native VLAN. End-to-end host reachability in the same VLAN proves success.