CCNA Trunking 2: Access Ports vs Trunk Ports

Bundle lab · $29.99

Hands-on CCNA switching lab contrasting single-VLAN access ports with 802.1Q trunks. You begin with the inter-switch link configured as a plain access port, so only one VLAN reaches the router-on-a-stick gateway while the other cannot. You will diagnose the connectivity problem, convert the link into a properly hardened 802.1Q trunk, and validate that both VLANs regain access to their gateway.

Learning objectives

• Differentiate access and trunk ports and when to use each
• Configure access ports for end hosts and verify VLAN membership
• Convert a switch-to-switch link from access to an 802.1Q trunk
• Harden trunks: set native VLAN 999, prune VLAN 1, set allowed VLAN lists, and disable negotiation
• Use show interfaces switchport and show interfaces trunk to verify administrative vs operational mode

Troubleshooting focus

• Identify symptoms when an inter-switch link is accidentally configured as an access port
• Detect and correct native VLAN mismatches
• Find and fix missing VLANs on the trunk allowed list
• Validate end-host placement and isolate wrong access VLAN assignments