CCNA practice labs — Page 7

ACL Troubleshooting Capstone: Classic Faults, NAT, Placement

Advanced ACL and NAT capstone, run as a fault hunt. A branch site was cut over last night and the policy does not behave: the flow that should be blocked gets through, other traffic does not come back at all, and nobody recorded what changed. You get symptoms and the required end state — no fault list. The faults span all three routers and include a shadowed ACE and a policy applied on the wrong side of NAT, so translated addresses hide the very hosts the rules name. Expect fixing the first one to change the symptom rather than clear it.

CCNA75 min5 objectives

Inter-VLAN Routing: Router-on-a-Stick Across a Branch

Deploy router-on-a-stick inter-VLAN routing across a compact branch topology with a distribution and access switch, a hardened 802.1Q trunk, and two user VLANs. Configure VLANs and access/trunk ports, build router subinterfaces, verify end-to-end user reachability, and troubleshoot trunk/native-VLAN/subinterface mismatches.

CCNA55 min5 objectives

Extended ACL Fundamentals: Permit HTTP, Deny Others

Deploy a numbered extended ACL on a router-on-a-stick topology to allow HTTP from a single approved client to a web server while denying all other TCP attempts to that server from the same user VLAN. Apply the ACL inbound near the source, verify with real client traffic, and troubleshoot using ACL hit counts and test flows.

CCNA50 min5 objectives

Scaling to Three VLANs: Adding a Department

Extend a working two-VLAN router-on-a-stick design to a third VLAN (Guest) without breaking Sales and Engineering. Add one router subinterface, one switch VLAN + access port, and update the switch trunk’s allowed-VLAN list safely using 'add' so existing VLANs remain transported.

CCNA55 min5 objectives

Router-on-a-Stick Troubleshooting Capstone

Advanced CCNA capstone: diagnose and repair a fully-broken three-VLAN router-on-a-stick deployment. One iol-xe router uplinks by 802.1Q trunk to a pure layer-2 ioll2-xe switch, with three alpine PCs on their own access VLANs (10 Sales, 20 Voice, 30 CCTV); after a recent switch and router change, inter-VLAN connectivity is broken or intermittent across all three VLANs. Trace VLAN intent end-to-end from each host through the trunk to the router's subinterfaces, repair whatever faults you find, and verify with end-host pings/traceroutes and IOS show commands.

CCNA68 min5 objectives

Router-on-a-Stick Fundamentals: Two VLANs, One Trunk

Configure inter-VLAN routing using router-on-a-stick with one router, one Layer-2 switch, and two hosts. Build VLAN 10 and VLAN 20, trunk the router uplink, create subinterfaces for each VLAN, and verify that hosts can now reach each other across VLANs.

CCNA45 min5 objectives

Free with an account

dot1Q Subinterfaces: The Router Side

Practice creating 802.1Q subinterfaces on a single router uplink to deliver inter-VLAN routing using router-on-a-stick. The Layer-2 switch is already fully configured with VLAN 10 and VLAN 20, access ports for two hosts, and a working 802.1Q trunk to the router. Your job: leave the router's physical Ethernet0/0 unnumbered and add exactly two subinterfaces with the correct encapsulation tags and gateway IPs so hosts can reach their gateways and each other.

CCNA35 min4 objectives

Diagnosing a Broken Router-on-a-Stick

Advanced CCNA troubleshooting lab on a router-on-a-stick design. VLAN 10 users can reach their gateway and other hosts, but VLAN 20 users cannot reach their gateway or any resources in VLAN 10. Methodically trace L2/L3 intent end-to-end - from the access ports through the trunks up to the router subinterfaces - to isolate the first-hop failure and implement fixes that restore inter-VLAN routing while maintaining enterprise trunk hardening and clean configurations.

CCNA60 min5 objectives

Switch Trunk and Access Ports for Router-on-a-Stick

Configure the Layer-2 switch side of a router-on-a-stick design. A single IOS router already provides inter-VLAN routing on Ethernet0/0.10 (10.0.10.1/24) and Ethernet0/0.20 (10.0.20.1/24). Bring up VLAN transport by creating VLANs on the switch, assigning host access ports, and converting the router-facing link into an 802.1Q trunk that carries VLANs 10 and 20. Validate with show commands on the switch and with cross-VLAN pings from the hosts.

CCNA30 min4 objectives

Multi-Dept Campus Inter-VLAN with Router-on-a-Stick

Design and implement a three-department campus edge using a single router-on-a-stick to provide inter-VLAN routing for Sales (VLAN 10), Engineering (VLAN 20), and Servers (VLAN 30). Map the addressing plan directly to router subinterfaces and build an 802.1Q trunk on the access switch. Verify end-to-end reachability and troubleshoot an allow-list drift scenario.

CCNA55 min5 objectives

Native VLAN on a Router-on-a-Stick Trunk

Build and verify inter-VLAN routing using router-on-a-stick with a native (untagged) VLAN on the trunk. Configure one router (subinterfaces only), one Layer-2 access switch (VLANs, access ports, and a single 802.1Q trunk), and two end hosts in different VLANs. The management VLAN 99 rides untagged as the trunk's native VLAN, so the router subinterface must use 'encapsulation dot1Q 99 native' and the switch trunk must match 'switchport trunk native vlan 99'. Verify from Linux hosts and IOS 'show' commands, then practice troubleshooting common native-VLAN faults.

CCNA50 min4 objectives

Selective Inter-VLAN Reachability: Guest Isolation

Build a router-on-a-stick design with three VLANs (SALES, HR, GUEST) on a single router and single access switch, then enforce guest isolation using a single extended ACL applied inbound on the Guest subinterface. SALES and HR can reach each other; GUEST can reach only its default gateway and is blocked from internal subnets. The lab focuses on correct 802.1Q tagging, trunking, access port assignments, ACL placement/order, and end-host verification.

CCNA55 min5 objectives

Three-VLAN Router-on-a-Stick: Build, Harden & Verify

Build and verify a three-VLAN router-on-a-stick design: one IOS router provides inter-VLAN routing via 802.1Q subinterfaces to a single Layer-2 access switch, with three Alpine hosts in VLANs 10, 20, and 30. The starter environment does not yet forward traffic correctly between all three VLANs, so you will apply a disciplined router-switch-host verification method to diagnose and fix the problem, then briefly break and restore one VLAN's connectivity before finishing with an enterprise-clean, hardened trunk.

CCNA68 min5 objectives

CCNA Port Security 1: Enable & Verify on Access Ports

Hands-on fundamentals with Cisco port security on host-facing access ports. Build a small two-switch campus with a trunk, place two Linux hosts in the same user VLAN, then enable port security with the explicit defaults (maximum 1, violation shutdown) on both host ports. Verify secure-up state and baseline host connectivity.

CCNA40 min4 objectives

Free with an account

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.

CCNA55 min5 objectives

A Policy-Correct Multi-VLAN Trunk

Build a single 802.1Q trunk between two Layer-2 switches that correctly carries three VLANs with an explicit allow-list and a dedicated non-default native VLAN. Place hosts in Users (VLAN 10) across both switches and a server in Servers (VLAN 20). Verify that the trunk allows VLANs 10, 20, and 99, that the native VLAN matches on both ends, and that same-VLAN hosts communicate across the trunk. Then intentionally break and restore the configuration to practice troubleshooting trunk allow-lists, native VLAN alignment, and host VLAN placement.

CCNA47 min5 objectives

CCNA: Pruning the Allowed VLAN List on Trunks

Hands-on CCNA lab focusing on 802.1Q trunk allow-lists. Build a realistic three-switch campus with two user hosts in VLAN 10. First bring up trunks carrying all VLANs by default, then implement an explicit allowed VLAN list and prune a non-used VLAN. Intentionally remove VLAN 10 from one trunk to observe an outage, verify with Linux pings and IOS show commands, and restore service by fixing the allow-list. Reinforce native VLAN alignment and compare default vs explicit trunk policy.

CCNA48 min5 objectives

CCNA Capstone: Port Security Troubleshooting

Advanced CCNA port-security troubleshooting on a pure Layer-2 design. Two access switches linked by an 802.1Q trunk carry a Users VLAN across closets. Three Alpine Linux hosts are pre-addressed. The lab is intentionally shipped with multiple classic faults: one access port is err-disabled due to a prior port-security shutdown, one user-facing port lacks port-security altogether, another has the wrong violation mode and an overly restrictive maximum, and one port has an incorrect static secure-MAC configured. Your job is to diagnose using show commands, restore connectivity, and implement the intended security posture with sticky MACs, the correct maximum, the proper violation mode, and errdisable auto-recovery—without placing port-security on the trunk.

CCNA55 min6 objectives

CCNA Port Security: Maximum Secure MACs on Access Ports

Deploy and verify port security maximum settings on host-facing access ports in a pure Layer-2 campus with two access switches uplinked to a distribution switch. You will raise the allowed secure MAC count to 2 on each user port to support a PC and a potential downstream device (e.g., a dock), then verify with show commands. No Layer-3, SVIs, or routing are used; focus purely on access VLANs, trunks, and the port-security maximum behavior.

CCNA45 min4 objectives

Extended ACL: Application Filtering at a Hardened Edge

Build a 5-node edge/DMZ topology. Implement a named extended ACL on the EDGE router to allow only TCP/80, TCP/443, and ICMP echo from the Inside LAN to a DMZ web server, deny all other traffic to that server with logging, and still permit general traffic elsewhere. Apply the ACL inbound on the EDGE inside LAN interface. Harden router SSH management with a standard ACL. Verify with wget, ping, and an intentionally denied SSH attempt that increments the deny log counter.

CCNA55 min5 objectives

CCNA Static Routing: Redundant Branch Triangle

Build a 3-router triangle with two branch LANs and real Alpine clients. Deploy primary static routes via the hub and floating backup statics over a direct branch-to-branch link. Verify reachability, path selection, and failover by simulating a hub outage.

CCNA65 min5 objectives

Port Security: Err-Disable Auto Recovery

Configure port security in shutdown mode on host-facing access ports and enable automatic errdisable recovery for psecure-violation. The lab uses two Layer-2 switches connected by a trunk and three Linux hosts in the same VLAN to validate baseline L2 connectivity. You will deploy and verify the global errdisable recovery timer and cause while keeping the trunk healthy. Focus is on deterministic configuration and verification via show commands rather than attempting to trigger live violations.

CCNA45 min4 objectives

CCNA Port Security: Violation Protect vs Restrict

Deploy and compare the two non-disabling port-security violation modes on host-facing access ports. Build a small Layer-2 topology with a trunk between two switches and same-VLAN hosts. Configure violation protect on one access port and restrict on another using deterministic sticky MAC entries. Validate baseline reachability, then observe the different behaviors: protect silently drops with no counter/logs; restrict drops and increments the violation counter.

CCNA45 min4 objectives

802.1Q Trunk Fundamentals: Static Trunk and VLANs

Build a static 802.1Q trunk between two Layer-2 switches to carry VLANs 10 and 20. Map hosts to access ports, verify trunk encapsulation and allowed VLANs, demonstrate same-VLAN reachability across the trunk, and confirm inter-VLAN isolation. Then simulate an allow-list drift fault, diagnose with show commands, and restore service.

CCNA45 min5 objectives

Free with an account