Evidence / Cisco IOS

Built after SkillsUSA Nationals exposed a specific weakness: console speed under time pressure.

A practice package designed to be repeated, checked, and broken.

Package at a glance

All numbers come from the local package inventory and validation report.

More than a finished configuration.

Core topology: 5 nodes / 5 links
Practice states: Blank / hints / answer
Break-fix tickets: 5 documented scenarios
Full package: 12 topology files

Core topology

PC1-DESKTOP
     |
SW2-ACCESS == LACP == SW1-DIST
                            |
                       R1-CAMPUS
                            |
                        ISP-FAKE

The guided lab stays within the CML-Free five-node limit and uses IOL/IOL-L2-friendly definitions.

Skills practiced

VLANs, access ports, trunks, and router-on-a-stick
LACP EtherChannel and mismatch troubleshooting
DHCP, NAT/PAT, ACLs, and default routing
IPv4, IPv6, OSPFv2, and OSPFv3
Show-command verification and self-grading

Break-fix coverage

Five failures with a defined check path.

PC receives no address

Check the access VLAN, trunk state, EtherChannel, DHCP pool, and lease table.

EtherChannel will not bundle

Compare LACP mode, native VLAN, allowed VLANs, and member-interface configuration.

NAT does not work

Verify the default route, inside and outside designations, and the source-matching ACL.

IPv6 route is missing

Check unicast routing, OSPFv3 interface activation, addressing, and unique router IDs.

Switch management is unreachable

Verify the management VLAN, trunk allowance, SVI state, and switch default gateway.

Validation boundary

What the local checks do and do not prove.

The package passed local checks for YAML syntax, node and link consistency, duplicate IDs, and documentation presence. Those checks do not guarantee every file will import on every CML server because installed node definitions and licensed images still matter.

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