Command References
590 commands across four Cisco platforms — each with real CLI output, syntax, use cases, common mistakes, and troubleshooting guidance. Built for daily device configuration, not just exam prep.
Cisco IOS / IOS-XE
Routers and Catalyst switches — routing protocols, switching, security, NAT, DHCP, QoS, and management. The everyday command set for enterprise networks.
Cisco NX-OS
Nexus data center switches — vPC, VxLAN, port channels, and data center fabric commands with NX-OS-specific syntax and verification.
Cisco IOS-XR
Service provider routers — IS-IS, MPLS, BGP, and the commit-based IOS-XR configuration model used in carrier networks.
Cisco ASA
ASA firewalls — NAT, VPN (IPSec/SSL), ACLs, failover, and security policy commands for perimeter and remote-access deployments.
Real CLI Output
Every command page shows actual device output with field-by-field explanations — not just syntax.
Troubleshooting Context
Common mistakes, verification commands, and what good vs. bad output looks like in production.
Config Scenarios
Step-by-step configuration walkthroughs with topology context and gotchas engineers hit in the field.
More Reference Material
Pair command references with troubleshooting scenarios and the IT glossary for the full picture.