7 hands-on PAT scenarios you build in your own Cisco Modeling Labs instance and grade against the answer key. Focused PAT configuration and troubleshooting practice for CCNA and CCNP.
Build an Internet-edge NAT design that reaches beyond the ISP to a real external network. You will configure dynamic PAT (overload) from a private LAN to a public /29 using a NAT pool on the edge router, with the router’s default route already pointing to the ISP. Verify that an inside host can reach a public server across the ISP and that translations, counters, and default routing reflect the expected state.
Advanced CCNA NAT/PAT troubleshooting on a compact 5-node CML-Free topology. A pre-broken edge (R1) sits between a private LAN and an ISP transit. Learners diagnose why inside-to-outside traffic never translates: the NAT interface roles are incorrect and the ACL referenced by NAT does not match the actual inside subnet. Fix both independently to restore translations, then verify from hosts and with IOS show commands.
Operate, observe, and clear Cisco IOS PAT translations on an internet edge. You will configure a standard PAT overload on R1, generate multiple concurrent sessions from an inside host, read translation/state counters, and clear single and all entries to see how the table repopulates immediately under live traffic.
Implement Port Address Translation (PAT) using a one-address NAT pool so multiple inside hosts share a single public IP. Reuse the same 5-node topology and addressing as the prior lab; convert the pool to a single address and enable overload. Verify simultaneous connectivity from two inside hosts, observe translations and counters, and contrast with prior pool-exhaustion behavior.
Configure static PAT (port forwarding) on a Cisco IOS edge router so an outside client can reach an inside HTTP service on TCP/8080 using a dedicated public IP that is not the router's interface. Validate using curl from the outside host and NAT show commands on the router.
Implement and verify interface-based PAT (overload) on a single-edge SOHO router. Inside hosts on 192.168.10.0/24 share the router’s lone public IP (203.0.113.1) on its outside interface. Validate NAT translations, ACL matches, and simultaneous host access, and practice troubleshooting common misconfigurations (inside/outside role reversal, ACL selection errors).
Configure PAT on an edge router so only PC-A is translated using a standard ACL as the traffic selector. PC-B remains untranslated and fails to reach the ISP, illustrating that NAT occurs only for traffic explicitly matched by the ACL. Validate using host pings and IOS show commands, and interpret ACL hit counters and NAT tables.
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