CCNA NAT4: PAT Overload onto a Pool

Bundle lab · $29.99

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.

Learning objectives

• Configure PAT (overload) using a NAT pool with a single global address
• Mark inside and outside NAT interfaces correctly so translations occur across the edge
• Build a source-selection ACL for NAT and validate its hit counters
• Verify concurrent inside sessions share one public IP via distinct port mappings
• Interpret NAT translation and statistics outputs to confirm overload behavior

Troubleshooting focus

• No translations appear: verify inside/outside roles and that traffic crosses the edge
• ACL 1 does not match: confirm source network and wildcard mask
• Return traffic fails: ensure the edge router has a default route to the ISP
• Only one host works intermittently: confirm overload is configured on the pool