Watching David Bombal Lab trying to do same as him in GNS3 but I get invalid input detected error in console, below are his results and his project layout and then mine .
Ciscoデバイスの操作 - Cisco IOS - 編集キーとエラーメッセージ
Solved: Invalid input detected at marker when issuing NAT command - Cisco Community
The main error messages in CLI | Cisco Basic | N-Study
asa 5505 - cannot config terminal - invalid input detected at marker - Cisco Community
Command Configure Terminal Invalid input detected issue - Cisco Community
PACKET TRACER / N00b] The show inventory command doesn't work ? : r/Cisco
Ccna1 V7 Cap 1-3 | PDF | Internet Protocol Suite | Computer Network