Your team runs a nightly inventory script against 60 IOS XE switches with Netmiko. On the largest chassis, show interfaces status takes about 40 seconds to finish, and a matching TextFSM template is already installed. The report needs one dictionary per port with port, status and vlan fields, while the script keeps driving devices through its existing Netmiko connection. Which combination of Netmiko command call and output parsing meets those needs?

The combination of read_timeout=60 and use_textfsm=True meets both needs: the 60-second timeout lets the largest chassis finish its roughly 40-second command, and the installed matching TextFSM template parses the output into dictionaries containing port, status, and vlan while the script uses its existing Netmiko connection. Calling send_command with a 60-second timeout and using a maintained regular-expression parser could also produce dictionaries, but it bypasses the available TextFSM template, so it does not use the stated parsing setup. Calling send_command with use_textfsm=True applies the template, but relying on the default read timeout may cause the command to time out before the slow chassis returns its output; parsing cannot help if the output is not received. Using a NAPALM IOS driver can retrieve parsed interface data, but it uses a separate NAPALM device session rather than continuing through the existing Netmiko connection. Exam caveat: the default read timeout can vary by Netmiko version and configuration, so success on smaller devices does not prove it is long enough for the largest chassis. Practical check: test the largest chassis, confirm the returned dictionaries include port, status, and vlan, and verify the command completes within the configured timeout.