Netplan try rollback behavior during SSH session timeouts

Network Configuration Safety Mechanism

Ubuntu uses Netplan as a declarative abstraction layer to manage network settings via backend renderers such as systemd-networkd or NetworkManager. To prevent permanent loss of connectivity during remote configuration changes, the netplan try command implements a timeout-based rollback mechanism.

Configuration Uncertainty

There is a specific interaction between the netplan try timer and active SSH sessions. While the utility is designed to prevent lockouts, the exact behavior when a session is interrupted or when multiple concurrent sessions exist during the confirmation window is not fully defined in the standard documentation.

• Does the rollback timer reset or persist if an SSH session drops before the user provides confirmation?
• How does the utility determine the primary session for confirmation in a multi-user environment?