Layer 3 roaming is characterized by its ability to provide seamless roaming for clients across access points (APs) that are connected to different Layer 3 networks and belong to different mobility groups. This type of roaming ensures that clients can maintain their IP address and continue their sessions uninterrupted as they move between APs, which may be on different subnets or VLANs. References: Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) training materials