This read-only counter tallies frames the bridge chose not to forward because their destination was determined to be local to the segment they arrived on. It helps an administrator confirm the bridge is correctly filtering local traffic rather than needlessly flooding it across the backbone, which is normal, expected bridge behavior rather than an error condition. For example, seeing this counter grow steadily on a busy LAN segment full of peer-to-peer file sharing would confirm the bridge is efficiently keeping that local traffic off the WAN links.