Читать книгу CCNP Enterprise Certification Study Guide: Implementing and Operating Cisco Enterprise Network Core Technologies - Ben Piper, David Higby Clinton - Страница 73

The Shared port type is one you shouldn't expect to see very often. It's for a port that may be connected to multiple devices, usually via a hub. RSTP considers any half-duplex link to be shared. In this case, RSTP falls back to timer-based 802.1D behavior and may take up to 50 seconds to converge.