PVST

PVST is the solution to deal with CISCO spanning tree on VLAN-specific solutions. PVST for each running a separate virtual local area network spanning tree instance. Generally PVST claim CISCO ISL running on the relay links between switches.
Chinese per-VLAN spanning name English name Per-VLAN Spanning Tree defects referred pvst each VLAN must generate a tree
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each VLAN Spanning Tree (PVST) maintains a spanning tree instance for each VLAN in the network configuration . It allows the use of a VLAN and ISL relay when the relay is blocked when the number of VLANs to other VLANs forwarding. Although each VLAN PVST treated as a single network, it has the ability to (at layer 2) through a number of VLANs in the backbone and a number of other Vlans not cause circulating in the spanning tree trunk in another load balancing to communicate.