BPDU Last modified: Monday, December 11, 2000
Acronym for bridge protocol data unit. BPDUs are data messages that are exchanged across the switches within an extended LAN that uses a spanning tree protocol topology. BPDU packets contain information on ports, addresses, priorities and costs and ensure that the data ends up where it was intended to go. BPDU messages are exchanged across bridges to detect loops in a network topology. The loops are then removed by shutting down selected bridge interfaces and placing redundant switch ports in a backup, or blocked, state.
•E-mail this definition to a colleague• For internet.com pages about BPDU . Also check out the following links! Understanding Spanning Tree Protocol  Cisco Systems provides this technically heavy analysis of how spanning tree protocol operates.	Data Data Structures Network Protocols Programming binary tree branch data structure digital access and cross-connect system (DACS) directory hierarchical leaf STP switch tree structure Give Us Your Feedback Shopping BPDU Products Compare Products,Prices and Stores Shop by Category: Camcorder Accessories 9 Model Matches Building Supplies 3 Store Offers Audio and Video Media 1 Store Offers