How STP Works
6-5
2
After all the bridges on the network have determined the configuration
of their ports, each bridge only forwards traffic between the Root Port
and the ports that are the Designated Bridge Ports for each network
segment. All other ports are
blocked
, which means that they are
prevented from forwarding traffic.
STP Reconfiguration
In the event of a network failure, such as a segment going down, the
STP system reconfigures the network to cater for the changes. If the
topology of your network changes, the first bridge to detect the
change
sends out an SNMP trap.
An Example
Figure 6-4 illustrates part of a network. All bridges have a path cost
value assigned to each port, identified by PC=
xxx
(where
xxx
is the
value).
Figure 6-4
Port costs in a network
F24user.bk Page 5 Wednesday, July 15, 1998 4:27 PM
Summary of Contents for 8271 Nways Ethernet LAN Switch
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Page 14: ...4 SAFETY NOTICES F24user bk Page 4 Wednesday July 15 1998 4 27 PM...
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Page 16: ...6 SAFETY NOTICES F24user bk Page 6 Wednesday July 15 1998 4 27 PM...
Page 20: ...10 ABOUT THIS GUIDE F24user bk Page 10 Wednesday July 15 1998 4 27 PM...
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Page 38: ...1 16 CHAPTER 1 INTRODUCING THE SWITCH F24user bk Page 16 Wednesday July 15 1998 4 27 PM...
Page 58: ...3 10 CHAPTER 3 SETTING UP FOR MANAGEMENT F24user bk Page 10 Wednesday July 15 1998 4 27 PM...
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Page 139: ...IV PROBLEM SOLVING Chapter 8 Problem Solving F24user bk Page 9 Wednesday July 15 1998 4 27 PM...
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Page 150: ...8 10 CHAPTER 8 PROBLEM SOLVING F24user bk Page 10 Wednesday July 15 1998 4 27 PM...
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Page 157: ...Important Safety Information A 5 F24user bk Page 5 Wednesday July 15 1998 4 27 PM...
Page 173: ...Important Safety Information A 21 F24user bk Page 21 Wednesday July 15 1998 4 27 PM...
Page 174: ...A 22 APPENDIX A SAFETY INFORMATION F24user bk Page 22 Wednesday July 15 1998 4 27 PM...
Page 184: ...D 4 APPENDIX D PIN OUTS F24user bk Page 4 Wednesday July 15 1998 4 27 PM...
Page 188: ...F 2 APPENDIX F TECHNICAL SUPPORT AND SERVICE F24user bk Page 2 Wednesday July 15 1998 4 27 PM...
Page 210: ...6 INDEX F24user bk Page 6 Wednesday July 15 1998 4 27 PM...