Cisco ME-3400G-12CS-A-RF - Ethernet Access Switch Manual de usuario Pagina 124

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© 2009 Cisco Systems, Inc. All rights reserved.
125
Cisco PublicBRKBBA-2006
Spanning Tree… The Spawn of the
Devil? (Not Anymore!)
Convergence and Scalability are extremely improved
through 802.1w and 802.1s (now part of 802.1D-2003 and
802.1Q-2003)
Rapid Convergence (sub-second) and support for multiple STPs
Switches are ‘built’ for Spanning Tree
Special input and output queues on ports for STP
Special CPU queues and CPU handling for STP
All links are full-duplex and collision free—a BPDU send will always get
received
Do not span a VLAN across too many switches
Not even the management VLAN
No need to use a single management VLAN for the
entire topology
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