Intel 470F - NetStructure Switch User Manual page 20

C H A P T E
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470T Ch2.p65
R 2 Intel® NetStructure
Spanning Tree and VLANs
The 470 switches support the Spanning Tree Protocol across the entire
switch, not per VLAN. If a loop occurs in a VLAN the port is disabled and
all VLAN traffic over that port is blocked.
A good example of this is seen below. Both Switch 1 and Switch 2 have two
port-based VLANs configured. Crossover cables connect the ENG_VLAN
on Switch 1 to ENG_VLAN on and Switch 2. Crossover cables also connect
the MRKT_VLAN on Switch 1 to the MRKT_VLAN on Switch 2. When
Spanning Tree is enabled, the redundant link between the MRKT_VLANs is
blocked and those VLANs can no longer communicate.
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  470T and 470F Switches User Guide  
3/30/00, 5:55 PM