Allied Telesis AT-S62 - Manual (Page 355)

AT-S62 User’s Guide
Section IV: Spanning Tree Protocols 355
If the switches were running STP or RSTP, one of the links would be
blocked because the links constitute a physical loop. Which link would
be blocked would depend on the STP or RSTP bridge settings. In the
example, the link between the two parts of the Production VLAN is
blocked, resulting in a loss of communications between the two parts of
the Production VLAN.
Figure 109 VLAN Fragmentation with STP or RSTP
LINK
MODE LINK
MODE
FAULT
RPS
MASTER
PWR
MODE STATUS
AT-8524M Fast Ethernet Switch
LINK
MODE LINK
MODE
FAULT
RPS
MASTER
PWR
MODE STATUS
AT-8524M Fast Ethernet Switch
Sales
VLAN
Production
VLAN
Untagged
Ports
Untagged
Ports
Blocked
Port