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GS920 Series Gigabit Ehternet Switch Installation and User's Guide
Port Blocked
Within a LAN
When a loop is detected in the example shown in Figure 65, Port 8 on the
Switch C is blocked to relieve the loop. This port has the largest hop count
from the root switch.
Ax
Figure 65. Case 1: Selecting a Port to be Blocked
When a loop is detected in the example shown in Figure 66, Port 1 on the
Switch D is blocked to relieve the loop. Port 1 and Port 9 on Switch D have
the same hop count, but Port 1 is blocked because the switch priority of
Switch C where Port 1 is linked is lower than the switch priority of Switch B
where Port 9 is linked.
Ax
Figure 66. Case 2: Selecting a Port to be Blocked
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