Allied Telesis GS910 Series - Examples Within a Loop Prevention Switch

Chapter 1: Product Description
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Figure 14. AT-GS910 and Regular Switches for Loop Prevention
In an example shown in Figure 15, the AT-GS910 switch and a regular
switch form a link. The regular switch is causing a loop. When receiving a
Loop Prevention frame, the AT-GS910 switch blocks its port.
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Figure 15. AT-GS910 and Regular Switches for Loop Prevention - Case 3
Examples within
a Loop
Prevention
Switch
In examples shown in Figure 16, the ports of the AT-GS910 switch
connected. When Loop Prevention is enabled, the GS910 series switch
blocks the port with the higher port number than the link partner port.
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Figure 16. AT-GS910 Switch with Loop Prevention