Dual Attachment Hubs (Dacs) In Wrap State - 3Com 3C780 - LinkBuilder FDDI Base Unit User Manual

You can place a dual attachment hub directly on the trunk ring. This allows it to
participate in ring wrapping if a segment of the trunk fails. Figure 3-2 shows
dual attachment hubs in wrap state.
DAC
B A
Figure 3-2. Dual Attachment Hubs (DACs) in Wrap State
Configuring the Hub
B
DAS
Fault occurred in
dual attached station
3-3
DAC
A