| 3.2 | Layer 2 Protocol Overview - LAN Protocols | ||
| 3.2.10 | FDDI troubleshooting |
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FDDI supports a self-healing capability in
its dual-attached configuration by using the two rings to wrap
around a failure. When this capability is used, the actual
direction of the flow of the token through the rings will vary from
the norm. Given that wraparound is indicative of an error state, this
shouldn't be surprising. To better understand the FDDI self-healing
capability, consider the example presented in Figure It is important to note that FDDI is equally capable of recovering from failures of physical devices on the network, as well as just cable breaks. Figure
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