Chapter 4: LANVIEW LEDs
•Wrap-A - The flow of the primary ring is entering through port A (primary in) and is wrapped by the HSIM-F6, causing the ring to exit through port A (secondary out). Port B is disconnected from the ring. If the HSIM-F6 LED state indicates “Wrap-A” the ring has lost the redundancy of the secondary ring due to the wrapped condition. This configuration should be repaired, as additional problems could isolate stations from the FDDI ring.
•Wrap-B - The flow of the primary ring is entering through port B (secondary in) and is wrapped by the HSIM-F6, causing the ring to exit through port B (primary out). Port A is disconnected from the ring. If the HSIM-F6 LED state indicates “Wrap-B” the ring has lost the redundancy of the secondary ring due to the wrapped condition. This configuration should be repaired, as additional problems could isolate stations from the FDDI ring.
•Isolated - Both port A and port B are isolated from the ring.
•Dual Homed (Default) - The flow of the primary ring is entering through port B (primary in) and is wrapped by the HSIM-F6, causing the ring to exit through port B (secondary out). Port A is in standby mode, and will take over the functions of port B if port B leaves the ring. This LED sequence is the default setting if the HSIM-F6 is configured to be a dual homed device.
•Dual Homed (Modified) - The flow of the primary ring is entering through port B (primary in) and is wrapped by the HSIM-F6, causing the ring to exit through port B (secondary out). Port A is in standby mode, and will take over the functions of port B if port B leaves the ring. This dual homed LED sequence is set by setting the OID ctsmtmibDualHomeWrpLEDStatus to off.
•Twisted Ring (A-A,B-B) - This condition indicates that the A port of the HSIM-F6 is connected to the A port of another device, and the B port of the HSIM-F6 is connected to the B port of the other device. This is an undesirable ring condition and should be repaired as some stations could be isolated from the primary ring.