Cabletron Systems DELHF-UA, User Manual

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Chapter 4: LANVIEW LEDs
4-4 DELHF-UA User’s Guide
4.2 DELHF-UA LED STATE DEFINITIONS
• Through-A -
The flow of the primary ring is entering the MAC from
port A (primary ring in) and exiting through port B (primary ring out).
The secondary ring is isolated from the MAC with the flow entering
from port B (secondary ring in) and exiting through port A (secondary
ring out).
• Through-B -
The flow of the primary ring is entering the MAC from
port B (primary ring in) and exiting through port A (primary ring out).
The secondary ring is isolated from the MAC with the flow entering
from port A (secondary ring in) and exiting through port B (secondary
ring out).
• Wrap-A -
The flow of the primary ring is entering through port A
(primary in) and is wrapped by the DELHF-UA, causing the ring to
exit through port A (secondary out). Port B is disconnected from the
ring. If the DELHF-UA 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 DELHF-UA, causing the ring to
exit through port B (primary out). Port A is disconnected from the
ring. If the DELHF-UA 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 DELHF-UA,
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
DELHF-UA is configured to be a dual homed device.