Cabletron Systems Ethernet Hubs manual IRM3 Hubs

Cabletron Hub LEDs

IRM3 Hubs

PO (Port OK)

This LED is lit to indicate that the Network Interface Chip associated with the IRM2’s internal repeater port has passed an internal Loop Back Test and is ready for transmission.

P1 (Port 1 OK)

This LED is lit to indicate that the Network Interface Chip associated with the IRM-2’s external repeater port has passed an internal Loop Back Test and is ready for transmission.

R1(Receive 1)

This LED is located to the left of the P1 LED. It indicates the IRM2 is repeating a data packet received from the segment connected to the IRM2 AUI Port or Fiber Optic Port.

LN (Link)

This LED is located below the IRM2’s AUI port. It indicates that a link has been established between the fiber optic port on the IRM2 and the fiber optic device at the other end of the fiber optic link segment.

IRM3 Hubs

The IRM3 supports LEDs that represent operating status, collision rates, error rates, packets transmitted and packets received for the entire hub as follows:

PW (Power)

This LED is located at the top of the left-hand LED column. It indicates that the IRM3 is receiving power from the MMAC.

OK (Board OK)

This LED is located at the top of the right-hand LED column. If this LED is lit, the module is operating properly. If this LED is not lit, there is an initialization problem. You may need to press the Reset switch.

RC (Receive)

This LED is located below the OK LED. It indicates that the IRM3 is repeating a packet received from a connected segment.

MM (Management)

This LED is located below the PW LED. It indicates that the IRM3 is receiving or transmitting management packets.

CL (Collision)

This LED is located below the MM LED. It indicates that a collision has been detected on a segment.

PO (Port OK)

This LED is located below the RC LED. It indicates that the internal repeater port is OK.

Device Views	Cabletron Ethernet Hubs
2-20	Management Module Guide