Cabletron Systems Ethernet Hubs manual Sirm Hubs, IRM2 Hubs

Cabletron Hub LEDs

SIRM Hubs

SIRM Hubs

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

Fail (Error)

This LED is located on the top of the left-hand LED column. It indicates that a problem has been detected with the SIRM.

CLN (Collision Present)

This LED is located on the top of the right-hand LED column and is not labelled in SPECTRUM. It indicates that the SIRM is detecting a collision signal from one of the segments connected to the hub.

Unlabeled 1

This LED is located below the Fail LED. It indicates that the SIRM is receiving network management packets.

Unlabeled 2

This LED is located below the CLN LED. It indicates that the SIRM network management software is on line and functional.

The SIRM modules also contain an RCV and POK LED that are associated with its repeater port and its network management port.

IRM2 Hubs

The IRM2 supports LEDs that represent operating status, collision rates, error rates, packets transmitted, and packets received for the entire hub as follows. The LEDs are listed in top to bottom order, except where otherwise noted.

ER (Error)

This LED indicates that a problem has been detected with the IRM2.

PW (Power)

This LED indicates that the hub is receiving power.

RC (Receive)

This LED indicates the IRM2 is repeating a data packet received from one of the segments connected to the hub chassis.

XM (Transmit)

This LED indicates that the IRM2 is transmitting a data packet out to all other segments connected to the hub chassis.

CL (Collision Present)

This LED indicates the IRM2 is detecting a collision signal from one of the segments connected to the hub chassis.

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