Finisar Surveyor manual Illegal MAC Source Address, Addr=FFFFFFFFFFFF

Expert Features 10

MAC Layer

Illegal MAC Source Address

Counter

Illegal MAC Source Address is a counter of all illegal MAC station source addresses over a period of time per segment. A count of all illegal MAC source addresses displays in the Overview counters of Expert View. A threshold for this counter can be set in Expert Alarms.

Expert Symptom

Illegal MAC source addresses are automatically logged as expert symptoms. The Symptom Summary field provides the illegal address encountered. For example:

Addr=[FFFFFF:FFFFFF]

This symptom can help catch malfunctioning NICs or bad addresses generated due to collisions. Illegal MAC source addresses may be discovered on Ethernet or Token Ring networks.

Diagnostic Details

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Problem Description:

A broadcast Ethernet (or Token Ring) address has appeared as a source address. This is a problem associated with a bad adapter card.

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Probable Cause(s):

1.Someone is transmitting illegal frames using a traffic generator.

2.There may be a faulty adapter card.

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Recommended Action(s):

1.Filter on the Network address to determine which host has the faulty card and replace it.

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