Stp decoding, Stp and sata traffic over hosts and expanders – Teledyne LeCroy SAS Suite User Manual User Manual

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SASSuite User Manual

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STP Decoding

If STP traffic is present in a trace, you can see it by doing the following:

Step 1 Click the

button to display Transport Layer protocols.

Step 2 Select Search > Go To > Frame Types > STP Frame. The

trace will reposition itself so that the next STP frame appears at
the top of the Trace window.

STP and

SATA Traffic

Over Hosts

and

Expanders

Traffic passing through an Expander may be STP on one side and SATA on the other
side. Also, note that some Expanders support SAS Zoning, if so this information will be
available to view in the trace (see “SAS Zoning” on page 143).

Traces of such setups will show different types of traffic depending on which link(s) were
being recorded.

STP Link Traffic - Traffic on the STP side will have STP transactions but with SATA traffic
embedded within it.

SATA Traffic - Traffic on the SATA side will be purely SATA and have no STP
transactions.