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Decode Switches Chapter 17, Annotated Traces, Expert Traces, and Decode Switches
Xgig Analyzer User’s Guide 389
•
OOB/Speed Negotiation Interpretation
Out-of-Band (OOB) signal and speed negotiation happen on a SAS/SATA link during
initialization and speed negotiation. The default option,
Show 'OOB' and 'Speed Neg.' in
decodes, uses the text “OOB” or “Speed Neg.” as a prefix to every D.C. Idle and Data Burst
event. The other option,
Remove 'OOB' and 'Speed Neg.' from decodes,
omits that prefix
to simplify the decodes.
RDMA/iWARP Interpretations
• DDP Interpretation
Sets the interpretation for the Direct Data Placement (DDP) protocol. Select
RDMA Present
if
the Remote Direct Memory Access (RDMA) protocol is implemented within DDP for the
trace data. Select
DDP Unknown
if DDP is used, but RDMA is not used within DDP. By
default, the option RDMA Present is assumed.
iSER/SRP Interpretation
iSER/SRP Interpretation Sets the interpretation for the iSER (iSCSI RDMA) or SRP (SCSI
RDMA) protocol. Select
iSER Protocol
if this protocol is used in the trace, or select
SRP
Protocol if this one is used instead, or No iSER/SRP Protocol if not used. iSER is a recent IETF
standard extension to iSCSI that includes support for multiple RDMA-based transports including
InfiniBand and Ethernet RDMA. SRP (or SCSI RDMA) is a mapping of SCSI over the InfiniBand
protocol. By default, the option
No iSER/SRP Protocol
is assumed.
IP TOS Interpretation
Sets the interpretation for the Layer-3 Type of Service field. Set the interpretation to
TOS
or
Differentiated . If IP TOS Interpretation is not used or not relevant to your trace analysis, leave all
options unchecked.
Reserved/Obsolete Values
Sets the interpretation for bits that are reserved, vendor-specific, retired, not applicable, or
obsolete. These bits usually do not add value to the decode, therefore the default is to
Hide
Reserved Bits.
However, there are two other options available if you need see these bit values,
Show Reserved Bits and Report Invalid Reserved Bits as Errors .
Information regarding reserved bits displays in the
Tree
view of the
Inspector
. See the figures on
the followings pages to see a Tree view of the same frame with each option selected.
Select
Show Reserved Bits
to see all the reserved bit values in the decode. If bits are reserved,
they are displayed in the decode with an R or Reserved for the field name. If the value for a field
does not apply for the decode of this particular frame, the field is marked as
Not Applicable
.
Select Report Invalid Reserved Bits as Errors to report to all non-zero reserved bits or any field
with a
Reserved
interpretation as errors. The decode marks these values as
(Invalid)
in the
Tree
view display. The decode will also display the error Invalid Reserve Bits in the Errors/Warnings
column. You can search/filter hide frames that have invalid reserve bits using the Quick Find
dialog using
Invalid Reserve Bits in the Errors/Warnings column.