Viavi Xgig, Руководство пользователя

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Chapter 17, Annotated Traces, Expert Traces, and Decode Switches Decode Switches
388 Xgig Analyzer User’s Guide
Viavi Signatures
Some Viavi traffic generator products add some records into the data portion of the traffic. This is
the case for Load Tester and Medusa Labs Test Tools (MLTT). This switch enables decoding of
these records. MLTT adds a special record at the beginning of every SCSI data block transferred.
The record is typically found at every 512-byte boundary of the SCSI data. Load Tester records are
inserted at the beginning of the Fibre Channel payload for every frame. The following choices are
available:
•
Don't Decode Viavi Signatures
This option disables the decoding of the special records. This is the default setting.
•
Medusa Labs Tools I/O Signature
This option enables the decoding of the MLTT Signature records every 512 bytes in the SCSI
data. This switch enables decoding of these special records.
• Medusa Labs Test Tools IO Signature/Timestamp in secs
This option is the same as the previous one, except that an additional 32-bit timestamp is
decoded at the end of the record. This timestamp is added to the record if specified by
command-line arguments within the MLTT tools when the capture is created.
• Medusa Labs Test Tools IO Signature/Timestamp in ms
This option is the same as the previous one, except that an additional 16-bit millisecond
resolution timestamp is added after the 32-bit timestamp. This timestamp is also added by
command-line argument.
• Load Tester Signature (at beginning of payload)
This option enables the decoding of 24-byte Load Tester records at the beginning of the Fibre
Channel payload for every FCoE frame.
•
Load Tester Signature (at end of payload)
This option enables the decoding of 24-byte Load Tester records at the end of the Fibre
Channel payload for every FCoE frame.
• Load Tester Truncated Signature
This option enables the decoding of a 14-byte Load Tester record at the beginning of the
payload for UDP frames only.
SAS/SATA Interpretations
• ATA Cmd Interpretation
Sets the bit length for interpretation of ATA commands within SAS/SATA frames.
The
original specification for the ATA interface only provides 28-bits with which to
address devices.
Select
ATA 28 Bit LBA Cmd Mapping
if this type of addressing is used.
48-bit Logical Block Addressing (LBA)
is a technology which extends the capacity of
IDE ATA/ATAPI.
Select
ATA 48 Bit LBA Cmd Mapping
if this type of addressing is used.
• SATA PM Port Interpretation
Port multipliers are silicon-based devices that allow a single Serial ATA port to communicate
with multiple drives.
SAS PM Port Interpretation should be set to Show PM Port if a SATA
Port Multiplier is available in the configuration. The PM Port field in SATA Frames is
decoded when this switch is set; otherwise, this field is reserved. Also, some Port Multiplier
specific commands will be decoded when this switch is set.