Siemens DataNET Hub (DNH) User Manual page 90

Command Descriptions,
"trace" Command
82 • • • • Command Summary
Continued
The trace command controls the hub's frame tracing function. This fea-
ture captures network messages sent and received by the hub-half in
that hub-half's event buffer. The trace command controls which mes-
sages are captured in the event buffer.
Trace messages may be collected for the Ethernet port, the cross-link
port, any of the 8 downstream ports or the single upstream port. Trace
data may be filtered to collect only input frames, output frames, or data
frames (excluding protocol-only frames such as poll/acknowledge). The
hub will not capture any frames until the "trace on" command is given.
Before issuing "trace on," the user can set up trace filtering as described
below. By default, tracing is set up for all frames on the Ethernet port.
To set up tracing, the trace command is followed by a list of ports and a
filter mode. The port list is a comma-separated list, which may include
any of:
Numerals "1" through "9"
ethernet
cross
The filter specification may be one of:
data
input
output
all
The port and filter options may be commanded separately or combined
into a single command:
sets up tracing for all frames on the Ethernet link.
The "downstream" ports are num-
bered 1 through 8, and the upstream
port is numbered 9.
Specifies the Ethernet port
Specifies the cross-link
Trace all data frames (i.e., exclude
frames that do not carry encapsu-
lated Ethernet data).
Trace only input data frames.
Trace only output data frames
Trace all frames, including "protocol-
only" frames on DataNET links.
trace ethernet all
trace 2 input
2000585-001