Eicon Networks C21 Installationsanleitung PDF herunterladen (Seite 171)

Analyzing Data: ECMODULE TRACE 171

Trace Buffer

Multiple trace buffers may be active at the same time for different port or

connection numbers. The amount of available memory on your Eiconcard

limits the number of traces you can have active. Each time you start a trace,

ECMODULE TRACE sets aside a new trace buffer (default size 2048 bytes)

on the Eiconcard.

Blocks and Protocol Elements

Information in the trace buffer is stored in blocks, with each block being based

on a protocol element. ECMODULE TRACE creates a block by extracting the

first n bytes, as indicated by the /Truncate parameter, from each protocol

element in the data stream.

Changing the Trace Buffer Size

To change the buffer size, use ECMODULE TRACE /SIZE n, where n is the

buffer size. You must stop the trace first. A size of 0 stops the trace.

Protocol Protocol Element

Frame Relay (FRELAY) Frame

HDLC Frame

LAPD Frame

Q931 Message

SDLC Frame

X.25 Packet

SNA Frame

SNAFR Frame

IDLC Frame

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Eicon Networks C21 Installationsanleitung Seite 171