Endace DAG 9.2X2 - Using Your DAG Card; Data Capture Introduction

EDM01-36v10 DAG_9.2X2_Card_User_Guide - Using your DAG card
©2010 - 2012 Endace Technology Ltd. Confidential - Version 10 - May 2012 37
Using your DAG card
Introduction
This chapter describes how to complete the following operations for a DAG card:
• Basic data capture (page 37
) - For Enhanced Packet Processing v2 refer to EDM04-31 Enhanced
Packet Processing v2 .
• Viewing captured data (page 40)
• Converting captured data (page 43)
• Using third party applications (page 47)
• Transmitting captured data (page 47)
Basic data capture
dagsnap is a software utility used to write to disk the data captured from a DAG card.
Data is collected in Extensible Record Format (ERF) which can then be viewed using
dagbits, or
converted to other formats using
dagconvert.
When capturing high speed data Endace recommends you use dagsnap, see Capturing data at high
speed (page 39).
For further information on the software utilities see:
• dagsnap (page 38
)
• dagbits (page 40)
• dagconvert (page 43)
Starting a capture session
To start the capture session, type the following at the prompt:
dagsnap -dX –v -o tracefile.erf
(Where X is the device number of the DAG card you want to configure).
Note:
You can use the -v option to provide user information during a capture session although you may want
to omit it for automated trace runs.
By default, dagsnap runs indefinitely. To stop, use CTRL+C . You can also configure dagsnap to run for
a fixed time period then exit.