Endace Measurement Systems Limited
http://www.endace.com
EDM01.05-05r1 DAG 3.6E Card User Manual
Copyright, all rights reserved.
4
Revision 6. 8 August 2005.
1.3.1 DAG 3.6EP Card Architecture
, continued
Records
transfer
Records transfer from FIFO into lower FPGA, which has interfaces to the
PCI bus and then all records are written to host memory.
1.3.2. DAG 3.6ET Card Architecture
Description
The DAG 3.6ET is designed for tapping both directions of a single copper
10 or 100Mbps Ethernet link in a completely passive and fail-safe manner.
The DAG card will capture from half duplex or full duplex links. The
DAG card does not interfere in the link negotiation process in any way, so
full duplex links will remain full duplex after being connected through the
DAG card.
Ethernet
framers
A single half or full-duplex 10 or 100Mbps Ethernet connection passes
into one port of the DAG card, and out the other un-interrupted.
Two Ethernet framers look at data travelling in each direction on the
connection without interfering with the link. The DAG card cannot
transmit onto this link at all, and even if the DAG 3.6ET is turned off the
network link integrity is assured.
Packet time
stamping
Serial Ethernet data is received by the interface, and fed through a framer
into the upper of two Xilinx FPGA’s. This FPGA contains an Ethernet
processor and the DUCK timestamp engine.
Because of component close association, packets are time-stamped
accurately. Time stamped packet records are then stored in a FIFO.
Records
transfer
Records transfer from FIFO into lower FPGA, which has interfaces to the
PCI bus and then all records are written to host memory.
Description
The DAG 3.6E and associated data capture system minimum operating
requirements are:
•
PC, at least Pentium II 400 MHz, Intel 440BX, GX or newer chip set
•
256 MB RAM
•
At least one free PCI free slot with 3.3V and 5V power
•
Software distribution requires free space of 30MB
Operating
system
For convenience, a Debian 3.1 [Sarge] Linux system is included on the
Endace Software Install CD. Endace currently supports Windows XP,
Windows Server 2000, Windows Server 2003, FreeBSD, RHEL 3.0, and
Debian Linux operating systems.
Different
system
For advice on using a system substantially different from that specified
above, contact Endace support at
