Endace Measurement Systems.
http://www.endace.com
EDM01.05-10r1 DAG 4.3S Card User Manual
13
Revision 6. 22 September 2005.
4.2 DAG 4.3S Card Capture Session
Description
The DAG 4.3S uses an ASIC SONET ATM/PoS physical layer interface
device to support capturing of ATM cells and HDLC encoded Packet-
over-SONET data frames. The card supports both SONET (STS-48c) and
SDH (STM-16c).
A successful DAG 4.3S card capture session is accomplished by checking
the receiver ports optical signal levels and checking the card has correctly
detected the link. This is followed by configuring DAG for normal use.
Procedure
Follow these steps to troubleshoot DAG 4.3S card configuration.
Step 1.
Check Receiver Ports Optical Signal Levels.
The card supports 1300 nanometer single-mode fibre attachments with
optical signal strength between 0 dBm and -18 dBm.
If in doubt, check card receiver ports light levels are correct using an optical
power meter.
The card receiver ports are the lower half of the LC-style connector, the
closest to the LEDs.
Cover unused card transmit ports with LC-style plugs to prevent dust and
mechanical hazards from damaging optics.
Step 2.
Understand Link Layer Configuration
Learn about the link layer configuration in use at the network link being
monitored.
Important parameters include specific scrambling options in use. If the
information cannot be obtained reliably, the card can be made to work by
varying the parameters until data is arriving at the host system.
Step 3.
Check FPGA Image Loaded.
Before configuring the card, ensure the most recent FPGA image is loaded
on the card.
dag@endace:~$ dagrom -rvp –d dag0 -f xilinx/dag43pcix-terf.bit
dag@endace:~$ dagfour -d dag0
light nolaser
link noreset OC48c nofcl noeql
sonet master scramble
ATM discard pscramble norxpkts notxpkts
packet varlen slen=48 noalign64
packetA drop=0
pcix 133MHz 64-bit nodrop routesource=stream0 buf=128MB rxstreams=1 txstreams=1 mem=0:0
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