EDM01-02: DAG 4.2S Card User Guide
©2005
10
Version 7: May 2006
Description
When the DAG 4.2S card is powered up for a capture session the top left
LED 1 should always come on, and:
•
LED 2 indicates when a packet capture session is in progress.
•
LED 3 flashes if a PPS signal is being received by the card.
•
LED 4 is only on if the laser is turned on with the
dagfour
utility.
When an OC-48c optical signal is applied.
•
LED 5 should go on.
•
LED 6 should go out.
Figure
Figure 4-3 shows the correct LED state for the DAG 4.2S card without
optical input.
Figure 4-3. DAG 4.2S Card Correct LED Status Without Optical Input.
Description
The
dagfour
utility supports configuration status and physical layer
interface statistics for the DAG 4.2S card.
In a troubleshooting configuration options
–si
should be passed to the tool
to watch the operational status of the optical, SONET and framing layers.
More details about the meaning of the various bits are supplied through the
help page (
dagfour –h)
as well as via the manual page.
4.2 DAG 4.2S Card Capture Session
Description
The DAG 4.2S card uses a VSC9112 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 OC-48c and STM-16c standards.
A successful DAG 4.2S 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.
