EDM01-36v10 DAG_9.2X2_Card_User_Guide - Configuring the DAG card
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©2010 - 2012 Endace Technology Ltd. Confidential - Version 10 - May 2012
overlap/nooverlap
Configures the
rx
and
tx
memory hole to be overlapped. This enables in-line forwarding without
copying the data between the stream buffers.
Example
dagconfig overlap
dagconfig nooverlap
Note:
This option is only applicable on firmware images containing TX.
For further details refer to
EDM04-04 dagfwddemo User Guide
.
PCI
Describes the following information about the DAG card.
•
Bus speed - 1.0, 2.0 or 3.0.
•
Number of lanes - x1, x2, x4 or x8.
•
Data throughput - dependent on the bus speed and number of lanes.
Example
PCI Burst Manager:
PCI-e 2.0 x8 (32Gbs)
relative
Applicable to TR-TERF - set to Relative Timed Release mode.
In Relative Timed Release Mode, each packet is transmitted according to its timestamp, relative to the
first packet in the transmit stream. This is shown in the following example where Packet A will be
transmitted immediately, Packet B will be transmitted one second later and Packet C will be transmitted
one second after that:
Packet A: Timestamp = 2006-07-24 03:45:55.9720326 UTC
Packet B: Timestamp = 2006-07-24 03:45:56.9720326 UTC
Packet C: Timestamp = 2006-07-24 03:45:57.9720326 UTC
If for any reason the transmission of Packet B is delayed, the module will still attempt to transmit Packet
C two seconds after Packet A. It will do this even if it means reducing the gap between Packet B and
Packet C.
When using multiple output ports in this mode the timing for both ports is maintained. This is shown in
the following example where on port A Packet 4 is transmitted three second after Packet 1 and on port B
Packet 3 is transmitted one second after Packet 2. The Packet 2 is transmitted one second after Packet 1
even when they are send out on independent ports.
Packet 1 (Port A): Timestamp = 2006-07-24 03:45:55.9720326 UTC
Packet 2 (Port B): Timestamp = 2006-07-24 03:45:56.9720326 UTC
Packet 3 (Port B): Timestamp = 2006-07-24 03:45:57.9720326 UTC
Packet 4 (Port A): Timestamp = 2006-07-24 03:45:58.9720326 UTC
See also
time_mode
(page 32),
nodelay
(page 29).
Example
dagconfig relative
Notes:
•
The previous version of Relative Mode was port independent and you will see a different release
pattern transferring old files.
•
The relative placement of the packets is accurate to ± 100ns.
