EDM01-02: DAG 4.2S Card User Guide
©2005
32
Version 7: May 2006
Data format
The following is a description of the Type 2 Ethernet record offset field.
Field
Description
offset
Number of bytes not captured from start of frame.
Typically used to skip link layer headers when not
required in order to save bandwidth and space.
This field is currently not implemented, contents
can be disregarded.
Data format
overview
The following is an overview of the data formats used.
Data Format
Description
type
This field contains an enumeration of the frame
subtype. If the type is zero, then this is a legacy
format.
0:
TYPE_LEGACY
1:
TYPE_HDLC_POS
: PoS w/HDLC
framing
2:
TYPE_ETH
: Ethernet
3:
TYPE_ATM
: ATM Cell
4:
TYPE_AAL5
: reassembled AAL5
frame
5:
TYPE_MC_HDLC
: Multi-channel
HDLC frame
6:
TYPE_MC_RAW
: Multi-channel Raw
link data record
7:
TYPE_MC_ATM
: Multi-channel ATM
Cell
8:
TYPE_MC_RAW_CHANNEL
: Multi-
channel raw link data.
9:
TYPE_MC_AAL5
: Multi-channel
AAL5 frame
10:
TYPE_COLOR_HDLC_POS
: PoS with
HDLC framing and packet
classification information.
11:
TYPE_COLOR_ETH
: Ethernet with
packet classification information.
