Level 2 protocols


Mac level

Analyzer recognized the typical MAC level of the 802.3 network and the MAC level of the Ethernet II network (which does not need the LLC level).

802.3

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DSAP
DSAP SSAP
SSAP
LEN ...
...
LLC PDU (0 -> 1500 byte)
...
PAD (0 -> 46 byte)
...
FCS

Ethernet v.2.0

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DSAP
DSAP SSAP
SSAP
TYPE ...
...
Data (46 -> 1500 byte)
...
FCS

 


LLC level

The LLC level is typical of IEEE 802 networks. Here it is also the SNAP version which is used to support the protocol which are not defined by ISO.

LLC (standard)

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DSAP SSAP CONTROL ...
Data

LLC/SNAP

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DSAP=AAH SSAP=AAH CONTROL=03H OUI
OUI Protocol Type
Data