Hirschmann RS20 Reference Manual page 105

Switching
Parameters Meaning
Address Number of learned MAC addresses on
Relearn different ports within a checking interval. If
Threshold the number of learned addresses reach
this threshold, the device sees this as a
relevant event. The interval for this check
is a few seconds.
Activate Duplex Enable/disable whether the device reports
Mismatch a duplex problem at a port for specific
Detection error events. This means that the duplex
mode of the port might not match that of
the remote port. If the device detects a
potential non-match, it creates an entry in
the trap log and sends an alarm (trap).
To detect potential non-matches, the
device evaluates the error counters of the
port after the connection is set up, in the
context of the port settings
Table 60: Switching:Global dialog
The following table lists the duplex operating modes for TX ports, with the
possible fault events. The meanings of terms used in the table are as follows:

Collisions: In half-duplex mode, collisions mean normal operation.
 Duplex problem: Mismatching duplex modes.
 EMI: Electromagnetic interference.

Network extension: The network extension is too great, or too many
cascading hubs.
 Collisions, late collisions: In full-duplex mode, no incrementation of the
port counters for collisions or late collisions.
 CRC error: The device evaluates these errors as non-matching duplex
modes in the manual full duplex mode.
No. Automatic
configuration
1
On
2
On
3
On
Table 61: Evaluation of non-matching of the duplex mode
RM GUI L2E
Release 8.0 05/2013
Current Detected error
duplex events (≥ 10
mode after link up)
Half duplex None
Half duplex Collisions
Half duplex Late collisions
Possible values Default setting
1 - 1024
On, Off
(see table 61).
Duplex modes Possible causes
OK
OK
Duplex problem
detected
4.1 Switching Global
1
On
Duplex problem, EMI,
network extension
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