Wireshark-bugs: [Wireshark-bugs] [Bug 10753] New: PROFINET DiagnosisData.ChannelProperties: Main
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Fri, 05 Dec 2014 08:55:18 +0000
Bug ID 10753
Summary PROFINET DiagnosisData.ChannelProperties: Maintenance bit definitions swapped
Product Wireshark
Version 1.12.2
Hardware x86-64
OS Windows 7
Status UNCONFIRMED
Severity Normal
Priority Low
Component Dissection engine (libwireshark)
Assignee bugzilla-admin@wireshark.org
Reporter pek@hms.se 

Build Information:
Version 1.12.2 (v1.12.2-0-g898fa22 from master-1.12)
--
>From specification (PN-AL-protocol_2722_V23Ed2MU1_Mar14), Table 526:
MaintenanceRequired Bit 9; MaintenanceDemanded Bit 10; Usage;
0x00; 0x00; Fault;
0x01; 0x00; Maintenance required;
0x00; 0x01; Maintenance demanded;
0x01; 0x01; QualifiedChannelQualifier[a];
[a]: This indicates that the severity is coded in the field
QualifiedChannelQualifier (see Figure 88).


Note: Maintenance required/demanded bits seem to be swapped in current
implementation.

Steps to reproduce: Product-specific. For a fiber optic device, try pulling the
contact out slightly to reduce the link power margin. This should create
maintenance alarms in two steps; MaintenanceRequired when the margin drops
below 2dB and MaintenanceDemanded when the margin drops below 0dB.

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