7 • Ethernet | T1/E1 DACS Administrators’ Reference Guide |
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Introduction
The DACS provides management and statistical information in the Ethernet window (see figure 16). Most of the descriptions for these MIB variables are from RFC 1643. Detailed information regarding the SNMP MIB
IIvariables may be downloaded from RFC 1643, Definitions of Managed Objects for the
Figure 16. Ethernet window
Click on Ethernet under the Configuration Menu to monitor Ethernet statistics.
Ethernet statistics
Alignment Errors (dot3StatsAlignmentErrors)
A count of frames received that are not an integral number of octets in length and do not pass the FCS check. The count represented by an instance of this object is incremented when the alignmentError status is returned by the MAC service to the LLC (or other MAC user). Received frames for which multiple error conditions obtain are, according to the conventions of IEEE 802.3 Layer Management, counted exclusively according to the error status presented to the LLC.
FCS Errors (dot3StatsFCSErrors)
A count of frames received that are an integral number of octets in length but do not pass the FCS check. The count represented by an instance of this object is incremented when the frameCheckError status is returned by the MAC service to the LLC (or other MAC user). Received frames for which multiple error conditions obtain are, according to the conventions of IEEE 802.3 Layer Management, counted exclusively according to the error status presented to the LLC."
Single Collision Frames (dot3StatsSingleCollision Frames)
A count of successfully transmitted frames for which transmission is inhibited by exactly one collision. A frame that is counted by an instance of this object is also counted by the corresponding instance of either the
46 | Introduction |
