Dell PowerConnect 54 Series, User Manual

Page: 365 / 416

Viewing Statistics
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Figure 8-9. RMON History Table
• Sample No. — The specific sample the information in the table reflects.
• Drop Events — The number of dropped packets due to lack of network resources during the sampling
interval. This may not represent the exact number of dropped packets, but rather the number of times
dropped packets were detected.
• Received Bytes (Octets) — The number of data octets, including bad packets, received on the network.
• Received Packets — The number of packets received during the sampling interval.
• Broadcast Packets — The number of good broadcast packets received during the sampling interval.
• Multicast Packets — The number of good Multicast packets received during the sampling interval.
• CRC Align Errors — The number of packets received during the sampling session with a length of
64-1518 octets, a bad Frame Check Sequence (FCS), and with an integral number of octets, or a bad FCS
with a non-integral number.
• Undersize Packets — The number of packets received less than 64 octets long during the sampling
session.
• Oversize Packets — The number of packets received more than 1518 octets long during the sampling
session.
• Fragments — The number of packets received less than 64 octets long and had a FCS during the
sampling session.
• Jabbers — The number of packets received more than 1518 octets long and had a FCS during the
sampling session.
• Collisions — Estimates the total number of packet collisions that occurred during the sampling session.
Collisions are detected when repeater ports detects two or more stations transmit simultaneously.
• Utilization — Estimates the main physical layer network usage on an interface during the session
sampling. The value is reflected in hundredths of a percent.