
216 Chapter 10 RMON
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Enabling Ethernet statistics gathering
You can use RMON to gather Ethernet statistics.
To gather Ethernet statistics:
1 From the Device Manager main menu, choose RMON > Control.
The RMONControl dialog box opens with the History tab displayed.
2 Click the Ether Stats tab.
The Ether Stats tab opens (Figure 115).
CRCAlignErrors The number of packets received during a sampling interval that were
between 64 and 1518 octets long. This length included Frame Check
Sequence (FCS) octets but not framing bits. The packets had a bad
FCS with either an integral number of octets (FCS Error), or a
non-integral number of octets (Alignment Error).
UndersizePkts The number of packets received during the sampling interval were
less than 64 octets long (including FCS octets, but not framing bits.
OversizePkts The number of packets received during the sampling interval were
longer than 1518 octets (including FCS octets, but not framing bits,
and were otherwise well formed.
Fragments The number of packets received during the sampling interval were
less than 64 octets long (including FCS octets, but not framing bits.
The packets had a bad FCS with either an integral number of octects
(FCS Error), or a non-integral number of octets (Alignment Error).
Collisions The best estimate of the number of collisions on an Ethernet segment
during a sampling interval.
Table 86 Rmon History statistics tab fields (continued)
Field Description
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