Use this procedure to display and graph RMON Ethernet statistics.
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Step | Action |
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1 |
On the Device Physical View, click a port. |
2 |
From the navigation tree, double-click Graph. |
3 |
In the Graph tree, double-click Port. |
4 |
Click the Rmon tab. |
5 |
On the toolbar, select a Poll Interval from the list. |
6 |
On the toolbar, you can click Clear Counters to reset the IP statistics counters. |
7 |
To select statistics to graph, click a statistic type row under a column heading. |
8 |
On the toolbar, click Line Chart, Area Chart, Bar Chart, or Pie Chart. |
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--End-- | |
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Use the data in the following table understand RMON Ethernet statistics.
Variable | Value |
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Octets | The total number of octets of data (including those in bad packets) received on the network (excluding framing bits but including FCS octets). You can use this object as a reasonable estimate of Ethernet utilization. For greater precision, sample the etherStatsPkts and etherStatsOctets objects before and after a common interval. |
Pkts | The total number of packets (including bad packets, broadcast packets, and multicast packets) received. |
BroadcastPkts | The total number of good packets received that are directed to the broadcast address. This does not include multicast packets. |
MulticastPkts | The total number of good packets received that are directed to a multicast address. This number does not include packets directed to the broadcast address. |
CRCAlignErrors | The total number of packets received with a length (excluding framing bits, but including FCS octets) of between 64 and 1518 octets, inclusive, but with either a bad FCS with an integral number of octets (FCS Error) or a bad FCS with a nonintegral number of octets (Alignment Error). |
UndersizePkts | The total number of packets received that are less than 64 octets long (excluding framing bits but including FCS octets) and were otherwise well formed. |
OversizePkts (>1518) | The total number of packets received that are longer than 1518 octets (excluding framing bits but including FCS octets) and were otherwise well formed. |
Fragments | The total number of packets received that are less than 64 octets in length (excluding framing bits but including FCS octets) and with either a bad FCS with an integral number of octets (FCS Error) or a bad FCS with a nonintegral number of octets (Alignment Error). For etherStatsFragments to increment is normal because it counts both runts (which are normal occurrences due to collisions) and noise hits. |
Collisions | The best estimate of the total number of collisions on this Ethernet segment. |
Jabbers | The total number of packets received that are longer than 1518 octets (excluding framing bits, but including FCS octets), with either a bad FCS with an integral number of octets (FCS Error) or a bad FCS with a non-integral number of octets (Alignment Error). Jabber is defined as the condition where any packet exceeds 20 ms. The allowed range to detect jabber is between 20 ms and 150 ms. |
1..64 | The total number of packets (including bad packets) received that are less than or equal to 64 octets in length (excluding framing bits but including FCS octets). |
65 ..127 | The total number of packets (including bad packets) received that are greater than 64 octets in length (excluding framing bits but including FCS octets). |
128 ..255 | The total number of packets (including bad packets) received that are greater than 127 octets in length (excluding framing bits but including FCS octets). |
256..511 | The total number of packets (including bad packets) received that are greater than 255 octets in length (excluding framing bits but including FCS octets). |
512..1023 | The total number of packets (including bad packets) received that are greater than 511 octets in length (excluding framing bits but including FCS octets). |
1024..1518 | The total number of packets (including bad packets) received that are greater than 1023 octets in length (excluding framing bits but including FCS octets). |