# Viewing statistics using EDM

EDM gathers Ethernet statistics that can be graphed in a variety of formats or saved to a file that can be exported to an outside presentation or graphing application.

Use the following procedures to view RMON ethernet statistics.

## Prerequisites

- Open one of the supported browsers.

- Enter the IP address of the switch to open an EDM session.

## Procedure steps

1. In the Device Physical View, select a port.

2. From the navigation tree, double-click Graph.

3. In the Graph tree, double-click Port.

   OR

   Right-click the port, and choose Graph.

   The Graph Port screen appears.

4. In the work area, click the Rmon tab to view RMON ethernet statistics.

## Variable definitions

The following table describes the fields on the Rmon tab.

Field | Descriptions
--- | ---
Octets | Indicates 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 | Indicates the total number of packets (including bad packets, broadcast packets, and multicast packets) received.
BroadcastPkts | Indicates the total number of good packets received that were directed to the broadcast address. This does not include multicast packets.
MulticastPkts | Indicates the total number of good packets received that were directed to a multicast address. This number does not include packets directed to the broadcast address.
CRCAlignErrors | Indicates the total number of packets received that had a length (excluding framing bits, but including FCS octets) of between 64 and 1518 octets, inclusive, but had either a bad Frame Check Sequence (FCS) with an integral number of octets (FCS Error) or a bad FCS with a nonintegral number of octets (Alignment Error).
UndersizePkts | Indicates the total number of packets received that were less than 64 octets long (excluding framing bits but including FCS octets) and were otherwise well formed.
OversizePkts (>1518) | Indicates the total number of packets received that were longer than 1518 octets (excluding framing bits but including FCS octets) and were otherwise well formed.
Fragments | Indicates the total number of packets received that were less than 64 octets in length (excluding framing bits but including FCS octets) and had either a bad Frame Check Sequence (FCS) with an integral number of octets (FCS Error) or a bad FCS with a nonintegral number of octets (Alignment Error). Normal behavior for etherStatsFragments is to increment because it counts both runts (which are normal occurrences due to collisions) and noise hits.
Collisions | Indicates the best estimate of the total number of collisions on this Ethernet segment.
Jabbers | Indicates the total number of packets received that were longer than 1518 octets (excluding framing bits, but including FCS octets), and had either a bad Frame Check Sequence (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 a packet exceeds 20 ms. The allowed range to detect jabber is between 20 ms and 150 ms.
1..64 | Indicates the total number of packets (including bad packets) that were transmitted and received on this port between 1 and 64 octets in length (excluding framing bits but including FCS octets).
65..127 | Indicates the total number of packets (including bad packets) that were transmitted and received on this port between 65 and 127 octets in length (excluding framing bits but including FCS octets).
128..255 | Indicates the total number of packets (including bad packets) that were transmitted and received on this port between 128 and 255 octets in length (excluding framing bits but including FCS octets).
256..511 | Indicates the total number of packets (including bad packets) that were transmitted and received on this port between 256 and 511 octets in length (excluding framing bits but including FCS octets).
512..1023 | Indicates the total number of packets (including bad packets) that were transmitted and received on this port between 512 and 1023 octets in length (excluding framing bits but including FCS octets).
1024..1518 | Indicates the total number of packets (including bad packets) that were transmitted and received on this port between 1024 and 1518 octets in length (excluding framing bits but including FCS octets).

Statistic | Description
--- | ---
Poll Interval | Statistics are updated based on the poll interval. The default value is 10s. Valid range is None, 2s, 5s, 10s, 30s, 1m, 5m, 30m 1h.
Absolute | Indicates the total count since the last time counters were reset. A system reboot resets all counters.
Cumulative | Indicates the total count since the statistics tab was first opened. The elapsed time for the cumulative counter is shown at the bottom of the graph window.
Average/sec | Indicates the cumulative count divided by the cumulative elapsed time.
Minimum/sec | Indicates the minimum average for the counter for a polling interval over the cumulative elapsed time.
Maximum/sec | Indicates the maximum average for the counter for a polling interval over the cumulative elapsed time.
LastVal/sec | Indicates the average for the counter over the last polling interval.