Use the following procedure to gather Ethernet statistics.
|
|
Step | Action |
---|---|
|
|
1 |
From the navigation tree, double-click Serviceability. |
2 |
In the Serviceability tree, double-click RMON. |
3 |
In the RMON tree, double-click Control. |
4 |
On the work area, click the Ether Stats tab to view the history. |
|
|
--End-- | |
|
Use the data in the following table help you understand the RMON Ethernet statistics display.
Variable | Value |
---|---|
Index | A unique value assigned to each interface. An index identifies an entry in a table. |
Port | A port on the device. |
DropEvents | The number of received packets that are dropped because of system resource constraints. |
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. |
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. |
Collisions | The best estimate of the total number of collisions on this Ethernet segment. |
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). |
Owner | The network management system that created this entry. |