Table 140: Port Detailed Statistics Fields (continued)
Field
Description
Excessive Collision Frames
A count of frames for which transmission on a particular interface fails due to
excessive collisions.
Underrun Errors
The total number of frames discarded because the transmit FIFO buffer became
empty during frame transmission.
GMRP Failed Registrations
The number of times attempted GMRP registrations could not be completed.
GVRP Failed Registrations
The number of times attempted GVRP registrations could not be completed.
Percent Utilization Transmitted
(%)
The amount of link utilization, represented as a percentage of total link
bandwidth, for the TX direction.
Advanced - Receive
Total Packets Received Not
Forwarded
The number of inbound packets which were chosen to be discarded to prevent
them from being delivered to a higher-layer protocol, even though no errors had
been detected. One possible reason for discarding such a packet is to free up
buffer space.
Total Packets Received With
MAC Errors
The total number of inbound packets that contained errors preventing them
from being delivered to a higher-layer protocol.
Overruns
The total number of frames discarded as this port was overloaded with incoming
packets, and could not keep up with the inflow.
Alignment Errors
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 a bad
Frame Check Sequence (FCS) with a non-integral number of octets.
Jabbers Received
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). Note that this
definition of jabber is different than the definition in IEEE-802.3 section 8.2.1.5
(10BASE5) and section 10.3.1.4 (10BASE2). These documents define jabber as the
condition where any packet exceeds 20 ms. The allowed range to detect jabber
is between 20 ms and 150 ms.
Fragments Received
The total number of packets received that were less than 64 octets in length with
ERROR CRC (excluding framing bits but including FCS octets).
Undersize Received
The total number of packets received that were less than 64 octets in length with
GOOD CRC (excluding framing bits but including FCS octets).
Unacceptable Frame Type
The number of frames discarded from this interface due to being a frame type
that the interface cannot accept.
Percent Utilization Received
(%)
The amount of link utilization, represented as a percentage of total link
bandwidth, for the RX direction.
Time Since Counters Last
Cleared
The amount of time in days, hours, minutes, and seconds, that has passed since
the statistics for this interface were last reset.
•
Click
Clear Counters
to clear all the counters. This resets all statistics for this port to the default
values.
•
Click
Clear All Counters
to clear all the counters for all ports on the switch. The button resets all
statistics for all ports to default values.
•
Click
Refresh
to refresh the data on the screen and display the most current statistics.
Configuring System Information
ExtremeSwitching 200 Series: Administration Guide
153