To display the Port Statistics window, either
- Choose Monitor > Port Statistics.
- Click View Port Statistics from the Dashboard
or from Monitor > Trends.
The Port Statistics window displays the statistics for data sent
(transmitted) and received by the switch ports. The types of statistics
collected and displayed are grouped under these tabs:
To understand the complete state of the ports, use this window
with
- Packet Error gauge on the Dashboard
- Port Utilization graph on the Dashboard
- Trends window
- Port Status window
The tables in this window show statistics collected at each system
refresh (every 60 seconds). To manually refresh the statistics,
click
Refresh on the toolbar.
You can sort the contents in each table column either alphabetically
or numerically by clicking the column heading.
To clear the statistics for a specific port, uncheck the check
box in the Clear column for the specific port, and then click Clear
Counters. To clear the statistics for all the ports on
the selected device, check the check box at the top of the far-left
column, and then click Clear Counters.
To cancel any selections in the Clear column, click Cancel.
Note: Clearing the statistics on one tab clears
the statistics on the other tabs.
The Overview tab provides this information:
- The total number of bytes sent and received on each port.
- The total number of packets sent and received on each port.
- Total number of error packets sent. This includes total collisions,
late collisions, and excessive collisions.
- Total number of error packets received. This includes frame
check sequence (FCS) and alignment errors. Equipment being powered
up or down can cause FCS and alignment errors.
Column |
Explanation |
Port |
The number of the port, including port type (such as Fa
for Fast Ethernet and Gi for Gigabit Ethernet),
the module slot number (0, 1, or 2), and the specific port
number. |
Transmitted bytes |
The total number of bytes sent on each port. |
Total transmitted packets |
The total number of packets sent on each port. This includes
unicast, multicast, and broadcast packets. |
Received bytes |
The total number of bytes received on each port. |
Total received packets |
The total number of packets received on each port. This includes
well-formed unicast, multicast, and broadcast packets. |
Total transmit error packets |
The total number of error packets sent. This includes total
collisions, late collisions, and excessive collisions. |
Total receive error packets
|
The total number of error packets received. This includes
FCS and alignment errors. |
The Transmit Detail tab provides this information:
- Transmitted unicast, multicast, and broadcast packets on each
port
- Detailed statistics of transmitted errors on each port
Column |
Explanation |
Port |
The number of the port, including port type (such as Fa
for Fast Ethernet and Gi for Gigabit Ethernet),
the module slot number (0, 1, or 2), and the specific port
number. |
Unicast packets |
The total number of well-formed unicast packets sent by a
port. It excludes packets sent with errors or with multicast
or broadcast destination addresses. |
Multicast packets |
The total number of well-formed multicast packets sent by
a port. It excludes packets sent with errors or with unicast
or broadcast destination addresses. |
Broadcast packets |
The total number of well-formed broadcast packets sent by
a port. It excludes packets sent with errors or with unicast
or multicast destination addresses. |
Total collision packets |
The total number of packets sent without error after having
1 to 15 collisions. It includes packets of all destination address
types and excludes packets discarded because of insufficient
resources or late collisions. |
Excessive collision packets |
The total number of packets that were not sent after 16 collisions.
It includes packets of all destination address types. |
Late collision packets |
The total number of packets discarded because of late collisions
detected during transmission. It includes all sent packets that
had a collision after the transmission of the packet 64th byte.
The preamble and start frame delimiter (SFD) are not included
in the frame byte count. |
The Receive Detail tab provides this information:
- Received unicast, multicast, and broadcast packets on each port.
- Detailed statistics of receive errors on each port.
Column |
Explanation |
Port |
The number of the port, including port type (such as Fa
for Fast Ethernet and Gi for Gigabit Ethernet),
the module slot number (0, 1, or 2), and the specific port
number. |
Unicast packets |
The total number of well-formed unicast packets received by
a port. It excludes packets received with errors, with multicast
or broadcast destination addresses, or with oversized or undersized
packets. Also excluded are packets discarded or without a destination. |
Multicast packets |
The total number of well-formed multicast packets received
by a port. It excludes packets received with errors, with unicast
or broadcast destination addresses, or with oversized or undersize
packets. Also excluded are packets discarded or without a destination.
|
Broadcast packets |
The total number of well-formed broadcast packets received
by a port. It excludes packets received with errors, with unicast
or multicast destination addresses, or with oversized or undersize
packets. Also excluded are packets discarded or without a destination. |
FCS error packets |
The total number of packets received with FCS errors. It excludes
undersized packets with FCS errors. |
Alignment errors packets |
The total number of packets received with alignment errors.
It includes all the packets received with both an FCS error
and a nonintegral number of bytes. |
Oversize packets |
The total number of packets received of more than 1518 bytes
that had both good and bad FCS values. |
Undersize packets |
The total number of packets received that were smaller than
64 octets long and were otherwise well-formed. |
Collision fragments
|
The total number of frames smaller than 64 bytes that have
an integral number of bytes and bad FCS values. |
|