User`s guide

Using the STS16-20 Chassis View
2-16 Viewing Chassis Information
The following three informational Þelds appear in the upper portion of the
window:
Description
The interface description for the currently selected interface.
Address
The MAC (physical) address of the selected interface.
Type
The interface type of the selected port.
The lower portion of the window provides the following transmit and receive
statistics. The Þrst four statistics are also displayed in pie charts.
Unicast
The number of packets transmitted to or received from this interface that had a
single, unique destination address. These statistics are displayed in the pie chart,
color-coded green.
Non-Unicast
The number of packets transmitted to or received from this interface that had a
destination address that is recognized by more than one device on the network
segment. The multicast Þeld includes a count of broadcast packetsÑthose that are
recognized by all devices on a segment. These statistics are displayed in the pie
chart, color-coded dark blue.
Discarded
The number of packets which were discarded even though they contained no
errors that would prevent transmission. These statistics are displayed in the pie
chart, color-coded magenta.
Good packets are typically discarded to free up buffer space when the network
becomes very busy. If this occurs routinely, it usually indicates that network trafÞc
is overwhelming the device. To solve this problem, you may need to reconÞgure
your bridging parameters, or perhaps reconÞgure your network to add additional
bridges or switches. Refer to the Network Troubleshooting Guide for details.
Error
The number of packets received or transmitted that contained errors. These
statistics are displayed in the pie chart, color-coded red.
Unknown Protocol (Received Packets only)
The number of packets received which were discarded because they were created
under an unknown or unsupported protocol.
Packets Received (Received Packets only)
The number of packets received by the selected interface.