D-Link DGS-3312SR, Product Manual

Page: 189 / 244

DGS-3312SR Gigabit Layer 3 Switch
Figure 8- 13. Rx Error Analysis (table) window
Select the desired Switch using the Unit drop-down menu and the desired port using the Port drop-down menu. The Time
Interval
field sets the interval at which the error statistics are updated.
The following fields can be set or are displayed:
Parameter Description
Unit
Allows you to specify a Switch in a Switch stack using that Switch’s Unit ID. 15
indicates a Switch in standalone mode.
Port Allows you to specify a port to monitor
−
from the Switch selected above.
Clear Clicking this button clears all statistics counters on this window.
View Table Clicking this button instructs the Switch to display a table rather than a line graph.
View Line Chart Clicking this button instructs the Switch to display a line graph rather than a table.
CrcError Counts otherwise valid frames that did not end on a byte (octet) boundary.
UnderSize The number of frames detected that are less than the minimum permitted frame size
of 64 bytes and have a good CRC. Undersize frames usually indicate collision
fragments, a normal network occurrence.
OverSize Counts packets received that were longer than 1518 octets, or if a VLAN frame 1522
octets, and less than the MAX_PKT_LEN. Internally, MAX_PKT_LEN is equal to
1522.
Fragment
The number of packets less than 64 bytes with either bad framing or an invalid CRC.
These are normally the result of collisions.
Jabber The number of frames with lengths more than the MAX_PKT_LEN bytes. Internally,
MAX PKT LEN is equal to 1522
176