D-Link DGS-3224TGR User Manual

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DGS-3224TGR Gigabit Ethernet Switch User’s Guide 
54 
Port 
Select the port you want port error packet statistics for from the drop-down menu. 
Interval 
Select the desired setting between 2 seconds and 60 seconds or Suspend
Clear 
Clicking this button clears all statistics counters on this window. 
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. 
Drop Packets 
The number of frames that are dropped by this port since the last Switch reboot. 
Excessive 
Deferral 
Counts the number of frames for which the first transmission attempt on a particular 
interface was delayed because the medium was busy. 
CRC Error 
For 10 Mbps ports, the counter records CRC errors (FCS or alignment errors). For 100 
Mbps ports, the counter records the sum of CRC errors and code errors (frames received 
with rxerror signal). 
Late Collision 
Counts the number of times that a collision is detected later than 512 bit-times into the 
transmission of a packet. 
Excessive 
Collision 
The number of frames for which transmission failed due to excessive collisions. 
Single Collision 
The number of successfully transmitted frames for which transmission is inhibited by more 
than one collision. 
Collision 
An estimate of the total number of collisions on this network segment. 
Port Packet Analysis 
 
Figure 6- 32.  Port Packet Analysis window 
The information is described as follows: