Nortel 15000 参考指南

show ethernet errors

308689-B Rev 00

47

 

The

command displays receive, transmit, and system 

errors for all Ethernet circuits or for a specific circuit or slot. This command 
allows for the following command filter (flag) and filter argument:

The output includes the following information:

 

<slot>

Displays information about the specified slot only.

Slot/Conn 

Slot location of the Ethernet module within the chassis 
and the connector number.

Checksum Errors

Number of frames received with a CRC error.

Alignment Errors

Number of frames received that did not contain an 
integral number of octets. Normally a frame alignment 
error also causes a checksum error on the frame.

Overflow Errors

Number of overflow errors received on this line in which 
the device FIFO buffer overflowed before obtaining the 
next DMA cycle.

Frames Too Long

Number of frames received that exceed the MTU size.

Symbol Errors

Number of errors in hardware MLT3 encoding. This 
indicates a problem and is relevant only for 100 Mb/s 
lines.

Internal MAC Errors

Number of frames containing fewer than 64 octets (

runt 

packets).

Late Collision

Number of transmitter out-of-window collisions while 
receiving the next packet. This usually indicates wiring or 
other hardware problems.

Slot/Conn 

Slot location of the Ethernet module within the chassis 
and the connector number.

Frames Too Long

Number of frames transmitted that exceed the MTU size.

Underflow Errors

Number of frames in which the transmitter was unable to 
obtain an entire packet from memory fast enough to keep 
up with the interface.