I do'nt know exact meaning of the
"input packets with dribble condition detected" in the output of show int fa1/0
also can't find the relative information about this error counter in cisco.com
what is the exact meaning??
"The InterPacket Gap (IPG) is the fixed time gap between Ethernet Frames."..."the maximum 802.3 frame size is 1518 bytes"..."A frame that is defined as a 'dribble' is one that is greater than 1518 bytes but can still be processed. This could point to a problem where the IPG is too small or non-existent such that two frames join together."
In ethernet controller/tranceiver specifications, dribble error is said to mean that "packet did not end on a byteboundary" or "non-integer number of bytes in packet". Now, the ethernet controller I looked up (http://www.bitsavers.org/pdf/3Com/Etherbox_Sep83.pdf) has receive buffers to put packets received from wire. Each receive buffer has a header part with information about the frame received (besides the actual contents of the frame received). One of the bits of the receive buffer header says whether a dribble error occured for the frame, hence the term "dribble bit error".