"input packets with dribble condition detected" ??

[Sanghee Han]

Hi

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??

[crow930us]

input packets with dribble condition detected: Gives the dribble bit error, which indicates that a frame is slightly too long. This frame error counter is incremented just for informational purposes; the router accepts the frame.

Troubleshooting Ethernet: http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1904.html

[Sanghee Han]

Thanks for your help.

I read the linked document.

but don't understand yet.

"input packets with dribble condition detected"

[Description]

Gives the dribble bit error, which indicates that a frame is slightly too long.

could you give me some explanation

=> what is the dribble bit error?

=> "a frame is slightly too long"

that means it's size is longer than what?

received frame?

[marikakis · Accepted solution]

Hello,

http://www.commsplace.com/Knowledge/ITcs/html/tutorials/applications/ethernet_basics.htm

"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".

Kind Regards,

M.

[Sanghee Han]

Thanks for your help.

Now, I know about this error counter.

Thanks very much again.

Kind Regards,

SangHee.

[JOKA80]

So what is need to fix the issue?

[Teamitlead]

Hello,

Does anyone know how to resolve input packets with dribble condition?

I am seeing this on one of my 3850 switch interface. The SW interface (with dribble condition) is connected to UPS WebCardLX, UPS Webcard LX card becomes inaccessible which is fixed by doing the shut and no shut command.