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"input packets with dribble condition detected" ??

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??

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Accepted Solutions

Re: "input packets with dribble condition detected" ??

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.

4 REPLIES
Bronze

Re: "input packets with dribble condition detected" ??

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

New Member

Re: "input packets with dribble condition detected" ??

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?

Re: "input packets with dribble condition detected" ??

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.

New Member

Re: "input packets with dribble condition detected" ??

Thanks for your help.

Now, I know about this error counter.

Thanks very much again.

Kind Regards,

SangHee.

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