In a shared Ethernet environment, runt frames are almost always caused by
collisions. If the collision rate is high, refer to the problem "Excessive
collisions" below.
If runt frames occur when collisions are not high or in a switched Ethernet
environment, then they are the result of underruns or bad software on a
network interface card.
Use a protocol analyzer to try to determine the source address of the runt
frames.
"Late Collisions"
Step 1 Use the show interfaces ethernet command to check the rate of
collisions. The total number of collisions with respect to the total number
of output packets should be around 0.1 percent or less.
Step 2 Use a TDR1 to find any unterminated Ethernet cables.
Step 3 Look for a jabbering transceiver attached to a host. (This might
require host-by-host inspection or the use of a protocol analyzer.)
Hope this helps you!
"net explorer" wrote in message
<[EMAIL PROTECTED]>...
>Thank you, I appreciate your help but I already knew that runt are
>smaller packets than the normal size.
>
>The fact is that I don't know why we observe runts frames and what are
>they due to?
>
>For information we use PoS (PPP) over the OC-12 link
>
>Sylvain B (CCNA)
>
>
>>runts are packets that are smaller than the minimun a packet can be.
>In
>>ethernet a runt
>>is a paket smaller than 64 bytes.
>>\
>>atm cell size is maximun and minimum pakcet size is 53
>>
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