Many “runts” are being detect on Ethernet interface ?

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Question:

Many “runts” are being detect on Ethernet interface ?

Answer:

It could be duplex mismatching issue.
First of call, Runts: These are frames smaller than 64 bytes with a bad FCS value.
When operating at full-duplex, FCS, cyclic redundancy checks (CRC), alignment errors, and runt counters should be minimal. If the link is operating at full-duplex, the collision counter is not active. If the FCS, CRC, alignment, or runt counters are incrementing, check for a duplex mismatch. Duplex mismatch is a situation in which the switch is operating at full-duplex and the connected device is operating at half-duplex, or the other way around. The result of a duplex mismatch is extremely slow performance, intermittent connectivity, and loss of connection.

I hope this help for you.
^.^