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what causes "giants" on an interface and how can it be addressed

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Last Modified: 2011-09-20
notice the "giants" on this interface.  as you can see, i reset the counters on this interface yesterday.  how can i troubleshoot this?

FastEthernet0/1 is up, line protocol is up
  Hardware is Fast Ethernet, address is 000a.8a1d.5101 (bia 000a.8a1d.5101)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s
  input flow-control is off, output flow-control is off
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, output hang never
  Last clearing of "show interface" counters 23:19:26
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue :0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 432000 bits/sec, 16 packets/sec
     68199031 packets input, 263024928 bytes, 0 no buffer
     Received 309 broadcasts, 0 runts, 20261 giants, 0 throttles
     20261 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     41235316 packets output, 2871746036 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out
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