Alcatel Unleashed

hi all,
appreciate anybody to xplain the meaningful of 'InError' counter, what cause it to increase? Thanks

CUSTOMER#sh int 1/6/1 statistics
Octets 667514510 In/OutPkts 64 117
Collisions 0 In/OutPkts 65-127 652277789
Broadcast 29958 In/OutPkts 128-255 87214417
Multicast 54049 In/OutPkts 256-511 34151725
CRCAlignErrors 0 In/OutPkts 512-1023 50933339
Undersize 0 In/OutPkts 1024-MaxFrameSize 294819471
Oversize 6331585 TotalInPkts 626268867
Fragments 0 TotalIn/OutPkts 1119396858
Jabbers 0 Down Count 1
DropEvents 0
Last5secInPkts 161749 Last5secInBps 11423604
Last1minInPkts 1936321 Last1minInBps 10974294
Last5minInPkts 9693277 Last5minInBps 11027671
Last5secOutPkts 184957 Last5secOutBps 27733503
Last1minOutPkts 2191097 Last1minOutBps 27127185
Last5minOutPkts 10771812 Last5minOutBps 26912318

CUSTOMER#sh int 1/6/1 statistics extended
InOctets 787305949 OutOctets 4061409213
InUcastPkts 626537149 OutUcastPkts 572813200
InNUcastPkts 84051 OutNUcastPkts 2805920
InDiscards 0 OutDiscards N/A
InErrors 6336123 OutErrors N/A
InUnknownProtos N/A

CUSTOMER#sh int 1/6/1 statistics extended
InOctets 829413198 OutOctets 4164000102
InUcastPkts 626661285 OutUcastPkts 572951443
InNUcastPkts 84070 OutNUcastPkts 2806551
InDiscards 0 OutDiscards N/A
InErrors 6337846 OutErrors N/A
InUnknownProtos N/A
UPEALREDTONE01#