Network issue : FCS errors

[Kociszev]

Hello all !

I encounter an issue on one of my TRU64 servers.

There is a slow data transfer rate between the tu0 interface with the rest of my network.

# netstat -is 

tu0 Ethernet counters at Mon Aug 18 12:36:29 2014

          597288 seconds since last zeroed
      3247692782 bytes received
      1247440141 bytes sent
        47230625 data blocks received
         1276867 data blocks sent
      3190099068 multicast bytes received
        46494595 multicast blocks received
         2323078 multicast bytes sent
           19830 multicast blocks sent
               0 blocks sent, initially deferred
               0 blocks sent, single collision
               0 blocks sent, multiple collisions
              15 send failures, reasons include:
            1400 receive failures, reasons include:
                      1400 frame check sequence errors

# hwmgr -get attr -cat network | more
36:
  name = tu0
  category = network
  sub_category = Ethernet
  model = 21143
  hardware_rev = 4.1
  firmware_rev =

  MTU_size = 1500
  media_speed = 100
  media_selection = Set by SRM Console
  media_type = Unshielded Twisted Pair (UTP)
  loopback_mode = 0
  promiscuous_mode = 0
  full_duplex = 1

  interface_number = 1
  link =
  registration_time = Mon Aug 11 14:40:39 2014
  user_name = (null) (settable)
  location = (null) (settable)
  software_module = (null)
  state = available
  state_previous = unknown
  state_change_time = none
  event_count = 0
  last_event_time = none
  access_state = online
  access_state_change_time = none
  capabilities = 0
  indicted = 0
  indicted_probability = (null)
  indicted_urgency = (null)
  disabled = 0

These actions have been done :

- Check the link with the directly connected swith : OK

- Swap the pport on the swich : done, same problem

- Change the MTU value from 1500 to 1458

- Change the network card : done, same problem

- Change the cable between the server and the switch : done, same problem.

Have you any other suggestions about the cause of this issue ?