Who Me Too'd this topic

Hello everybody! 

Update! A bug has been reported; https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvo93073

We have just started our deployment of IE4010 switches in an industrial environment where we are replacing old 2960S switches.

However just after we had replaced about four switches the OT guys started reporting issues with the connected PLCs. The SCADA system was reporting connection issues and one of the controllers even stalled because of this (they say it is a feature..?). 

The problem seems to be with the controllers connected by 10Mbit Half Duplex. 

Configuration is exactly the same on the new IE4010 switches as the old ones.

We usually static configure 10Mbit Half duplex on these ports as it is recommended from the PLC vendor.

Here is the interface configuration.

interface GigabitEthernet1/0/1
 description PS80_152 CN80
 switchport access vlan 180
 switchport mode access
 speed 10
 duplex half

Interface Input and CRC error counters are increasing on the IE4010 switch. 

This is from one of the IE4010 switches still in production:

GigabitEthernet1/1 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 00bc.60e2.b401 (bia 00bc.60e2.b401)
  Description: PS84_178
  MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec,
     reliability 254/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Half-duplex, 10Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  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 10000 bits/sec, 13 packets/sec
  5 minute output rate 34000 bits/sec, 30 packets/sec
     18178818 packets input, 2035872963 bytes, 0 no buffer
     Received 1144670 broadcasts (1144652 multicasts)
     47268 runts, 0 giants, 0 throttles
     67477 input errors, 18063 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 1144652 multicast, 0 pause input
     0 input packets with dribble condition detected
     35866394 packets output, 5726349001 bytes, 0 underruns
     0 output errors, 30178 collisions, 2 interface resets
     0 unknown protocol drops
     0 babbles, 44909 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

This PLC connected is not doing any serious applications, just controlling a pump.

We have tried turning off PoE on the IE4010 ports and using auto speed and duplex settings.

Haven't found any experiencing the same problems, nothing in the bugtracker on this either...

Anyone with any ideas? We have started a case with our VAR, haven't heard from them yet..