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Duplex settings

swestrich
Level 1
Level 1

Hi,

what kind of duplex settings do I have to make in order to have no duplex missmatch between sw-100001# fa0/18 and a nother switch with sw-100004# gigabitEthernet 1/0/1. When I do auto/auto I have perfomance probelms that look like duplex missmatch:

 

When I do duplex full the connection is not coming up?

Any Idears?

Best regards

Sascha

 

Loading c2960-lanbasek9-mz.150-2.SE6.bin from 53.92.228.13 (via Vlan317): !.!.!.!.!.!.!.!.!.!.!.!.!.!.!..!.!.!.!.!.!.!.!.!.!.!.!.!.!.!..!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!..!.!.!.!.!.!.!.!.!.!.!..!.!.!.!.!.!.!..!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!..!.!.!.!.!.!.!.!.!.!.!.!.!.!.!..!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!..!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!..!.!.!.!.!.!.!.!.!.!.!.!.!.!.!..!..!.!.!.!.!.!.!.!.!.!.!.!.!...

sw-100004#sh int gigabitEthernet 1/0/1
GigabitEthernet1/0/1 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is c414.3c50.9601 (bia c414.3c50.9601)
  Description: to Sw100001 0/18
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 151/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/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 00:00:00, output 00:00:01, output hang never
  Last clearing of "show interface" counters 03:44:16
  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 731000 bits/sec, 39 packets/sec
  5 minute output rate 33000 bits/sec, 37 packets/sec
     476758 packets input, 1055732145 bytes, 0 no buffer
     Received 53260 broadcasts (48128 multicasts)
     0 runts, 295 giants, 0 throttles
     398372 input errors, 123485 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 48128 multicast, 0 pause input
     0 input packets with dribble condition detected
     478247 packets output, 53981482 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

4 Replies 4

I would set both devices to

speed 100

duplex full

HTH

Richard

thats what I tought, but this is whats happend:

 

Fa0/18    to 10004 0/1       notconnect   trunk        full   auto 10/100BaseTX

 

set speed to 100, moment sent to auto

Fa0/18    to 10004 0/1       notconnect   trunk        full   auto 10/100BaseTX

glen.grant
VIP Alumni
VIP Alumni

    Get a crossover cable and  set both interfaces with "no mdix auto " .