Error disabled, port: Connection timed out

[Dragomir]

I got a device connected to the 2k, and it has an amber light

sh int ethernet 102/1/2 shows ,

Ethernet102/1/2 is down (Error disabled, port: Connection timed out)

admin state is up,

  Hardware: 100/1000 Ethernet, address: 04da.d2bc.a883 (bia 04da.d2bc.a883)

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec

  reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, medium is broadcast

  Port mode is access

  auto-duplex, 1000 Mb/s

  Beacon is turned off

  Auto-Negotiation is turned off

  Input flow-control is off, output flow-control is on

  Auto-mdix is turned off

  Switchport monitor is off

  EtherType is 0x8100

  Last link flapped 5d04h

  Last clearing of "show interface" counters never

  52 interface resets

  30 seconds input rate 0 bits/sec, 0 packets/sec

  30 seconds output rate 0 bits/sec, 0 packets/sec

  Load-Interval #2: 5 minute (300 seconds)

    input rate 0 bps, 0 pps; output rate 0 bps, 0 pps

  RX

    411773295 unicast packets  103 multicast packets  181 broadcast packets

    411773579 input packets  488116193109 bytes

    0 jumbo packets  0 storm suppression packets

    0 runts  0 giants  0 CRC  0 no buffer

    0 input error  0 short frame  0 overrun   0 underrun  0 ignored

    0 watchdog  0 bad etype drop  0 bad proto drop  0 if down drop

    0 input with dribble  0 input discard

    0 Rx pause

  TX

    284031519 unicast packets  3775788 multicast packets  14728131 broadcast packets

    302586950 output packets  139657217713 bytes

    527 jumbo packets

    0 output error  0 collision  0 deferred  0 late collision

    0 lost carrier  0 no carrier  0 babble  0 output discard

    0 Tx pause

sh run int ethernet 102/1/2

!Command: show running-config interface Ethernet102/1/2

!Time: Sat Mar  9 17:11:01 2013

version 6.1(2)

interface Ethernet102/1/2

  switchport access vlan 50

  spanning-tree port type edge

  no shutdown

any idea why? other ports on the same switch as working just fine.

[Leo Laohoo]

Not a Nexus guy, but what do you get when you run the command "sh interface status error"?

[Dragomir]

there is no sh interface status error

there is show interface status err-disabled

sh int status err-disabled

--------------------------------------------------------------------------------

Port         Name               Status             Reason

--------------------------------------------------------------------------------

Eth102/1/2   --                 err-disabled       Error disabled

[Leo Laohoo]

Wow.  That's a very helpful (NOT!) output from the Nexus DE.

Enable the ports again and watch carefully the logs on the parent Nexus switch.

What's the client downstream?  Is it another switch?

[Dragomir]

wow, hat worked. what caused it to err-disable and go offline. why?

[Reza Sharifi]

If the inteface is in error disable mode

sh and no sh the interface

config t

inter e102/1/2

sh

and then

no sh

HTH

[Dragomir]

thanks that worked. what is causing it to go offline and err-disable?

[Leo Laohoo]

what is causing it to go offline and err-disable?

The output to the command 'sh interface status err" didn't give enough details.  The only place to look is the logs.

[Dragomir]

i am not familiar with getting the logs. how? the command you gave me nexus does not recognize

[Reza Sharifi · Accepted solution]

Usually this happens when the interface connect and disconnect several times in a short time frame to a server or another switch.  I have seen this specially happening more with 5ks and 7ks and the only way to bring the interface back up is by doing a sh and no sh.

On the 7ks, when the interface is in error disable, the link light goes amber and also flashes. That is how I know the port is in error disable (when looking at the physical port).

HTH

[Dragomir]

yes i noticed that the link light was amber. but it was not flashing.

thanks that was a quick fix.