N3k 3132 QSFP+ port in linkFlapErrDisabled state

[nathalye]

Hi,

We have a Nexus 3132 switch with 32x40G supervisor module. I connected Port 9 with a breakout cable ( breaking out into 4 10G links on the other end of it) to UCS rack server with Cisco VIC card 1225 10G interface. The port is initially came up and then shortly moved to linkFlapErrDisabled.

=======================

Eth1/9/1      1       eth  trunk  down    linkFlapErrDisabled         10G(D) --

=======================

Did some more digging but still no clue why it moves to this state. Here is the interface config:

================

interface Ethernet1/9/1

  speed 10000

  description link to L3 out host orion2-esx9

  switchport mode trunk

  switchport trunk allowed vlan 300,400

  no shutdown

==============

The remaining 3 ports 1/9/2, 1/9/3 and 1/9/4 are not connected anywhere. Err-disabled status shows:

orion2-n3k1# show interface status err-disabled

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

Port         Name               Status   Reason

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

Eth1/9/1     link to L3 out hos linkFlap linkFlapErrDisabled

orion2-n3k1#

I tried shut/no shut on this interface but doesnt help. Any ideas why the port is flapping?

Here is the hardware information from 'show run' output:

hardware profile portmode 32x40G

hardware profile front portmode qsfp

Any help is appreciated

[nathalye]

'term mon' shows the following:

=========================

orion2-n3k1# terminal monitor

2015 Dec  2 14:29:29 orion2-n3k1 %ETHPORT-5-SPEED: Interface Ethernet1/9/1, operational speed changed to 10 Gbps

2015 Dec  2 14:29:29 orion2-n3k1 %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/9/1, operational duplex mode changed to Full

2015 Dec  2 14:29:29 orion2-n3k1 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/9/1, operational Receive Flow Control state changed to off

orion2-n3k1# 2015 Dec  2 14:29:29 orion2-n3k1 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/9/1, operational Transmit Flow Control state changed to off

2015 Dec  2 14:29:29 orion2-n3k1 %ETHPORT-5-IF_UP: Interface Ethernet1/9/1 is up in mode trunk

2015 Dec  2 14:29:30 orion2-n3k1 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/9/1 is down (Link failure)

2015 Dec  2 14:29:31 orion2-n3k1 last message repeated 1 time

2015 Dec  2 14:29:31 orion2-n3k1 %ETHPORT-5-SPEED: Interface Ethernet1/9/1, operational speed changed to 10 Gbps

2015 Dec  2 14:29:31 orion2-n3k1 %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/9/1, operational duplex mode changed to Full

2015 Dec  2 14:29:31 orion2-n3k1 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/9/1, operational Receive Flow Control state changed to off

2015 Dec  2 14:29:31 orion2-n3k1 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/9/1, operational Transmit Flow Control state changed to off

2015 Dec  2 14:29:31 orion2-n3k1 %ETHPORT-5-IF_UP: Interface Ethernet1/9/1 is up in mode trunk

2015 Dec  2 14:29:32 orion2-n3k1 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/9/1 is down (Link failure)

2015 Dec  2 14:29:33 orion2-n3k1 last message repeated 1 time

2015 Dec  2 14:29:33 orion2-n3k1 %ETHPORT-5-SPEED: Interface Ethernet1/9/1, operational speed changed to 10 Gbps

2015 Dec  2 14:29:33 orion2-n3k1 %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/9/1, operational duplex mode changed to Full

2015 Dec  2 14:29:33 orion2-n3k1 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/9/1, operational Receive Flow Control state changed to off

2015 Dec  2 14:29:33 orion2-n3k1 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/9/1, operational Transmit Flow Control state changed to off

2015 Dec  2 14:29:33 orion2-n3k1 %ETHPORT-5-IF_UP: Interface Ethernet1/9/1 is up in mode trunk

2015 Dec  2 14:29:34 orion2-n3k1 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/9/1 is down (Link failure)

2015 Dec  2 14:29:35 orion2-n3k1 last message repeated 1 time

2015 Dec  2 14:29:35 orion2-n3k1 %ETHPORT-5-SPEED: Interface Ethernet1/9/1, operational speed changed to 10 Gbps

2015 Dec  2 14:29:35 orion2-n3k1 %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/9/1, operational duplex mode changed to Full

2015 Dec  2 14:29:35 orion2-n3k1 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/9/1, operational Receive Flow Control state changed to off

2015 Dec  2 14:29:35 orion2-n3k1 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/9/1, operational Transmit Flow Control state changed to off

2015 Dec  2 14:29:35 orion2-n3k1 %ETHPORT-5-IF_UP: Interface Ethernet1/9/1 is up in mode trunk

2015 Dec  2 14:29:36 orion2-n3k1 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/9/1 is down (Link failure)

2015 Dec  2 14:29:36 orion2-n3k1 last message repeated 1 time

2015 Dec  2 14:29:36 orion2-n3k1 %ETHPORT-5-IF_DOWN_ERROR_DISABLED: Interface Ethernet1/9/1 is down (Error disabled. Reason:Too many link flaps)

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Not sure why operational Tx and Rx Flow Control is turned off and there is link failure.