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Oracle Linux: A NIC Is Repeatedly Up and Down (Doc ID 2024201.1)

Last updated on FEBRUARY 02, 2019

Applies to:

Linux OS - Version Oracle Linux 6.5 and later
Oracle Cloud Infrastructure - Version N/A and later
Information in this document applies to any platform.

Symptoms

A NIC on  Linux server keeps flapping (keep up and down repeatedly). No other NIC related errors are logged, only Link Up and Down events are reported  in /var/log/messages:

May 30 11:42:28 localhost kernel: ixgbe 0000:04:00.0: eth2: NIC Link is Down
May 30 11:42:30 localhost kernel: ixgbe 0000:04:00.0: eth2: NIC Link is Up 10 Gbps, Flow Control: RX/TX
May 30 11:49:46 localhost kernel: ixgbe 0000:04:00.0: eth2: NIC Link is Down
May 30 11:49:47 localhost kernel: ixgbe 0000:04:00.0: eth2: NIC Link is Up 10 Gbps, Flow Control: RX/TX
May 30 11:50:35 localhost kernel: ixgbe 0000:04:00.0: eth2: NIC Link is Down
May 30 11:50:37 localhost kernel: ixgbe 0000:04:00.0: eth2: NIC Link is Up 10 Gbps, Flow Control: RX/TX
May 30 11:56:54 localhost kernel: ixgbe 0000:04:00.0: eth2: NIC Link is Down
May 30 11:56:55 localhost kernel: ixgbe 0000:04:00.0: eth2: NIC Link is Up 10 Gbps, Flow Control: RX/TX


In this example, the driver used is ixgbe, but the issue may occur with any NIC drivers.

Cause

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In this Document
Symptoms
Cause
Solution
References


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