Oracle Linux: Interface MII Status Shows as Down When Using "updelay" with non-zero Value "link status up for interface enox, enabling it in 500 ms " (Doc ID 2671932.1)

Last updated on MAY 12, 2021

Applies to:

Symptoms

Kernel: kernel-3.10.0-693.el7

MII status shows as down for one of the HW interfaces.

cat /proc/net/bonding/bond0

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

Bonding Mode: fault-tolerance (active-backup)

Primary Slave: eno1 (primary_reselect always)
Currently Active Slave: eno1
MII Status: up
MII Polling Interval (ms): 100 
Up Delay (ms): 500 <<<<<=====
Down Delay (ms): 200

Slave Interface: eno1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: xy.yz...
Slave queue ID: 0

Slave Interface: eno3
MII Status: down <<<<<<===== Status shows as down
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: xy.yz...
Slave queue ID: 0

These errors can be seen in /var/log/messages.

May 17 07:14:47 <HOSTNAME> kernel: [ 1652.018328] bondx: link status up for interface eno3, enabling it in 500 ms
May 17 07:14:47 <HOSTNAME> kernel: [ 1652.118322] bondx: link status up for interface eno3, enabling it in 500 ms
May 17 07:14:47 <HOSTNAME> kernel: [ 1652.218309] bondx: link status up for interface eno3, enabling it in 500 ms
May 17 07:14:47 <HOSTNAME> kernel: [ 1652.318304] bondx: link status up for interface eno3, enabling it in 500 ms
May 17 07:14:47 <HOSTNAME> kernel: [ 1652.418293] bondx: link status up for interface eno3, enabling it in 500 ms
May 17 07:14:47 <HOSTNAME> kernel: [ 1652.518277] bondx: link status up for interface eno3, enabling it in 500 ms

Cause

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