It's found that on Linux /var/log/message (OEL6, OVS 3.4.5, kernel 4.1.12-124.14.5.el6uek.x86_64), below error occurred:
Nov 26 05:58:30 slce30cn23-nas kernel: [ 168.011236] megaraid_sas 0000:0d:00.0: [ 0] Receiver Error
Nov 26 05:58:30 slce30cn23-nas kernel: [ 168.013740] pcieport 0000:00:03.0: AER: Corrected error received: id=0000
Nov 26 05:58:30 slce30cn23-nas kernel: [ 168.013757] megaraid_sas 0000:0d:00.0: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=0d00(Receiver ID)
Nov 26 05:58:30 slce30cn23-nas kernel: [ 168.014046] megaraid_sas 0000:0d:00.0: device [1000:0079] error status/mask=00000001/00002000
To resolve this, you can try below:
#vi /etc/default/grub #add "pci=nommconf"
GRUB_CMDLINE_LINUX="rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet pci=nommconf"
#grub2-mkconfig -o /boot/grub2/grub.cfg
Then reboot the host.