[CentOS] CentOS7 sometimes don't detect NIC after reboot

Tue Sep 17 14:31:40 UTC 2019
Miroslav Geisselreiter <mg at intar.cz>

Dne 17.9.2019 v 16:14 Ralf Prengel napsal(a):
> Am 17.09.2019 um 13:05 schrieb Miroslav Geisselreiter:
>> I have brand new PC with this components:
>> CPU Intel® Pentium G5400, LGA1151
>> motherboard ASUS PRIME B360M-C
>> 16 GB RAM
>> HDD 2x ADATA SSD 256GB XPG GAMMIX S11, PCIe Gen3x4 M.2 2280 (RAID1)
>> NIC Intel X550-T1 Ethernet Converged Network Adapter
>> I installed CentOS 7 and two NICs were detected:
>> eno1 (on motherboard)
>> enp1s0 (Intel X550-T1)
>> When I restart the machine sometimes enp1s0 is missing. It is not 
>> detected during boot. It looks like NIC card is not installed / not 
>> present. After next reboot everything is fine and I do not see any 
>> problems with NIC card.
>> How can I avoid this problem with missing NIC? Can you help me, please?
> Hallo,
> perhaps a timing problem until the nic is up or a bios bug.
> Ralf
Thank you, Ralf. I will check if there is a new bios. If it is timing 
problem, can I do anything to solve this?


       If lspci*always*  show card, check the kernel module.

modinfo ixgbe
filename:       /lib/modules/3.10.0-957.27.2.el7.x86_64/kernel/drivers/net/ethernet/intel/ixgbe/ixgbe.ko.xz
version:        5.1.0-k-rh7.6
license:        GPL
description:    Intel(R) 10 Gigabit PCI Express Network Driver
author:         Intel Corporation, <linux.nics at intel.com>
retpoline:      Y
rhelversion:    7.6
srcversion:     8A6178275DDA252CA16D17C
alias:          pci:v00008086d000015E5sv*sd*bc*sc*i*
alias:          pci:v00008086d000015E4sv*sd*bc*sc*i*
alias:          pci:v00008086d000015CEsv*sd*bc*sc*i*
alias:          pci:v00008086d000015C8sv*sd*bc*sc*i*
alias:          pci:v00008086d000015C7sv*sd*bc*sc*i*
alias:          pci:v00008086d000015C6sv*sd*bc*sc*i*
alias:          pci:v00008086d000015C4sv*sd*bc*sc*i*
alias:          pci:v00008086d000015C3sv*sd*bc*sc*i*
alias:          pci:v00008086d000015C2sv*sd*bc*sc*i*
alias:          pci:v00008086d000015AEsv*sd*bc*sc*i*
alias:          pci:v00008086d000015ACsv*sd*bc*sc*i*
alias:          pci:v00008086d000015ADsv*sd*bc*sc*i*
alias:          pci:v00008086d000015ABsv*sd*bc*sc*i*
alias:          pci:v00008086d000015B0sv*sd*bc*sc*i*
alias:          pci:v00008086d000015AAsv*sd*bc*sc*i*
alias:          pci:v00008086d000015D1sv*sd*bc*sc*i*
alias:          pci:v00008086d00001563sv*sd*bc*sc*i*
alias:          pci:v00008086d00001560sv*sd*bc*sc*i*
alias:          pci:v00008086d0000154Asv*sd*bc*sc*i*
alias:          pci:v00008086d00001557sv*sd*bc*sc*i*
alias:          pci:v00008086d00001558sv*sd*bc*sc*i*
alias:          pci:v00008086d0000154Fsv*sd*bc*sc*i*
alias:          pci:v00008086d0000154Dsv*sd*bc*sc*i*
alias:          pci:v00008086d00001528sv*sd*bc*sc*i*
alias:          pci:v00008086d000010F8sv*sd*bc*sc*i*
alias:          pci:v00008086d0000151Csv*sd*bc*sc*i*
alias:          pci:v00008086d00001529sv*sd*bc*sc*i*
alias:          pci:v00008086d0000152Asv*sd*bc*sc*i*
alias:          pci:v00008086d000010F9sv*sd*bc*sc*i*
alias:          pci:v00008086d00001514sv*sd*bc*sc*i*
alias:          pci:v00008086d00001507sv*sd*bc*sc*i*
alias:          pci:v00008086d000010FBsv*sd*bc*sc*i*
alias:          pci:v00008086d00001517sv*sd*bc*sc*i*
alias:          pci:v00008086d000010FCsv*sd*bc*sc*i*
alias:          pci:v00008086d000010F7sv*sd*bc*sc*i*
alias:          pci:v00008086d00001508sv*sd*bc*sc*i*
alias:          pci:v00008086d000010DBsv*sd*bc*sc*i*
alias:          pci:v00008086d000010F4sv*sd*bc*sc*i*
alias:          pci:v00008086d000010E1sv*sd*bc*sc*i*
alias:          pci:v00008086d000010F1sv*sd*bc*sc*i*
alias:          pci:v00008086d000010ECsv*sd*bc*sc*i*
alias:          pci:v00008086d000010DDsv*sd*bc*sc*i*
alias:          pci:v00008086d0000150Bsv*sd*bc*sc*i*
alias:          pci:v00008086d000010C8sv*sd*bc*sc*i*
alias:          pci:v00008086d000010C7sv*sd*bc*sc*i*
alias:          pci:v00008086d000010C6sv*sd*bc*sc*i*
alias:          pci:v00008086d000010B6sv*sd*bc*sc*i*
depends:        mdio,ptp,dca
intree:         Y
vermagic:       3.10.0-957.27.2.el7.x86_64 SMP mod_unload modversions
signer:         CentOS Linux kernel signing key
sig_key:        52:0A:4E:2D:9D:55:3E:F8:42:01:C1:88:B8:7F:E5:1B:9D:E1:1A:5E
sig_hashalgo:   sha256
parm:           max_vfs:Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63 (uint)
parm:           allow_unsupported_sfp:Allow unsupported and untested SFP+ modules on 82599-based adapters (uint)
parm:           debug:Debug level (0=none,...,16=all) (int)

Mauricio, what else shloud I check with kernel module?