Ethernet port slow to be up

Issues related to configuring your network
Post Reply
filovitch
Posts: 1
Joined: 2020/06/24 05:05:12

Ethernet port slow to be up

Post by filovitch » 2020/06/24 05:17:08

Hi,

I have proceeded to a new installation of Centos 8 on a ThinkPad M720q. I was thinking the boot was quite slow for this hardware. When I checked the dmesg I seen that the ethernet card took 12 seconds to be up. I comparaison, this same card, on the same hardware, take 5 seconds to be up on a debian 10.4 (see dmesg log in attachment).

Anyone have a idea where is the problem?

Centos:

Code: Select all

[    2.486567] e1000e 0000:00:1f.6 eno1: renamed from eth0
[    6.178365] IPv6: ADDRCONF(NETDEV_UP): eno1: link is not ready
[    6.360210] IPv6: ADDRCONF(NETDEV_UP): eno1: link is not ready
[    6.364497] IPv6: ADDRCONF(NETDEV_UP): eno1: link is not ready
[   12.736632] e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[   12.736711] IPv6: ADDRCONF(NETDEV_CHANGE): eno1: link becomes ready
Debian:

Code: Select all

[    1.773458] e1000e 0000:00:1f.6 eno1: renamed from eth0
[    2.878061] IPv6: ADDRCONF(NETDEV_UP): eno1: link is not ready
[    5.684948] e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[    5.685057] IPv6: ADDRCONF(NETDEV_CHANGE): eno1: link becomes ready
Centos complete dmesg: https://pastebin.com/XJjBUSSa
debian complete dmesg: https://pastebin.com/7iW3qQ1w

aks
Posts: 2999
Joined: 2014/09/20 11:22:14

Re: Ethernet port slow to be up

Post by aks » 2020/06/26 22:43:04

I'd start here:
" If the kernel is appropriately configured, lockdown may be lifted by typing the appropriate sequence on a directly attached physical keyboard. For x86 machines, this is SysRq+x."
(it's from the man page mentioned).
https://en.wikipedia.org/wiki/Magic_SysRq_key

Post Reply

Return to “CentOS 8 - Networking Support”