Bridge - not working

[oSAlj]

Hi,
system CentOS 8

config for br0 and enp1s0

# cat ifcfg-br0

Code: Select all

DEVICE="br0"
TYPE="Bridge"
BOOTPROTO="static"
DELAY="0"
STP="off"
ONBOOT="yes"
IPADDR="192.168.0.5"
NETMASK="255.255.255.0"
GATEWAY="192.168.0.1"
DEFROUTE="yes"
NM_CONTROLLED="no"
IPV6INIT="no"
DNS1="8.8.8.8"

# cat ifcfg-enp1s0

Code: Select all

DEVICE="enp1s0"
TYPE="Ethernet"
ONBOOT="yes"
BRIDGE="br0"

After restarting the system, the bridge does not work.

Picture of the command ip a


The longer I try to configure CentOS 8, the more it seems to me that this system is not suitable for a server.
I think I will choose CentOS 7 or Debian 10 as the host system.

[jlehtone]

Bridge definitely works in CentOS 8: viewtopic.php?f=56&t=72441

NM_CONTROLLED="no"

A default CentOS 8 installation does not have any ifup*-scripts in /etc/sysconfig/network-scripts.
Either they are elsewhere, have to be installed, or you should use NetworkManager.

[vamfoom]

I have the same problem with bridging. I used the nmcli command-line tool to configure it according to the examples/tutorials. Try this and see if this works for you: https://www.linuxtechi.com/install-conf ... ment-16928

I'm still trying to figure out why it doens't work. I've configured bridges from centos 5 through 7. They changed it in CentOS 8 to use NetworkManager. I'm still struggling to get this to work.

[oSAlj]

I am using NetworkManager

[jlehtone]

I am using NetworkManager

NetworkManager does not add NM_CONTROLLED="no" into config. Did you use anaconda, cockpit, NM gnome applet, nmtui, or nmcli to create the bridge config?

[vamfoom]

I got it to work eventually. See this post: viewtopic.php?f=56&t=72441&p=305008#p305008

[oSAlj]

I reinstalled the system and the bridge works as it should