Difference between revisions of "CentOS 8.x Creating bridge interfaces (br0) for virtual hosts to use shared interface"

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These should be removed from ifcfg-&lt;interface-name&gt; file to avoid duplication.
These should be removed from ifcfg-&lt;interface-name&gt; file to avoid duplication.


For changes to take effect restart NetworkManager service using:
<pre>
systemctl stop NetworkManager
systemctl start NetworkManager
</pre>
Validate that bridge is having ip address and not interface:
<pre>
nmcli connection show
nmcli connection show <ethernet-interface> | grep br0
</pre>
Should show
<pre>
connection.master: br0
</pre>




Line 44: Line 60:
'''Older information on this can be found at:'''
'''Older information on this can be found at:'''
*[[Creating bridge interfaces (br0) for virtual hosts to use shared interface]]
*[[Creating bridge interfaces (br0) for virtual hosts to use shared interface]]
Refer:
* https://computingforgeeks.com/how-to-create-a-linux-network-bridge-on-rhel-centos-8/




<yambe:breadcrumb self="Creating bridge interfaces (br0) for virtual hosts to use shared interface">CentOS 8.x Network configuration|Network configuration</yambe:breadcrumb>
<yambe:breadcrumb self="Creating bridge interfaces (br0) for virtual hosts to use shared interface">CentOS 8.x Network configuration|Network configuration</yambe:breadcrumb>

Revision as of 02:29, 9 January 2021

<yambe:breadcrumb self="Creating bridge interfaces (br0) for virtual hosts to use shared interface">CentOS 8.x Network configuration|Network configuration</yambe:breadcrumb>

CentOS 8.x Creating bridge interfaces (br0) for virtual hosts to use shared interface

To create bridge interfaces in CentOS 8.0 (or even 7.0) almost same settings as described in older Creating bridge interfaces (br0) for virtual hosts to use shared interface, with an additional 'NAME=' parameter in both interface configuration files. Example configuration files for CentOS 8.0 bridge are:

In /etc/sysconfig/network-scripts/ifcfg-br0 

   NAME="br0"
   DEVICE="br0"
   TYPE="Bridge"
   BOOTPROTO="dhcp"
   ONBOOT="yes"

In /etc/sysconfig/network-scripts/ifcfg-<interface-name> 

   NAME="<interface-name>"
   DEVICE="<interface-name>"
   TYPE="Ethernet"
   BOOTPROTO="none"
   ONBOOT="yes"
   BRIDGE="br0"

where <interface-name> can be eth0, enp0s1, eno1, etc.


If you want to specify additional settings such as for IPV6 they should all go in ifcfg-br0 file only. Example settings that can go to ifcfg-br0 are: 

DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy

These should be removed from ifcfg-<interface-name> file to avoid duplication.


For changes to take effect restart NetworkManager service using: 

systemctl stop NetworkManager
systemctl start NetworkManager

Validate that bridge is having ip address and not interface: 

nmcli connection show
nmcli connection show <ethernet-interface> | grep br0

Should show 

connection.master: br0



Older information on this can be found at:


Refer:


<yambe:breadcrumb self="Creating bridge interfaces (br0) for virtual hosts to use shared interface">CentOS 8.x Network configuration|Network configuration</yambe:breadcrumb>

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