Table of Contents
- 1. Network interfaces of before creating bridge interface
- 2. Create bridge interface
- 3. Network interfaces of after creating bridge interface
1 Network interfaces of before creating bridge interface
Network interfaces of before creating bridge interface is the following.
/usr/sbin/ip addr show1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group defaultqlen 1000 link/ether 52:54:00:dd:98:9d brd ff:ff:ff:ff:ff:ff inet 192.168.11.95/24 brd 192.168.11.255 scope global dynamic ens3 valid_lft 43189sec preferred_lft 43189sec inet6 fe80::a7b6:c13f:84b6:ec67/64 scope link valid_lft forever preferred_lft forever inet6 fe80::d7ae:62f6:1d2d:8926/64 scope link tentative dadfailed valid_lft forever preferred_lft forever
2 Create bridge interface
The following script will create bridge interface. Please change NIC_NAME to yours.
#!/bin/shset -eNIC_NAME=ens3NIC_MACADDR=$(/usr/sbin/ip a s ${NIC_NAME} | grep “link/ether” | awk ‘{ print $2 }’)sudo dnf install -y bridge-utilscat <<EOF | sudo tee /etc/sysconfig/network-scripts/ifcfg-${NIC_NAME}TYPE=”Ethernet”NIC_MACADDR=”${NIC_MACADDR}”NAME=”${NIC_NAME}”DEVICE=”${NIC_NAME}”ONBOOT=”yes”BRIDGE=”br0″EOFcat <<EOF | sudo tee /etc/sysconfig/network-scripts/ifcfg-br0TYPE=”Bridge”BOOTPROTO=”dhcp”DEFROUTE=”yes”PEERDNS=”yes”PEERROUTES=”yes”NAME=”br0″DEVICE=”br0″ONBOOT=”yes”EOFsudo systemctl restart network
3 Network interfaces of after creating bridge interface
Network interfaces of after creating bridge interface is the following.
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0 state UP group default qlen 1000 link/ether 52:54:00:dd:98:9d brd ff:ff:ff:ff:ff:ff3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 52:54:00:dd:98:9d brd ff:ff:ff:ff:ff:ff inet 192.168.11.95/24 brd 192.168.11.255 scope global dynamic br0 valid_lft 43194sec preferred_lft 43194sec inet6 fe80::5054:ff:fedd:989d/64 scope link valid_lft forever preferred_lft forever
