After setting up bridge network on network interface enp9s0 , kvm guests had issues with accessing ssh,internet.
Current bridge configuration
bridge name bridge id STP enabled interfaces br0 8000.001c2301fbdc no enp9s0
to allow kvm guests network connectivity with host net.ipv4.ip_forward should be enabled,
add net.ipv4.ip_forward = 1 to /etc/sysctl.conf
kernel.sysrq = 1 vm.swappiness=10 vm.vfs_cache_pressure=50 net.ipv4.ip_forward = 1
To make changes take effect without reboot execute sysctl -p
sysctl -p kernel.sysrq = 1 vm.swappiness = 10 vm.vfs_cache_pressure = 50 net.ipv4.ip_forward = 1
Depending on the whether you are using firewalld or iptables they need to be adjusted.
Itptables
iptables -I FORWARD -i br0 -j ACCEPT iptables -I FORWARD -o br0 -j ACCEPT
firewalld
firewall-cmd --permanent --direct --passthrough ipv4 -I FORWARD -i br0 -j ACCEPT firewall-cmd --permanent --direct --passthrough ipv4 -I FORWARD -o br0 -j ACCEPT firewall-cmd --reload