5.3. Recommended Practices for Configuring Host Networks
If your network environment is complex, you may need to configure a host network manually before adding the host to the Red Hat Virtualization Manager.
Red Hat recommends the following practices for configuring a host network:
-
Configure the network with Cockpit. Alternatively, you can use
nmtuiornmcli. - If a network is not required for a self-hosted engine deployment or for adding a host to the Manager, configure the network in the Administration Portal after adding the host to the Manager. See Creating a New Logical Network in a Data Center or Cluster.
Use the following naming conventions:
-
VLAN devices:
VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD -
VLAN interfaces:
physical_device.VLAN_ID(for example,eth0.23,eth1.128,enp3s0.50) -
Bond interfaces:
bondnumber(for example,bond0,bond1) -
VLANs on bond interfaces:
bondnumber.VLAN_ID(for example,bond0.50,bond1.128)
-
VLAN devices:
- Use network bonding. Networking teaming is not supported in Red Hat Virtualization and will cause errors if the host is used to deploy a self-hosted engine or added to the Manager.
Use recommended bonding modes:
-
If the
ovirtmgmtnetwork is not used by virtual machines, the network may use any supported bonding mode. -
If the
ovirtmgmtnetwork is used by virtual machines, see Which bonding modes work when used with a bridge that virtual machine guests or containers connect to?. -
The
active-backupbonding mode is preferred. See Bonding Modes for details.
-
If the
Configure a VLAN on a physical NIC as in the following example (although
nmcliis used, you can use any tool):# nmcli connection add type vlan con-name vlan50 ifname eth0.50 dev eth0 id 50 # nmcli con mod vlan50 +ipv4.dns 8.8.8.8 +ipv4.addresses 123.123.0.1/24 +ivp4.gateway 123.123.0.254
Configure a VLAN on a bond as in the following example (although
nmcliis used, you can use any tool):# nmcli connection add type bond con-name bond0 ifname bond0 bond.options "mode=active-backup,miimon=100" ipv4.method disabled ipv6.method ignore # nmcli connection add type ethernet con-name eth0 ifname eth0 master bond0 slave-type bond # nmcli connection add type ethernet con-name eth1 ifname eth1 master bond0 slave-type bond # nmcli connection add type vlan con-name vlan50 ifname bond0.50 dev bond0 id 50 # nmcli con mod vlan50 +ipv4.dns 8.8.8.8 +ipv4.addresses 123.123.0.1/24 +ivp4.gateway 123.123.0.254
-
Do not disable
firewalld. - Customize the firewall rules in the Administration Portal after adding the host to the Manager. See Configuring Host Firewall Rules.
