Red Hat SummitChapter 4. Network Considerations
The undercloud host requires at least the following networks:
- Provisioning network - Provides DHCP and PXE boot functions to help discover bare-metal systems for use in the overcloud.
- External network - A separate network for remote connectivity to all nodes. The interface connecting to this network requires a routable IP address, either defined statically, or dynamically through an external DHCP service.
The minimal overcloud network configuration includes:
- Single NIC configuration - One NIC for the Provisioning network on the native VLAN and tagged VLANs that use subnets for the different overcloud network types.
- Dual NIC configuration - One NIC for the Provisioning network and the other NIC for the External network.
- Dual NIC configuration - One NIC for the Provisioning network on the native VLAN and the other NIC for tagged VLANs that use subnets for the different overcloud network types.
- Multiple NIC configuration - Each NIC uses a subnet for a different overcloud network type.
For more information on the networking requirements, see Networking Requirements.
