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Unicycle masters and workers (all Unicycle nodes other than Genesis) , are configured by the Redfish API calls issued by the RC to make DHCP Requests on the edge site's local 'pxe' network's L2 broadcast domain. The Genesis node's MaaS acts as the DHCP server.
Unicycle masters and workers (all Unicycle nodes other than Genesis) are configured then provisioned by the MaaS server running on the Genesis node to PXE boot over the remote site's 'pxe' network.
The Unicycle DHCP/HTTP PXE/PXE process flow is summarized below .(omitting the Redfish API calls):
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| Network name | Subnet size | Needs to be externally routable**? | Function |
|---|---|---|---|
| 'oob' | Any* | No | Provides the connectivity between the Build server and RC and then RC and Rover/Unicycle nodes for Redfish API calls to configure/interogate the servers' BIOS. |
| 'host' | Any* | Yes | Provides the edge site's isolated network for MaaS provisioning (MaaS runs on the genesis node once provisioned). It does not need to be routable to any other network. |
| 'pxe' | /24 fixed in R1 | No | Provides a remote site's L2 local network for MaaS provisioning. |
| 'ksn' | /24 fixed in R1 | No | Provides the connectivity and BGP route exchange for the calico network. |
| 'storage' | /24 fixed in R1 | No | Provides the openstack storage network |
| 'neutron' | /24 fixed in R1 | No | Provides the openstack neutron network |
| 'datapath' | Defined in openstack | No *** | Provides the openstack datapath network for the SR-IOV variant VMs |
| 'vxlan' | /24 fixed in R1 | No**** | Provides the openstack storage network for the OVS-DPDK variant VMs |
Notes:
* The 'oob' network may be split in to multiple subnets if required. Each server except the Build Server (and the RC if built on a VM) requires an iDRAC/iLO address which must be manually pre-provisioned into the server.
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