4. Configure network

network_cfg.yaml file describes networks configuration for openstack on hosts. It specifies host network mapping and ip assignment of networks to be installed on hosts. Compass4nfv includes a sample network_cfg.yaml under compass4nfv/deploy/conf/network_cfg.yaml

There are three openstack networks to be installed: external, mgmt and storage. These three networks can be shared on one physical nic or on separate nics (multi-nic). The sample included in compass4nfv uses one nic. For multi-nic configuration, see multi-nic configuration.

4.1. Configure openstack network

**! All interface name in network_cfg.yaml must be identified in dha file by mac address !**

Compass4nfv will install networks on host as described in this configuration. It will look for physical nic on host by mac address from dha file and rename nic to the name with that mac address. Therefore, any network interface name that is not identified by mac address in dha file will not be installed correctly as compass4nfv cannot find the nic.

Configure provider network

provider_net_mappings:
  - name: br-prv
    network: physnet
    interface: eth1
    type: ovs
    role:
      - controller
      - compute

The external nic in dha file must be named eth1 with mac address. If user uses a different interface name in dha file, change eth1 to that name here. Note: User cannot use eth0 for external interface name as install/pxe network is named as such.

Configure openstack mgmt&storage network:

sys_intf_mappings:
  - name: mgmt
    interface: eth1
    vlan_tag: 101
    type: vlan
    role:
      - controller
      - compute
- name: storage
    interface: eth1
    vlan_tag: 102
    type: vlan
    role:
      - controller
      - compute

Change vlan_tag of mgmt and storage to corresponding vlan tag configured on switch.

Note: for virtual deployment, there is no need to modify mgmt&storage network.

If using multi-nic feature, i.e, separate nic for mgmt or storage network, user needs to change name to desired nic name (need to match dha file). Please see multi-nic configuration.

4.2. Assign IP address to networks

ip_settings section specifics ip assignment for openstack networks.

User can use default ip range for mgmt&storage network.

for external networks:

- name: external
   ip_ranges:
   - - "192.168.50.210"
     - "192.168.50.220"
   cidr: "192.168.50.0/24"
   gw: "192.168.50.1"
   role:
     - controller
     - compute

Provide at least number of hosts available ip for external IP range(these ips will be assigned to each host). Provide actual cidr and gateway in cidr and gw fields.

configure public IP for horizon dashboard

public_vip:
 ip: 192.168.50.240
 netmask: "24"
 interface: external

Provide an external ip in ip field. This ip cannot be within the ip range assigned to external network configured in pervious section. It will be used for horizon address.

See section 6.2 (Vitual) and 7.2 (BareMetal) for graphs illustrating network topology.