Describe the issue: When OCS is installed in external mode on OpenStack Platform we should recommend that either the OCP nodes have a vnic connected to a neutron provider network, so that storage traffic doesn't need to go through neutron l3 gateways. OCP nodes could either have a single nic, connected to a provider network (vlan), or alternatively OCP nodes could have 1 vnic connected to a tenant network (typically using vxlan) and another vnic connected to a provider network (vlan). Document URL: https://access.redhat.com/documentation/en-us/red_hat_openshift_container_storage/4.6/html/deploying_and_managing_openshift_container_storage_using_red_hat_openstack_platform/deploying-openshift-container-storage-on-red-hat-openstack-platform-in-external-mode_external-osp#creating-an-openshift-container-storage-cluster-service-for-external-storage_external-osp Chapter/Section Number and Title: I think this requirement/suggestion would fit well in section 2.2 Product Version: OCS 4.6