Recent customer updates from 10-10z4 have not noticed/followed the special NFV update information in the NFV Configuration Guide: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/10/html/network_functions_virtualization_configuration_guide/ch-upgrade To help alleviate this, the content will be integrated into the Upgrade Guide.
Content republished, with corrections to the NFV post-update steps: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/10/html-single/upgrading_red_hat_openstack_platform/#sect-Post_Update-NFV_Configuration
Reopening since the appendix is misleading (mentions ovs 2.5 - ovs 2.6 and it should be for all ovs updates).
Content republished : https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/10/html-single/upgrading_red_hat_openstack_platform/#ap-rhosp10-ovs-2-6-update-post-install