If there are both flat and vlan provider networks associated to the same network/provider bridge (e.g., datacentre:br-ex), the proxy_arp and the ndp is not configured for the br-ex bridge which breaks the connectivity for IPs on the flat provider network
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (RHOSP 17.1.4 bug fix and enhancement advisory), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2024:9974