IPv6 ipi jobs failing: No route to registry virthost.ostest.test.metalkube.org:5000

Seems to have started just over 10 hours ago

Error is early in dev-scripts,
+(./02_configure_host.sh:243): main(): sudo podman login --authfile /root/private-mirror-ostest.json -u ocp-user -p ocp-pass virthost.ostest.test.metalkube.org:5000
Error: authenticating creds for "virthost.ostest.test.metalkube.org:5000": pinging container registry virthost.ostest.test.metalkube.org:5000: Get "https://virthost.ostest.test.metalkube.org:5000/v2/": dial tcp [fd2e:6f44:5dd8:c956::1]:5000: connect: no route to host

Current thinking is that it is related to the handling of legacy network-scripts