Using IPv6 VIP alias for services may affect CARP IPv6 VIP work
During investigation of customer request found IPv6 VIP alias for services may affect CARP IPv6 VIP work. CARP IPv6 VIPs may stops their work until device reboot.
For some unknown reason CARP IPv6 VIP stops working even in L2 segments in case IPv6 alias which was bound with service. It produces error during ping Can't assign requested address E.g. some alias was IPsec interface. In that case the alias still works tunnel established and keep-alive work, traffic forwarded via tunnel, but CARP IPv6 VIPs stop their work. Just changing service address does not help, device needs reboot.
May be related https://redmine.pfsense.org/issues/8566