keepalived enters FAULT state upon boot and does not assign VIP

Issue

• keepalived faulted after reboot. Cannot assign requested address.
• keepalived Does not assign both IPv4 and IPv6 addresses at boot. It fails assigning the IPv6 address and removes both VIPs:

Apr 27 09:37:12 localhost Keepalived[1711]: Starting VRRP child process, pid=56858
Apr 27 09:37:12 localhost Keepalived_vrrp[56858]: (vrrp_ipv4) Changing effective priority from 99 to 149
Apr 27 09:37:12 localhost Keepalived_vrrp[56858]: (vrrp_ipv6) Changing effective priority from 99 to 149
Apr 27 09:37:12 localhost Keepalived_vrrp[56858]: (vrrp_ipv4) removing VIPs.
Apr 27 09:37:12 localhost Keepalived_vrrp[56858]: (vrrp_ipv6) removing VIPs.
Apr 27 09:37:12 localhost Keepalived_vrrp[56858]: bind unicast_src 2001:db8::2 failed 99 - Cannot assign requested address
Apr 27 09:37:12 localhost Keepalived_vrrp[56858]: (vrrp_ipv6): entering FAULT state (src address not configured)
Apr 27 09:37:12 localhost Keepalived_vrrp[56858]: (vrrp_ipv6) Entering FAULT STATE
Apr 27 09:37:12 localhost Keepalived_vrrp[56858]: (vrrp_ipv4) Entering FAULT STATE