IPv6 CARP

OpenBSD-misc did not respond.

A bge0 interface has IPv6 link-local address
fec0::2e0:81ff:fe30:c9e0.
I have given it a site address of
fec0::f:2e0:81ff:fe30:c9e0.

% cat /etc/hostname.bge0
up media 100baseTX mediaopt full-duplex
inet6 fec0::f:2e0:81ff:fe30:c9e0 64

How do I make a CARP interface that proceeds beyond state
INIT?
At the moment, which remains in the INIT state:

% cat /etc/hostname.carp1
inet6 fec0::f:2e0:81ff:fe30:c9e0 64 vhid 2 pass password
carpdev \
bge0

Thank you,
Darrel