if enabling DHCPv6 server it should bind to ports?

[jahlives]

I may have a stupid question :-) But I assumed that if I enable dhcpv6 server on an interface and the dhcp6 server starts then it should listen on udp ports 547 and 548? I try to setup my box with a Hurrican Elec ipv6 Tunnel. IPv6 works so far on the box but if I want to enable dhcp6 on the LAN interface it seems not to bind to the two ports. According to process list the dhcp6 server is started

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dhcpd   62800   0.0  0.2   51904   35680  -  Ss   10:49      0:00.02 /usr/local/sbin/dhcpd -6 -user dhcpd -group dhcpd -chroot /var/dhcpd -cf /etc/dhcpdv6.conf -pf /var/run/dhcpdv6.pid bridge2 bridge3 bridge1 bridge0
but no bindings to the two ports according to netstat command

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netstat -f inet6 -n | grep '.547\|.548'

is it right that dhcpv6 server should bind to these two ports or not (or at least 547)? So far only ntp and dns are bound to ipv6

Cheers

tobi