ipv6 forwarding without netfilter

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Hi,
According to this link:
http://www.faqs.org/docs/Linux-HOWTO/Linux+IPv6-HOWTO.html#FIREWALLING-NETFILTER6

"In IPv6 you can't control forwarding per device, forwarding control
has to be done using IPv6-netfilter (controlled with ip6tables)
rulesets and specify input and output devices (see
Firewalling/Netfilter6  for more). This is different to IPv4, where
you are able to control forwarding per device (decision is made on
interface where packet came in). "


My question is:
Suppose you don't want to control forwarding in IPv6 on a certain
device, just forward packets which are received on any device.
I am not sure that this howto is relevant.
Is it true that in order to achieve IPV6 forwarding you must use
netfilter rule ?

Is it possible to achieve forwarding simply by running:
echo "1" /proc/sys/net/ipv6/conf/all/forwarding

without setting any ip6tables netfilter rule ?


rgs,
Mark
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