On Wed, 21 Aug 2002, Dave Thaler wrote:
> > Besides,
> > as Pekka pointed out, none of the nodes on the link will have joined
> > the subnet-local multicast group, so the traffic actually won't reach
> > any of them.
>
> Eh? It will reach all of them,
^^^^^^^^^^^^^^^^^
> and will be received by the IPv6 layer
> as long as it has joined the group. If it hasn't joined the group, then
> it's not supposed to be received by that node. That's why it's called
> multicast, not broadcast.
Please compare this to your message a few days back (and remember the
context of all-nodes -multicast addresses):
>> So, while you indicate that a link-local address may not be able to
>> reach all nodes on a subnet, isn't it also true that a subnet-local
>> address may not be able to reach all of the nodes on a link?
[...]
> The answer is yes it will (so the answer to your
> question is: no, not true).
If all nodes in the subnet have not joined the subnet-local multicast
group, all nodes in the subnet will not be reachable through it.
There's some bad miscommunication here.
Therefore if you specify "all-nodes-in-subnet" multicast address, it is
completely useless for that purpose unless you create some very dirty
hacks.
--
Pekka Savola "Tell me of difficulties surmounted,
Netcore Oy not those you stumble over and fall"
Systems. Networks. Security. -- Robert Jordan: A Crown of Swords
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