Re: Joining of multicast groups for DAD and ND

[JINMEI Tatuya / $B?@L@x#:H(B <jinmei@xxxxxxxxxxxxxxxxxxxxx>]

>>>>> On Sun, 27 Jun 2004 10:52:26 +0200, 
>>>>> "Gerrit van Niekerk" <gerritvn@gpvno.co.za> said:

> Any at all i.e. the all-nodes multicast address, the solicited-node multicast 
> address of the tentative address (DAD), the all-routers multicast address on an
> advertising interface and the solicited-node multicast address corresponding to 
> each of the IP addresses assigned to the interface (ND). The question is 
> specifically about the need to join multicast groups in the context of DAD and 
> ND.

So your question is essentially whether a node needs to send an MLD
report message for link-local scope multicast groups.  It is not
directly related to ND (in general) or DAD.

The answer to the "essential" question is yes, except for the
all-nodes multicast address (ff02::1).  The simplest reason is because
RFC2710 requires that.  Interaction with an MLD snooping switch might
provide some background behind this requirement.

You may also want to read RFC2710 and draft-ietf-magma-snoop-11.txt.

					JINMEI, Tatuya
					Communication Platform Lab.
					Corporate R&D Center, Toshiba Corp.
					jinmei@isl.rdc.toshiba.co.jp

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