Re: [IPv6 Users] Multicast Loopback on DAD

YOSHIFUJI Hideaki / 吉藤英明 <[email protected]> Fri, 27 Oct 2006 11:53:00 +0900 (JST)
Newsgroups gmane.network.ipv6.general,gmane.linux.ipv6.usagi.users
Organization USAGI/WIDE Project
Message-ID <[email protected]>
In article <[email protected]> (at Fri, 27 Oct 2006 11:26:15 +0900), Suresh <[email protected]> says:

> But, again the same issue. Has Linux not implemented "LOOPBACK
> SUPPRESSION"? If the Neighbour Solicitation is just looped-back, will
> the DAD will fail? How the NS is differentiated between the loop-back and
> the NS from other node?

On Linux, if DAD ever looped-back, the DAD will fail.
Note that we assume the multicast will not loop-back in device driver level,
and we disable loop-back for ND messages (incl. DAD) in IP-layer level,
NS for DAD will not loop-back on Linux.

--yoshfuji
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