On Thu, 29 May 2008 12:27:12 -0700 Hal Rosenstock <[EMAIL PROTECTED]> wrote:
> Ira, > > In osm_sa_mcmember_record.c:__search_mgrp_by_mgid, there is: > > #define PREFIX_MASK (0xff12601b00000000ULL) > > Shouldn't all scopes be consolidated so this should be: > > #define PREFIX_MASK (0xff10601b00000000ULL) > > or was this intentional for some reason ? > It seemed reasonable for this to consolidate link-local only because according to my IPv6 book, solicited node multicast is the particular range, ff02::1:ff00:0/104 However, I am a bit confused about how the scope bits map from the IP address to the MGID. The MGID refers only to the IB-subnet scope _not_ IP, therefore what I said above might not matter because we are now talking about the IB scope. But that begs the question: Can a node issue an SNM request to a node in another IB subnet? (I think the answer is yes if the IP subnet spans more than one IB subnet) In that case, the SNM address would be in the range ff02::1:ff00:0/104 but what MGID would that map onto in IB? I think the current mapping results in an IB link-local scope. So would a router have to forward it even though the IB scope is link-local? Now my head hurts... :-( Ira _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
