On Fri, 30 May 2008 05:50:24 -0700 Hal Rosenstock <[EMAIL PROTECTED]> wrote:
> Ira, > > The IPv6 SNM consolidation option in OpenSM currently collapses the SNM > groups down to 1 group aliased group. However, in a heterogeneous > network, not all ports will be able to meet certain group parameters > (MTU, rate). This has been discussed on the list before. My current read > of the code indicates that these joins would be rejected. Is that > right ? Yes I beleive so. > > If so, my question is why not allow them to create and join with > their original real multicast group for this case ? That would be fine as long as there were not too many "odd" nodes. > > The downside would > be that if there were a lot of ports like this, then the consolidation > would reduce the number of groups but maybe not enough. So would we then > want an additional option for doing this (and what the default should > be) ? I think it would be best to consolidate all the "like" ports. For example if you had 3 different MTU's on the fabric then you would have 3 different MGID's and groups. The main reason I did not do this was because it would have been a much larger change to the code and I did not want to risk breaking things. > > One cut on the default would be to keep it the same as now but > does that really matter ? Ideally, those additional SNM groups would be > collapsed too. I think that aspect was dealt with in Jason's approach to > this in a thread entitled "IPv6 and IPoIB scalability issue": > http://lists.openfabrics.org/pipermail/general/2006-November/029621.html > in which he proposed an MGID range for collapsing IPv6 SNM groups. Ah yes... I guess I should have read this part before responding above! ;-) > > Also, have you tried IPv6 SNM consolidation with multiple partitions ? I > may have more on this aspect later. > No, as we don't really use partitions. 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
