[ofa-general] Re: [PATCH] opensm: update Release Notes for OpenSM version 3.2

[Sasha Khapyorsky]

Hi Hal,

On 07:38 Sun 12 Oct     , Hal Rosenstock wrote:
> 
> > +  When this mode is used (enabled with --consolidate_ipv6_snm_req option)
> > +  OpenSM will map all IPv6 Solicited Node Multicast address join requests
> > +  into a single Multicast group with address ff10:601b::1:ff00:0. In this
> > +  way limited MLID space is saved. The feature is very useful with large
> > +  (~> 1024 nodes) clusters.
> 
> Isn't there truth in adversing ? This should also say:
> 
> This IBA noncompliant feature may be problematic in heterogeneous
> subnets (due to rate and MTU differences).

The potential problem in heterogeneous subnets is not much different
from IPv4 - 1x ports will not be able to join. Is it the case you meant?

If yes, IPv6 SNM becomes much less critical issue comparing to not
working IPv4.

Sasha