[openib-general] LID assignment policy of opensm

[Devesh Sharma]

thanks for replying this surely solces my problem
Thanks Once again to both of you.
Devesh

On 3/1/06, Eitan Zahavi <eitan at mellanox.co.il> wrote:
>
> Hi Devesh
>
> If a user writes the file such that it is legal (see below) OpenSM will
> use it.
> When a STANDBY SM gets mastership it has two choices:
> a. Use the LIDs from the fabric
> b. Enforce the assignments provided by the guid2lid file
> The option
>
> Legal means:
> 1. there are no LID conflicts
> 2. lid range start is aligned with 2^(LMC)
> NOTE that the end of the range can extend beyond start + 2^(LMC) - 1
>
> /var/cache/osm/opensm.opts:
> # If true honor the guid2lid file when coming out of standby
> # state, if such file exists and is valid
> honor_guid2lid_file FALSE
>
> Eitan
> Devesh Sharma wrote:
> > On 28 Feb 2006 13:36:27 -0500, Hal Rosenstock <halr at voltaire.com> wrote:
> >
> >>Hi Devesh,
> >>
> >>On Tue, 2006-02-28 at 11:12, Devesh Sharma wrote:
> >>
> >>>Hi Hal Thanks for replying.
> >>>This setisfies my needs if user can define his own guid to lid
> >>>mapping.
> >>>whether in this file user can define his own guid to lid mapping?
> >>
> >>To my knowledge it's not used that way in general but that could work if
> >>consistent with the OpenSM LID policy (e.g. LMC, etc.).
> >
> >
> >
> > consistent with the OpenSM LID policy means what? Is it that, That each
> GUID
> > sholud have unique LID range?
> >
> >
> > The format of the file is as follows:
> >
> >>0x0008f10403960985 0x0007 0x0007
> >>
> >>0x0008f10400410015 0x0003 0x0003
> >>
> >>(e.g GUID, min LID, max LID so the above is for LMC 0 which is the
> >>default).
> >>
> >>-- Hal
> >>
> >>
> >>>Devesh
> >>>
> >>>On 28 Feb 2006 07:19:35 -0500, Hal Rosenstock <halr at voltaire.com>
> >>>wrote:
> >>>        Hi Devesh,
> >>>
> >>>        On Tue, 2006-02-28 at 01:44, Devesh Sharma wrote:
> >>>        > Hi list,
> >>>        > Please anybody brife me about the LID assignment policy used
> >>>        by opensm
> >>>        > subnet manager. Can user specify fixed LID mappings using a
> >>>        file?
> >>>
> >>>        There is a file it creates with these in it so they can be
> >>>        reused
> >>>        subsequently. It is /var/cache/osm/guid2lid.
> >>>
> >>>        opensm -h has the following option:
> >>>        -c
> >>>        --cache-options
> >>>                  Cache the given command line options into the file
> >>>                  /var/cache/osm/opensm.opts for use next invocation
> >>>                  The cache directory can be changed by the
> >>>        environment
> >>>                  variable OSM_CACHE_DIR
> >>>
> >>>        Is that suitable for your needs ?
> >>>
> >>>        -- Hal
> >>>        >
> >>>        >
> >>>
> >>______________________________________________________________________
> >>
> >>>        >
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> >>>
> >>>
> >>
> >>
> >
> >
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