[ofa-general] can not join due to rate:2.5Gbps < group:10Gbps?

[Hal Rosenstock]

On Fri, 2008-04-04 at 10:14 -0500, Todd Rimmer wrote:
> > From: Hal Rosenstock
> > Sent: Friday, April 04, 2008 11:08 AM
> > To: Brian J. Murrell
> > Cc: general at lists.openfabrics.org
> > Subject: Re: [ofa-general] can not join due to rate:2.5Gbps <
> > group:10Gbps?
> > 
> > On Fri, 2008-04-04 at 11:05 -0400, Brian J. Murrell wrote:
> > > On Fri, 2008-04-04 at 07:55 -0700, Hal Rosenstock wrote:
> > > >
> > > > Looks like you have a mixed rate set of ports so you need to
> configure
> > > > the group to 2.5 Gbps.
> > >
> > > I'm a bit green with I/B, so please bear with me if you can.  I do
> > > understand that there can be mixed rates depending on hardware.  But
> the
> > > "hardware guys" assure me the cards in these machines should be able
> to
> > > do 10Gbps.  Maybe they are wrong.  The card is listing as:
> > >
> > > 06:00.0 InfiniBand: Mellanox Technologies MT23108 InfiniHost (rev
> a1)
> I would not recommend reconfiguring your SM for this situation.
> Instead, you most likely have a bad cable or possibly a bad HCA or
> switch port.  All IB products shipped within the last 6 years support
> 10g, so the fact your system has negotiated to 2.5g indicates a problem
> with the link.
> 
> Bad or poorly connected cables are the typical cause.

Yes, this seems right; I misread this as the DDR/SDR issue. I would
doubt he has any 1x hardware.

-- Hal

> Todd Rimmer
> Chief Architect 
> QLogic System Interconnect Group
> Voice: 610-233-4852     Fax: 610-233-4777
> Todd.Rimmer at QLogic.com  www.QLogic.com
> 
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