[Users] interpreting ibdiagnet output

[Rupert Dance]

You should look here for a list of cables and devices that have been tested
for compliance and interoperability. This will help you if you need to
replace any of the cables. Also don't forget to check and do firmware
upgrades as needed - this is often the easiest way to resolve problems.

http://www.infinibandta.org/content/pages.php?pg=integrators_list_overview


Rupert Dance
Co-Chair IBTA CIWG
Software Forge 
2 Greenleaf Woods Drive #301
Portsmouth, NH 03801
Phone: 603-319-8486
www.soft-forge.com



-----Original Message-----
From: users-bounces at lists.openfabrics.org
[mailto:users-bounces at lists.openfabrics.org] On Behalf Of Ira Weiny
Sent: Monday, September 17, 2012 4:03 PM
To: Narayan Desai
Cc: users at lists.openfabrics.org
Subject: Re: [Users] interpreting ibdiagnet output

On Mon, 17 Sep 2012 12:48:18 -0500
Narayan Desai <narayan.desai at gmail.com> wrote:

> Is there a canonical place that describes the errors reflected in 
> ibdiagnet output, and potential resolutions? I'm trying to fix up a 
> qdr fabric, and am seeing a combination of:
>  - symbol errors (these are pretty clear; i'm assuming that cable 
> replacement is the solution in a lot of these cases)

Fix these first.

>  - ipoib speed errors (the group is at 10 gbit, but the network is 
> capable of 40; is this a cosmetic error, or will it cause actual 
> performance problems?)

This is likely to be due to the above errors causing some ports to be slower
(10gbit) and they joined/created the mcast group first.  Thus the whole
group is slower than capable.

I think these will clean up once you fix the errors above.

Not sure how ibdiagnet reports these errors but to check for slow ports you
could do the following:

iblinkinfo -l | grep -i could

All ports which "could be" faster (either link width or speed) will be
listed.

Ira

>  - pages of multicast errors (not really sure what to do here)
>  - nagging issues with arping (which i suspect might have to do with 
> the previous multicast errors)
> 
> Various vendor docs describe how to run ibdiagnet, but don't do any 
> more than reproduce some output. I'm happy to RTFM, but a fair big of 
> googling has not revealed with FM to R. ;)  -nld 
> _______________________________________________
> Users mailing list
> Users at lists.openfabrics.org
> http://lists.openfabrics.org/cgi-bin/mailman/listinfo/users


--
Ira Weiny
Member of Technical Staff
Lawrence Livermore National Lab
925-423-8008
weiny2 at llnl.gov
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