[Users] HP BLc QLogic 4X QDR IB Switch oddness

[Hal Rosenstock]

Hi Andrei,

On Fri, May 24, 2013 at 8:51 AM, Andrei Mikhailovsky <andrei at arhont.com>wrote:

> Hello guys,
>
> I was wondering if anyone on the mailing list has experienced an odd
> behaviour with HP BLc QLogic 4X QDR IB Switch (505958-B21)? I've tried to
> get HP to solve this issue, but it resulted to HP basically saying that
> they do not have Infiniband specialists who could help me.
>
> My problem is that every time I reboot the blade servers which are
> connected to the above blade switch the switch ports take ages to Activate.
> The time it takes when the servers have:
>
> State: Active
> Physical state: LinkUp
>
> is random and varies from several minutes to over 10 hours. I couldn't
> find a correlation or any consistency between the servers or switch ports.
> The same server could connect within minutes after a reboot, but could take
> hours following the next reboot.
>
> However, the server which are connected to the same switch with a cable
> (not interconnected blade servers) do not have this issue and get port
> state Active in seconds every time.
>
What is the physical state of these ports when they're not active (on both
the switch and server side) ? Are they LinkUp or something else ?


>
> I have installed the latest available firmware and I have tried chaging
> blade mezz cards, IB switch and the blade enclosure, different versions of
> OFED / opensm. It stays the same.
>
> Has anyone come across this kind of behaviour?
>

Have you tried reseating your (server) cards ?

Also, would you comment on the topology ? How large a subnet is this ?

-- Hal


>
> Thanks
>
> Andrei
>
>
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