[ofa-general] ***SPAM*** Re: opensm hang and osmtest report ERR 0130

[Hal Rosenstock]

On Fri, Aug 8, 2008 at 3:48 PM, Yicheng Jia <YJia at tmriusa.com> wrote:
>
>> Not sure what you mean by OpenSM acting properly.
>
> I need to use OpenSM to work with both managed and unmanaged switches. I
> have only a single switch in a single subnet. If it detects that there's
> already a Master SM in the subnet, the OpenSM will elect to be the slave one
> and wouldn't affect the work of the managed switch. Otherwise it will work
> as the Master. Does current version of OpenSM have this functionality?

As I wrote before, the election part works (and the master is the high
priority or if equal priority low GUID SM) but there is more to it
than just this. To go beyond the IBTA recommendation, one needs to go
through all the possible pitfalls of a mix of SM flavors on the same
subnet. It is a little simpler given your subnet configuration but
needs analysis nonetheless.

>> That would be my recommendation:

and it's not just my recommendation; it's the IBTA's which is what is
explained in the document I referenced.

>>either run all OpenSMs or all
>> Cisco/Topspin SMs in your subnet but not a mix of the two.
>
> I think this is for the condition of multiple subnets. It shouldn't be the
> case if there's only a single switch in a single subnet. Correct?

No; I was talking about a single subnet.

-- Hal

>
> Thanks!
> Yicheng
>
>
>
> "Hal Rosenstock" <hal.rosenstock at gmail.com>
>
> 08/08/2008 01:06 PM
>
> To
> "Yicheng Jia" <YJia at tmriusa.com>
> cc
> general at lists.openfabrics.org
> Subject
> Re: opensm hang and osmtest report ERR 0130
>
>
>
>
> Hi Yicheng,
>
> On Fri, Aug 8, 2008 at 12:18 PM, Yicheng Jia <YJia at tmriusa.com> wrote:
>>
>> Hi Hal,
>>
>> I have a question regarding to this issue.
>>
>> If I have both opensm and Cisco managed switch running in the same subnet,
>
> This is inadvisable. There are a set of issues when running SMs of a
> different flavor in the same subnet.
>
>> can opensm automatically detect the Master SM and set itself as the slave
>> SM?
>
> Yes, the SM election process will work properly. It relies on high
> priority and low GUID. So if OpenSM either has low priority or same
> priority and low GUID, it will become standby.
>
>> Or I have to manually disable the SM in the Cisco switch
>
> That would be my recommendation: either run all OpenSMs or all
> Cisco/Topspin SMs in your subnet but not a mix of the two.
>
>> in order for the opensm acts properly?
>
> Not sure what you mean by OpenSM acting properly. Both SMs have
> different policies for a number of things beyond the spec. There is an
> IBTA supplied white paper on management interoperability
> (http://www.infinibandta.org/newsroom/whitepapers/mgtinterop_final_1.pdf)
> which I think is available to non members (by registering).
>
> -- Hal
>
>> Thanks!
>> Yicheng
>>
>>
>>
>> general-request at lists.openfabrics.org
>> Sent by: general-bounces at lists.openfabrics.org
>>
>> 08/08/2008 09:06 AM
>> Please respond to
>> general at lists.openfabrics.org
>>
>> To
>> general at lists.openfabrics.org
>> cc
>> Subject
>> general Digest, Vol 19, Issue 31
>>
>>
>>
>>
>>
>> Today's Topics:
>>
>>   1. Re:  opensm hang and osmtest report ERR 0130 (Hal Rosenstock)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Fri, 8 Aug 2008 08:57:57 -0400
>> From: "Hal Rosenstock" <hal.rosenstock at gmail.com>
>> Subject: Re: [ofa-general] opensm hang and osmtest report ERR 0130
>> To: "Wen Hao Wang" <wangwhao at cn.ibm.com>
>> Cc: general at lists.openfabrics.org
>> Message-ID:
>>
>> <f0e08f230808080557q652756a6he76e5601e6065b0a at mail.gmail.com>
>> Content-Type: text/plain; charset=ISO-8859-1
>>
>> On Fri, Aug 8, 2008 at 3:29 AM, Wen Hao Wang <wangwhao at cn.ibm.com> wrote:
>>>>osmtest uses a non compliant query to get all the paths and likely
>>>>only OpenSM supports this extension.
>>>>
>>>>-- Hal
>>>
>>> OK. I need opensm is set up. The Cisco switch has
>>> TopspinOS-2.6.0/build195
>>> installed. Maybe first I need to find out how to diable embedded SM on
>>> the
>>> switch.
>>
>> Yes, you should not run a mix of different flavor SMs in a subnet so
>> if you want to run OpenSM, you need to disable Cisco/Topspin SM.
>>
>>> By the way, how can I know which standby/slave SMs exist in my
>>> cluster?
>>
>> saquery -s
>> will show all SMs (ports with isSM or isSMDisabled capability
>> For more detail, you can run sminfo on all these.
>>
>> -- Hal
>>
>>> Wen Hao Wang
>>> Email: wangwhao at cn.ibm.com
>>
>>
>>
>>
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