***SPAM*** Re: [ofw] Expose a vendor defined device in ibbus?

[Deepak Gupta]

All,

I came across one more question in my mind which are I think is not clear to
me after reading the whole thread.

In new design being discussed:-
Are we making sure that we can have more than one child devices configured
for the same IOC.
Currently, there is one child device created per IOC discovered.

Having more than one child device configured for same IOC is a requirement
if a user wants two different ULP interfaces to be created on host side.
Consider a case in which a host is connected to a single IOC and IOC is
connected to a ethernet network via switch.
If there are two different IP subnets then there is a requirement of two
different Ethernet interfaces on the host side too.

Please let me know if you need more clarification of my question.

Regards
Deepak

On Sat, Dec 20, 2008 at 2:19 PM, Deepak Gupta <deepak.gupta at qlogic.com>wrote:

> Please see below.
>
> Regards
> Deepak
>
> On Sat, Dec 20, 2008 at 12:42 AM, Fab Tillier <
> ftillier at windows.microsoft.com> wrote:
>
>> > On Wed, Dec 17, 2008 at 11:43 PM, Fab Tillier
>> > <ftillier at windows.microsoft.com> wrote:
>> >> Are there other properties that I have missed that are needed?
>> >
>> > We need a way in which devices created should be configured for
>> > failovers ( ULPs like VNIC, SRP need more configurable failovers).
>> > Looking at IBAL's code it create the devices based on the reachable
>> > IOC's and thus failover's are possible across the HCA/ports and not
>> > across two different IOCs.
>> > Users can have a case in which two different IOCs connected to same
>> > physical network/storage (redundancy is provided for high availability)
>> > and want a failover across the IOCs.
>>
>> This would be done via LBFO for network devices, and MPIO for storage
>> devices.  I think having the bus driver report a single IOC that really maps
>> to two IOCs on the fabric is asking for management problems.  Further,
>> LBFO/MPIO can provide failover between different device types, so the
>> failover devices don't have to be identical HW.
>
>
> I don't know about how MPIO works. But for LBFO,  BundleID param will have
> to be included in extended params then so that user gets the freedom of
> bundling  different failover configurations.
>
>
>>
>>
>> -Fab
>>
>
>
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