[Users] does opensm support directed torus topology?

[Rupert Dance - SFI]

You might also find it useful to review Volume 1 of the IBTA Spec especially the overview chapter. It is publicly available here:

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

-----Original Message-----
From: Users <users-bounces at lists.openfabrics.org> On Behalf Of Peter Kjellström
Sent: Thursday, June 07, 2018 10:01 AM
To: John Evan <evajohn.777 at gmail.com>
Cc: users at lists.openfabrics.org
Subject: Re: [Users] does opensm support directed torus topology?

On Thu, 7 Jun 2018 17:31:11 +0530
John Evan <evajohn.777 at gmail.com> wrote:

> yes, all the hosts don't have direct connection with all the other 
> hosts.
> 
> Then assuming that the CA's have switch functions (forwarding the
> packets) in them , whether opensm can support the topology?

The SM sets up a subnet which has a topology. In your example there are multiple subnets (of the trivial point to point topology). IB does not support forwarding tables in CA.

What remains would be either IB routing on the hosts (routing packets globally between several subnets) or a special type of host adapter that also implemented a switch internally.

I'm not aware of the existence of either of those...

/Peter
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