[openib-general] Dump and load routes with opensm?

[Hal Rosenstock]

On Thu, 2006-05-04 at 13:26, Greg Johnson wrote:
> On Thu, May 04, 2006 at 01:08:54PM -0400, Hal Rosenstock wrote:
> > On Thu, 2006-05-04 at 12:55, Greg Johnson wrote:
> > > I actually want routes.  
> > 
> > OpenSM calculates the unicast and multicast routes and populates the
> > (unicast and multicast) forwarding tables. 
> > 
> > > I have queried them with ibtraceroute and ibroute, 
> > 
> > ibroute dumps the forwarding tables and ibtracert traces the path from a
> > source to a destination so these are displaying how OpenSM has setup the
> > fabric which is a function of the routing algorithm chosen and the
> > physical topology (which may be dynamic).
> > 
> > > but we need routes for the whole fabric. 
> > 
> > Unicast, multicast, or both ? Just to look at ? There is no way to load
> > these into OpenSM.
> 
> At this point we are only interested in unicast routes.  We would like
> to be able to dump and load the forwarding tables.

You can dump them (via ibroute) just not load them.

> We have a single 288 port switch chassis for our cluster.  We would like to be able to
> load routes for two reasons.  One is to be able to do testing with a
> fixed set of routes.

So the topology is fixed and no links ever fail ?

> The other is that we would like to program our own
> routes into the switches.

Once the fabric is up, what are the requirements ? Do you need SA
queries (e.g. PathRecords) to work ?

> > > BTW, if you call ibtraceroute thousands of times it stops working.
> > 
> > Any more info on how it fails ? What version of diags, the management
> > libraries, and the kernel (including OpenIB svn if that is being used)
> > are you using ?
> 
> I'll have to make it fail again and get back to you.

Thanks.

-- Hal

> 
> Thanks,
> Greg