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

[Hal Rosenstock]

On Thu, 2006-05-04 at 12:55, Greg Johnson wrote:
> On Thu, May 04, 2006 at 12:39:38PM -0400, Hal Rosenstock wrote:
> > Hi Greg,
> > 
> > On Thu, 2006-05-04 at 12:34, Greg Johnson wrote:
> > > Is there currently a way to dump and load routes with opensm?  If not,
> > > how would I go about writing one?
> > 
> > Is it really routes or stable LIDs you want ?
> 
> 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.

> 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 ?

> Maybe a problem in the MAD driver?

Not sure as I haven't seen this.

-- Hal

> > LIDs are stored in /var/cache/osm/guid2lid and restored from there when
> > OpenSM is started assuming the reassign LIDs option (-r or
> > --reassign_lids) is not used when invoking OpenSM.
> 
> Thanks, that's good to know.
> 
> Greg