[openib-general] IPoIB question

[Hal Rosenstock]

On Tue, 2005-09-27 at 04:11, Abhijit Gadgil wrote:
> Hi All,
> 
> I am new to IPoIB. I have a query, as per the IPoIB Architecture
> document, whenever an IPoIB interface is brought up, it needs to do a
> Full Member Join to the "broadcast" Multicast group. Where exactly in
> the code, is this taking place? I have been able to trace a little bit -
> eg. in ipoib_add_port() there is a call to ipoib_intf_alloc() which in
> turn creates a Work Queue for the ipoib_mcast_restart_task(). In this
> task, subsequently there is _ipoib_mcast_join() and so on where it
> finally reaches ipoib_mcast_attach() (in ipoib_verbs.c). What is not
> clear at this point is, Why is it looking for cached PKey?

It needs the PKey as this is part of the MGID to join (for the broadcasy
group and other multicast groups).

>  Is it not
> something that needs to be sent by the SM? 

Yes.

> Further, I am putting SM in testability 'debug' mode (DEBUG=10 in
> /etc/opensm.conf), however I am still not seeing any dump of messages
> about FullMember join whenever I try restarting the IB interfaces. What
> should be log-level to put SM to dump those messages? 

Already answered by Eitan.

-- Hal