[openib-general] opensm problem

[Hal Rosenstock]

Steve,
 
See <hnr>...</hnr> embedded comments below.
 
-- Hal

________________________________

From: Steve Wise [mailto:swise at opengridcomputing.com]
Sent: Thu 11/16/2006 4:51 PM
To: Hal Rosenstock
Cc: openib-general at openib.org
Subject: RE: [openib-general] opensm problem



On Thu, 2006-11-16 at 23:37 +0200, Hal Rosenstock wrote:
> Steve,
> 
> Did you configure the kernel differently ? Is IGMP turned on somehow ?
> (I haven't run with Sean's multicast code.)

IGMP turned on where? 
|
<hnr> Not sure what turns this on. I think IP multicast needs to be configured in the kernel. I don't think it is automatic although that might be the default config. Also, using IP multicast (via Sean's multicast code) likely causes IGMP to be used so the routers know the IPmc groups being created/joined/left. </hnr>
 
> BTW, as I mentioned, this can be solved on the client side equally as
> well as the SM side.

How?

<hnr> The client side can do a full join with all the SA required characteristics (called components in IB). There are downsides to both approaches: configuration (SM side) versus first joiner node characteristics are the ones enforced for the group which may not be the desired result. </hnr>