On Thu, 2007-03-08 at 17:19, Scott Weitzenkamp (sweitzen) wrote: > Yes, it's limited to IPoIB CM. > > I'm talking about IP multicast not IB multicast, so the hardware MTU > should be transparent.
Doesn't IPoIB CM only support IP unicast ? IP multicast should fall back to using normal IPoIB (UD) rather than CM (RC). -- Hal > I'll reopen bug 418, who shall I assign it to? > > Scott > > > -----Original Message----- > > From: Sean Hefty [mailto:[EMAIL PROTECTED] > > Sent: Thursday, March 08, 2007 2:10 PM > > To: Scott Weitzenkamp (sweitzen); Sean Hefty; Michael S. Tsirkin > > Cc: Pavel Shamis; [EMAIL PROTECTED]; > > [email protected]; Vladimir Sokolovsky > > Subject: RE: [ofa-general] RE: OFED 1.2 beta blocking bugs > > > > >There are also IPoIB CM IP multicast problems, see bug 418. > > > > Bug 418 looks different than bug 400. > > > > From the bug report, it sounds like this error is limited to > > IPoIB CM mode. Is > > this correct? > > > > >If you try to multicast packets > 2KB, you see: > > > > I'm not sure if your hardware supports a max MTU of 2K, but > > in general I thought > > multicast would work up to 4K. Can you verify that the > > device MTU is higher > > than the packet size? > > > > >ib0: failed send event (status=1, wrid=35 vend_err 69) > > > > It looks like this indicates a local length error on the send. > > > > >ib_mthca 0000:08:00.0: modify QP 3->3 returned status 10. > > >ib0: failed to modify QP, ret = -22 > > >ib0: couldn't attach QP to multicast group > > > > This looks like a RTS -> RTS QP transition to set the QKey. > > I'm not sure what > > the ib_mthca status code of 10 is, but that may give us a > > hint at the problem. > > This error and the attach QP to multicast group error may be related. > > > > - Sean > > > _______________________________________________ > general mailing list > [email protected] > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general > > To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
