On Mon, Aug 17, 2009 at 9:02 AM, Michael Di Domenico <[email protected] > wrote:
> Yes, I have a group of machines with 8131 and MT23108 cards. > Supposedly, based on the AMD errata i need to turn the cards MTU down > from 2048 to below 1500 Then you need to use 1024 or smaller (512 or 256). > > > No i'm not running OpenSM, And that SM doesn't support cranking the PR MTU down for Tavor communication ? > i'd prefer to do this at the machine level > if possible rather then the fabric level. I think the MTUCap of the .ini file would need to be changed in order to get the SM to negotiate the link MTU (NeighborMTU) smaller. MTUCap 3 is 1024. -- Hal > > > On Mon, Aug 17, 2009 at 9:00 AM, Hal Rosenstock<[email protected]> > wrote: > > > > > > On Mon, Aug 17, 2009 at 8:52 AM, Michael Di Domenico > > <[email protected]> wrote: > >> > >> Yes, for the IB card itself, not IPoIB > > > > > > The MTUCap of the card can affect the NeighborMTU which in turn can > > affect IPoIB MTU (for UD mode). > > > > -- Hal > > > >> > >> On Mon, Aug 17, 2009 at 8:48 AM, Dotan Barak<[email protected]> wrote: > >> > Hi. > >> > > >> > Which MTU do you try to change? > >> > (of the IB link?) > >> > > >> > Dotan > >> > > >> > On Mon, Aug 17, 2009 at 3:16 PM, Michael Di > >> > Domenico<[email protected]> wrote: > >> >> How do I change the MTU of an MT23108 card? I have an AMD 8131 > >> >> chipset server that needs this turned down below 1500, or atleast > >> >> that's what's suspected. > >> >> _______________________________________________ > >> >> 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 > > > > >
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