Is it correct to assume that, when one is configuring openmpi v1.3.2 and if one leaves out the
--with-openib=/dir from the ./configure command line, that InfiniBand support will NOT be built into openmpi v1.3.2? Then, if an Ethernet network is present that connects all the nodes, openmpi will use that network? Also, is it required to add --enable-static to the ./configure command line to make sure Infiniband support is available? If I do not then the ompi_info --config command yields Wrapper extra LIBS: -ldl -Wl,--export-dynamic -lnsl -lutil -lm -ldl Note the absence of -lrdmacm and -libverbs which, I am told, are essential for Infiniband support. Whereas if --enable-static IS included, the ompi_info --config command yields Wrapper extra LIBS: -lrdmacm -libverbs -ldl -Wl,--export-dynamic -lnsl -lutil -lm -ldl And -lrdmacm and -libverbs are now present. Thanks for your help. Jim