Dear all, On our cluster, we have some nodes with infiniband which I am trying to set up at the moment. After some time of struggeling, I finally understand: 1) The hardware is found:     #lspci | grep fini     04:00.0 InfiniBand: QLogic Corp. IBA7322 QDR InfiniBand HCA (rev 02) 2) The kernel-modules(?) seem to be loaded:     #lsmod | grep ib_     ib_ipoib              122880  0     ib_cm                  53248  2 rdma_cm,ib_ipoib     ib_uverbs              90112  1 rdma_ucm     ib_umad                28672  0     ib_core               217088  7 rdma_cm,ib_ipoib,iw_cm,ib_umad,rdma_ucm,ib_uverbs,ib_cm     ipv6                  405504  59 rdma_cm,ib_ipoib,ib_core    #lsmod | grep verbs    ib_uverbs              90112  1 rdma_ucm    ib_core               217088  7 rdma_cm,ib_ipoib,iw_cm,ib_umad,rdma_ucm,ib_uverbs,ib_cm 3) but 'ibv_devices' gives an empty list, as well as ibstat etc.     maybe helpful:    #ibnodes    ibwarn: [3220] mad_rpc_open_port: can't open UMAD port ((null):0)    src/ibnetdisc.c:784; can't open MAD port ((null):0)    /usr/sbin/ibnetdiscover: iberror: failed: discover failed    ibwarn: [3225] mad_rpc_open_port: can't open UMAD port ((null):0)    src/ibnetdisc.c:784; can't open MAD port ((null):0)    /usr/sbin/ibnetdiscover: iberror: failed: discover failed From the qlustar-documentation ( https://qlustar.com/book/docs/qluman-guide#Configuring-IB) I know that I need to setup nodes that run OpenSM (Set Generic Property->OpenSM Ports->ALL); this I have, the service is running. Also, "the pre-defined hardware property IB Adapter with a value of true must be assigned to a host, to explicitly enable IB for it" But in my hardware properties no "IB Adapter" is available (only #CPU cores, #CPU sockets, HW Type, Size of RAM and Chassis Color). I expect this to be the issue; but what is wrong there? Any help is highly appreciated. Best regards, Tobias Moehle