OpenSM lid and more...

On centOS 6.5
yum groupinstall "Infiniband Support"
yum install infiniband-diags

Infiniband diagnostics tools are containing nice "weapons" to eliminate network BUGS.
One of them is:
 saquery - query InfiniBand subnet administration attributes



 it looks like this:

NodeRecord dump:
                lid.....................0x7D
                reserved................0x0
                base_version............0x1
                class_version...........0x1
                node_type...............Switch
                num_ports...............36
                sys_guid................0xf452140300365230
                node_guid...............0xf452140300365230
                port_guid...............0xf452140300365230
                partition_cap...........0x8
                device_id...............0xC738
                revision................0xA2
                port_num................0
                vendor_id...............0x2C9
                NodeDescription.........MF0;switch-cf2826:SX6036/U1