Table 2-2. Quadrics and Myrinet Interconnect Port Identifiers
Identifier Element	Definition		Back
Q	Quadrics, the generic name for the QsNetII interconnect.		TOC
M	Myrinet, the generic name for Myrinet interconnects.
Rx	Rail number. The first PCI host-bus adapter in the node is rail 0. In dual rail configurations, the rails are designated R0 and R1.
Nxx	Node-level interconnect.
Txx	Top-level interconnect.
-CTRL-A	Indicates which controller contains the destination port for the cable link. Some types of interconnect might contain two controllers, designated A and B.
-0.1	Indicates the physical 10/100–base/T port on the controller. Quadrics controllers contain clock (CLK-IN) ports with a format similar to the RJ-45 networking port. Ensure that you always use the port labeled 10/100.
NOTE:         At the time of publication, dual-rail configurations are supported for Myrinet interconnects only.