Myrinet System Interconnect Guide

2
PCI cards
Every node in a cluster that uses a Myricom system interconnect has a PCI host
bus adapter (HBA), and each host interface has a connection to the interconnect.
This chapter presents the following information relating to the three versions of
the PCI card that might be used in an H P Cluster Platform solution:
• General characteristics o f the PCI card (Section 2.1)
• A description o f the single-port XP P CI R e v . D card (Section 2 .2)
• A description of the dual-port 2XP PCI Rev. E card (Section 2.3)
• A description of the single-port 2XP PCI Rev. F card (Section 2.4)
2.1 General characteristics
The Myricom PCI card can have a single port (LANai XP), as shown in Figure 2-2,
or dual (LANai 2XP) port, as shown in Figure 2-3. Each has at least one
multiprotocol communication port, referred to as the X-port. (LANai is the Myrinet
terminology for its P CI-X interface p rocessor.)
The faceplate of each PCI card has two LEDs. A green “link” LED illuminates
when the host is pow ered, the link is activ e, a nd the f irmw are is loaded on the host.
It blinks to show when packet traffic is flow i ng thro ug h the port. A yellow LED is
controlled by the RISC processor. It pulses when there is packet-send ing activity .
The LED on each s witch port indicates the state of that port. Green indicates the
port is powered, and a link is connected. Yellow indicates a fault. If the switch port
is unlit, the switch is not powered, or there is a problem with the line card. The
LEDs for the ports o nly light when there is a cable attached and the GM messag e
passing system from M yrinet is running. For more information about GM, see your
system software documentation and the following Myricom Web site:
http://www.myri.com/scs/index.html#documentation
A label similar to that shown in Figure 2-1 appears o n every PCI interface. This
label contains the product code, the serial number, and the Ethernet MAC address.
Figure 2-1: PCI Ide nt if ication Label
PCI cards 2-1