About The Pci Cards And Buses - Sun Microsystems Sun Fire V445 Server Administration Manual

The 100BASE-T network management port on the ALOM system controller is
reserved for use with the ALOM system controller and the system console. The
network management port does not support connections to Gigabit networks. If
your configuration requires a high-speed Ethernet port, use one of the Gigabit
Ethernet ports instead. For information on configuring the Gigabit Ethernet ports,
see Chapter 7.
The ALOM system controller card must be installed in the system for the system
to function properly.

About the PCI Cards and Buses

All system communication with storage, peripherals and network interface devices
is mediated by four buses using three Peripheral Component Interconnect (PCI)
bridge chips on the system motherboard. The Fire ASIC PCIe Northbrige manages
communication between the system main interconnect bus (J-Bus) and two PCIe
buses. In addition, two PCIe/PCI-X bridge ASICs manage communication from each
PCIe bus to two PCI-X buses, giving the system a total of four PCI buses. The four
PCI buses support up to four PCIe interface cards and four PCI-X interface cards, as
well as multiple motherboard devices.
describes the PCI bus characteristics and maps each bus to its associated
TABLE 4-2
bridge chip, integrated devices, and PCI card slots. All slots comply with PCI Local
Bus Specification Revision 2.2.
Note – PCI cards in a Sun Fire V445 server are not hot-pluggable or hot-swappable.
Chapter 4 Configuring Hardware 81