Chapter 3 Hardware Architecture 3-5
3.5 Networking and I/O
Networking and I/O are provided by the following chips and interconnects:
■ICH9 I/O controller hub
■PCI Express Bus
■LPC bus interface
■Redundant BIOS
■TrustedPlatform Module
■Broadcom 5715C Gbit Ethernet chip
■Sun 10 GbE Multithreaded Networking TechnolgyDual 10-Gbit + Dual 1-Gbit
Ethernet chip

3.5.1 ICH9 I/O Controller Hub

The ICH9 I/O provides legacy function support similar to that of previous
ICH-family devices, but with extensions in Serial-ATAtechnology and 64-bit/66
MHz PCI-X support. The ICH9 I/O also includes integrated USB 2.0 and USB 1.0
support, an LPC interface, a system management interface, a power management
interface, PECI interface, integrated Gigabit Ethernet controllers (not used on Sun
Netra CP3250 blade server), and an integrated DMA controller.

3.5.2 PCI Express Bus

PCI Express 1.0 (PCIe) is a high-speed, point-to-point dual simplex chip
interconnect. It is the latest extension of the PCI bus. PCIe operates at 2.5 GHz and
supports land widths of x1, x2, x4, x8, x16, and x32. Additional features include:
■Serial point-to-point interconnect between two devices
■Each lane supports two differential signal pairs, one pair for each data direction
■2.5-Gbyte/sec transfer rate
■Scalable performance based on the number of lanes implemented per interconnect