Datasheet

Intel
®
Xeon
®
Processor C5500/C3500 Series
February 2010 Datasheet, Volume 1
Order Number: 323103-001 141
PCI Express Non-Transparent Bridge
3.5.3 Connecting NTB Port on Intel
®
Xeon
®
Processor C5500/C3500
Series to Root Port on Another System - Non-Symmetric
Configuration
In the configuration shown in Figure 50, the NTB port on one Intel
®
Xeon
®
processor
C5500/C3500 series (the system on the left), is connected to the root port of the
system on the right. Although the second system is shown as a Intel
®
Xeon
®
processor
C5500/C3500 series system, it is not necessary for that system to be a Intel
®
Xeon
®
processor C5500/C3500 series system. Figure 51 shows a configuration where the NTB
port on Intel
®
Xeon
®
processor C5500/C3500 series is connected to the root port of a
non-Intel
®
Xeon
®
processor C5500/C3500 series system (any host that supports a
PCIE root port). Hence this configuration is referred to as the non-symmetric usage
model. Another valid configuration is to connect the root port on Intel
®
Xeon
®
processor C5500/C3500 series to an external non-Intel
®
Xeon
®
processor C5500/
C3500 series NTB port on a device.
The non-symmetrical configuration has a more general usage model that allows the
Intel
®
Xeon
®
processor C5500/C3500 series system to operate with another Intel
®
Xeon
®
processor C5500/C3500 series system through the NTB port on a single PCIE, or
to operate with a non-Intel
®
Xeon
®
processor C5500/C3500 series system through the
NTB port on Intel
®
Xeon
®
processor C5500/C3500 series or NTB port of the other
device.
Figure 50. NTB Port on Intel
®
Xeon
®
Processor C5500/C3500 Series Connected to Root
Port - Non-Symmetric
Intel® Xeon® Processor
C5500/C3500 Series
PCH
x4 x4x4x4x4
DMI
PCIE
TB
PCIE
NTB
System A
PCIE devices
Local host
Intel® Xeon® Processor
C5500/C3500 Series
PCH
x4 x4x4x4x4
DMI
PCIE
TB
System B
PCIE devices
Remote host