89hpes32nt24ag2 Integrated Device Technology, 89hpes32nt24ag2 Datasheet - Page 5

• Manufacturer Part Number: 89hpes32nt24ag2
• Description: 32-lane 24-port Pcie Gen2 System Interconnect Switch With Non-transparent Bridging
• Manufacturer: Integrated Device Technology

Feature Descriptions & Benefits
Switch Partitioning
allows a switch to be statically or dynamically reconfigured into multiple
independent logical switches within a single physical device.
PES32NT24AG2 can support up to 8 partitions. Any port can be an
upstream port or downstream port and any root can have zero, one, or
more downstream ports associated with its partition (see Figure 6). The
partition configuration can be done statically or dynamically by writing
into the switch configuration registers via configuration EEPROM, I
interface, or one of the roots.
benefits and differentiating value proposition for your products. See
Table 1 for a partial list of these benefits.
Replacing Multiple Discrete Switches
Express domains, it can replace multiple discrete PCI Express switches,
providing savings in cost, power, and board space.
IDT 89HPES32NT24AG2 Product Brief
Switch partitioning is an innovative and unique IDT feature that
Switch partitioning enables a number of applications, allowing unique
When switch partitioning is configured with multiple independent PCI
Replacing multiple discrete
switches
Bandwidth balancing in multi-root
multi processor systems
Flexible slot mapping
Port failover in high availability
systems
I/O
I/O
P2P
P2P
P2P
Table 1 Switch Partitioning Applications and Benefits
Figure 6 Example of Switch Partitioning Logical View
ROOT
ROOT
Application
P2P
P2P
P2P
I/O
I/O
P2P
P2P
P2P
P2P
P2P
P2P
I/O
I/O
I/O
I/O
P2P
P2P
P2P
ROOT
ROOT
I/O
I/O
P2P
P2P
P2P
P2P
P2P
P2P
P2P
P2P
P2P
I/O
I/O
Saves power, space and cost over
multiple discrete PCIe switches
Improved performance through
optimal allocation of system
resources
Saves power, space and cost over
PCIe signal switch solutions
Enables configurations that are
not practical using PCIe signal
switches
Provides greater flexibility than
movable upstream port or
upstream port failover
I/O
I/O
P2P
P2P
P2P
ROOT
ROOT
I/O
I/O
P2P
P2P
P2P
P2P
P2P
P2P
Benefits
P2P
P2P
P2P
I/O
I/O
I/O
I/O
P2P
P2P
P2P
ROOT
ROOT
P2P
P2P
P2P
P2P
P2P
P2P
I/O
I/O
P2P
P2P
P2P
I/O
I/O
2
5 of 7
C
Bandwidth Balancing
balancing to optimize overall system throughput (Figure 7). A multi-root
system, such as in bladed systems, may have unbalanced traffic density
across its I/O cards. System bandwidth balancing can be performed by
dynamically re-allocating low-traffic or idle I/Os to heavy traffic density
partitions from the software application layer.
Flexible Slot Mapping for Hardware Re-Use
hardware re-use for multiple variants of product line configurations to
meet the customized needs of your end customers, saving cost and
improving time to market.
uration using the same hardware platform with a different switch parti-
tioning setup.
Advanced Failover
tage of dynamic switch partitioning by re-allocating downstream ports to
a standby/secondary root upon failure (Figure 9). The device provides a
built-in automatic failover mechanism by specifying failover configuration
registers. Failover can be initiated by software, external signal pins, or
by a watchdog timer.
Figure 7 Dynamic Redistribution of I/Os to Optimize System Bandwidth
I/O
I/O
I/O
I/O
I/O
Dynamic switch partitioning can be utilized to perform I/O bandwidth
The flexibility of port mapping in switch partitioning allows maximum
Figure 8 below illustrates a 2-socket CPU vs. a 4-socket CPU config-
Multi-root systems with high availability requirement can take advan-
ROOT
ROOT
ROOT
CPU
CPU
I/O
I/O
I/O
I/O
I/O
“Northbridge” /
“Northbridge” /
I/O Controller
I/O Controller
I/O
I/O
I/O
I/O
I/O
4 Socket Server—Base Design
4 Socket Server—Base Design
I/O
I/O
I/O
I/O
I/O
89HPES32NT24G2
89HPES32NT24G2
89HPES32NT24G2
89HPES32NT24G2
89HPES32NT24G2
CPU
CPU
System Interconnect Switch
System Interconnect Switch
64-lane, 16-port PCIe Gen2
64-lane, 16-port PCIe Gen2
System Interco nnect Switch
System Interco nnect Switch
System Interco nnect Switch
Initial System State
Initial System State
64-lane, 16-port PCIe Gen2
64-lane, 16-port PCIe Gen2
64-lane, 16-port PCIe Gen2
ROOT
ROOT
ROOT
I/O
I/O
I/O
I/O
I/O
Figure 8 Example of Flexible Slot Mapping
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
CPU
CPU
I/O
I/O
ROOT
ROOT
ROOT
“Northbridge” /
“Northbridge” /
I/O
I/O
I/O
I/O Controller
I/O Controller
I/O
I/O
I/O
I/O
I/O
I/O
I/O
CPU
CPU
I/O
I/O
I/O
I/ O
I/ O
ROOT
ROOT
ROOT
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
ROOT
ROOT
I/O
I/O
I/O
I/O
CPU
CPU
I/O
I/O
2 Socket Server—Reduced Cost Design
2 Socket Server—Reduced Cost Design
I/O
I/O
“Northbridge” /
“Northbridge” /
I/O Controller
I/O Controller
I/O
I/O
Re-allocated Resources
Re-allocated Resources
I/O
I/O
89HPES32NT24G2
89HPES32NT24G2
September 15, 2009
System Interconnect Switch
System Interconnect Switch
64-lane, 16-port PCIe Gen2
64-lane, 16-port PCIe Gen2
I/O
I/O
ROOT
ROOT
89HPES32NT24G2
89HPES32NT24G2
I/O
I/O
CPU
CPU
System Interconnect Switch
System Interconnect Switch
64-lane, 16-port PCIe Gen2
64-lane, 16-port PCIe Gen2
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
ROOT
ROOT
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
ROOT
ROOT
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O