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参数资料
| 型号： | IXP425 |
| 厂商： | Intel Corp. |
| 元件分类： | 圆形连接器 |
| 英文描述： | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:37; Connector Shell Size:28; Connecting Termination:Crimp; Circular Shell Style:Right Angle Plug; Body Style:Right Angle |
| 中文描述： | 优化的宽带应用 |
| 文件页数： | 2/4页 |
| 文件大小： | 273K |
| 代理商： | IXP425 |
Distributed Processing Architecture
(continued)
The three NPEs are designed to offload many computa-
tionally intensive data plane operations from the Intel
XScale core. These tasks include: IP header inspection
and modification; packet filtering; packet error checking;
check sum computation; flag insertion and removal; PDU
segmentation and assembly; and encryption. The NPE
architecture includes an ALU, self-contained internal data
memory, an extensive list of I/O interfaces, together with
hardware acceleration engines (also known as NPE
coprocessors). It is the NPE coprocessor associated
with an NPE that targets a set of networking applications.
Each NPE coprocessor is designed to accelerate a
specific networking task that would otherwise take many
MIPs to complete by a stand-alone RISC processor.
Each NPE can take care of Layer 2 and, in some cases,
Layer 3 packets that are passed through them. For example,
the WAN/Voice NPE has one UTOPIA 2 interface and two
high-speed serial interfaces so its internal processing is
targeting the handling of AAL (1/2/5) SARing, TDM framing,
and HDLC processing. An MII/RMII interface is attached
to both the Ethernet NPE A and the Ethernet NPE B
respectively. The Ethernet NPE A also has two internal
coprocessors to accelerate VPN related tasks such as
3DES and Hashing at speeds up to full-rate ADSL. The
Ethernet NPE B is capable of handling 100Mb/s, full-duplex
Ethernet packet filtering. The extensive hardware capabilities
of these NPEs are all under the management of a set of
NPE microcode drivers that are released as a software
library together with the Intel IXP425 network processors.
Customer applications configure and interact with the
NPEs through a high-performance API layer running on
the Intel XScale core.
Wire-Speed Performance
The Intel IXP425 network processors implement a fast
path design in the NPE software library to provide
optimized performance for broadband applications.
The fast path design passes non-inspection IP packets
directly from the ingress port NPE (usually WAN/Voice
NPE with the xDSL WAN port) to the egress port NPE
(usually Ethernet NPE A or B with the Ethernet LAN port)
without the involvement of the Intel XScale core. Since
the vast majority of IP packets move from the WAN to
the Ethernet LAN, isolating these data flows to the NPEs
within the Intel IXP425 network processor produces a
significant throughput improvement by eliminating the
need to route packets through a central processor. The
most demanding situation occurs when small (64 byte)
IP packets are sent at the speed that saturates the
physical layer (wire speed). For example, nearly 10,000
(64 byte) packets per second will be sent downstream
in an ADSL connection that runs at the maximum wire
speed (8 Mb/s downstream). The NPEs and fast path
design in the Intel IXP425 network processors are capable
of providing, at minimum packet sizes, wire-speed perfor-
mance up to 52 Mb/s on the WAN side and 100 Mb/s on
the Ethernet LAN.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IXP42X | 制造商:INTEL 制造商全称:Intel Corporation 功能描述:Intel㈢ IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor |
| IXP45X | 制造商:INTEL 制造商全称:Intel Corporation 功能描述:Product Line of Network Processors |
| IXP46X | 制造商:INTEL 制造商全称:Intel Corporation 功能描述:Product Line of Network Processors |
| IXPD610 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| IXPN4004AR | 制造商:UNBRANDED 功能描述:CHARGER, NICAD, CHARGER UPGRADE KIT |
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