- 您现在的位置：买卖IC网 > PDF目录67672 > GT-48002A (Galileo Technology Services, LLC) Switched Fast Ethernet Controller for 100BaseX(100BaseX交换式快速以太网控制器) PDF资料下载
参数资料
| 型号： | GT-48002A |
| 厂商： | Galileo Technology Services, LLC |
| 英文描述： | Switched Fast Ethernet Controller for 100BaseX(100BaseX交换式快速以太网控制器) |
| 中文描述： | 交换式快速以太网控制器（100BaseX交换式快速以太网控制器的100BaseX） |
| 文件页数： | 70/102页 |
| 文件大小： | 1001K |
| 代理商： | GT-48002A |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页当前第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页
Switched Fast Ethernet Controller
Revision 1.2
7
1.3
Address Recognition
Each GT-48002A in a system can recognize up to 8,000 different Unicast MAC addresses and unlimited Multicast/
Broadcast MAC addresses. An intelligent address recognition mechanism enables filtering and forwarding packets at
full Fast Ethernet wire speed. Hardware assist for address aging and static addresses is also included.
The GT-48002A provides an address self-learning mechanism. Each device has a private address table located in its
DRAM array. As the GT-48002A learns new addresses, it updates all address tables in the system via the GalNet mes-
saging protocol.
1.4
CPU Packet Routing
The GT-48002A has the capability to automatically forward certain packets to the CPU for routing including:
Unicast packets with a destination address tagged for the CPU
Multicast packets
Unknown packets (packets with MAC addresses that have not been recognized)
This gives the system designer the flexibility to decide how to handle such packets in a managed system.
1.5
Intervention Mode
The GT-48002A incorporates an enhanced feature called
intervention mode. This feature permits software or hardware
intervention in the packet routing decision mechanisms for unicast packets. When intervention mode is selected for a
MAC address, the GT-48002A sends the packet to the system CPU instead of switching it as usual. This capability can
be used for many functions including: layer 3 routing, security, virtual LAN support, filtering and management.
1.6
Network Management Features
The GT-48002A provides comprehensive management capabilities enabling the switch OEM to implement a wide
range of network management features.
For OEMs offering RMON capability, the GT-48002A provides per-port statistics counters and PCI traffic counters. In
addition, the GT-48002A provides station-to-station connectivity matrix information and the ability to select a port to
work in monitoring (sniffer) mode.
Also included in the GT-48002A is a unique packet sampling capability invented by the Hewlett-Packard Company
called HP-EASE (Embedded Advanced Sampling Environment.) Each port has the ability to take “snapshots” of packet
data at programmable intervals. These samples are forwarded to the management CPU for processing. The samples
can be used to implement HP-EASE compatible messages for OpenView environments, or to create custom manage-
ment information bases such as statistical RMON. Since packets are sampled using this technology, much less local
processing is required over standard RMON implementations. Source addresses of every errored packet are also sent
to the CPU allowing switch OEM to support error counters in RMON host and matrix groups.
Also included in the GT-48002A is hardware assistance for address aging and bridge spanning tree algorithms.
1.7
DRAM Interface
Each GalNet device in the system requires its own, separate EDO DRAM buffer space. The DRAM is used to store the
incoming/outgoing packets as well as the address table and other device data structures. The interface to EDO DRAM
is glueless; all signals needed to control EDO devices are included. For more information, see Section 16.
相关PDF资料 |
PDF描述 |
|---|---|
| GT-48004A | Four Port Switched Fast Ethernet Controller(四端口、交换式快速以太网控制器) |
| GT-48006A | Low Cost Two Port 10/100Mbps Ethernet Bridge/Switch Controller(低成本、双端口10/100Mbps以太网桥式/交换式控制器) |
| GT-48207 | Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高级交换式 10+10/100 BaseX以太网控制器) |
| GT-48208 | Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高级交换式 10+10/100 BaseX以太网控制器) |
| GT-48212 | Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高级交换式 10+10/100 BaseX以太网控制器) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| GT482 | 制造商:CORNELL DUBILIER ELECTRONICS 功能描述:Cap Ceramic 82pF 3000V SL 5% (12 X 6mm) Radial 9.5mm 85°C |
| GT48212-A6-PBB1C000 | 制造商:Marvell 功能描述: |
| GT48212-A6-PBB-C000 | 制造商:Marvell 功能描述:12 PORT E + 2 PORT FE SWITCH (MANAGED) - Trays |
| GT48300-A1-BBE1C083 | 制造商:Marvell 功能描述:Marvell GT48300-A1-BBE1C083 |
| GT48300-A1-BBE-C000 | 制造商:Marvell 功能描述:Marvell GT48300-A1-BBE-C000 |
发布紧急采购，3分钟左右您将得到回复。