Supports 10/100 Mbit/s ports Capable trunking Mbit/s link Trunk fail-o

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Supports 10/100 Mbit/s ports Capable trunking Mbit/s link Trunk fail-o

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AL103 Advance Information PORT COST 10/100 SWITCH
Supports 10/100 Mbit/s ports Capable trunking Mbit/s link Trunk fail-over feature Full- half-duplex mode operation Speed auto-negotiation through MDIO Built-in storage addresses Designed utilize low-cost SGRAM Serial EEPROM interface low-cost system configuration Automatic source address learning Secure mode traffic filtering Product Description AL103 eight-port 10/100 Mbit/s dual speed Ethernet switch. low-cost Fast Ethernet switch implemented using AL103 with low-cost SGRAM. AL103 also supports VLAN multiple port aggregation trunks. Broadcast storm control Port monitoring support IEEE 802.3x flow control full-duplex operation Optional backpressure flow control support half-duplex operation Supports store-and-forward mode switching VLAN support AL102A compatible 0.35 micron, 3.3V CMOS technology Packaged 256-pin PQFP
10/100
Switch Controller
Buffer Manager
10/100
10/100 High Speed Switch Fabric
Address Control
10/100
10/100
Address Table
10/100 EEPROM Interface
10/100
10/100
Figure
System Block Diagram
AL103 Overview
Reference Only Allayer Confidential
AL103 Advance Information
AL103 provides eight 10/100 Mbit/s Ethernet ports. Each port supports both Mbit/s data rate. operation mode auto-negotiated PHY. ports full-duplex capable. device also supports VLAN workgroup segment switching applications. AL103 also supports trunking applications. chip provides optional load-balancing schemes, explicit dynamic. With trunking, possible group four full-duplex links together form single Mbit/s link. Data received from interface stored external memory buffer. AL103 utilizes cost effective SGRAM provide 8-Mbit 16-Mbit buffer memory. During transmission, data obtained from buffer memory routed destination port's output buffer. collision occurs half-duplex operation, control will back retransmit accordance IEEE 802.3 specification. AL103 provides flow control methods. half-duplex operations, optional jamming based flow control (known backpressure) available prevent loss data. With this method flow control, switch will generate signal when receive buffer full sending station will start transmit until line clear. full-duplex mode, AL103 utilizes IEEE 802.3x flow control mechanism. ports support multiple addresses. switch chip supports addresses internally. These addresses shared among eight ports. initialization configuration switch programmed external EEPROM. Field reconfiguration achieved using parallel interface reprogram EEPROM. AL103 also supports port-based VLAN. VLAN register used configure destination ports multicast broadcast frames. device also provides levels security intrusion protection. Security implemented port basis. AL103 operates only store forward mode. entire frame checked error frames with errors automatically filtered will forwarded destination port. AL103 also features port monitoring broadcast storm throttling.
2/2000
Reference Only Allayer Confidential

Supports 10/100 Mbit/s ports Capable trunking Mbit/s link Trunk fail-o

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