Supports eight 10/100 Mbit/s Ethernet ports with RMII interface Capabl

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Supports eight 10/100 Mbit/s Ethernet ports with RMII interface Capabl

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AL126 Advance Information Port 10/100 Mbit/s Dual Speed Fast Ethernet Switch
Supports eight 10/100 Mbit/s Ethernet ports with RMII interface Capable trunking Mbit/s link with link fail-over Full- half-duplex mode operation Supports addresses with VLAN without VLAN Scalable design stackable switch implementation RoX-II expansion link supports Gbit/s throughput Gigabit Ethernet ready with AL1022 Flexible prioritized queueing multimedia data traffic Layer switching with AL3000 RoX-II IEEE 802.3x flow control full-duplex operation Optional backpressure flow control support half-duplex operation 802.1p support with four priority levels 802.1q based port based VLAN support, VLAN table IGMP frame trapping Supports multicast groups RMON SNMP support with AL300A management (MIB) device 0.25 micron, 2.5V 3.3V CMOS technology Packaged 456-pin
AL126 eight-port 10/100 Mbit/s dual-speed Ethernet switch. low-cost scalable solution 32-ports achieved through cost buffer memory Allayer's proprietary RoX-II architecture. addition, AL126 also supports port-based 802.1q VLAN, 802.1p priority, IGMP frame trapping, multiple-port aggregation trunks.
10/100
Switch Controller
Buffer Manager
10/100 Expansion Interface
10/100 High Speed Switch Fabric
Address Control
10/100
10/100
Address Table
Address Table Expansion
10/100 EEPROM Interface Management Information 10/100
10/100
Figure
System Block Diagram
Reference Only Allayer Confidential
AL126 Advance Information
AL126 Overview
AL126 eight-port 10/100 Ethernet switch chip with RoX-II expansion interface. RoX-II interface Gbit/s data ring (6.4 Gbit/s full-duplex) control ring interface. RoX-II support four switch-chips management device (AL300A) router (AL3000) chip. Various combinations used different configurations. maximum port configuration will 32-port Mbit/s ports 24-port 10/100 Mbit/s plus Gigabit Ethernet ports, eight Gigabit ports. Higher port count stacking configurations achieved with additional bridges (AL182) crossbar-based Concentrator (AL188) devices. RoX-II interface supports management device, AL300A. SNMP RMON supported through this management device. RoX-II interface also supports Layer Layer switching provided AL3000. Because AL3000 AL300A functions integrated, there need separate AL300A AL3000 already RoX-II bus. AL126 also supports trunking applications. chip provides optional load balancing schemes, explicit dynamic. With trunking, possible group eight full-duplex links together form single 1600 Mbit/s link. device also supports current IEEE 802.3ad specification. Data received from interface stored external memory buffer. AL126 utilizes cost-effective SGRAM provide 8-Mbit 16-Mbit buffer memory. AL126 provides flow-control methods. half-duplex operations, optional jamming based flow-control (also known backpressure) available prevent loss data. With this method flow-control, switch will generate signal when receive-buffer full. full-duplex mode, AL126 utilizes IEEE 802.3x flow control mechanism. ports support multiple addresses. switch-chip supports addresses with VLAN without VLAN through external SSRAM. AL126 operates only store forward mode. entire frame checked errors frames with errors automatically filtered forwarded destination port. device also provides multicast group addresses multicast applications. AL126 perform IGMP frame trapping forward them CPU. This allows participate IGMP protocol determine which ports should participate multicast session. switch initialized configured external EEPROM. unmanaged switch design, there need CPU, aparallel interface utilized reprogram EEPROM field reconfiguration. device supports port-based tagged VLAN (IEEE 802.3ac/802.1q VLAN) workgroup segment switching applications. AL126 supports 802.1p with four levels priority queues. Relative priority controlled either programmable Weighted Round-Robin Strict Priority. device also provides levels security intrusion protection which implemented per-port basis. Other features include port monitoring broadcast storm filtering reduce broadcast traffic through switch.
2/2000
Reference Only Allayer Confidential

Supports eight 10/100 Mbit/s Ethernet ports with RMII interface Capabl

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