AL3000 Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – IP Frame Routing Processor

AL3000
Advance Information
IP Frame Routing Processor
• Provides routing functions to Allayer’s RoX-II • Re-assigns VLAN tag and priority for each
bus Ethernet Switching devices
routed frame
• Supports up to 32 Fast Ethernet or dual Gigabit • Programmable replacement of MAC and/or IP
ports on the RoX-II bus
fields with associated Layer 3 and Layer 4
• High performance Network (Layer 3) and
check-sum recalculation
Transport (Layer 4) address look-up engine • Supports 802.3ad port aggregation
• Layer 2-, 3-, or 4-flow packet classification • Supports virtually unlimited physical inter-
• Programmable key search based on MAC and IP
source and destination address, TCP socket,
faces and as many logical interfaces as soft-
ware is capable
UDP socket or IP protocol number
• Congestion control for each physical interface
• Supports up to 131,072 individual host route
and the overall routing engine
entries
• Packet bandwidth control for each Layer 3 or
• Supports 802.1q priority schemes and provides ^{Layer 4 flow}
four Quality of Service (QoS) queues
• Layer 3 buffer pool of up to 1024 frames
• Provides Network Address Translation (NAT) • Provides Ethernet, Bridge, and RMON MIB
per route database entry
support for RoX II bus devices
• Provides support for IP Proxy Services with re- • Six high-speed DMA engines
mappng of Layer 4 Socket replacements
• 0.25 micron, 2.5V / 3.3V CMOS technology
• Programmable entry aging via internal timers _{• 456-pin BGA package}
and via external real-time clock
32-bit uP ₄₈
Bus
Processor
Interface/
DMA Control
Management
DMA Host
Engine
Interface to Switch Device
20
4
I/O Packet
Engines
RoX II
Interface
3.3 Volts
GND
Command
Interpreter
CLK
Reset
Search
Engine
Scan/Test
5
SGRAM Interface
Search Memory ₄₈
SGRAM 4-8 MB
Figure 1 System Block Diagram
Parser / Result
Engine
Memory &
Queue
Server
SGRAM Interface
Packet Memory ₈₀
SGRAM 2 MB
RoX II
Ring Control
Output
Queue/
RAM Control
Reference Only / Allayer Confidential