BCM5646 データシートの表示（PDF） - Broadcom Corporation
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BCM5646 Datasheet PDF : 1 Pages
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BCM5646
®
STRATASWITCH II™ BCM5646 INTEGRATED MULTI-LAYER SWITCH
FEATURES
SUMMARY OF BENEFITS
• 24 10/100 Mb and 2 10/100/1000 Mb Ethernet ports
• High-speed 2.5-Gbps TurboGigTM stacking link
• 8.9 Mpps (line rate) switching
• 1-4 Classes of Service (COS); map to 802.1p priority
• IGMP snooping
• Integrated (8k) L2 table with auto learning
• Integrated (2k) L3 table
• Integrated (256 KB) data packet memory
• 64- or 128-bit-wide SDRAM support
• Spanning Tree support per VLAN
• DiffServ compliant
• Stacking architecture compatible with StrataSwitch ITM
• IEEE 802.1Q.D support
• Fast Filter Processor (FFP)
- Examines up to the 80th byte of a packet
- Supports TOS and DiffServ field modification
- Bandwith regulation and monitoring per network flow
- Network data flow tracking granular to 1 Mbps
• 2.5-Gbps TurboGigTM stacking link defines the next generation
of performance for 48-port switching devices
• Optimized for 48FE+2GE and 24+2GE switches
• New service offerings for ISPs
- Pay for bandwidth consumption
- Voice over IP
- Police over-consumption of network resources
- Line rate switching on all ports
• Greater insight to network resource utilization through the
advanced FFP features
• More efficient deployment of existing network resources
through insight provided by StrataSwitch IITM feature set
• Line rate switching on all ports for:
- Layer 2 switching
- All FFP actions — steering, forwarding, reclassifying
• Low device power, 3W (<120 mW/ FE port), enables low-cost
power supplies
• High level of integration minimizes PCB layer count and
routing issues
• Flexible (128- or 64-bit) SDRAM interface supports low system
cost of memory
BCM5646 Application Diagram
2Mx32
SDRAM
2Mx32
SDRAM
2Mx32
SDRAM
2Mx32
SDRAM
PCI
Bus StrataSwitch IITM
BCM5646
TurboGigTM
StrataSwitch IITM
BCM5646
8
8
8
1G 1G
8
8
8
BCM5238 BCM5238 BCM5238 BCM5421 BCM5421 BCM5238 BCM5238 BCM5238
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