Switching
Solutions
Prestera
廬
-EX126
IPv6-Enabled 12 Gigabit Ethernet
Packet Processor
98EX126
PRODUCT OVERVIEW
The Marvell
簍
Prestera
簍
-EX family of packet processors delivers multi-layer enterprise switching with exceptional
performance and industry-leading features. The Prestera-EX126 product integrates 12 Gigabit Ethernet (GbE) ports
and a 16 Gbps uplink bus for uncompromising, non-blocking performance and system scalability. This complete
system-on-chip (SoC) device supports line rate IPv6/IPv4 Unicast & Multicast Routing, IP-in-IP Tunneling, L2
Bridging support along with advanced L2-L4 Traffic Classification, Filtering, and Prioritization. The 98EX126
device provides the ideal solution for rapid development of high-port density GbE chassis, stackable and standalone
switching systems. The Prestera-EX family provides a complete line of FE, GbE and 10 GbE switching solutions
with 100% software compatibility across the product line.
Uplink Bus
Uplink Interface
CPU
SecureControl
PCI
DDR-SDRAM
CPU Interface
Buffer DRAM Interface
Scheduling & sFlow
Egress Processing
UC/MC Routing Tables
On Chip TCAMs
ARP/MAC VLAN Tables
12 Ports GbE RGMII
IPv4/6 Routing
External SRAM Interface
Traffic Management
Policy Engine
L2 Engine
DDR-SDRAM
IPv4/IPv6
Memory
IPv6
Memory
Buffer
SDRAM
Alaska
簍
Gigabit PHY
Fig 1. Prestera Packet Processor (98EX126) Block Diagram
SPECIAL FEATURES
樓
IPv6
脨 Line rate IPv6 Unicast routing
脨 Line rate IPv6 Multicast routing
脨 IP-in-IP tunneling
脨 Address scope checking
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Marvell Policy Control Lists
脨 On-chip TCAM
脨 48 byte-wide match key with logical offsets
脨 Dual Policy lookup with individual actions
脨 Comprehensive list of Policy Action Entities
脨 Multiple TCAM lookup modes
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SecureControl
脨 8 priority queues for To-CPU & From-CPU packets
脨 Advanced scheduling and rate limiting of CPU-bound packets
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Distributed Switching Architecture (DSA)
BENEFITS
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Future-proof networks with hardware support for IPv6
脨 Performance for enterprise & service provider deployments
脨 Purpose-built for peer-peer & multimedia applications
脨 Best-in-class support for IPv6-IPv4 co-existence and migration
脨 For Layer 3 forwarding security with line rate performance
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State-of-art security via Packet Classification and Control
脨 Provides optimized and deterministic behavior
脨 Precise user defined keys, full support for IPv6 rules
脨 Granular classification with easier rule table management
脨 For granular control over packet forwarding
脨 For efficient use of TCAM and increased number of policies
樓
Enables best-in-class high availability feature set
脨 Enables prioritization and control of CPU traffic
脨 Prevents Denial of Service attacks on CPU
樓
Permits design of value line cards and systems with Marvell
Prestera DX and Link Street
簍
SOHO devices
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