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Highlights
Applications
Interfaces
Product Specifications

High Availability: To meet the rigorous uptime and reliability
requirements of carrier edge networks, the ST-series platform
minimizes network outages and improves service resiliency through fully redundant hardware and scalable, modular ShadeTree™ System Software. The ST-series hardware architecture ensures that functionality is allocated to multiple components, eliminating any single point of failure and enhancing performance. All common equipment is redundant and hot-swappable for maximum uptime and reliability, including: Route Control Processors (RCPs), System I/Os (SIOs), Packet Switching Fabrics (PXFs), Network Processor Blades (NPBs), power supplies and fan trays.

Distributed Architecture: The distributed ST-series architecture
utilizes separate processes for routing, management and forwarding, providing fault isolation and ensuring always wire-speed performance with all services enabled.

Advanced ShadeTree System Software: Laurel’s ShadeTree
System Software delivers unmatched reliability, scalability and service flexibility. Advanced recovery capabilities including Laurel Instant Versioning (LIVE) hitless software patches, non-stop forwarding, fast re-route and graceful restart ensure the system is always available—even under extreme conditions.

Fully Integrated Service Management: Seamless connectivity to
back-office and higher-level operational support systems is achieved via advanced application programming interfaces with the Laurel Provisioning System™ (LPS), a powerful, integrated service provisioning and management system for ST-series routers. The result is dramatically reduced provisioning time and cost as well as improved service and network management through enhanced efficiency, security and reliability. For broadband applications, ST-series policy management enables advanced IP-based services over DSL while allowing dynamic self-provisioning of services via web portals or other applications.

Robust QoS and Traffic Management: The ST-series precisely
delivers multiple service classes over an IP or MPLS backbone,
allowing carriers to confidently deploy any type of service
including broadband, ATM, Frame Relay, Ethernet and IP-based services such as VoIP. The result is dependable, predictable performance for all types of traffic—even delay-sensitive voice and video traffic.
• Per logical interface queuing ensures each interface is guaranteed a fair amount of bandwidth
• Hierarchical scheduling provides four levels of scheduling to
ensure that customers receive only their purchased bandwidth—
nothing more, nothing less
• Wire-speed packet classification provides differentiated services
based on Layer 2 and IP classifiers
• Standard and custom policing schemes enable the creation of
burstable services with guaranteed bandwidth
• Weighted random early detection (WRED) congestion
management maximizes link utilization and ensures traffic
delivery under congestion
• Flexible queuing strategies provide up to eight distinct
strict priority or weighted fair queuing (WFQ) queues per
logical interface, ensuring service level agreements are met
without exception

Unmatched Interface Flexibility: Unlike platforms that require
specific line cards for specific services, the ST-series features
AnyService on AnyPort @ AnySpeed capabilities, with software-configurable SONET/SDH and AnyRate Gigabit Ethernet interfaces
that support a wide range of speeds and service types in a single channel.This reduces sparing costs, eliminates stranded ports and enables interface reuse as access network technologies change and bandwidth demands increase.

Complete Security: To meet the high level of security required in
carrier networks, the ST-series architecture ensures that all aspects of service delivery are secured, including the management plane, control plane and data plane. Confidentiality of user traffic is
preserved using secure tunnels, access control lists, encryption and authentication (e.g., RADIUS,TACACS+). In addition, the ST-series has been certified to prevent a wide range of denial of service attacks.