Service Router Operating System

A proven OS for service routing

Scale, reliability and performance support rich service mix

The Nokia Service Router Operating System (SR OS) is built to power the most demanding and dynamic Ethernet and IP/MPLS networks. A proven, robust and highly-reliable OS, its broad feature set is deployed in more than 450 networks worldwide.

SR OS maximizes service scale and delivery with non-stop routing capabilities – helping differentiate service offerings. At the heart of the Nokia IP/MPLS router portfolio, SR OS is the foundation for a consistent, simplified and reliable operating environment across IP, MPLS and Ethernet domains.


Architected for high availability

In today's high-performance service provider IP networks, the ability to ensure a high-availability networking environment is critical. With network connections and service flows running at Gigabit, 10 Gigabit or even 100 Gigabit speeds, even a small network disruption can impact thousands of subscribers and lead to severe penalties.

SR OS is purpose-built to meet the reliability demands of an always-available IP/MPLS service environment. Based on a real-time, modular, and highly fault-tolerant design, the operating system has strict separation between the control plane and forwarding plane. This approach enables the delivery of non-stop routing and non-stop services, even in the event of a control plane failure.

In-Service Software Upgrades (ISSU) are supported for both major and minor releases. This allows software updates to be done on a live system without a service-impacting system reboot.

Service providers can build highly robust IP network architectures based on the advanced high-availability features in SR OS including: multi-chassis link aggregation, multi-chassis automatic protection switching, multi-chassis ring protection, and MPLS fast reroute.

Unmatched scale and performance

High-performance routing requires more processing capability than can be delivered on current single core CPU hardware architectures. Multi-core CPUs can:

  • Deliver highly scalable processing power
  • Support the demands of delivering advanced OAM across thousands of service flows
  • Improve routing convergence times by more than 40%

To further enhance the power of multi-core processing, Nokia has created a different approach to software operating system design.

SR OS supports Symmetric Multiprocessing (SMP), a multi-thread software approach. This provides the ability to schedule and run different tasks on different processor cores concurrently. With SMP, SR OS fully unleashes the power and performance of multi-core processing to deliver unmatched service scale and routing performance.


Exceptional services

Services are the lifeblood of the service provider. To drive top-line revenues, they need the ability to deliver an ever-expanding portfolio of non-stop, value-added and differentiated services.

SR OS supports the industry's most comprehensive suite of IP-based services across the mobile, residential, and business service domains. The operating system is unmatched in the breadth and depth of advanced routing features and services:

  • Enhanced subscriber management, BRAS and BNG features for the delivery of broadband residential services
  • Advanced Ethernet (VLL, VPLS) and IP (IPv4/IPv6/IP multicast) VPN services
  • Wi-Fi, IPsec, IPv6, multicast and many others
  • Highly scalable IP and MPLS protocol support
  • Leading BGP, PIM, and IGP (OSPF and IS-IS) features and performance

One OS for simplified operations

Multiple networks, multiple routing platforms, and multiple operating systems all add up to one big headache for network operators.

SR OS is supported across the entire Nokia IP/MPLS router portfolio, spanning access and aggregation, metro and service edge, and the core. A single operating system across all Nokia IP platforms assures service providers of consistent and reliable operations and management across end-to-end Nokia IP networks.


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