What is segment routing FAQs
How can segment routing help make my business more profitable?
First, you’ll save on OpEx and CapEx by simplifying the traffic forwarding processes across your network. Segment routing removes network state information from intermediate routers and places path information into packet headers at the ingress node instead. This approach reduces equipment, power, and operational resource requirements along the entire forwarding path networkwide.
Segment routing also helps you meet demands for new services and greater performance easily, affordably, and with consistent user experiences. Achieving these goals requires a network transport solution that provides control, agility, application awareness, and simplified traffic management, which segment routing delivers.
An independent research report from Omdia, Segment Routing in the 5G Era, summarizes the top reasons network operators are adopting segment routing.
- Reduced operational and capital expenses
- Improvements in network scalability and availability
- Support for per-service policies, committed or deterministic service-level agreements (SLAs), and network slicing
- Greater flexibility to offer differentiated, value-added services
- The ability to deliver reliable mobility services, including 5G and Internet of Things (IoT) connectivity
Segment routing becomes especially significant as the industry moves toward assured network slicing, which allows virtual, isolated logical networks to run on the same physical network infrastructure. Each slice can be placed onto dynamically created segment-routed paths with the ability to meet differentiated, custom application and subscriber requirements for quality of service.
How does segment routing work with network automation to improve or guarantee service quality?
Combining segment routing with network automation solutions, such as Juniper Paragon Automation, lets you deliver differentiated customer experiences and optimize your network for greater efficiency.
For example, segment routing with a WAN SDN controller enables more granular SLAs through latency-based routing. By dynamically serving users from the network segment or geographic region currently experiencing the lowest latency levels, segment routing guarantees service and application performance at lower cost through automation.
Some applications must meet strict end-to-end latency or packet loss requirements to function correctly. Without automation, operators lack the network agility required to guarantee differentiated service levels tailored to these application needs. Paragon Automation acting as a WAN SDN controller automatically places traffic on optimal paths to meet service-level objectives in a few different ways.
- Analyzes telemetry networkwide to avoid paths that don’t meet your objectives for latency, jitter, packet loss, and other metrics
- Computes network paths to meet performance goals
- Automates optimal path placement
Automation improves network predictability, resiliency, and SLAs while enabling new services to be brought to market faster. It also puts operators on a path towards more advanced use cases that include closed-loop remediation to further improve SLAs; it accomplishes this with powerful service-centric insights that continually measure end-to-end service quality on the data plane.
How does combining segment routing with a WAN SDN controller help in the COVID-19 era?
In pandemic times, there has been increased demand to support home workers, difficulties procuring network equipment due to semiconductor supply chain shortages, and concerns about adequate on-site staffing to test and deploy new equipment. Making the best possible use of assets by running the network “hotter” is a growing solution for alleviating these issues and helping increase profitability by curtailing CapEx spending.
Segment routing with a WAN SDN controller helps operators dynamically optimize resource utilization and reduce network CapEx by tapping into wasted capacity that’s often hidden because of over-provisioning to meet peak demand. Together, segment routing and software-defined networking (SDN) automate service path placement that meets bandwidth-on-demand requirements in several ways.
- Leveraging real-time visibility into networkwide utilization
- Automating path computation to avoid congestion
- Automating the provisioning and optimization of traffic-engineered/Label-Switched Paths (LSPs) based on utilization levels
These processes unlock available capacity in the network by using advanced algorithms for path placement and continuous optimization. Combining them with analytics to drive software-defined control enables the network to automatically avoid congestion.
Why is Juniper’s segment routing controller the right choice?
The Juniper Paragon Pathfinder is the industry’s most robust and fully featured WAN SDN controller for segment routing. It enables the fine-grained, software-defined control needed to guarantee service quality in the 5G and cloud era. The controller provides path computation with bandwidth reservation and conducts active network surveillance by continually receiving and analyzing telemetry data from different network elements. It can perform path computations at strategic times to avoid network delays or outages that are already occurring, such as congestion and fiber cuts. It can also route around future network events that it anticipates occurring, based on telemetry data analyses.
Collectively, segment routing and Paragon Pathfinder offer an innovative approach to traffic steering, which can be used to address priority activities such as traffic engineering and fast reroute. When used this way, segment routing simplifies routing protocols, network design, and network operations. Moreover, segment routing deployed in the context of a WAN SDN controller eliminates the need for LSP management for further simplification.
Why is Juniper a preferred vendor for enabling segment routing-based network transformation?
You can deploy Juniper segment routing on your existing Juniper infrastructure and avoid having to swap out your network hardware as you transition. We design our equipment using high-performance programmable ASICs that enable you to build out your segment routing environment with industry-leading scalability while continuing to use the same, consistent Junos operating system you already rely on.
Juniper also enables easy migration with phased deployments. We uniquely allow you to design, manage, and concurrently support multiple network types as you introduce segment routing into your environment. With Juniper Paragon Pathfinder, you can run multiple control planes at the same time: segment routing over MPLS (SR-MPLS), Label Distribution Protocol (LDP), Resource Reservation Protocol (RSVP), and native IPv4 and IPv6.