Explains how SRv6 transports Layer 3 VPN and global routing services and guides users through deploying, interconnecting, and monitoring IPv4 and IPv6 services.
Segment Routing over IPv6 (SRv6) provides a scalable, flexible, and programmable framework for traffic engineering and service delivery within modern network architectures. This chapter functions as a foundational guide, detailing the principles and implementation procedures for core Layer 3 VPN (L3VPN) and global routing services leveraging SRv6.
SRv6 Layer 3 Services
Explains how SRv6 supports IPv4 and IPv6 Layer 3 services through BGP signaling, load balancing, MPLS interworking, route leaking, and Path MTU Discovery.
SRv6 BGP-Based Services
Explains how BGP advertises service SIDs for VPN and global routing services and describes the endpoint behaviors and allocation methods used to forward traffic.
IPv4 L3VPNs over SRv6
Explains how SRv6 transports IPv4 L3VPN traffic and provides guidance for configuring and verifying VPNv4 services, route leaking, SID allocation, and dual-stack operation.
IPv6 L3VPN services over SRv6 networks
Explains how BGP signals service SIDs for IPv6 L3VPNs and provides the restrictions, configuration, and verification needed to transport VPN traffic across an SRv6 core.
IPv4 BGP Global SRv6 services
Explains how SRv6 provides IPv4 global BGP services and describes the endpoint behaviors used to decapsulate and forward IPv4 traffic.
Configure BGP global IPv4 Over SRv6 with Per-CE SID allocation mode
Provides BGP configuration for allocating per-CE SIDs to IPv4 global routes and establishing SRv6 connectivity between BGP neighbors and customer-edge devices.
Configure per-VRF-46 label allocation mode
IPv6 BGP global SRv6 services
Explains how BGP signals IPv6 global services over SRv6 and describes the endpoint behaviors, SID allocation methods, restrictions, and configuration used for forwarding.
SRv6 double recursion for multilayer BGP underlay
Explains how double recursion resolves services across multiple routing layers and supports hierarchical load balancing in multilayer BGP underlay networks.
BGP SID locator tracking for SRv6 services
Explains how BGP monitors SRv6 locator reachability and metrics directly to improve service convergence, route processing, and forwarding reliability.