Explains how interworking gateways extend Layer 3 services across SRv6 and MPLS domains while preserving reachability, forwarding behavior, service quality, and migration flexibility.
This chapter focuses on the crucial role of SRv6-MPLS L3 service interworking gateways in bridging disparate network domains, ensuring seamless service continuity between SRv6 and MPLS infrastructures. It details how these gateways facilitate the extension of L3 EVPN services, supporting migration strategies and enabling communication across domains with potentially different Segment Identifier (SID) formats. The chapter covers the operational mechanisms, benefits, and configuration of interworking gateways, including scenarios for dual-connected Provider Edges (PEs) and route re-origination for optimized scalability and interoperability.
SRv6 MPLS L3 service interworking gateway
Explains how an interworking gateway exchanges routes and stitches data-plane traffic between SRv6 and MPLS domains, supporting service continuity and network migration.
Interworking gateways for L3 EVPN SRv6 and L3VPN MPLS
Explains how gateways exchange and re-originate routes to extend Layer 3 EVPN services between SRv6 and MPLS domains and provides deployment and configuration guidance.
Layer 3 service gateway for interconnecting SRv6 domains
Explains how Layer 3 service gateways connect SRv6 domains through route re-origination, summarization, SID-format translation, and packet re-encapsulation.
SRv6 Layer 3 service gateway enhancements
Explains how service gateways preserve QoS and path visibility by propagating Traffic Class, DSCP, TTL, and ECN information across interconnected SRv6 domains.
SRv6 MPLS Dual-Connected PEs
Explains how dual-connected PEs provide IPv4 and IPv6 L3VPN services over both MPLS and SRv6 through coordinated label allocation, SID allocation, and route advertisement.