December 2025 monthly summary for sonic-buildimage: Delivered a unified DHCP Relay Code Structure for IPv4/IPv6 to improve maintainability and reduce duplication across the DHCP relay component. The change lays groundwork for future parity between IPv4 and IPv6 paths and simplifies ongoing maintenance and bug fixes.

Month: 2025-11 — Delivered a focused, business-value-driven enhancement for sonic-mgmt by establishing a comprehensive DHCPv4 Relay Testing Strategy for ISC and SONiC relay agents. The initiative adds cross-agent compatibility validation across diverse network topologies, reducing the risk of relay-related regressions in production and accelerating validation ahead of releases.

2025-09 Monthly Summary: Delivered a new DHCPv4 Relay configuration model for SONiC OS, enabling model-driven management of relay settings across VRF, interfaces, and relay behavior; integrated into the build system to enable runtime configuration of DHCPv4 Relay.

In August 2025, delivered a comprehensive high-level design for a SONiC-native DHCPv4 relay agent to replace ISC-DHCP. The design addresses VLAN/VRF awareness, streamlined configuration, monitoring capabilities, Redis-DB integration for configuration and statistics, and EVPN topology support. This work provides a solid architectural foundation and a migration path to a scalable, observable DHCP solution. Commit reference included: f415128406f6baced4f3677665d5604618563a89 (DHCPv4 Relay Agent High Level Design #1938).

April 2025 performance summary: Strengthened network resilience and operational efficiency across SONiC platforms with targeted enhancements to ECMP hashing, dynamic nexthop management, and automated configuration tooling. Delivered documentation for a new prefix-based ECMP hashing mode, expanded the Fine-Grained Hashing (FGH) YANG model to support dynamic nexthop groups, and introduced auto-generated FG-NHG CLI to simplify lifecycle management of nexthop groups, prefixes, and members. These changes reduce manual configuration effort, improve routing stability, and enable dynamic, route-driven nexthop updates aligned with route changes.