June 2026 monthly summary: Delivered VRF-aware enhancements across Sonic utilities, buildimage, and management modules, enabling automatic restart of gNMI and Telemetry services on VRF changes, VRF-bound service configuration, and expanded VRF testing coverage. These changes improve operational reliability, reduce manual intervention, and give operators precise control over VRF binding for gNMI and Telemetry. All changes include validators, YANG model updates, and test coverage, with CI validating across multiple VRFs, contributing to safer deployments and faster change windows.

Month: 2026-05: System stability improvement in sonic-buildimage by replacing FD_SET/select() with poll() to handle high FD counts safely. This patch preserves original read-readiness wait semantics and timeout behavior while eliminating FD_SETSIZE-related aborts in glibc environments. Implemented across cli_usock_wait_recv and team_check_events; tied to commit 24fbd2ab6146e2354d720260997dee3920499012. Verified by running high-scale portchannel scenarios on DUTs; regression tests show no failures under large FD usage. This work reduces outages and restarts of teamsyncd/teamd, improving reliability of LAG synchronization and overall system stability.