OcNOS 6.6.1 LTS
OcNOS 6.6.1 is the designated Long-Term Support release of the 6.6 series, recommended for operators that prioritize stability over feature velocity. Five years of security patches and maintenance fixes from GA date. Already deployed across multi-thousand-node Tier-1 backbones. The 6.6.1 LTS branch consolidates the foundational SR-MPLS, EVPN, and Flex-Algo improvements introduced in OcNOS 6.6 (Maintenance) — operators standardizing on this LTS gain access to the same documentation library as the 6.6 GA release.
Major additions in this release
BGP-LU FRR convergence
Sub-second BGP-LU Fast Reroute convergence with prefix-independent backup paths. Validated at 4M-route scale on edge platforms.
EVPN-VPWS scale enhancements
32K-attachment-circuit support per leaf with hierarchical service-path computation. Reduces RIB churn during fabric maintenance windows.
Hardened TACACS+/RADIUS
Server-list failover hardening, encrypted shared-secrets at rest, and per-command authorization caching for low-latency operator workflows.
Deep dives, blogs, and press
Engineering perspectives and announcements that complement this release.