Routing package development team OpenBGPD released on April 13, 2026 OpenBGPD 9.1. The developers also remind that besides OpenBSD, OpenBGPD-portable works on FreeBSD and Linux distributions Alpine, Debian, Fedora, RHEL/CentOS, and Ubuntu.
What's new in OpenBGPD 9.1
- improved outbound filter processing by storing rules in an array and deduplicating identical filters between peers;
- enhanced error logging for parsing attributes that trigger session reset via UPDATE ATTRLIST error notification;
- new memory metrics added for show rib memory, some of which are also available in show neighbor;
- fixed a logical error in handling MRT dump configurations for per-peer and per-group.
The main focus of OpenBGPD 9.1 is not on expanding the feature set but on enhancing performance in high-load scenarios. The outbound filters: rules are now stored in an array, and identical filters between neighbors are deduplicated. According to the project's authors, together with changes in filter_set, this reduces the duration of the initial synchronization on large route servers by over 25%.
Improved processing of filter_sets during the RDE. The project abandoned the previous scheme in favor of a linear array of set objects to reduce the number of cache misses and thus speed up route processing through the filtering policy. For network operators, this essentially means a continuation of the optimization course for OpenBGPD under heavy configurations and intensive BGP scenarios, where not only correctness but also predictable behavior under load is important.
Another notable change concerns observability. OpenBGPD 9.1 has added new memory metrics, accessible via the show rib memory command; some of this data is now also tracked per neighbors and displayed via show neighbor. Simultaneously, error logging has been improved for parsing attributes that can lead to BGP session resets with notifications UPDATE ATTRLIST error. This makes diagnosing issues in session and route functionalities more transparent.
Källa: linux.org.ru
