Routing Package Development Team OpenBGPD On April 13, 2026, a release was published OpenBGPD 9.1The developers separately remind that in addition to OpenBSD, OpenBGPD-portable works for FreeBSD and Linux distributions Alpine, Debian, Fedora, RHEL/CentOS and Ubuntu.
What's in OpenBGPD 9.1
- The processing of outbound filters has been accelerated by storing rules in an array and deduplicating identical filters between peers;
- Improved logging of attribute parsing errors that cause a session reset via the UPDATE ATTRLIST error notification;
- New memory metrics have been added to show rib memory, some of which are also available in show neighbor;
- Fixed a logical error in processing MRT dump configurations for per-peer and per-group.
The main focus of OpenBGPD 9.1 is not on expanding the feature list, but on improving the performance in high-load scenarios. outgoing filters: Rules are now stored in an array, and identical filters between neighbors are deduplicated. According to the project's authors, together with changes to filter_set, this reduces the initial synchronization time on large route servers by more than 25%.
Improved processing filter_sets during RDE extensionThe project abandoned the previous scheme in favor of a linear array of set objects to reduce cache misses and thereby speed up route passing through the filtering policy. For network operators, this essentially means continuing the path to optimizing OpenBGPD for complex 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 adds new memory metrics, available through the show rib memory command; some of this data is now also monitored by neighbors and is displayed via show neighbor. At the same time, logging of attribute parsing errors, which can lead to a BGP session reset with a notification, has been improved. UPDATE ATTRLIST errorThis makes diagnosing problems with sessions and routes more transparent.
Source: linux.org.ru
