OpenBGPD 9.1 released

Every spring and autumn, the routing world can expect a new OpenBGPD release, and this time is no exception.

The OpenBGPD project have announced the availability of their newest release, version 9.1, with the following announcement:

List:       openbsd-announce
Subject:    OpenBGPD 9.1 released
From:       Claudio Jeker <claudio () openbsd ! org>
Date:       2026-04-13 14:37:12

We have released OpenBGPD 9.1, which will be arriving in the
OpenBGPD directory of your local OpenBSD mirror soon.

This release includes the following changes to the previous release:

    * Improve outbound filter performance by storing the rules in
      an array and also deduplicate equal filters accross peers. 
      This and the filter_set change reduce the initial sync duration of
      large route servers by more than 25%.

    * Improve performance of filter_sets processing in the RDE process
      by moving to a linear array of set objects to reduce cache misses.

    * Add better logging for attribute parse errors which cause a
      session reset via UPDATE ATTRLIST error notification.

    * Introduce various additional memory metrics which are part
      of the 'show rib memory' command. Some values are also tracked
      per-neighbor and visible via 'show neighbor'.

    * Fix logic error when handling per-peer and per-group MRT message
      dump configurations.

OpenBGPD-portable is known to compile and run on FreeBSD and the
Linux distributions Alpine, Debian, Fedora, RHEL/CentOS and Ubuntu.
It is our hope that packagers take interest and help adapt OpenBGPD-portable
to more distributions.

We welcome feedback and improvements from the broader community.
Thanks to all of the contributors who helped make this release
possible.

As regular readers will be aware, this code will be part of the upcoming OpenBSD 7.9 release, expected within weeks now.