Using New Bridges of FreeBSD 15

2 days ago

FreeBSD 15 introduces a new bridging implementation with native VLAN support.
The new bridging behaves like a hardware switch by soft-deprecating layer 3 addresses on member interfaces.
A sysctl, net.link.bridge.member_ifaddrs, controls this behavior and will be removed in FreeBSD 16.0-RELEASE.
The new implementation optimizes packet processing and allows a single bridge for all VLANs, improving performance.
Old bridging required separate bridges for each VLAN, leading to messy configurations.
New bridging simplifies VLAN management by allowing tagged and untagged VLANs on a single bridge.
VNET jails previously relied on an unofficial script (jib) for epair device creation, which is now outdated.
A new script was created to handle stable epair device names and VLAN tagging for VNET jails.
Bhyve VMs currently lack native support for the new bridging, requiring manual tap interface management.
Future updates may provide better solutions for Bhyve VM networking with the new bridging.

Hasty Briefsbeta