OpenBSD: All relevant options are enabled in the GENERIC kernel. No further (non-pf.conf) configuration necessary
FreeBSD: The GENERIC kernel does not have ALTQ options enabled. Relevant options are
options ALTQ options ALTQ_CBQ # Class-Based Queuing (CBQ) options ALTQ_RED # Random Early Detection (RED) options ALTQ_RIO # RED In/Out options ALTQ_HFSC # Hierarchical Packet Scheduler (HFSC) options ALTQ_PRIQ # Priority Queuing (PRIQ) options ALTQ_NOPCC # Required for SMP buildo
Enable the options you need in your kernel config, install the kernel
NetBSD: ALTQ available in NetBSD 4.0; The GENERIC kernel does not have ALTQ options enabled. Relevant options are
options ALTQ # Manipulate network interfaces' output queues options ALTQ_CBQ # Class-Based Queuing options ALTQ_HFSC # Hierarchical Fair Service Curve options ALTQ_PRIQ # Priority Queuing options ALTQ_RED # Random Early Detection
Enable the options you need in your kernel config, install the kernel