Custom maintenance units with per-interface-type profiles (e.g., different shutdown behavior for L2 vs L3 ports) previously required manual tracking and updating of BGP VRF groups whenever VRFs were added or deleted. The System unit auto-includes all AllBgpNeighborVrf-* groups dynamically. However, it cannot be used when granular interface profiles are required, as a single profile is applied to all ports.

A new CLI command group auto bgp builtin enables a custom unit to behave like the System unit for BGP VRF group auto-inclusion: all builtin BGP VRF groups (AllBgpNeighborVrf-<vrf>) are automatically added to the unit and kept in sync as VRFs are created or deleted.