YANG Modules 2017-10-25 See Address Family Numbers and Subsequent Address Family Identifiers (SAFI) Values registries. Address Families and Subsequent Address Families must not be directly added to the iana-routing-types YANG module. They must instead be respectively added to the Address Family Numbers and Subsequent Address Family Identifiers (SAFI) Parameters registries. Module: iana-routing-types@2025-09-03.yang