binary API call ip_address_dump  always returns an empty details response here is how to reproduce it using vat: Create any interface with ip address vat# vat# memif_create created memif with sw_if_index 1 vat# vat# sw_interface_add_del_address sw_if_index 1 10.0.0.1/24 vat# In VPP: vpp# sh int addr local0 (dn): memif0/0 (dn): L3 10.0.0.1/24 vpp# Try to dump ip address vat# vat# ip_address_dump ipv4 sw_if_index 1 ip address details arrived but not stored ip_dump should be called first   vat# Ok let's do that vat# vat# ip_dump ipv4 vat# vat# ip_address_dump ipv4 sw_if_index 1 vat# But nothing was returned. vpp# sh ver vpp v18.07-rc0~361-g3337bd22