return clib_error_return (0, "no routable ip6 addresses on %U",
format_vnet_sw_if_index_name,
vnet_get_main (), sw_if_index);
return clib_error_return (0, "no routable ip6 addresses on %U",
format_vnet_sw_if_index_name,
vnet_get_main (), sw_if_index);