I

_icmp_err_burst, _icmp_err_interval and _icmp_err_burst

_icmp_err_interval, _icmp_err_interval and _icmp_err_burst

_icmp_return_data_bytes, _icmp_return_data_bytes（ipv4 或 ipv6）

_ignore_path_mtu, _ignore_path_mtu

inetinit, inetinit

init, init

_initial_mtu, _initial_mtu

_initial_out_streams, _initial_out_streams

_initial_ssthresh, _initial_ssthresh

intr_force, intr_force

intr_throttling, intr_throttling

_ip_abort_interval, _ip_abort_interval

ip_squeue_fanout, ip_squeue_fanout

ip_squeue_worker_wait, ip_squeue_worker_wait

ipcl_conn_hash_size, ipcl_conn_hash_size

ipsec, ipsec

_ipv4_ttl, _ipv4_ttl

_ipv6_hoplimit, _ipv6_hoplimit