HP-UX TCP/IP Performance White Paper, March 2008

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Table 2: Operating System Support for TCP/IP Tunables
Table 2 provides the following information about which versions of the operating system support the TCP/IP
tunables described in this document.
• An * (asterisk) specifies that the version supports the tunable and does not require any patch.
• A - (dash) specifies that the version does not support the tunable.
Tunable Name 11i v1 11i v2 11i v3
TCP:
tcp_conn_request_max * * *
tcp_cwnd_initial * * *
tcp_deferred_ack_max * * *
tcp_delay_final_twh_ack Patch Level
PHNE_35351 or
higher
Patch Level
PHNE_35765 or
higher
*
tcp_early_conn_ind Patch Level
PHNE_28089 or
higher
* *
tcp_fin_wait_2_timeout * * *
tcp_frto_enable Patch Level
PHNE_35351 or
higher
Patch Level
PHNE_35765 or
higher
*
tcp_ip_abort_cinterval * * *
tcp_ip_abort_interval * * *
tcp_ip_notify_cinterval * * *
tcp_ip_notify_interval * * *
tcp_ip_ttl * * *
tcp_keepalive_detached_interval * * *
tcp_keepalive_interval * * *
tcp_largest_anon_port * * *
tcp_recv_hiwater_def * * *
tcp_recv_hiwater_max * * *
tcp_recv_hiwater_lfp * * *
tcp_recv_hiwater_lnp * * *
tcp_rexmit_interval_initial * * *
tcp_rexmit_interval_initial_lnp * * *
tcp_rexmit_interval_max * * *