E.5 AIX 3.2.2

E.5 AIX 3.2.2

AIX 3.2.2 allows network options to be set at runtime using the no command. It can display the value of an option, set the value of an option, or set an option value back to its default. For example, to display an option we type:

 aix %  no -o udp_ttl  udp_ttl = 30 

The following options can be modified.

arpt_killc

The time (in minutes) before an inactive completed ARP entry is removed. Default is 20.

ipforwarding

If 1 (default), IP datagrams are always forwarded. If 0, forwarding is disabled.

ipfragttl

The time to live (in seconds) for IP fragments awaiting reassembly. Default is 60.

ipsendredirects

If 1 (default), the host will send ICMP redirects when forwarding IP datagrams. If 0, ICMP redirects are not sent.

loop_check_sum

If 1 (default), the IP checksum is calculated for datagrams sent through the loop-back interface. If 0, this checksum is not calculated.

nonlocsrcroute

If 1 (default), received datagrams containing a source route option are forwarded. If 0, these datagrams are discarded.

subnetsarelocal

If 1 (default), a destination IP address with the same network ID as the sending host but a different subnet ID is considered local. If 0, only destination IP addresses on an attached subnet are considered local. This is summarized in Figure E.1. When sending to local destinations, TCP chooses the MSS based on the MTU of the outgoing interface. When sending to nonlocal destinations, TCP uses the default (536) as the MSS.

tcp_keepidle

Number of 500-ms clock ticks before sending a keepalive probe. Default value is 14400 (2 hours).

tcp_keepintvl

Number of 500-ms clock ticks between successive keepalive probes, when no response is received. Default value is 150 (75 seconds).

tcp_recvspace

The default size of the TCP receive buffer. This affects the window size that is offered . Default value is 16384.

tcp_sendspace

The default size of the TCP send buffer. Default value is 16384.

tcp_ttl

The default value for the TTL field for TCP segments. Default value is 60.

udp_recvspace

The default size of the UDP receive buffer. The default is 41600, allowing for 40 1024-byte datagrams.

udp_sendspace

The default size of the UDP send buffer. Defines the maximum UDP datagram that can be sent. Default is 9216.

udp_ttl

The default value for the TTL field in UDP datagrams. Default value is 30.



TCP.IP Illustrated, Volume 1. The Protocols
TCP/IP Illustrated, Vol. 1: The Protocols (Addison-Wesley Professional Computing Series)
ISBN: 0201633469
EAN: 2147483647
Year: 1993
Pages: 378

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