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.
The time (in minutes) before an inactive completed ARP entry is removed. Default is 20.
If 1 (default), IP datagrams are always forwarded. If 0, forwarding is disabled.
The time to live (in seconds) for IP fragments awaiting reassembly. Default is 60.
If 1 (default), the host will send ICMP redirects when forwarding IP datagrams. If 0, ICMP redirects are not sent.
If 1 (default), the IP checksum is calculated for datagrams sent through the loop-back interface. If 0, this checksum is not calculated.
If 1 (default), received datagrams containing a source route option are forwarded. If 0, these datagrams are discarded.
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.
Number of 500-ms clock ticks before sending a keepalive probe. Default value is 14400 (2 hours).
Number of 500-ms clock ticks between successive keepalive probes, when no response is received. Default value is 150 (75 seconds).
The default size of the TCP receive buffer. This affects the window size that is offered . Default value is 16384.
The default size of the TCP send buffer. Default value is 16384.
The default value for the TTL field for TCP segments. Default value is 60.
The default size of the UDP receive buffer. The default is 41600, allowing for 40 1024-byte datagrams.
The default size of the UDP send buffer. Defines the maximum UDP datagram that can be sent. Default is 9216.
The default value for the TTL field in UDP datagrams. Default value is 30.