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Status Not under consideration
Workspace AIX
Created by Guest
Created on Oct 24, 2017

RELATED IDEAS

AIX tcp_keepidle default for keep alive packets

Hi IBM,

The default setting for tcp_keepidle is 14400. This equals 2 hours between keep alive packets for idle connections. Most firewalls default to 1 hour before they terminate idle connections.

Would you consider reducing the tcp_keepidle to 1800 which would then send keep alive packets every 30 minutes on idle connections.

Idea priority Medium
  • Guest
    Reply
    |     Jan 10, 2018

    While changing the defaults may help one customer, other customers may well be surprised if we change the default value of tcp_keepidle. As stated before, use

    no -po tcp_keepidle=7200

    to set the initial idle timeout to 2 hours (7200 half-seconds)

  • Guest
    Reply
    |     Dec 4, 2017

    Hi IBM,

    Apologies for the typo, yes 1800 is in fact 15 minutes.
    As long as the new default is less than 1 hour it should fix the issue where firewalls timeout connections after 1 hour.
    Perhaps a new default setting of 3600 to make it 30 minutes between keep alives would be better.

  • Guest
    Reply
    |     Dec 4, 2017

    You can change "tcp_keepidle" using the "no" command:

    # no -po tcp_keepidle=1800

    (which is 15 minutes, not 30, since these are half-seconds)

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