SunOS 4.1.x: How can I change default tcp/ip params.? (tcp_keepalive)
2007-12-25 9:10:00
Sorry for such long delay in writing the SUMMARY. The company I am
working at has been disconnected from provider for three weeks. So
I had to look through voluminous documentation and find appropriate
solution.
The only reply I have received was from Stefan Voss <s.voss@terradata.de>
--
He advised to look and edit file /sys/netinet/in_proto.c. There you find the
following parameters:
tcp_sendspace
tcp_recvspace
tcp_default_mss
tcp_ttl
and some others.
After modifying this file, you have to build a new kernel and reboot the
machine.
--
I manage Solbourne 700,900 servers running SunOS 4.1.2. And I found that
TCP parameters have to be specified in /usr/kvm/sys/netinet/in_proto.c, so
perhaps you will wish to make its original copy prior to editing one. The
following TCP parameters could be set here:
tcp_keeplen (1)
tcp_keepidle = 2-20 (14400 1/2sec)
tcp_keepintvl = 2-20 (150 1/2sec)
tcp_ttl = 30 (60 sec)
tcp_sendspace = 65535 (4096*4)
tcp_recvspace = 65535 (4096*4)
tcp_default_mss = 2048 (512 bytes)
After building the kernel you can always see the values in running system.
Regards,
Vitaly Beliaev
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Vitaly Beliaev: Unix systems administrator
JVSC MMK, RUSSIA
e-mail: vit@mmk.ru
voice: +7 (3511) 335639
if vegetarian prefers vegetables, then what's the snack for humanitarian?
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