It should only be a problem setting the tcp_wait_timeout to 1000 or 1
second if you have Oracle backups or other DB type extensions. In that
case, use 6000 or 6 seconds. The default is Solaris 2.5 was 1 second and
did cause problems in the Oracle world. 

-----Original Message-----
From: william.d.brown AT gsk DOT com [mailto:william.d.brown AT gsk DOT com] 
Sent: Thursday, March 18, 2004 11:37 AM
To: Veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Is there an official document of client and
server N ICand switch settings

Well Veritas recommend it be set to as low as 1000:

<<

TCP_CLOSE_WAIT_INTERVAL

For Solaris 2.6 or previous use the following command:
ndd -get /dev/tcp tcp_close_wait_interval

For Solaris 7 or above use the following command:
ndd -get /dev/tcp tcp_time_wait_interval

For HP-UX 11 use the following command:
ndd -get /dev/tcp tcp_time_wait_interval

(NOTE: The equivalent command on HP-UX 10 is "nettune" instead of
"ndd".)
These commands will produce a large number, like the default 240000
(value 
is in
milliseconds, so 240 seconds or 4 minutes). This is the amount of time
to 
wait after a
socket is closed before it can be reused. In most cases this can be 
shortened to about 1
second (1000).

The command to set it to 1000 on Solaris 2.6 and previous versions is:
ndd -set /dev/tcp tcp_close_wait_interval 1000

The command to set it to 1000 on Solaris 7 and later versions is:
ndd -set /dev/tcp tcp_time_wait_interval 1000

The command to set it to 1000 on HP-UX 11 is:
ndd -set /dev/tcp tcp_time_wait_interval 1000

The "ndd" command makes the change immediately, without a need for a 
reboot. This
setting will go back to default after a reboot. To make the OS set to
this 
value after each
reboot, the command can be added to the appropriate TCP/IP startup
script. 
On Solaris,
this is /etc/rc2.d/S69inet. On HP-UX 11 see /etc/rc.config.d/nddconf for

examples of how
to set it.

>>

NCVU will check this and complain if it is too high.

William D L Brown


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