ADSM-L

Re: TcpOpen(): setsockopt(SO_SNDBUF): errno = 74

1997-02-17 13:30:29
Subject: Re: TcpOpen(): setsockopt(SO_SNDBUF): errno = 74
From: Andy Raibeck <araibeck AT VNET.IBM DOT COM>
Date: Mon, 17 Feb 1997 10:30:29 PST
Cheryl Blacher asks:

>Hello,
>The following error comes up in many of my error logs, all the time.
>Can anyone tell me where to start?

>02/17/97   00:35:20  TcpOpen(): setsockopt(SO_SNDBUF): errno = 74
>02/17/97   00:35:20  TcpOpen(): setsockopt(SO_RCVBUF): errno = 74
>02/17/97   00:35:20  TcpOpen(): setsockopt failed on one or more options

Hello Cheryl,

You're TCPWINDOWSIZE setting is too high. I don't know about other UNIX
platforms, but on AIX, the "sb_max" setting dictates the highest TCPWINDOWSIZE
you can use. If it's AIX, you can check "sb_max" by issuing the "no -a"
command. TCPWINDOWSIZE must no greater than "sb_max". So you can either
increase "sb_max" or decrease TCPWINDOWSIZE. Note that "sb_max" is expressed
in bytes and TCPWINDOWSIZE is expressed in KB. So if "sb_max" shows as
65535, then TCPWINDOWSIZE must be 64 or less.

Hope that helps,

Andy Raibeck
ADSM Level 2 Support
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