Problem

[Luis Hétor Desachy]

Hi,
ndd -get /dev/tcp tcp_status
returns:
operation failed, Invalid argument

HPUX 11i SD32000
Maybe anyone knows why?

LHDG
Mex.

[Bharat Katkar]

It works perfectly with me... is their any typo or control char getting in..

Give it a try once..
Regards

[Dave Olker]

Works fine on my 11i box, both as a normal user and root user.

Is it repeatable on your system?

Dave

[Patrick Wallek]

It works for me as well. Maybe you need to patch ndd?

Here's the what output for my ndd.

# what $(whence ndd)
/usr/bin/ndd:
ndd.c $Date: 2002/04/25 15:52:31 $Revision: r11.11/6 PATCH_11.11 (PHNE_26762)
nddconfig.c $Date: 2002/10/09 04:10:13 $Revision: r11.11/9 PATCH_11.11 (PHNE_27989)
errmsg.c $Date: 2001/04/16 12:04:37 $Revision: r11.11/1 PATCH_11.11 (PHNE_23645)
fatal.c $Date: 2001/04/16 12:05:30 $Revision: r11.11/1 PATCH_11.11 (PHNE_23645)
progname.c $Date: 2001/04/16 12:08:08 $Revision: r11.11/1 PATCH_11.11 (PHNE_23645)
usage.c $Date: 2001/04/16 12:08:27 $Revision: r11.11/1 PATCH_11.11 (PHNE_23645)
warn.c $Date: 2001/04/16 12:08:48 $Revision: r11.11/1 PATCH_11.11 (PHNE_23645)

[Luis Hétor Desachy]

I have a two box and in one box works very well and the second box returns: operation failed, Invalid argument

The box are same in configuration.

Maybe anyone knows why?

[Dave Olker · Accepted solution]

Hello Luis,

Ok, I think I understand why ndd is failing on one of your systems. My guess is you have too many TCP connections for ndd to display and it is exceeding the limits specified by your STRMSGSZ variable.

On a typical system, ndd can display ~400 TCP connections with STRMSGSZ set to 64K. On systems with many more connections, which you can confirm via:

# netstat -an | wc -l

the amount of information required to display the statistics for these connections won't fit into a STRMSGSZ buffer and therefore ndd fails.

The solution for this is to use a higher value for STRMSGSZ, or set this parameter equal to 0 (unlimited).

Please check what value you're using for STRMSGSZ on your systems. Also check how many connections netstat -an reports. If it is more than 400, then this is likely a candidate for STRMSGSZ adjustment.

Hope this helps,

Dave