topic Network Tunable Parameter in Operating System - HP-UX

Network Tunable Parameter

David Santoro_1 — Fri, 04 Apr 2008 13:41:23 GMT

SYSTEM: HP-UX 11.23

Issue:

On my HP 11.23 systems I manually run the command to check this value:

# ndd /dev/tcp tcp_isn_passphrase

The value returned is 1 which indicates this parameter is enabled.

The nddconf file on this system the value is displaying 0

TRANSPORT_NAME[4]=tcp
NDD_NAME[4]=tcp_isn_passphrase
NDD_VALUE[4]=0

Question

Does the nddconf value related to the value returned from the ndd command?

I have changed the value in the config file and the returned value from the ndd /dev/tcp tcp_isn_passphrase remains 1.

In other words where does the 1 value originate from?

Re: Network Tunable Parameter

Laurent Menase — Fri, 04 Apr 2008 17:23:22 GMT

Once set tcp_isn_passphrase is set and can't be reset.
When you put
TRANSPORT_NAME[4]=tcp
NDD_NAME[4]=tcp_isn_passphrase
NDD_VALUE[4]=0
in nddconf, it will use the passphrase to "0"

Rem: the consult command is
ndd -get /dev/tcp tcp_isn_passphrase

Re: Network Tunable Parameter

Laurent Menase — Fri, 04 Apr 2008 17:24:51 GMT

so to avoid to set a isn passphrase, you must remove tcp_isn_passphrase configuration in nddconf