topic Re: ndd command in Operating System - HP-UX

ndd command

Mridul Dutta — Tue, 20 Dec 2005 01:25:21 GMT

Hi friend,

i m confused in network parameter . is it same with network configuration?

i heard from one of friend is that "ndd" command is used for setting network parameter . is it for parmanent configuration? what is the configuration file for network parameter

Mridul

Re: ndd command

Dave Olker — Tue, 20 Dec 2005 01:37:57 GMT

Hi Mridul,

Ndd is a tool for configuring parameters specific to networking. There are many ndd-configurable parameters, although these are not the same as other kernel parameters that are set via adb or kctune.

If you heard about an ndd tunable parameter and you wish to set it at boot time, you can use the /etc/rc.config.d/nddconf file to configure this parameter to be set at system boot. You can also use the ndd command to manually set the parameter to a specific value while the system is running.

Do you have a question about a specific ndd parameter or are you asking about how to use the ndd command itself?

If you have questions about using ndd you can reference the ndd man page or documents on the docs.hp.com web site.

Regards,

Dave

Re: ndd command

Arunvijai_4 — Tue, 20 Dec 2005 01:38:01 GMT

"ndd" is used to tune and modify several network tunable parameters. # ndd -h will give you more information. Here is a link to a good doc, ftp://ftp.cup.hp.com/dist/networking/briefs/annotated_ndd.txt

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=17173

-Arun

Re: ndd command

RAC_1 — Tue, 20 Dec 2005 01:42:23 GMT

man ndd for details.

file /etc/rc.config.d/nddconf holds the setting information.

ndd -h supported
ndd -h unsupported

Re: ndd command

Muthukumar_5 — Tue, 20 Dec 2005 02:44:24 GMT

Nope. You have to configure in /etc/rc.config.d/nddconf file to make permanent setting. If you tune it with ndd then it is applicable to that session only.

see nddconf file and ndd man page.

-Muthu

Re: ndd command

YoungHwan, Ko — Tue, 20 Dec 2005 03:13:30 GMT

To modify ndd parameters
1. Use command
# ndd -set /dev/tcp tcp_time_wait_interval 60000
#ndd -set /dev/tcp keep_alive_interval 3600000 ===> Setting
#ndd -get /dev/tcp tcp_time_wait_interval
#ndd -get /dev/tcp keep_alive_interval ===> Confirm

2. Use file edit
# vi /etc/rc.config.d/nddconf
TRANSPORT_NAME[0]=tcp
NDD_NAME[0]=tcp_time_wait_interval
NDD_VALUE[0]=60000

TRANSPORT_NAME[1]=tcp
NDD_NAME[1]=keep_alive_interval
NDD_VALUE[1]=3600000
.
.
.