Using ndd (HPUX11) in replacement of nettune (HPUX10)

[Herve BRANGIER]

Hi

I'm looking for ndd (on HPUX 11.00 system)
equivalencies for we use on HPUX 10.20 system :

nettune -s tcp_keepstart=10
nettune -s tcp_keepfreq=5
nettune -s tcp_keepstop=10

Thx by advance

Herv?

[Praveen Bezawada]

Hi
You can try ndd -h
this displays all the suuported tunable and untunable parameters.

...BPK...

[rick jones · Accepted solution]

The ndd -h advice is good. Keep in mind that some things will not have direct translation. For example, the tcp_keepfreq and tcp_keepstop have no direct replacement in 11 as those are controlled like "normal" retransmission events.

There are two keepalive intervals in 11 - tcp_keepalive_interval which is what you are familiar with as tcp_keepstart when apps set SO_KEEPALIVE.

There is also tcp_keepalive_detached_interval which is used when TCP automagically initiates keepalive probes (regardless of an app setting SO_KEEPALIVE) after an app has called close() against a socket (and thus the TCP connection is "detached" from the user)

ftp://ftp.cup.hp.com/dist/networking/briefs/annotated_ndd.txt