topic Re: Getting network card MTU using ioctl in Operating System - HP-UX

Getting network card MTU using ioctl

Prakash Achuthan — Mon, 28 Jan 2002 12:56:50 GMT

Hi,

How do i get the MTU of my network interface card using ioctl ?
I tried a lot but I could get it right.

This is the first time I am using ioctl.

Thanks in advance,
Prakash

Re: Getting network card MTU using ioctl

James R. Ferguson — Mon, 28 Jan 2002 13:04:33 GMT

Hi:

If you want to interrogage the MTU networking size:

# lanadmin -m [ppid|nmid]

If you want to set it (by lan):

# lanadmin -M 1500 [ppid|nmid]

Regards!

...JRF...

Re: Getting network card MTU using ioctl

Prakash Achuthan — Mon, 28 Jan 2002 13:12:08 GMT

Hi,

I want to do it from within my C++ code using ioctl sys call.

Thanks,
Prakash

Re: Getting network card MTU using ioctl

harry d brown jr — Mon, 28 Jan 2002 15:16:13 GMT

The Document

http://www.docs.hp.com/hpux/pdf/B2355-90669.pdf

has a structure called hw_ift_t which contains mtu size.

live free or die
harry

Re: Getting network card MTU using ioctl

Pal Szabo_1 — Mon, 28 Jan 2002 15:23:15 GMT

Hi!

I suggest using DLPI
http://docs.hp.com/hpux/onlinedocs/B2355-90139/B2355-90139.html

The DL_HP_PPA_ACK primitive is used to query the networking information of the card.

I suggest to aviod using ioctl system call,because
DLPI is an industry standard
and use only one devices file,

But if you want to use it
try this:
LLA to DLPI migration guide
ioctl requests

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90138/B2355-90138_top.html&con=/hpux/onlinedocs/B2355-90138/00/00/7-con.html&toc=/hpux/onlinedocs/B2355-90138/00/00/7-toc.html&searchterms=DLPI&queryid=20020128-071716

Sample program:
http://docs.hp.com/cgi-bin/onlinedocs.py?mpn=B2355-90138&service=hpux&path=../B2355-90138/00/00/12&title=LLA%20to%20DLPI%20Migration%20Guide

Regards:
Paul