Network configuration in FreeBSD

[Jerry McAllister]

On Wed, Jan 30, 2008 at 12:19:33PM -0500, Bhuvaneswari Ramkumar wrote:

> ifconfig em0 up also doesnt help ping my LAN.
> 
> the ifconfig -a output now reads the IP I just added, as well as the
> net-mask & the 100 Mbps active linnk.
> 
> quick question :
> 
> I did an ifconfig em0 1.1.1.2  yday.should this be done everytime I restart
> my application, is it some kind of a temporary address assignment, bcos
> whatever I assigned was not visible today when I re-booted and I had to do
> it again, probably I should set this in the conf file also ? maybe as
> another user said my NIC is not enabled or something like that.

You have to put it in /etc/rc.conf so it will be taken care of during
network initialization each time you boot.     Everything at startup
reads the /etc/rc.conf and finds variables it needs to do its startup
and network startup does that too.   So, you put in a line like:

  ifconfig_em0="inet 1.1.1.2  netmask 255.255.255.0"
and
  defaultrouter="1.1.1.3"

Amongst a number of other startup settings in /etc/rc.conf

network startup sees those and says 'oh, I know what to do with those'
and runs the ifconfig, etc.   
Note that putting it in rc.cong only causes a 'ifconfig_em0' variable 
to be set to    "inet 1.1.1.2  netmask 255.255.255.0"
and the 'defaultrouter' variable to be set to "1.1.1.3"
It is up to the startup programs to do something about it.

The startup programs are generally run from the /etc/rc script and
from other scripts that it runs.

////jerry

> 
> 
> On Wed, Jan 30, 2008 at 12:14 PM, ???????????? Ashish <wahjava.ml at gmail.com> wrote:
> 
> > ,--[ On Wednesday 30 Jan 2008, Bhuvaneswari Ramkumar wrote:
> > | I did have an IP address assigned to my ethernet interface( using the
> > | ifconfig command)  but I'm unable to ping anybody in my LAN.
> >
> > In the 'ifconfig -a' output you posted earlier, the 'em0' (your desired
> > interface) interface neither has any IP address assigned to it, nor its UP
> > .
> > So, if you've assigned an IP address to 'em0', then also make sure its UP,
> > by
> > doing 'ifconfig em0 up' .
> >
> > HTH
> > --
> > Ashish Shukla ???????????? ???????????????
> > http://wahjava.wordpress.com/
> > ·-- ·- ···· ·--- ·- ···- ·- ·--·-· --· -- ·- ·· ·-·· ·-·-·- -·-· --- --
> >

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