LinuxQuestions.org

LinuxQuestions.org (/questions/)
-   Linux - Networking (https://www.linuxquestions.org/questions/linux-networking-3/)
-   -   difference ifconfig up and ifup (https://www.linuxquestions.org/questions/linux-networking-3/difference-ifconfig-up-and-ifup-768863/)

fawrell 11-13-2009 04:04 AM
difference ifconfig up and ifup
 
Hey.

Can anyone pls explain me what is the difference between bringing network interfaces up and down with ifup and ifdown and with ifconfig up/down?

And why ifconfig wiped my routing tables after changing netmask address with it? I'm using RHEL 4.

Tnx for answers!

pixellany 11-13-2009 06:02 AM
http://man-wiki.net/index.php/8:ifup

Google finds many others....

If I understand correctly, ifup and ifdown affect all interfaces, whereas ifconfig must be told which one.

fawrell 11-13-2009 06:49 AM
Quote:
Originally Posted by pixellany (Post 3755408)
ifup and ifdown affect all interfaces, whereas ifconfig must be told which one.
Definitely not. Easy test:

[root@localhost]# /sbin/ifup
Usage: ifup <device name>

On both you have to specify interface. And both are affecting (shutting down, starting up) only that specified interface.

pixellany 11-13-2009 07:00 AM
Sorry--perhsps I misread something in one of the links I found. You now know more than I do.....:)

My system does not have ifup and ifdown and I never have an issue just using ifconfig.

kanishka.dutta 12-06-2012 05:15 AM
Quote:
Originally Posted by fawrell (Post 3755492)
Definitely not. Easy test:

[root@localhost]# /sbin/ifup
Usage: ifup <device name>

On both you have to specify interface. And both are affecting (shutting down, starting up) only that specified interface.
I would also like to know the difference between ifconfig up and ifup. How do they both behave different internally? Can you please explain?


All times are GMT -5. The time now is 07:08 PM.