[Linux-cluster] help understanding How service ip works

[Marc - A. Dahlhaus [ Administration | Westermann GmbH ]]

Hello,

Am Mittwoch, den 22.04.2009, 18:15 +0200 schrieb ESGLinux:
> WOW!
> 
> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
> qlen 1000
>     link/ether 00:0c:29:2a:02:db brd ff:ff:ff:ff:ff:ff
>     inet 192.168.1.195/24 brd 192.168.1.255 scope global eth0
>     inet 192.168.1.184/24 scope global secondary eth0
>     inet6 fe80::20c:29ff:fe2a:2db/64 scope link
>        valid_lft forever preferred_lft forever
> 
> here is the litle B.....!!!
> 
> 2 question brings to my mind.
> 
> first, why ipconfig dont show it?

Simple answer:

ipconfig is deprecated, doesn't support all functions of the linux
network stack and is in your distro just for stoneaged shellscript
compatibility purposes.

iproute2 is the interface one should use begining with kernel 2.4 if i
recall correctly. learn to use it and stick to it, its by far a better
pet than ipconfig ever was.

> 
> second, why hell I thought it was related to multicast???? I thought I
> have read about it anywhere...
> 
> 
> Thank you ALL for your help (again....)
> 
> ESG
> 
> 
> 2009/4/22 Gordan Bobic <gordan at bobich.net>
>         It has nothing to do with multicasting.
>         Try "ip addr".
>         
>         
>         On Wed, 22 Apr 2009 17:58:49 +0200, ESGLinux
>         <esggrupos at gmail.com> wrote:
>         > Hello all
>         >
>         > This is not a support question. Is about understanding how
>         the service ip
>         > works.
>         >
>         > I don´t understand where this ghost ip is. I can't see it
>         with ifconfig
>         in
>         > any of the nodes but it's there because it answers to my
>         packets.
>         >
>         > I think it´s related to multicasting but I don´t see how. I
>         can get the
>         > multicast ip of my nodes with, for example, cman_tool
>         status. But I can'
>         t
>         > get the service IP.
>         >
>         > I have read about multicast
>         ( http://www.firewall.cx/multicast-intro.php,
>         > http://www.tldp.org/HOWTO/Multicast-HOWTO.html) but dont see
>         the light.
>         >
>         > any resource(man page, howto, explanation...) is wellcome
>         >
>         > Thanks in advance
>         >
>         > ESG
>         
>         
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