[CentOS] more than one IP address on network device?

[Jon LaBadie]

Valeri,

not on list as it does not pertain to Linux.


On Sun, Sep 04, 2016 at 10:25:23AM -0500, Valeri Galtsev wrote:
> 
...
> > IPADDR2=192.168.1.10
> > BROADCAST2=192.168.1.255 <--
> > NETMASK2=255.255.255.0
> > NETWORK2=192.168.1.0 <--
> > GATEWAY2=192.168.1.1 <--
> 
> Interesting... With these settings, namely GATEWAY2=..., how the
> arbitration is done (in networks stack) which of gateways is used for
> packets to be sent outside of networks the machine is on?
> 
> As far as I know FreeBSD, there can be only one gateway (BTW, synonym:
> default gateway). Theoretically, the machine can have more than one
> gateway, but for that you need to have specially configured firewall/nat.
> Is this somehow different in Linux, and Linux does that auto-magically?
> 

Decades ago, I was running Solaris x86 at home.  My internet connection
was a 24/7 14.4KBaud phone connection to my ISP.  I then added my first
broadband cable connection.  During the transition I investigated dual
gateways.  At that time, Solaris just alternated between the two.  It
wasn't load balancing, and once a connection was made it stayed with
that interface if it was up.  Just new connections alternately were
sent via one or the other gateway interfaces.

Jon
-- 
Jon H. LaBadie                 jon at jgcomp.com
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