CentOS - Aug 2016 - Gateway question

On 09/08/2016 15:47, Jonathan Billings wrote:
> On Tue, Aug 09, 2016 at 10:58:40AM +0300, Levente Birta wrote:
>> What I don't understand why the route command allow to add a second
default
>> gateway with different interface, but the ip route command doesn't?
> You can only have one default gateway.
>
> It sounds to me like you want to use both interfaces, which are both
> on the same subnet and would connect to the same gateway, as some sort
> of load-balanced network, where traffic is evenly distributed across
> both interfaces?  Or did I mis-read your initial question?
>
No, there is no load-balancing....
It is a server on the LAN with two NICs, two IPs and I want to access 
the internet on both interfaces ... which means, practically, different 
WAN connection, but from the server's point of view doesn't matter, the 
routing to different WAN is a job of gateway's.
And as I said in the initial message I achieved this ... :)
The question is how can I achieve this with more elegant way, because 
the "route" command is deprecated anyway.

So, again:
Centos 7
2 NICs
enp2s0-192.168.1.12
enp3s0-192.168.1.13
default gateway on enp2s0 is 192.168.1.1, defined in /etc/sysconfig/network

Which other way (preferred with "ip route") can I add this, but:
#route add default gw 192.168.1.1 dev enp3s0
????

Thanks
Levi

On 8/9/2016 11:42 AM, Birta Levente wrote:
> So, again:
> Centos 7
> 2 NICs
> enp2s0-192.168.1.12
> enp3s0-192.168.1.13
> default gateway on enp2s0 is 192.168.1.1, defined in 
> /etc/sysconfig/network
>
> Which other way (preferred with "ip route") can I add this, but:
> #route add default gw 192.168.1.1 dev enp3s0 
those are both the same network, and the default gateway is a global 
thing.  packets forwarded to 192.168.1.1 could use either 192.168.1.12 
or .13, as they are all the same.  in reality, they will use the first 
match they find.



-- 
john r pierce, recycling bits in santa cruz

On 08/09/2016 12:03 PM, John R Pierce wrote:
> those are both the same network, and the default gateway is a global 
> thing.  packets forwarded to 192.168.1.1 could use either 192.168.1.12 
> or .13, as they are all the same.  in reality, they will use the first 
> match they find. 

Generally, but not necessarily.  What Birta is trying to accomplish is 
called "multi-homing."   The oracle document I linked to is one of the
shortest, accurate descriptions of its configuration on Red Hat derived 
systems that I've come across.