I have a server with 2 nics (interfaces) running ubuntu 14.10
I need to connect each nic to a different router (each being a gateway to different internet connections from different ISPs.
I also need the server to respond to requests from the same nic the request arrived from Requests from the server (update system etc) can go through either nic (load balance?)
So far whatever way i try it always comes back as only one nic works as any request from the other nic (aapparently) gets the response sent on the first and so the requester doesn't get the answer
Everytime i restart seems a different nic works and that doesn't work for me
Here's what i want
--[ISP1]-----------------| | |
|-----------------{NIC1]| |
| server |
|-----------------[NIC2]| |
--[ISP2]-----------------| | |
And here's my routing settings
route -n
Destino Roteador MáscaraGen. Opções Métrica Ref Uso Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 1 0 0 em1
0.0.0.0 192.168.0.1 0.0.0.0 UG 2 0 0 em2
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 em2
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 em1
netstat -rn
Destino Roteador MáscaraGen. Opções MSS Janela irtt Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 em1
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 em2
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 em2
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 em1
after following @PedroPerez instructions i get:
route -n
Destino Roteador MáscaraGen. Opções Métrica Ref Uso Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 em1
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 em2
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 em1
netstat -rn
Destino Roteador MáscaraGen. Opções MSS Janela irtt Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 em1
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 em2
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 em1
ip route show
default via 192.168.1.1 dev em1
192.168.0.0/24 dev em2 proto kernel scope link src 192.168.0.123
192.168.1.0/24 dev em1 proto kernel scope link src 192.168.1.123
ip route show table NOS
default via 192.168.1.1 dev em1
192.168.1.0/24 dev em1 scope link src 192.168.1.123
ip route show table Vodafone
default via 192.168.0.1 dev em2
192.168.0.0/24 dev em2 scope link src 192.168.0.123
Still only one address responds from outside