Tell me more ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.
up vote 5 down vote favorite

I am using 3 ethernet interfaces on Ubuntu but when I restart, the default gateway is changing to a different interface. Each time I boot I have to change default gateway back to the eth1 by deleting the default gateway and adding it back with eth1. How can I fix this problem?

share|improve this question
Have you configured it manually using the /etc/network/interfaces file, or a with software like Network Manager or wicd? – Lekensteyn Mar 23 '11 at 12:56
"Gateway" is not equal to "route". A gateway is specific to an interface where an route says which interface should be used. – Lekensteyn Jun 2 '11 at 19:24
The gateway is usually an interface on a remote device which the local node is relying on for routing decisions. A route statement itself can refer to a local interface or not, but the routing destination has to be discoverable from a recursive lookup, connected interface, or default route. A default route or default gateway is the 'gateway of last resort' -- which will be used in the absence of a more specific route being available. – belacqua Oct 29 '11 at 22:14
Can you provide your routing table and list of interface, and other any relevant network configuration you've done? – belacqua Oct 29 '11 at 22:17

1 Answer

up vote 1 down vote accepted

Open /etc/network/interfaces file

find desired interface and add following:

gateway 192.x.x.x

Restart network:

sudo /etc/init.d/networking restart
share|improve this answer
2  
What if the desired interface is configured via DHCP and I don't know the gateway address it will assign? – devmiles.com Aug 31 '12 at 10:40

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.