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rated 0 times [  16] [ 0]  / answers: 1 / hits: 234001  / 1 Year ago, fri, november 25, 2022, 1:16:07

Trying to do below on Ubuntu 12.04.



Trying to configure eth0 and eth1, eth0 works fine, but failed to bring eth1.



Below is the settings /etc/network/interfaces:



auto eth0 eth1



iface eth0 inet static

address 172.19.20.186

netmask 255.255.255.252

network 172.19.20.184

broadcast 172.19.20.187

gateway 172.19.20.185



iface eth1 inet static

address 172.18.182.55

netmask 255.255.254.0

gateway 172.18.182.1



up route add -net 172.19.26.0/23 gw 172.19.20.185 dev eth0

up route add -net 172.19.24.0/23  gw 172.19.20.185 dev eth0

up route add default  gw 172.18.182.1 dev eth1


When /etc/init.d/networking restart is done, giving below error:



$ /etc/init.d/networking restart

RTNETLINK answers: File exists

Failed to bring up eth1


Even ifdown eth1 and ifup eth1 giving above error.



Can anyone help how to resolve this?


More From » networking
 Answers
4

I think you only need one default gateway. You have set up 3: gateway 172.19.20.185, gateway 172.18.182.1 and up route add default gw 172.18.182.1 dev eth1.



Try the following interfaces file:



auto eth0 eth1



iface eth0 inet static

  address 172.19.20.186

  netmask 255.255.255.252



iface eth1 inet static

  address 172.18.182.55

  netmask 255.255.254.0

  gateway 172.18.182.1

  up route add -net 172.19.26.0/23 gw 172.19.20.185 dev eth0

  up route add -net 172.19.24.0/23 gw 172.19.20.185 dev eth0


EDIT: Try this to manually configure the interfaces, so we can see where is the error.




  1. Shut down all interfaces: ifconfig eth0 down; ifconfig eth1 down; ifconfig eth2 down; ifconfig eth3 down

  2. Configure eth0: ifconfig eth0 172.19.20.186 netmask 255.255.255.252 up

  3. Configure eth1: ifconfig eth1 172.18.182.55 netmask 255.255.254.0 up

  4. Set up default gateway: route add default gw 172.18.182.1

  5. Set up first static route: route add -net 172.19.26.0/23 gw 172.19.20.185 dev eth0

  6. Set up second static route: route add -net 172.19.24.0/23 gw 172.19.20.185 dev eth0


[#30846] Friday, November 25, 2022, 1 Year  [reply] [flag answer]
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