Problems getting 2 NICs to work.

[Kevin Kimmell]

I tried this and get "RTNETLINK answers: Invalid Argument". Then I tried 
to just manually add these routes:

ip route add 12.168.88.0 dev eth0
ip route add 204.117.218.0 dev eth1

It accepts these but can't seem to do lookups. I get a "connect: Network 
is unreachable" with any ping or trace attempt. I know there is 
something simple missing here. I'm reading this Advanced Routing HOWTO 
and it seems section 4.2 is exactly what I'm trying to do but I'm having 
a bit of trouble making sense of what commands go into what files.

++ Kevin Kimmell + kevin_AT_dynamictrend.com + Dynamic Trend, Inc. ++



Alexander Dalloz wrote:

>Am Mo, den 17.05.2004 schrieb Kevin Kimmell um 17:50:
>
>  
>
>>Yes, I have two full class c networks from 2 different ISPs. I am simply 
>>trying to assign one IP address from each ISP to the two NICs in these 
>>machines. When both NICs are acivated, they both show up in a cat of 
>>/proc/interrupts.
>>    
>>
>
>Ok, so it is the first step to get at least 1 IP from each net working
>in parallel. Understand that not. Just wanted to be sure.
>
>  
>
>>Another observation that I've made (I'm unsure if it even means anything):
>>
>>When I "ifup eth1" the default route moves from the gateway of eth0 to 
>>the gateway of eth1 and then when I ifdown eth1 the default gateway 
>>ceases to exist.
>>
>>Strange things...
>>    
>>
>
>No, that is not strange. That is how the network scripts work. You
>defined the GATEWAY each in the ifcfg-ethX configurations files. As your
>setup is no typical one you will have to do some more handwork. At least
>delete the GATEWAY entries and make use of static routes. Create
>
>/etc/sysconfig/network-scripts/route-eth0
>
>with following content
>
>12.168.88.12/24 via 12.168.88.254
>
>and
>
>/etc/sysconfig/network-scripts/route-eth1
>
>204.117.218.12/24 via 204.117.218.254
>
>Alexander
>
>
>  
>