Re: Second ethernet card seems to cause networking failure?

[Adrian Levi <adrian.levi@gmail.com>]

2009/5/27 Frank Miles <fpm@u.washington.edu>:
> Sure, can provide more info...
>
> ============ /etc/network/interfaces :
>
> auto lo
> iface lo inet loopback
>
> # The primary network interface
> auto eth0
> #iface eth0 inet dhcp
> iface eth0 inet static
>        address xxx.yyy.zzz.32
>        network xxx.yyy.zzz.0
>        netmask 255.255.255.0
>        broadcast xxx.yyy.zzz.255
>        gateway xxx.yyy.zzz.100
>        pre-up /etc/iptables/iptables.sh start
>        post-down /etc/iptables/iptables.sh stop
>
> # The secondary network interface
> auto eth1
> #iface eth0 inet dhcp
> iface eth1 inet static
>        address 192.168.42.100
>        network 192.168.42.0
>        netmask 255.255.255.0
>        #broadcast 192.168.42.255
>        gateway 192.168.42.100

This here looks wrong, you don't set a default gateway for the local
lan. Route will figure it out. If you comment that out restart
networking, one of the interfaces (Hopefully eth0) will have a default
entry in 'route'. like:

caprica:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     *               255.255.255.0   U     0      0        0 eth1
211.31.0.0      *               255.255.240.0   U     0      0        0 eth0
default         c211-31-0-1.roc 0.0.0.0         UG    0      0        0 eth0
caprica:~#

HTH,
Adrian

-- 
24x7x365 != 24x7x52 Stupid or bad maths?
<erno> hm. I've lost a machine.. literally _lost_. it responds to
ping, it works completely, I just can't figure out where in my
apartment it is.