Default Route question when there are two nic cards

[David G. Miller]

"Styma, Robert E (Robert)" <stymar at lucent.com> wrote:

>>> Mine is set in /etc/sysconfig/network
>>> 
>>> GATEWAY=148.197.29.254
>>> 
>>> but sometimes appears in all of the 
>>> 
>>> /etc/sysconfig/network-scripts/ifcfg-ethx's
>>> 
>>> Don't think there is any harm in having it in all of them - 
>>> provided it
>>> says the same thing!
>>> 
>>    
>>
>That did the trick.  That an removing the erroneous one from ifcfg-eth1.
>Turns out the last one processed won.
>
The default route is tried last.  I end up with the following routing 
table using the ifcfg-ethX files below:

[root at fraud ~]# netstat -n -r
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt 
Iface
72.19.169.0     0.0.0.0         255.255.255.0   U         0 0          0 
eth0
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 
eth1
192.168.0.0     0.0.0.0         255.255.0.0     U         0 0          0 
eth1
0.0.0.0         72.19.169.1     0.0.0.0         UG        0 0          0 
eth0
[root at fraud ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# 3Com Corporation 3c905C-TX/TX-M [Tornado]
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=72.19.169.230 <-- My external IP address
NETMASK=255.255.255.0
GATEWAY=72.19.169.1 <-- My ISP's gateway
[root at fraud ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
ONBOOT=yes
BOOTPROTO=none
IPADDR=192.168.255.254
NETMASK=255.255.0.0
GATEWAY=72.19.169.230 <-- Set GW for internal NIC to external IP address
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes
MTU=9000

Internal traffic from the server goes out eth1 since that route gets 
tried before the default route.

Cheers,
Dave

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