CentOS 6

karim.wallani · 06-28-2012, 09:37 AM

I am using CentOS 6, and I have two network cards on my machine. After asking friends, I have figured out that I need to make my routing table look like this:

Code:

Destination      Gateway       Genmask            Flags   MSS    Window   irtt   Iface
111.68.222.48    0.0.0.0       255.255.255.240    U       0      0        0      eth1
10.1.8.0         0.0.0.0       255.255.255.0      U       0      0        0      eth0
10.0.0.0         10.1.8.1      255.0.0.0          UG      0      0        0      eth0
0.0.0.0          111.68.222.49 0.0.0.0            UG      0      0        0      eth1

In order to make this routing table persistent, I know I need to create the following two files:

1. /etc/sysconfig/network-scripts/route-eth0
2. /etc/sysconfig/network-scripts/route-eth1

But what goes in each of these two files? Please help.

grim76 · 06-28-2012, 09:42 AM

Why not just add the commands you need to rc.local, or a crontab that uses @boot?

karim.wallani · 06-28-2012, 09:49 AM

Well, CentOS documentation (http://www.centos.org/docs/5/html/5....ic-routes.html) says to use /etc/sysconfig/network-scripts/route-ethX files, where X is the interface #.

karim.wallani · 06-28-2012, 09:51 AM

I was thinking about putting the following:

In route-eth0:

ADDRESS0=10.1.8.0
GATEWAY0=0.0.0.0
NETMASK0=255.255.255.240
ADDRESS1=10.0.0.0
GATEWAY1=10.1.8.1
NETMASK1=255.0.0.0

In route-eth1:

ADDRESS0=111.68.222.48
GATEWAY0=0.0.0.0
NETMASK0=255.255.255.240
ADDRESS1=0.0.0.0
GATEWAY1=111.68.222.49
NETMASK1=0.0.0.0

Am I on the right track, or have I totally missed the mark???

grim76 · 06-29-2012, 08:09 AM

Ok unless I am missing something:

Code:

ADDRESS0=10.1.8.0
GATEWAY0=0.0.0.0
NETMASK0=255.255.255.240

Doesn't make sense to add when you have:

Code:

ADDRESS1=10.0.0.0
GATEWAY1=10.1.8.1
NETMASK1=255.0.0.0

Your route-eth1 to me does not make any sense. I would think it would be something like this

Code:

ADDRESS0=111.68.222.48
GATEWAY0=111.68.222.49 (if that is the actual GW provided by your ISP/Provider)
NETMASK0=255.255.255.240

I may be missing something, but that is what I am seeing here.

karim.wallani · 06-29-2012, 04:42 PM

Grim76, you're right, of course. It doesn't make sense to have this:

Code:

ADDRESS0=10.1.8.0
GATEWAY0=0.0.0.0
NETMASK0=255.255.255.240

when I have this:

Code:

ADDRESS1=10.0.0.0
GATEWAY1=10.1.8.1
NETMASK1=255.0.0.0

That's a typo on my part. route-eth0 is supposed to be this:

Code:

ADDRESS0=10.1.8.0
GATEWAY0=0.0.0.0
NETMASK0=255.255.255.0
ADDRESS1=10.0.0.0
GATEWAY1=10.1.8.1
NETMASK1=255.0.0.0

As to the second comment, 111.68.222.49 is the gateway provided to me. I want to make this my default gateway. How can I do it?