if you run /sbin/ifconfig on your terminal command line, does eth1 have an IP address?
to see ALL of the interfaces on your system, use /sbin/ifconfig -a to show ALL of the interfaces that are avalible on the system. just running /sbin/ifconfig without any extra flags will just show you the configured interfaces.
you may have to assign a static IP to the interface using [as root]:
[root@c0re config]# ifconfig ethN [ your_ip ]
[root@c0re config]# route add default gw [ your_gateway_ip ]
OR to assign a dhcp ip
[root@c0re config]# dhcpcd -k -d ethN
[[ N is the number of your network interface. ]]
the route commad allows you to assign or show network information. to check and see if route has properly entered your gateway [router] into your routing table, just run 'route' on a command line. it should give you some output that looks kind of like this.
[root@c0re config]$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default router 0.0.0.0 UG 0 0 0 eth0
you can see the default route in the last line. my router has an assigned hostname of 'router' im my /etc/hosts file, so you see its name come up as opposed to the IP.
-k -- kills any previous dhcpcd processes, just in case its already running
-d -- kicks dhcpcd into verbose mode, so you can see whats going on. just in case your box is having problems talking to your router.
you might want to post the output from an ifconfig and ifconfig -a and a route command. just so we can see it. we might be able to give you some more help that way.