Hi all,

I just added a second NIC to my FC4 server. I am using the second ethernet card for a second IP address I have. My questions is for routing. Do I need two default routes?

Each card goes to a seperate router on the lan. My route table:

192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
192.168.0.0 * 255.255.255.0 U 0 0 0 eth1
169.254.0.0 * 255.255.0.0 U 0 0 0 eth1
default 192.168.1.254 0.0.0.0 UG 0 0 0 eth0
default 192.168.0.1 0.0.0.0 UG 0 0 0 eth1


Does this look correct?

It seems to drop one of the default GW's periodically. Any suggestions would be greatly appreciated.

any machine can have only one default route

you can define different routes for different interfaces ,but the default route will only be one

refer to iproute2 for more on this

regards

Masand,

Thank you for the info about the default route. I appreciate it.

Luck

I changed the route to have one default. Now the second nic is unreachable from the outside. Here's a route -n

Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.0.0 192.168.0.1 255.255.255.0 UG 0 0 0 eth1
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 eth0

I have two routers, each one has port forwarding to port 80 from different IP Adresses from the net in this configuration only the 192.168.1.0 network us working.

The reason for the different ip's on port 80 is for different applications listenting on it. I have web servers on one and ssh server on the other.

Have I missed something?

Thanks...

can u give the O/P of

ip route show

and what ar ethe ip addresses of your router etc


regards

The router addresses are:
192.168.1.254 for eth0 ip: 192.168.1.211
192.168.0.1 for eth1 ip: 192.168.0.211

I will have to get the rest of that later as I am not able to get to the machine at the moment.

I did a ping -I eth1 www.cnn.com and it says destination unreachable, but it works from eth0.

Have all of your hosts Default Gw's point at the same router, normally the internet router. If one of your hosts has another network on it then the other hosts need to vbe able to route to it.

Either set the Default Gateway up to route between the two networks, or set the host with the second network up as a router then on the Default Gateway put a network specific route with the routing host as the next hop.

Any traffic from a host to the second network will be redirected to the routing host.

Thanks for the reply Baldy, going to give it a try.