Multiple NIC with a single Subnet
I know this is widely talked about over the internet but I cannot find a black and white solution especially given I am no linux guru.
Problem: I have two seperate networks both using the same subnetmask which is a must and I would like to have a single redhat enterprise box visible from both networks at the same time. I have configured two network interfaces and have the below scheme
eth0 192.168.1.3 subnet 255.255.255.0
eth1 192.168.1.4 subnet 255.255.255.0
The problem is that I can only ping thing on eth0's network yet both networks look fine when doing ifconfig. I have read reviews of this problem and it seems to be a linux issue and the solution varies from creating routing tables and messing with ARP etc but none give me enough details to implement these myself. The NIC's are currently tied to the two motherboard ports but can just as easily be transfered to seperate cards but I believe the issue is more a linux only allowing a single port to be brought up on the subnet mask.
The Mac address for each one looks different and both ports are enabled and on the machine I can ping both just not out of eth1.
I know a enough about redhat to navigate round, setup networks and knock up scripts etc but not enough about the networking + ARP + Routing tables to do anything clever myself, so an idiots guide would be massively appreciated!!