Routing between IP blocks

[ekinike]

I helping out a friend who recently acquired an additional block of public IP's from his ISP, which were not from the same block as the original IP's assigned.

We can access the internet from each separate block, as well as resources within the same range. The problem is that we cannot get to any resources from IP address block 1 to IP address block 2, and vice versa.

For example, computer with IP 192.168.1.1 cannot access a resources on computer with IP 192.169.2.1.

We realize configuration changes are necessary on the Cisco 2600 router in order for traffic to be passed back and forth. Please advise.

 

[jneiberger]

Can you give us more information, like a text diagram of this portion of his network? We need to know how things are connected, and we need to know how things are currently configured, before we can tell you how to fix it.

 

[gtmoore]

Like jneiberg said can you send some config of your router. To many variables (how many ethernet ports, are you using NAT)

 

[ekinike]

There is one ethernet port and no NAT or PAT involved. Very straight forward; two different IP blocks assigned from the same ISP that need to communicate with one another.

 

[IPKONFIG]

There are several ways you can skin this cat. You can change your IP's to private and NAT to the internet. You can get a switch that you can vlan out the subnets and then do one armed routing...it depends on how you want to handle this.

"I can picture a world without war. A world without hate. A world without fear. And I can picture us attacking that world, because they'd never expect it."
- Jack Handey, Deep Thoughts

 

[schofs]

You said One ethernet port for both blocks (without diagram difficult to work out.
If so does the ethernet interface on the router have a secondary interface address for the second block ?

 

[Cluebird]

Are you putting addresses from both blocks on the same network segment? If so, set the gateways on the hosts to be their own IP address and they will sort things out through ARP. The router will help fix this, too if it is doing proxy-arp. Or you can use a secondary IP address on the router interface.

A diagram and router configs would help as jneiberger states.