Dynamic Routing: How To

Note

To keep this tutorial short, a configuration is only added a single time. For example, the configuration of Site A and Site B are identical beside one octet in the IP addresses. Also both routers have the same configuration except the Network address of the uplink and the client network.

Situation

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We have two sites (Site A and Site B) which are connected via a layer 2 VPN. Each site has two additional routers, which are connected to the edge router and with each oder. On those routers, the clients are attached.

Configuration

In this setup, OSPF is used. All routers belong to the area 0.0.0.0 and no prefix lists are used.

Core Router of Site A

General Settings:

Setting Value
Enable Checked
Advertise Default Gateway Checked
Passive Interfaces Empty
Route Redistribution Empty

Networks:

Network Network Mask
192.168.0.0 30
192.168.1.0 30
192.168.1.4 30

Left Floor Router of Site A

General Settings:

Setting Value
Enable Checked
Advertise Default Gateway Unchecked
Passive Interfaces Interface name of 10.1.1.0
Route Redistribution Empty

Networks:

Network Network Mask
10.1.1.0 24
192.168.1.4 30
192.168.1.8 30