Policy Routing Using Linux®

Bounce Table Walking

There are times when being able to define the table to which you will send a packet is simply not enough. To this point you have specified uses of the RPDB that end in the final routing table destination. You wonder about additional interactions between the rules and route tables.

Example 6.4—Throw Routes

Returning to your test network setup you decide to make the two hosts, host1 and host2, appear as two different networks. To make the packet traces obvious, you use 172.16.1.1/24 for host2 and leave host1 on 10.1.1.3/24. On router1 you assign 10.1.1.254/24 and 172.16.1.254/24 to dev eth1 on Network B. After setting up these addresses you verify that host2 can ping all other systems.

So your test setup now has the following ...