Does BIRD support multiple processes?

[ChuYinsu]

Hi,

I want to do some experiment and study about OSPF protocol. Here is a
simple topology:

+------+                                       +------+
| RT1 | Interface 1                        | RT2 |
|        |----------------------------------------|        |
+------+                      Interface 2  +------+

However I just have one computer, so I wondered can I simulate 2
routers on one computer? Using each Ethernet Interface for one router:

+-------------+Interface 1
| RT1        |--------------------------
|               |                         |
|---------------|                         |
| RT2        |--------------------------
|               |Interface 2
+-------------+

If BIRD supports multiple processes running, maybe this simulation
would be possible. But when I try to do this, the operating system
says another BIRD is already running.
Any ideas?

Thanks!