zielnetz/pre      gw		i/f
-----------------------------------
host A:
192.168.2.0/24    0.0.0.0		eth0
172.16.0.0/16     192.168.2.254	eth0
0.0.0.0/0         192.168.2.254	eth0

router C:
141.31.147.20/30  0.0.0.0       fa0/2
192.168.2.0/24    0.0.0.0       fa0/1
172.16.0.0/16     141.31.147.22 fa0/2
0.0.0.0/0         129.143.0.5   fa0/3

router E:
141.31.147.20/30  0.0.0.0       fa0/1
172.16.0.0/16     0.0.0.0       fa0/2
192.168.2.0/24    141.31.147.21 fa0/1
0.0.0.0/0	  141.31.147.21 fa0/1

host B:
172.16.0.0/16     0.0.0.0       eth0
192.168.2.0/24    172.16.255.254 eth0
0.0.0.0/0	  172.16.255.254 eth0