rendered paste body+-----------------------+ +-----------------------+ +-----------------------+
| | | | | DSL Router |
| eth0 | | eth0 | | |
| 192.168.200.201 -+-+--------------+--- 192.168.200.202 ---+------+--- 192.168.200.254 |
| | | | | | |
| eth0:1 | | +-----------------------+ | (NAT routing) ---+--- Internet
| 192.168.200.1 ---+ | M2 | |
| | +-----------------------+ +-----------------------+
| | | | Router
| tap0 | | eth0 |
| 172.20.0.1 ---+--------------+--- 172.20.0.2 |
| | | |
+-----------------------+ +-----------------------+
M1 M3
(M1)# route -n
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.200.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
172.20.0.0 0.0.0.0 255.255.0.0 U 0 0 0 tap0
0.0.0.0 192.168.200.254 0.0.0.0 UG 0 0 0 eth0
(M2)# route -n
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.200.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 192.168.200.254 0.0.0.0 UG 0 0 0 eth0
(M3)# route -n
Destination Gateway Genmask Flags Metric Ref Use Iface
172.20.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 172.20.0.1 0.0.0.0 UG 0 0 0 eth0