网络拓扑图

image.png

三个网段

vmnet2：192.168.37.0/24
vmnet3：10.0.0.0/8
vmnet4：172.16.0.200/16

网卡配置

server A

eth1:
inet 192.168.37.6 netmask 255.255.255.0 broadcast 192.168.37.255

R1

eth1:
inet 192.168.37.200 netmask 255.255.255.0 broadcast 192.168.37.255
eth2:
inet 10.0.0.1 netmask 255.0.0.0 broadcast 10.255.255.255

R2

eth1:
inet 10.0.0.2 netmask 255.0.0.0 broadcast 10.255.255.255
eth2:
inet 172.16.0.200 netmask 255.255.0.0 broadcast 172.16.255.255

server B

eth1:
inet 172.16.128.0 netmask 255.255.0.0 broadcast 172.16.255.255

路由表设置

R1

[root@80_12 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.0.0.0        0.0.0.0         255.0.0.0       U     102    0        0 eth2
172.16.0.0      10.0.0.2        255.255.0.0     UG    0      0        0 eth2
192.168.37.0    0.0.0.0         255.255.255.0   U     101    0        0 eth1

R2

[root@80_13 ~]# route add -net 192.168.37.0/24 gw 10.0.0.1
[root@80_13 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.0.0.0        0.0.0.0         255.0.0.0       U     101    0        0 eth1
172.16.0.0      0.0.0.0         255.255.0.0     U     102    0        0 eth2
192.168.37.0    10.0.0.1        255.255.255.0   UG    0      0        0 eth1

R1，R2启动路由转发

echo 1 > /proc/sys/net/ipv4/ip_forward

检测

traceroute 172.16.0.7
traceroute 192.168.37.6
mtr