路由实验

 

 两台主机指向各自路由

route1

cd /etc/sysconfig/network-scripts/
  vim ifcfg-eth0 
  cp ifcfg-eth0 ifcfg-eth1
  vim ifcfg-eth1
  nmcli con reload
  nmcli con up eth0
  ip a
#开启路由转发
  echo 1 > /proc/sys/net/ipv4/ip_forward
  cat /proc/sys/net/ipv4/ip_forward
  route -n
  ip a
  route add -net 172.20.0.0/16 gw 172.18.0.201 dev eth1
  route add -net 172.22.0.0/16 gw 172.18.0.201 dev eth1
  route -n
  route del -net 172.22.0.0/16 gw 172.18.0.201 dev eth1
  route del -net 172.20.0.0/16 gw 172.18.0.201 dev eth1
  route -n
#因为是边路，所以换成默认路由也可以
  route add default gw 172.18.0.201 dev eth1

route2

cd /etc/sysconfig/network-scripts/
  vim ifcfg-eth0 
  cp ifcfg-eth0 ifcfg-eth1
  vim ifcfg-eth1
  nmcli con reload
  nmcli con up eth0 
  ip a
  ping 172.18.0.200
  echo 1 > /proc/sys/net/ipv4/ip_forward
  cat /proc/sys/net/ipv4/ip_forward
  route add -net 172.16.0.0/16 gw 172.18.0.200 dev eth0 
  route add -net 172.22.0.0/16 gw 172.20.0.201 dev eth1 
  route -n

route3

cd /etc/sysconfig/network-scripts/
vim ifcfg-eth0 
cp ifcfg-eth0 ifcfg-eth1
vim ifcfg-eth1 
nmcli con reload 
nmcli con up eth0
ping 172.20.0.200
echo 1 > /proc/sys/net/ipv4/ip_forward
cat /proc/sys/net/ipv4/ip_forward
route add default gw 172.20.0.200 dev eth0
ping 172.16.0.200