diff --git a/12_implementation/12.6_network.md b/12_implementation/12.6_network.md
index cd549c1..da5907d 100644
--- a/12_implementation/12.6_network.md
+++ b/12_implementation/12.6_network.md
@@ -50,7 +50,7 @@ $ sudo ln -s /proc/$pid/ns/net /var/run/netns/$pid
 ```bash
 $ ip addr show docker0
 21: docker0: ...
-inet 172.17.42.1/16 scope global docker0
+inet 172.17.0.1/16 scope global docker0
 ...
 ```
 创建一对 “veth pair” 接口 A 和 B，绑定 A 到网桥 `docker0`，并启用它
@@ -64,8 +64,8 @@ $ sudo ip link set A up
 $ sudo ip link set B netns $pid
 $ sudo ip netns exec $pid ip link set dev B name eth0
 $ sudo ip netns exec $pid ip link set eth0 up
-$ sudo ip netns exec $pid ip addr add 172.17.42.99/16 dev eth0
-$ sudo ip netns exec $pid ip route add default via 172.17.42.1
+$ sudo ip netns exec $pid ip addr add 172.17.0.99/16 dev eth0
+$ sudo ip netns exec $pid ip route add default via 172.17.0.1
 ```
 以上，就是 Docker 配置网络的具体过程。