很多人抱怨极路由没有提供有线中继功能，以下教程使用小米路由器作为主路由器upstream router), 极2路由作为有线中继. 这样可以比无线中继更稳定，性能更好。
其实并没有所谓“有线中继”的概念，应该说“给一个有线网络连接添加无线接入功能”，也就是所谓的wireless access point AP).
一个无线路由器=路由器+无线AP
以前当无线路由器刚出来的时候，价格昂贵，相比较而言，无线AP更有性价比，但是现在无线路由器厂商众多，价格竞争激烈，甚至已经比无线AP还便宜，所以用无线路由器就可以了。
以下步骤随手用英文记录，懒得翻译了。
注意： 这种方式有点hacking, 出了问题后果自负。
目前存在的问题是： 极路由的云插件没法用了，页面互联网状态显示稍有瑕疵Step 11)，固件不能自动在线更新，不过我觉得都无伤大雅。
The basic idea is to turn Gee into a wireless switcher/AP.
0. Do NOT connect Gee router to any upstream router. This is just for clarity.)
1. Connect to the default Gee router wifi access point. e.g. HiWiFi_XXXXX
2. Go to management page of Gee router. If you didn’t follow step 0, you may need to manually configure your network adapter to be in the same segment as Gee. Default Gee segment is 192.168.199.x.)
3. Keep the DHCP function enabled in Gee. This is why you can connect your computer wirelessly to the Gee router in step 1. Otherwise, you have to use a wired connection to configure the Gee router as AP.)
4. Modify the Gee’s admin page IP into the same segment as upstream router. e.g. 192.168.31.2. So that later you can manage Gee within the upstream router’s segment. Make sure this IP is not in the upstream router’s DHCP range. This is to avoid potential IP confilict.)
5. Gee will ask you to reboot. Reboot it.
6. Visit the management page at the new IP set in step 3. e.g. 192.168.31.2.
btw, you will find the DHCP segment in Gee has automatically changed from 192.168.199.* to 192.168.31.* accordingly.)
7. Rename 2.4G and 5G wifi APs if you want and add passwords to secure them. Then the default HiWiFi_XXXXX access point will disappear. And if you type ipconfig command line, you will find no ip configuration now.
8. Connect to the new APs in step 7.
9. Connect Gee’s LAN NOT WAN) port to upstream router LAN port with a wire.
10. Disable Gee’s DHCP function since we want upstream router to provide the DHCP function. Because there should be only one DHCP server in a single segment.)
11. Now you can use Gee as a wireless switcher/AP.
btw, if you go to Gee’s management page at 192.168.31.2 and check the “Internet” tab, it still says “no connection to Internet”. I think this page is related to Gee’s WAN port, which connects to nothing now. But anyway. Just leave it as automatic mode and change nothing since WAN port is never used in our scenario.)
Some suggestions:
1. Set the AP Gee’s wireless channel to be different from the upstream router’s channel.
2. Set the AP Gee’s SSID to be different from the upstream router’s. I believe explicit is better than implicit.
3. Encrypt the AP Gee’s AP, as step 7 above says.
On my box, 192.168.31.1 is the Mi Mini router management page, 192.168.31.2 is the Gee router management page. Quite handy for me.
And both Mi and Gee are in the same segment, which is desired by many…