AP Client模式是只能作为WISP使用吗？

Lentrody

如果把系统操作模式设为AP模式，再用AP Client连上级路由WiFi，会导致连接本级WiFi的设备在上级路由里看到都是同样MAC地址，然后无法正常分配IP。
所以要么在AP模式下用WDS连接，要么在路由模式下AP Client角色设为WAN(Wireless ISP)。
查了半天找到这个说法 https://forum.openwrt.org/t/mode ... -not-work/145782/11

The open source drivers such as mt76 and ath9k adhere closely to the IEEE specification which means that a STA interface can't be in a bridge, because there is no way to transmit a final destination MAC address back to the AP. The MAC address of the destination needs to be the same as the MAC of the radio because there are only three MACs in the packet (original source, AP radio, and STA radio/destination).

Other drivers may work around this by spoofing ARPs similar to how relayd works (sort of). Fundamentally though the IEEE specification assumes that the device at the STA end of an AP-STA link will be a single endpoint (a laptop or tablet etc)-- not a switch, and there is no good way around that.

This is mostly an issue with IPv4. IPv6 can work to almost full potential with layer 3 links. Looking forward to future developments there is little reason to "fix" this.

也就是说以标准规范来说无线客户端后面是不能连交换机的？所以正常来说只能用WISP来作为中继，或者用WDS这样的专用中继协议。市面上那些WiFi中继器一类的东西并不符合标准，都是厂商自己魔改出来的玩意儿。
那么padavan和openwrt有没有类似的魔改来实现这样的WiFi中继功能呢？

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