Hi, here is the situation Cisco 72xx- Radio link Mtik RB411 OS v3.10 - Cisco 18xx- Radio link Mtik RB411 OS v3.10 - Cisco 18xx mtik`s working in bridge mode AP mtu Ethernet mtu=1596 wlan mtu=1596 wds static mtu=1596 Station Ethernet mtu=1596 wlan mtu=1596 wds dynamic ping to ip with size 1508 df-bit...