Chris 🇹🇼 | Telegram 尼有事嗎 says to YSITDIt is generally recommended that the MTU for a WAN interface connected to a PPPoE DSL network be 1492. In fact, with auto MTU discovery, 1492 is discovered to be the maximum allowed MTU. However, having an MTU of 1452 is most optimal.at Mon, Jun 27, 2016 2:40 PM