Same problem here. I opened a ticket to support! If you can do the same, maybe they can look at the issue with more situations! I opened a ticket and included supout.rif and packet capture files for both 6.30.2 and 6.33. This can mean two things: either the RFC4638 support is broken and thus the ro...

Is your PPPoE link running over plain ethernet or on top of a VLAN? What modem do you use? Uplink runs from the RouterBOARD to a TP-Link SG3210 switch which then goes out over a VLAN to an ethernet to fiber media converter to my ISP. An MTU of 1500 seems to be working fine when using 6.30.2, confir...

*) pppoe - added support for MTU > 1492 on PPPoE; What has changed regarding MTU sizes on PPPoE interfaces? I have been using 6.30.2 on a RB2011UAS-2HnD-IN and was able to use an MTU of 1500 bytes when connecting to my ISP's PPPoE server. After upgrading to 6.33 I am no longer able to connect with ...