I've just recently starting experimenting with MLPPP over single link PPTP connections. I've noticed that large packets do not fragment properly and I'm wondering if it's a problem with my config.

If I setup a regular PPTP connection with MRRU disabled and a 1460 byte MTU packets fragment properly. For example I can send and receive a 1700-byte ICMP echo request/reply.

When I setup MRRU to 1614 on both the client and server I can only send a 1610-byte ICMP echo request/reply. For some reason the packets are not fragmenting properly. Has anyone else noticed this behavior?

I'm gonna give this one bump then forward my question to support.