More from the ICSI Netalyzer: "The path between your network and our system supports an MTU of at least 1500 bytes, and the path between our system and your network has an MTU of 1486 bytes. The bottleneck is at IP address 188.8.131.52."
Looks like an MTU of 1500 is possible with MLPPP. Which should be reasonable if we're splitting and reassembling the packets at the PPP layer. Now of course, this is only true if we're actually running two full PPP tunnels, and not the "single link MLPPP" thing that some people use to defeat the Bell DPI systems.
Single Non-MLPPP Line = MTU of 1492 Single MLPPP Line = MTU of 1486 Multiple MLPPP line (assuming you are splitting your packets properly both ways) = MTU of 1500 -- TSI Gabe - TekSavvy Solutions Inc. Authorized TSI employee ( »TekSavvy FAQ »Official support in the forum )