Is there a cap of 35Mbps on DSL PPPoE?
-
Hi everyone,
I have Bell Canada "Fibe" DSL connection which is 50Mbps download / 8 Mbps upload. When I connect directly to their DSL Router/Modem it gives me a clean connection with speed of 50/8. But when I set PPPoE on pfSense Alix2D13 I get 35Mbps/8Mbps all the time. This is consistent. So, it's not a speed test issue. If I set the same port to DHCP and obtain IP from DSL Modem/Router on WAN port of pFsense then the speed jumps to 50/8. It's only the PPPoE protocol that gives me ~35-36Mbps download.
What am I missing here? Are there any tweaks to PPPoE that I can do?
Thanks,
-
it's not normal
-
Could this be due to maximum throughput of Alix2D13 hardware and PPPoE? Does PPPoE eat up 30% of bandwidth for it's encryption?
Thanks
-
I would guess this is an MTU problem. Somewhere in the connection something is having to fragment packets into two where there should be only one. PPPoE requires a larger MTU for the PPP overhead.
See: http://www.dslreports.com/faq/695Steve
-
Just to answer your question directly - I have ALIX 2D13 with PPPoE.
Currently getting 75Mbps from my BT fibre connection using PPPoE (rated at 80/20Mbps). If I connect direct I get 77Mbps, so no limitation.
-
To answer OP's question - the 35Mbps limit is a known issue w/ the POS Sagemcom modems that Bell provides.
There's a few work arounds that involve double NAT or (as of today) unlocking and MacGyvering a bridge mode.
http://www.dslreports.com/forum/r28103988-DSL-bridge-mode-on-Sagemcom-f-st2864.
