Since changing to a PPPOE ISP yesterday, my MX105 seems to be throttling speeds and I have no idea why. I was with Virgin Media (VM) who use DHCP public IP addresses but my new ISP (BT) uses PPPOE. I should be getting 900Mbps down and 110 up but I’m only seeing 350 down and 0.35 up.
When with VM, I had their router in modem mode and used the MX as the router and firewall. Everything was fine with VM and I got full speeds. When I moved to BT, I connected the MX direct to the ONT – the router doesn’t have a modem/bypass function – you just go direct to the ONT.
When I noticed the reduced speeds direct to the ONT, I unplugged the MX from the ONT, reconnected BT’s router and plugged in a laptop and ran some speed test, all of which showed full speeds (900/110).
Any ideas on what may be causing the reduced speeds through the MX?
Many thanks!
I'm a little unclear on the last part of your post. Have you run a speed test over the new BT connection without the MX and gotten the expected speeds?
Any chance the ports are auto negotiating to half duplex when connected to the ONT?
Yes, you are correct, running a speed test using just the BT router connected to the ONT shows the expected speeds.
I'll check the ports in the morning and report back.
Hopefully it's just a speed/duplex issue, we've seen this a couple times with our MX's that connect to CenturyLink or AT&T ONT's. We've had to go manually set the ports to 100/full or 1gbps/full, depending on what the carrier specifies.
Can you connect your laptop to the ONT and setup the PPOE settings and test the speeds your getting? This way rules out any hardware..
Hi Miles, just done as you said and surprisingly, I'm getting the same problem as with the MX - 260 down and 0.35 up.
As soon as I reconnect the BT router to the ONT, and do a speed test on a wired connection, I'm getting full speed.
Some thoughts of mine (I know nothing about BT ONT configuration):