Flint 2 on Vodafone Fibre via Openreach FTTP (SLOW speeds).

Routers
1

Hey all,

I’m hoping someone here in the UK has managed to get a GL.iNet Flint 2 (GL-MT6000) working properly with Vodafone Fibre via Openreach FTTP.

My setup

  • ISP: Vodafone Fibre (Openreach network)

  • Package: 910

  • ONT: Openreach white wall-mounted box, Ethernet from LAN 1 into Flint 2 WAN

  • Router: GL.iNet Flint 2 running firmware [4.8.3]

  • Connection type: PPPoE

  • VLAN: none

  • PPPoE credentials: from Vodafone support ([email protected], custom password)

  • MTU: left blank (defaults to 1500) — have also tried 1492

  • Hardware Acceleration / Flow Offload: enabled

  • VPN / AdGuard / QoS: all disabled for testing

The problem:

When I connect directly to Vodafone’s Power Hub router, I get my full line speed (around 900 Mbps).

When I connect the Flint 2 directly to the ONT with PPPoE configured, it connects fine and gets a public IP — but I only get less then half the expected speed, usually in the 300–400 Mbps range.

I’ve seen other people mention PPPoE offload issues or MTU mismatches, but haven’t found a confirmed working setup on Vodafone (Openreach) specifically — only CityFibre users with VLAN 911.

What I’ve tried

  • MTU 1452, 1492, (but setting any MTU stops me getting a connection)

  • Toggling hardware-accel settings

  • Latest firmware upgrade

  • Different Ethernet cables & ports

  • Disabling all extra services (AdGuard, VPN, QoS, etc.), even doing a full reset.

I really love the Flint 2’s features and want to ditch the Vodafone router entirely, but right now it’s not performing as expected on PPPoE.

Cheers,
Pigeon.

3

Hi

Could you please provide us with a few more details about this issue?

  1. How did you perform the speed test?
    If it was done via Wi-Fi, please try using a wired connection and select some nearby speed test server for more wide/accurate results.
  2. When you changed the MTU to a lower value, did any error message appear, or did the PPPoE connection simply fail to establish?
  3. Have you tried cloning the MAC address of the Vodafone Power Hub router?
4

I have used a Flint 2 on Vodafone UK FTTP. What you need to do is use the black Ethernet cable that come with the flint 2 and plug this into the ONT, then plug the other end into the WAN port on the flint 2.

With a factory reset Flint 2, when it boots up it will ask you for the username and password for the pppoe connection. Enter these and alter no other settings.

Once the connection is established run a speed test via a cable directly connected to your pc or laptop to check the speed. This will rule out anything you have changed.

5

This was my starting point, and resulted in the slow speeds described above.

6

How did you perform the speed test?

Wired (cat5e) from Voderphones router to laptop = 900mbps
Wired (cat5e) from Flint 2 router to laptop = 300mbps

When you changed the MTU to a lower value, did any error message appear, or did the PPPoE connection simply fail to establish?

Simply failed to establish with any value, had to leave the box empty to get a connection, all be it the slow one

Have you tried cloning the MAC address of the Vodafone Power Hub router?

I have now, no change in speed.

7

SSH into the router and run a speedtest to cut out the laptop running the speedtest.

8

Well, that’s interesting….

[ 5] local 192.168.1.128 port 50544 connected to 31.132.7.130 port 5300
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 107 MBytes 894 Mbits/sec
[ 5] 1.00-2.00 sec 111 MBytes 933 Mbits/sec
[ 5] 2.00-3.00 sec 111 MBytes 933 Mbits/sec
[ 5] 3.00-4.00 sec 111 MBytes 933 Mbits/sec
[ 5] 4.00-5.00 sec 111 MBytes 933 Mbits/sec
[ 5] 5.00-6.00 sec 111 MBytes 933 Mbits/sec
[ 5] 6.00-7.00 sec 111 MBytes 933 Mbits/sec
[ 5] 7.00-8.00 sec 111 MBytes 933 Mbits/sec
[ 5] 8.00-9.00 sec 111 MBytes 933 Mbits/sec
[ 5] 9.00-10.00 sec 110 MBytes 919 Mbits/sec

[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.01 sec 1.08 GBytes 929 Mbits/sec 0 sender
[ 5] 0.00-10.00 sec 1.08 GBytes 927 Mbits/sec receiver

iperf Done.
root@GL-MT6000:~#

Now if only I could get that speed through the Flint into my network!?

1 Like
9

That seems a bit unusual.

Could you please try running an iperf3 server on the Flint 2 and test the speed by the same laptop wired connecting to it?

Also, just to confirm, did you also use the following command for your previous speed tests?

iperf3 -c iperf.as42831.net -p 5300-5400 -R