Giga Hub 2.0: PPPoE passthrough/2nd PPPoE session capped (average 330 Mbps) on 3 Gbps plan

[Velaris]

Hello,

I'm on a 3 Gbps plan and I'm seeing a repeatable/hard throughput cap only when using PPPoE on a downstream device (PPPoE passthrough / second session).

My setup:

- Bell Giga Hub 2.0
- Downstream router: UniFi Cloud Gateway Fiber (UCG-Fiber) connected to the Giga Hub 10G port

What works:

- If the UCG-Fiber WAN is set to DHCP (e.g. behind the Giga Hub 2.0/double NAT), I can reach full speed (~3 Gbps).
- If my PC is behind the Giga Hub 2.0 on DHCP, my PC (1GbE NIC) reaches the expected ~1 Gbps.

The problem (reproducible):

When I establish a PPPoE session from a device behind the Giga Hub, throughput is capped around ~300–330 Mbps.

Repro 1: PPPoE from UCG-Fiber

- UCG-Fiber WAN set to PPPoE using my b1 credentials
- Result: ~300–330 Mbps (repeatable), despite 3 Gbps plan

Repro 2: PPPoE from a Windows PC (bypassing UCG-Fiber)

- PC connected by Ethernet to the Giga Hub 2.0
- PC NIC: 1GbE, cable: Cat6A
- Created a Windows "Broadband (PPPoE)" connection using the same b1 credentials
- Result: same cap at ~300–330 Mbps (repeatable)

Because the same cap occurs even when PPPoE is established directly from a PC (*no* UniFi router involved), it points to the Giga Hub 2.0 PPPoE passthrough / secondary PPPoE session path rather than my router.

Can you confirm:

- Is this a known issue on the Giga Hub 2.0 (firmware-related)?
- Is there a firmware update or hardware replacement option to resolve PPPoE passthrough speed caps?

Thanks

[taid]

Yes DHCP does give you full speed, however the packet-loss disconnect is not false positive. If you are on any video calls/meeting, you will get disconnected. It is very unstable using DHCP. At least that is my experience. PPPOE is much more stable. 

[krw]

I’m not sure i agree with the whole subnet theory. The reason is that I am bypassing the GH 2.0 and any IP I obtain on reboots produces full 3 GB speed on my UCG-Fiber. I firmly believe Bell is looking at the number of PPPoE sessions in use and manipulating anything other than the primary for lower speed. 

[_fatkiid]

I use uptime kuma and smokeping beind ucg-fibre, and I don't get any loss or observe loss from day-to-day use, but the unifi cloud gateway constantly reporting packet loss or disconnected internet.

[_fatkiid]

No idea what the root cause is, but I get locked out of 3gbps for a few days, but then eventually get it back after constantly rebooting and switching between DHCP/ADMZ and PPPOE. 

[LeeAl]

Also experiencing this with my Gigahub 2.0 connected to my equipment via PPPOE passthrough, capping out around 750-800mbps upload and download.
I was getting the full speed for about a month or so when my service was first setup activated, not sure what changed. 

Super frustrating that they keep trying to push customers to use Bell equipment. 

[_fatkiid]

@LeeAl, do you have ucg-fiber too or a different router for pppoe?

[Velaris]

As per a Bell technician I spoke with, additional PPPoE sessions are capped on Bell's side. They've kept it ambiguous up until now for reasons I cannot comprehend - I'm not sure keeping customers in the dark is the right strategy here. Some clarity would help alleviate the frustration and would make the solution clear (e.g. migrating to Bell Business). I wouldn't mind paying more for a service better tailored to my needs, if that's what it takes.

[_fatkiid]

I understand a reasonable cap, I read somewhere in the past it was four. But I think most of are just doing a second PPPOE connection (on top of the Gigahub 2.0 default).

[Velaris]

I wonder if that cap has been decreased. The technician was very reluctant to shed more light on this, we had to communicate through handshakes and eye blinks.

[LeeAl]

I'm currently using an Asus router for my setup which has powerful enough specs to handle the overhead for PPPOE.
I've been leaning towards getting the UCG-Fiber for a while now so this might be the situation that really pushes me towards it and then bypassing the hub all together

[N2Narcosis]

Is this being taken seriously by anyone with the power to fix or change this?

[dks]

Thanks for your question. Bell staff do monitor and pass on relevant customer comments and experiences, but there is no feedback to the Community Forum regarding changes. Because the Giga Hub is manufactured by Sagemcom, I believe any firmware or technical changes to the Giga Hub are performed by them. The current Giga Hub firmware version is 3.11.3. Anything beyond that is not within the scope of the Community Forum. 

[N2Narcosis]

The topic of discussion is PPPOE session capping / throttling. Modem firmware was ruled out as a cause by previous commenters. 

[dks]

With respect, I answered your question about Bell staff monitoring questions and sending them forward. The modem firmware was an example of how Bell does their improvements. My apologies if that was not clear. With respect to the original question regarding concurrent PPPoE sessions, this issue was answered by Bell staff in this thread. 

[Vanadiel]

I can rule it in then, because I use PPPOE directly without a modem and my session(s) are not capped.

That leads me to believe it's either a limitation of the modem, or an issue/limitation of the firmware.