Hi,

In reply to a post by Ad_G:

As others have said CityFibre GPON is a 1:32 split, the specs may go to 1:64 but they don’t go beyond 1:32. It will be very unlikely there are actually 32 on a given PON due to the way the physical network is.

And CityFibre don’t use PPPoE, they provide a semi transparent layer 2 Ethernet link to your ISP. Your ISP can pick to use PPPoE or IPoE. There are at least two major ISPs using CityFibre (and Openreach FTTP) who use IPoE with DHCP so no extra overhead with those ISPs. It is Vodafone that have chosen to use PPPoE.

The speeds ISPs including Vodafone advertise are covered by very strict rules from Ofcom. The 910/910 is the agreed number and the ISPs have to provide evidence of the speeds to meet the speed code of conduct.

If you are not getting 910/910 then their is either a problem with your own network or their is an issue that needs raising with Vodafone. Vodafone should have told you what their guaranteed speed is for your service. I’ve seen lots of results of people getting the above speeds.

Note that Cityfibre support an ethernet packet size of at least 1900 bytes from ISP to customer. Some ISPs will use that to allow their customers to have a 1500byte MTU, even with the PPPoE overhead. Of course, the PPPoE header is still an overhead which reduces throughput at the IP level and above.