WAN VLAN ID for Zen FTTP installation

I could have posted this in the fibre technical forum but as the request is Zen specific I thought I would try here first in case a quick answer is available before posting elsewhere or contacting Zen support.

Finally, our FTTP connection to Zen is about to complete. Openreach have completed the outside work and we now have fibre to the CSP outside. The second visit is booked for this week for the internal connection including fitting of the ONT.

I would like to use my existing router (Billion 7800nxl) via the EWAN socket to connect to the Optical Network Termination (ONT).

I've researched this and am happy with all connection settings except a VLAN value. Google tells me that the VLAN value for a Zen FTTC connection is 101 and I am trying to find out if this would be the same for FTTP, which is my case.

The available info on FTTP seems to be a lot lower than FTTC due to the much smaller rollout.

Anyone help with a value?

Thanks.

Should be the same as both are GEA based services

Thank you MrSaffron. Appreciated.

Just to follow up on my original post.

Zen FTTP is now installed and working. I am using a Billion 7800nxl connected to the BT ONT via the EWAN port.

The values for VLAN ID and the corresponding 802.1P Priority are left unset. Vaues -1 in the case of the Billion kit. Setting the VLAN ID to 101 stops things working.

I know this is only of interest to a small minority of users but am posting to help anyone who may be searching for the info in future.

JB.

We are now a few years on since this thread was active but it raises a question that will be asked more often as more people have FTTP installed.
The VLAN on the Technicolor DGA4134 supplied with my Zen/City Fibre installation last week was 911.
The same VLAN works with my Asus DSL-AX82U router.

I clocked that in your other thread where you posted the screenshots!

Unsurprisingly that topic has come up a number of times with various ISPs using CityFibre infra…and the answer on VLAN IDs is “it depends”.

911 is one of those used but it’s not universal even from the same ISP.

Edited by Pheasant (Mon 07-Mar-22 17:45:20)

I read a few more postings on the subject after I posted, including one that said 911 didn't work for them.

When we first launched services over CityFibre's network they required us to use VLAN 0. This worked great with our FRTZ!Boxes but lots of other CPE didn't support using a VLAN ID lower than "1". After working with CityFibre they agreed to change the spec to support using VLAN 911.

So now at the point we place or order with CityFibre we can specify either VLAN 0 or VLAN 911.

We've been using VLAN 911 on all new orders for quite some time now.

Edited by ajays (Wed 09-Mar-22 08:42:29)

Meanwhile on Zen's FTTC my FritzBox is connected using VLAN 101 and a VCI of 38.

I connected A N Other router via a bridged modem using PPPoE and it runs without me setting anything other than username and password. I seem to remember it wouldn't connect when I had the VLAN set.

How, why? Should I always have a VLAN set when connecting?

Two different kettles of fish…Openreach GEA (either FTTC or FTTP) will handle VLANs on CPE quite differently to CityFibre. This varies by network builder and their CPE. There is no hard and fast rule.

On Openreach FTTP for example, the ONT tags/untags the single (C-VLAN) or double tagged (C-VLAN + S-VLAN) traffic at the Ethernet interface. So when you connect a third party router all ISP traffic is on the default VLAN. No need to set anything on the router.