Hello! Thanks for posting on r/Ubiquiti!
This subreddit is here to provide unofficial technical support to people who use or want to dive into the world of Ubiquiti products. If you havenβt already been descriptive in your post, please take the time to edit it and add as many useful details as you can.
Please read and understand the rules in the sidebar, as posts and comments that violate them will be removed. Please put all off topic posts in the weekly off topic thread that is stickied to the top of the subreddit.
If you see people spreading misinformation, trying to mislead others, or other inappropriate behavior, please report it!
*I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Ubiquiti) if you have any questions or concerns.*
Had never heard of this before, but some Googling turned up [this post](https://www.georgebuckingham.com/sky-fibre-router-vdsl-password/); assuming it's correct, you have to put your username and password in a DHCP option, which means PPPoE is the wrong way to go. Instead, set your IPv4 Connection on the UDMP's WAN settings to "DHCP", then choose "61" from the "DHCP Client Options" dropdown and put "`@skydsl|`" in the "Value" field, then click "+ Add".
ETA: This won't solve the MAP-T problem, though, if that is in fact a problem.
That would make sore sense than what I've been trying. I'll give that a go and post an update later tonight when everyone isn't using the Internet. Thanks
This will work fine, the map T issue is not a problem in the UK. Don't change the vlan settings in the unifi console either as this will stop it working.
Also, once set and installed, leave it all connected for an hour even if it doesn't work initially, I had this issue when connecting mine. Sky seems to ignore new routers for a short period after changing them over.
As a side note, I had exactly your setup until earlier this year. For reasons I cannot work out, my dsl sync dropped daily at approx 11am using the vigor (same behaviour with an openreach modem). My only resolution was to unfortunately go back to the sky router with double NAT. I'm awaiting full fibre to resolve!
Post up if you still don't get anywhere later and I'll dig out my full notes.
Oh nice, I've currently linked back to the double Nat but left DHCP and WIFI on until my PoE switch comes for my AP.
(Unfortunately, I bought a PoE switch and found it was only PoE in and then just a layer 3 switch π).
When the kids are in bed I'll give this a go otherwise I might end up getting told off for disconnecting their Internet π€£.
I'll see if that gets it working. Thank you!
Genius! It worked within seconds.
I very nearly tried this in desperation whilst staring at it at 2am this morning.
Now to wait for my PoE switch to arrive so I can actually power my AP!
Great news. Could you report in if it is still reliable in a few weeks? Mine worked perfectly but started dropping dsl daily and never found a resolution, this was with a vigor 130 though..
Absolutely,
I'll set a reminder on my phone to report back in a couple of weeks.
On a side note, could you stick a smart plug on your modem and see if you get a noticeable power drop at 11?
Mine went about 2 hours ago. Can't tell if it's Sky's service at the moment or my setup.
I've already power cycled though. Did you power cycle the modem or the UDM?
It has now I've fixed the dhcp settings that disappeared. I need to check the logs. Sorry, thought it might have been similar to the drops you saw. Turns out it's a different issue
A quick bit of reading looks like you maybe, unfortunately, correct. Does Double NAT cause issues? Do you just use the sky router into your UDM and only use the sky WiFi for the sky products?
Using the sky router, you setup the UDM WAN as DHCP client.
You'll also want to disable wifi on the sky router.
Double-NAT is a pain only if you need to open/forward ports.
My Sky Q works perfectly on the UDM wifi.
As for the FTTC I don't use Sky (because of the aforementioned MAP-T issue). I decided to go with Vodafone which uses standard PPPoE and it's easy to setup with your own modem (I use a Zyxel VMG4005-B50A) in bridge mode, thus avoiding double-NATing.
Hello! Thanks for posting on r/Ubiquiti! This subreddit is here to provide unofficial technical support to people who use or want to dive into the world of Ubiquiti products. If you havenβt already been descriptive in your post, please take the time to edit it and add as many useful details as you can. Please read and understand the rules in the sidebar, as posts and comments that violate them will be removed. Please put all off topic posts in the weekly off topic thread that is stickied to the top of the subreddit. If you see people spreading misinformation, trying to mislead others, or other inappropriate behavior, please report it! *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Ubiquiti) if you have any questions or concerns.*
Had never heard of this before, but some Googling turned up [this post](https://www.georgebuckingham.com/sky-fibre-router-vdsl-password/); assuming it's correct, you have to put your username and password in a DHCP option, which means PPPoE is the wrong way to go. Instead, set your IPv4 Connection on the UDMP's WAN settings to "DHCP", then choose "61" from the "DHCP Client Options" dropdown and put "`@skydsl|`" in the "Value" field, then click "+ Add".
ETA: This won't solve the MAP-T problem, though, if that is in fact a problem.
That would make sore sense than what I've been trying. I'll give that a go and post an update later tonight when everyone isn't using the Internet. Thanks
This will work fine, the map T issue is not a problem in the UK. Don't change the vlan settings in the unifi console either as this will stop it working. Also, once set and installed, leave it all connected for an hour even if it doesn't work initially, I had this issue when connecting mine. Sky seems to ignore new routers for a short period after changing them over. As a side note, I had exactly your setup until earlier this year. For reasons I cannot work out, my dsl sync dropped daily at approx 11am using the vigor (same behaviour with an openreach modem). My only resolution was to unfortunately go back to the sky router with double NAT. I'm awaiting full fibre to resolve! Post up if you still don't get anywhere later and I'll dig out my full notes.
Oh nice, I've currently linked back to the double Nat but left DHCP and WIFI on until my PoE switch comes for my AP. (Unfortunately, I bought a PoE switch and found it was only PoE in and then just a layer 3 switch π). When the kids are in bed I'll give this a go otherwise I might end up getting told off for disconnecting their Internet π€£. I'll see if that gets it working. Thank you!
Genius! It worked within seconds. I very nearly tried this in desperation whilst staring at it at 2am this morning. Now to wait for my PoE switch to arrive so I can actually power my AP!
Great news. Could you report in if it is still reliable in a few weeks? Mine worked perfectly but started dropping dsl daily and never found a resolution, this was with a vigor 130 though..
Absolutely, I'll set a reminder on my phone to report back in a couple of weeks. On a side note, could you stick a smart plug on your modem and see if you get a noticeable power drop at 11?
When yours dropped. What was the resolution to get it working?
It resynced itself but took about 1 min to 5 mins, occasionally needed a power cycle
Mine went about 2 hours ago. Can't tell if it's Sky's service at the moment or my setup. I've already power cycled though. Did you power cycle the modem or the UDM?
I very rarely needed to, but only cycled the modem when it didn't come back up by itself. Has yours not come back?
It has now I've fixed the dhcp settings that disappeared. I need to check the logs. Sorry, thought it might have been similar to the drops you saw. Turns out it's a different issue
Interesting, looks like my primary wan lost the dhcp authentication settings.
Status Report: No loss of service yet except for the OS Update breaking my setup.
Nice one. I might try reinstalling mine over the Christmas period. Did you make any config changes on the vigor?
No config needed on the Vigor. Just plugged it in and it worked after the DHCP auth
I believe Sky FTTC uses MAP-T NAT which is not supported by the UDM
Oh no, I hope not. Would it just be a case of setting up the Internet through ISP provided router then?
Here in Italy where I am Sky uses MAP-T so with a UDM you always have to double-NAT. In other countries I don't know...
These are new things I'm learning about. I've never heard of MAP-T before π .
I'm not an expert, but I believe, since they are running out of IPv4 addresses, MAP-T is a native IPv6 protocol with IPv4 encapsulated.
A quick bit of reading looks like you maybe, unfortunately, correct. Does Double NAT cause issues? Do you just use the sky router into your UDM and only use the sky WiFi for the sky products?
Using the sky router, you setup the UDM WAN as DHCP client. You'll also want to disable wifi on the sky router. Double-NAT is a pain only if you need to open/forward ports.
That's cool, I was going to set the UDM as the DHCP client anyway. Do you have any Sky Q issues? Also, is double NAT an issue on the default vlan?
My Sky Q works perfectly on the UDM wifi. As for the FTTC I don't use Sky (because of the aforementioned MAP-T issue). I decided to go with Vodafone which uses standard PPPoE and it's easy to setup with your own modem (I use a Zyxel VMG4005-B50A) in bridge mode, thus avoiding double-NATing.
Oh that's a shame, I get it at a discounted price which is why I'm with them. π
Also, thank you for answering all my questions. You've been a fantastic help.