Connection dropped 01:00 on Sunday - Unifi issue?

[benkayuk]

Hi,

I've got FTTC Sky service, i've been using it with a Draytek Vigor 2860n (as just a modem in bridge mode), with a Unifi UDM-PRO acting as router, and authentication the DHCP Option 61 etc.

THis has worked flawlessly for around 6 weeks, since i put it in. However, the connection dropped eaerly hours of Sunday morning. I presumed a line fault, but it hasn't recovered.

Plugging in the old Sky Hub, that can connect OK, so the line is fine.

I wondered if anything had changed regarding authentication or any other settings on Sky's end over the weekend?

Thanks, Ben

[mae-3]

@benkayuk 

Nothing has changed with respect to DHCP Option 61, so that means it's a faulty modem or router you are using, and I'd point my finger at the Vigor router (modem in the bridge) first. And you should ensure that a recent firmware update is not the cause of the issue on either piece of equipment.

[benkayuk]

Thanks, yeh no firmware updates recently. Vigor is on the latest which was from some time in 2021. THe Vigor admin screen shows a green (connected) VDSL status with a public IP both IPv4 and IPv6....so it's weird the UDM-PRO doesn't think it has an IP address....i'm at a total loss.

[benkayuk · Accepted solution]

To anyone reading this in the future, it turned out that despite no changes to the settings having been made, no automatic firmware updates or anything like that, and despite the Draytek still being in bridge mode, for some reason it wasn't responding to requests to assign an IP address.

I had to factory reset the modem, then re-set up and re-enable bridge mode, to regain access