Router restarting several times a day, high noise margin and DNS problems

[olivertedward]

Hi all - our Sky hub has been restarting itself at random times each day.

I've looked through the router system log and it seems that the restarts happen when there is some sort of fault such as this one:

Nov 25 05:50:45 syslog: BFD echo failed DHCPC got CMS_MSG_BFD_ECHO_FAIL_IPV4, bringing down V4 internet
Nov 25 05:50:59 syslog: BFD echo failed DHCPC got CMS_MSG_BFD_ECHO_FAIL_IPV6, bringing down V6 internet

Looking at the router statistics, the current downstream noise is 25.3db and upstream noise is 21.6db which I understand is well beyond the typical range, i.e. indicative of a fault somewhere on the line.

Previously I've also had DNS problems on windows 10 devices connected to the sky hub, which may be unrelated. I thought these had been solved by switching our laptops to using the opendns servers, however the problems have come back this week.

[Chrisee]

@olivertedward the WAN connection is dropping rather than the hub rebooting which implies a line issue rather than the hub itself. You appear to be on a G.Fast service (Ultrafast over copper as opposed to full fibre) which can be easily unstablised. If you have powerline adapters in your home they can destabilise the G.Fast link as they use similat carrier frequencies causing line drops. There are other things that can do the same. While you cannot control kit outside your home check nothing of your own could be the culprit.

If you can exclude that then report the issue to Sky but their lines are very busy at the moment due to an area wide outage and reports made over the weekend are not actioned by Openreach until Monday at the earliest you are not losing time.