XG135w connection breaking up

Hello,

I'm experiencing sudden break ups witht he connection with my XG135w.

The configuration is as follows: ISP model with optical connection - unmanaged switch (with nothing else connected except ISP modem and XG) - XG - couple of switches with PoE and two Ubiquiti AP.

It all started on friday last week when I wanted to configure my two Ubiquiti APs with additional Guest WiFi network (with our existing one). After that the Ubiquiti APs started breaking up, so I deleted the newly created Guest WiFi, but after this I realised that our XG is always breaking up the connection to the internet. COuple of times it was WAN interface down, then it was okay but the connection was just broken for couple of seconds (without messaging that the WAN is down), then it went up for another couple of minutes, than breaks and so on (often with the message DNS_PROBE_FINISHED_NXDOMAIN after trying to refresh a site or to open a new one).

We have a ESXi on the network that has a AD virtual machine. The XG has a static DNS IP address set.

I'm not sure where to look at. It was all running smoothly before this Ubiquiti thing. Tried one more time to play with MTU (it was 1500) or to add a second rule to the WAN link manager for going down, but without help.

Any suggestions?

Thank you!



Edited tags
[edited by: Erick Jan at 12:17 AM (GMT -7) on 29 Jul 2022]

Top Replies

  • in reply to Shteki +1 suggested

    Hey ,

    Thank you for the update, use global DNS 8.8.8.8 in DNS 1 preference following with the mentioned one. 
    Under the WAN Link manager under the failover gateways > edit the failover rules and with…