Since last Friday, I am experiencing DNS resolving issues.
bnt@ubnt:~$ show dns forwarding nameservers ----------------------------------------------- Nameservers configured for DNS forwarding ----------------------------------------------- 208.67.220.220 available via 'statically configured' 8.8.4.4 available via 'statically configured' 208.67.222.222 available via 'statically configured' 8.8.8.8 available via 'statically configured' ubnt@ubnt:~$ show dns forwarding statistics ---------------- Cache statistics ---------------- Cache size: 150 Queries forwarded: 2870 Queries answered locally: 7043 Total DNS entries inserted into cache: 2935 DNS entries removed from cache before expiry: 853 --------------------- Nameserver statistics --------------------- Server: 8.8.8.8 Queries sent: 1655 Queries retried or failed: 167 Server: 208.67.222.222 Queries sent: 1698 Queries retried or failed: 182 Server: 8.8.4.4 Queries sent: 1273 Queries retried or failed: 45 Server: 208.67.220.220 Queries sent: 1553 Queries retried or failed: 235
I am using a BT Openreach Fibre (white) modem connected to the ER-X with PPPoE.
It has been fine for 6 months.
To debug the problem, I have changed cables, changed the BT modem, flashed the ER-X firmware, reset it both ways (runtime and on power), changed the setup of the ER-X to use PoE, etc. tried MSS clamping and hwoffload tweaks, changed system DNS servers, changed it to not use dnsmasq, but it makes no difference... the resolving both in the ER-X or from a network PC is very very patchy and inconsistent.
Can anyone help?
Paully