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Strange networking issues today, DNS? #1227
I have got absolutely no idea what I'm looking at. But pings to google get redirected to WN3000RPv3 which is presumably one of the pi's in the networking cupboard.
There is 100% packet loss to whatever this is, hence these strange issues.
A consequitive dig reveals that my machine keeps failing over to Cloudflare's DNS. Is this a problem with our DNS server? I'm not the only person to have been experiencing this today.
@skos-ninja doing some investigation is seems to cause issues (even though you've blocked it?) when the Ethernet is plugged into it. John C has unplugged the Ethernet now (we tested it unplugged - no packet loss, and then the packet loss restarted when it was plugged back in). Do you have any more info on the problem it was causing?
@amcewen Sorry for the late reply I have been a bit ill.
To me what that looks like is symptoms of the device broadcasting incorrect routes to the network and due to how our Dell switch is configured this route broadcasting is allowed and as such devices will accept the route without first talking to the gateway to confirm it's correct.
I can investigate further to see what settings I can configure on the switch to disallow that type of broadcasts however what I don't want to do is force all traffic to talk via the gateway as the load that will cause may be more significant than the gains we get from thsi