I received my second probe* yesterday (different ASNs) and it is connects via SixXS for IPv6 as the ISP isn't supplying native v6 (despite repeatedly asking when they will catch up on something around for twenty years!). It booted fine and the appear no issues with the IPv4 connectivity but the v6 is going up and down every few minutes (for around the same period.) Not finding anything relevant after searching the forum (nor on google) I'm trying to discover why this might be. My other machines are not experiencing any difficulty with v6 connectivity and the probe is connected to the same 16-port switch as everything else. Suggestions of what to investigate next very welcome! * https://atlas.ripe.net/probes/28800/ Sent via RIPE Forum -- https://www.ripe.net/participate/mail/forum