Every two days or so, everything goes down hard. I can't even log into servers, I have to use machine-local accounts to logon locally and reboot them. Then everything is lightning fast and responsive for another 48 hours or so until it all fails again. When they fail, everything stops working. I can't even open powershell. Resource manager shows CPU and Network utilization at 0%. There is nothing running on the domain controllers except normal A/D services.
Today I saw that the domain controllers IP addresses have a subnet prefix length of 128, even though I statically assigned them as 64. They have global ipv6 addresses. As soon as one reboots, it's back to 128 again, and I have to log in locally and change it back to 64.
Another problem, though not fatal, is I notice that ALL local IPv6 traffic is routed over the UTM, even though machines are in the same /64 subnet on the same vlan. I can't figure that one out.
I have UTM configured to hand out IPv6 with DHCPv6 and workstations seem to be configured correctly. The workstations are all DHCP.
I have been at this for 3 days now and I can't figure out what's going on. Where do I start?
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