2021-01-05 16:50:31 UTC
We are putting an emulator in to replace the alpha. The machine was setup offline, IP and DECNet address changed but we missed adding a service name parameter to the LAT startup so when it initially booted on the customer network, it also presented the same LAT service name as the actual Alpha. That was quickly corrected, the emulator rebooted, and the emulator now has its separate LT service name. The emulator and the alpha are on the same subnet/VLAN/switch with no filtering or load balancing or other possible known problem causers.
Now the DECserver keeps 'losing' the alpha and the emulator as services it will connect to. Only one of them shows up as an available service at a time, either 'alpha' or 'emu'. You cannot connect to 'alpha' when the DECserver sees 'emu' and vice versa. The services on both machines appear to be running normally. One day (or for several hours) one will be available, then for reasons unknown it switches to the other.
We can bounce the decserver if that is likely to help, but I don't recall ever seeing behavior like this before, albeit with older DECservers than the 708. Any ideas?