I have a DGS-1248T Rev B as my backbone switch, and 5 DGS-1224T Rev D as my sub switches.
I have been having problems connecting to the web interface. I will reset it, and a day or two later it will stop working on some of the switches. At this moment I can not connect to the 1248T and one of the 1224T's.
Last week It was the 1248T and 2 of the 1224T's.
I have upgraded them all to the latest firmware, but that does not help. Anyone have any clue how I can keep the web admin interface up?