Hi,
First I would like to describe current configuration:
I have 8 switches: 5548, all have the same (the newest) firmware and boot image. I've manually set stack id from1 to 8. During this operation, the switches were not connected with each other. I've powered off the switches and connected Dell HDMI cables following the manual: port_1 on switch_1 to port_2 on switch_2, then port_1 on switch_2 to port_2 on switch_3 and so on... and at the end port_1 on switch_8 to port_2 on switch_1, forming the ring.
Problem:
After powering on the switches, they displayed stack id as I set, but..... after a while, switch number 6 changed it's id to 0 and reboots. After it startup, id was 6, but... switch number 8 changed it's id to 0 and reboots. This process repeated over and over again.
I try to remove connection beetwen switch_8 and switch_1 (breaking the ring), and this change nothing, but....
.... when I restore link between switch_8 and switch_1, and remove link beetwen switch 7 and 8, the switches stops rebooting !!!
I've tried to change HDMI cable beetwen switch 7 and 8, but this not help. It doesn't matter if the stack have full ring, or not, if there is a link beetwen 7 and 8, the switches reboots.
Could anyone give me some tips, where to look for any couse that behaviour??? I have another stack build with the same switch model, but it consist 4 units and everything is ok.