Spanning Tree will be disabled on a port that is not a member of any VLANs. If you're making a VLAN changes using EDM and apply the removal and add in a single step, I've seen it disable spanning tree because of the order it writes the changes.If all...
Did you enable stacking on the SFP+ ports? By default, they are SFP+ ports and the mode needs to be changed to stacking. On an ERS 3600, run “stacking-ports mode stacking”On an ERS 3500, run “rear-ports mode stacking”Save and reboot each switch after...
