we are using 1 3750,1 2960 and several CE 500 switches, the CE 500 switches under 2960 sometimes getting connectivity from 2960 and sometimes getting disconnected.at this time when we unplug the uplink cable & reconnect,getting connectivity.condition is that if 2 CE 500 on same vlan connected to 2960 in 2 same vlan port we are only getting connectivity on 1 CE 500 & other 1 is not able to connect.if we unplug the first one uplink cable on that case the second switch get connected.Pls suggest us what is happing.
